# Exception while creating a custom analyzer

**URL:** <https://discuss.elastic.co/t/exception-while-creating-a-custom-analyzer/14711>\
**Category:** Elasticsearch\
**Created:** [December 4, 2013, 5:51pm UTC](https://discuss.elastic.co/t/exception-while-creating-a-custom-analyzer/14711 "2013-12-04T17:51:47Z")\
**Posts on this page:** 11\
**Page:** 1

<div class="post-metadata">

**Author:** ![Arjit\_Gupta](https://avatars.discourse-cdn.com/v4/letter/a/e9bcb4/32.png) [@Arjit\_Gupta](https://discuss.elastic.co/u/Arjit_Gupta)\
**Post date:** [December 4, 2013, 5:51pm UTC](https://discuss.elastic.co/t/exception-while-creating-a-custom-analyzer/14711/1 "2013-12-04T17:51:47Z")

</div>

Hi,

I am trying to create some custom analyzer. definition:

> <https://gist.github.com/arjitgupta/7792134>

  
My use case is  
If I have an input

1. Remove stop words
2. Remove special characters

So if I have input term is  
"This is a Elastic-Search Test01"  
Output should be

"ElasticSearchTest01"

But when I build the index with the given definition it gives an exception

Caused by: org.elasticsearch.ElasticSearchIllegalArgumentException: failed  
to find char filter type [pattern\_replace] for [special\_char\_pattern]  
at  
org.elasticsearch.index.analysis.AnalysisModule.configure(AnalysisModule.java:189)  
at  
org.elasticsearch.common.inject.AbstractModule.configure(AbstractModule.java:60)  
at  
org.elasticsearch.common.inject.spi.Elements$RecordingBinder.install(Elements.java:201)  
at  
org.elasticsearch.common.inject.spi.Elements.getElements(Elements.java:82)  
at  
org.elasticsearch.common.inject.InjectorShell$Builder.build(InjectorShell.java:130)  
at  
org.elasticsearch.common.inject.InjectorBuilder.build(InjectorBuilder.java:99)  
at  
org.elasticsearch.common.inject.InjectorImpl.createChildInjector(InjectorImpl.java:129)  
at  
org.elasticsearch.common.inject.ModulesBuilder.createChildInjector(ModulesBuilder.java:66)  
at  
org.elasticsearch.indices.InternalIndicesService.createIndex(InternalIndicesService.java:380)  
at  
org.elasticsearch.cluster.metadata.MetaDataCreateIndexService$1.execute(MetaDataCreateIndexService.java:269)  
at  
org.elasticsearch.cluster.service.InternalClusterService$2.run(InternalClusterService.java:229)  
at  
org.elasticsearch.common.util.concurrent.PrioritizedEsThreadPoolExecutor$TieBreakingPrioritizedRunnable.run(PrioritizedEsThreadPoolExecutor.java:95)  
at  
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)  
at  
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)  
at java.lang.Thread.run(Thread.java:680)  
Caused by: org.elasticsearch.common.settings.NoClassSettingsException:  
Failed to load class setting [type] with value [pattern\_replace]  
at  
org.elasticsearch.common.settings.ImmutableSettings.loadClass(ImmutableSettings.java:348)  
at  
org.elasticsearch.common.settings.ImmutableSettings.getAsClass(ImmutableSettings.java:336)  
at  
org.elasticsearch.index.analysis.AnalysisModule.configure(AnalysisModule.java:179)  
... 14 more  
Caused by: java.lang.ClassNotFoundException:  
org.elasticsearch.index.analysis.patternreplace.PatternReplaceCharFilterFactory  
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)  
at java.security.AccessController.doPrivileged(Native Method)  
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)  
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)  
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)  
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)  
at  
org.elasticsearch.common.settings.ImmutableSettings.loadClass(ImmutableSettings.java:346)  
... 16 more

But the  
example [http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/analysis-pattern-replace-charfilter.html](http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/analysis-pattern-replace-charfilter.html)  
is similar to what I wrote. Any clues to write a new analyzer ?

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<div class="post-metadata">

**Author:** ![Ivan](https://avatars.discourse-cdn.com/v4/letter/i/df788c/32.png) [@Ivan](https://discuss.elastic.co/u/Ivan)\
**Post date:** [December 4, 2013, 6:18pm UTC](https://discuss.elastic.co/t/exception-while-creating-a-custom-analyzer/14711/2 "2013-12-04T18:18:10Z")

</div>

Which version of elasticsearch are you using? According to the following  
issue, the

On Wed, Dec 4, 2013 at 9:51 AM, Arjit Gupta [arjit292@gmail.com](mailto:arjit292@gmail.com) wrote:

> Hi,
> 
> I am trying to create some custom analyzer. definition:  
> [Elastic search Analyzer · GitHub](https://gist.github.com/arjitgupta/7792134)  
> My use case is  
> If I have an input
> 
> 1. Remove stop words
> 2. Remove special characters
> 
> So if I have input term is  
> "This is a Elastic-Search Test01"  
> Output should be
> 
> "ElasticSearchTest01"
> 
> But when I build the index with the given definition it gives an  
> exception
> 
> Caused by: org.elasticsearch.ElasticSearchIllegalArgumentException: failed  
> to find char filter type [pattern\_replace] for [special\_char\_pattern]  
> at  
> org.elasticsearch.index.analysis.AnalysisModule.configure(AnalysisModule.java:189)  
> at  
> org.elasticsearch.common.inject.AbstractModule.configure(AbstractModule.java:60)  
> at  
> org.elasticsearch.common.inject.spi.Elements$RecordingBinder.install(Elements.java:201)  
> at  
> org.elasticsearch.common.inject.spi.Elements.getElements(Elements.java:82)  
> at  
> org.elasticsearch.common.inject.InjectorShell$Builder.build(InjectorShell.java:130)  
> at  
> org.elasticsearch.common.inject.InjectorBuilder.build(InjectorBuilder.java:99)  
> at  
> org.elasticsearch.common.inject.InjectorImpl.createChildInjector(InjectorImpl.java:129)  
> at  
> org.elasticsearch.common.inject.ModulesBuilder.createChildInjector(ModulesBuilder.java:66)  
> at  
> org.elasticsearch.indices.InternalIndicesService.createIndex(InternalIndicesService.java:380)  
> at  
> org.elasticsearch.cluster.metadata.MetaDataCreateIndexService$1.execute(MetaDataCreateIndexService.java:269)  
> at  
> org.elasticsearch.cluster.service.InternalClusterService$2.run(InternalClusterService.java:229)  
> at  
> org.elasticsearch.common.util.concurrent.PrioritizedEsThreadPoolExecutor$TieBreakingPrioritizedRunnable.run(PrioritizedEsThreadPoolExecutor.java:95)  
> at  
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)  
> at  
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)  
> at java.lang.Thread.run(Thread.java:680)  
> Caused by: org.elasticsearch.common.settings.NoClassSettingsException:  
> Failed to load class setting [type] with value [pattern\_replace]  
> at  
> org.elasticsearch.common.settings.ImmutableSettings.loadClass(ImmutableSettings.java:348)  
> at  
> org.elasticsearch.common.settings.ImmutableSettings.getAsClass(ImmutableSettings.java:336)  
> at  
> org.elasticsearch.index.analysis.AnalysisModule.configure(AnalysisModule.java:179)  
> ... 14 more  
> Caused by: java.lang.ClassNotFoundException:  
> org.elasticsearch.index.analysis.patternreplace.PatternReplaceCharFilterFactory  
> at java.net.URLClassLoader$1.run(URLClassLoader.java:202)  
> at java.security.AccessController.doPrivileged(Native Method)  
> at java.net.URLClassLoader.findClass(URLClassLoader.java:190)  
> at java.lang.ClassLoader.loadClass(ClassLoader.java:306)  
> at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)  
> at java.lang.ClassLoader.loadClass(ClassLoader.java:247)  
> at  
> org.elasticsearch.common.settings.ImmutableSettings.loadClass(ImmutableSettings.java:346)  
> ... 16 more
> 
> But the example  
> [Elasticsearch Platform — Find real-time answers at scale | Elastic](http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/analysis-pattern-replace-charfilter.html)  
> is similar to what I wrote. Any clues to write a new analyzer ?
> 
> --  
> You received this message because you are subscribed to the Google Groups  
> "elasticsearch" group.  
> To unsubscribe from this group and stop receiving emails from it, send an  
> email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com).  
> To view this discussion on the web visit  
> [https://groups.google.com/d/msgid/elasticsearch/c42ff608-e14c-4689-b0eb-41a197d10624%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/c42ff608-e14c-4689-b0eb-41a197d10624%40googlegroups.com)  
> .  
> For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out).

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<div class="post-metadata">

**Author:** ![Ivan](https://avatars.discourse-cdn.com/v4/letter/i/df788c/32.png) [@Ivan](https://discuss.elastic.co/u/Ivan)\
**Post date:** [December 4, 2013, 6:26pm UTC](https://discuss.elastic.co/t/exception-while-creating-a-custom-analyzer/14711/3 "2013-12-04T18:26:40Z")

</div>

Sorry, sent early by mistake.

Which version of elasticsearch are you using? According to the following  
issue, the filter was added in version 0.90.3.

> <https://github.com/elastic/elasticsearch/issues/3197>
>
> The PatternReplaceCharFilter allows the use of a regex to manipulate the charact…ers in a string before analysis:
> 
> http://lucene.apache.org/core/4\_0\_0-ALPHA/analyzers-common/org/apache/lucene/analysis/pattern/PatternReplaceCharFilter.html

Cheers,

Ivan

On Wed, Dec 4, 2013 at 10:18 AM, Ivan Brusic [ivan@brusic.com](mailto:ivan@brusic.com) wrote:

> Which version of elasticsearch are you using? According to the following  
> issue, the
> 
> On Wed, Dec 4, 2013 at 9:51 AM, Arjit Gupta [arjit292@gmail.com](mailto:arjit292@gmail.com) wrote:
> 
> > Hi,
> > 
> > I am trying to create some custom analyzer. definition:  
> > [Elastic search Analyzer · GitHub](https://gist.github.com/arjitgupta/7792134)  
> > My use case is  
> > If I have an input
> > 
> > 1. Remove stop words
> > 2. Remove special characters
> > 
> > So if I have input term is  
> > "This is a Elastic-Search Test01"  
> > Output should be
> > 
> > "ElasticSearchTest01"
> > 
> > But when I build the index with the given definition it gives an  
> > exception
> > 
> > Caused by: org.elasticsearch.ElasticSearchIllegalArgumentException:  
> > failed to find char filter type [pattern\_replace] for [special\_char\_pattern]  
> > at  
> > org.elasticsearch.index.analysis.AnalysisModule.configure(AnalysisModule.java:189)  
> > at  
> > org.elasticsearch.common.inject.AbstractModule.configure(AbstractModule.java:60)  
> > at  
> > org.elasticsearch.common.inject.spi.Elements$RecordingBinder.install(Elements.java:201)  
> > at  
> > org.elasticsearch.common.inject.spi.Elements.getElements(Elements.java:82)  
> > at  
> > org.elasticsearch.common.inject.InjectorShell$Builder.build(InjectorShell.java:130)  
> > at  
> > org.elasticsearch.common.inject.InjectorBuilder.build(InjectorBuilder.java:99)  
> > at  
> > org.elasticsearch.common.inject.InjectorImpl.createChildInjector(InjectorImpl.java:129)  
> > at  
> > org.elasticsearch.common.inject.ModulesBuilder.createChildInjector(ModulesBuilder.java:66)  
> > at  
> > org.elasticsearch.indices.InternalIndicesService.createIndex(InternalIndicesService.java:380)  
> > at  
> > org.elasticsearch.cluster.metadata.MetaDataCreateIndexService$1.execute(MetaDataCreateIndexService.java:269)  
> > at  
> > org.elasticsearch.cluster.service.InternalClusterService$2.run(InternalClusterService.java:229)  
> > at  
> > org.elasticsearch.common.util.concurrent.PrioritizedEsThreadPoolExecutor$TieBreakingPrioritizedRunnable.run(PrioritizedEsThreadPoolExecutor.java:95)  
> > at  
> > java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)  
> > at  
> > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)  
> > at java.lang.Thread.run(Thread.java:680)  
> > Caused by: org.elasticsearch.common.settings.NoClassSettingsException:  
> > Failed to load class setting [type] with value [pattern\_replace]  
> > at  
> > org.elasticsearch.common.settings.ImmutableSettings.loadClass(ImmutableSettings.java:348)  
> > at  
> > org.elasticsearch.common.settings.ImmutableSettings.getAsClass(ImmutableSettings.java:336)  
> > at  
> > org.elasticsearch.index.analysis.AnalysisModule.configure(AnalysisModule.java:179)  
> > ... 14 more  
> > Caused by: java.lang.ClassNotFoundException:  
> > org.elasticsearch.index.analysis.patternreplace.PatternReplaceCharFilterFactory  
> > at java.net.URLClassLoader$1.run(URLClassLoader.java:202)  
> > at java.security.AccessController.doPrivileged(Native Method)  
> > at java.net.URLClassLoader.findClass(URLClassLoader.java:190)  
> > at java.lang.ClassLoader.loadClass(ClassLoader.java:306)  
> > at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)  
> > at java.lang.ClassLoader.loadClass(ClassLoader.java:247)  
> > at  
> > org.elasticsearch.common.settings.ImmutableSettings.loadClass(ImmutableSettings.java:346)  
> > ... 16 more
> > 
> > But the example  
> > [Elasticsearch Platform — Find real-time answers at scale | Elastic](http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/analysis-pattern-replace-charfilter.html)  
> > is similar to what I wrote. Any clues to write a new analyzer ?
> > 
> > --  
> > You received this message because you are subscribed to the Google Groups  
> > "elasticsearch" group.  
> > To unsubscribe from this group and stop receiving emails from it, send an  
> > email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com).  
> > To view this discussion on the web visit  
> > [https://groups.google.com/d/msgid/elasticsearch/c42ff608-e14c-4689-b0eb-41a197d10624%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/c42ff608-e14c-4689-b0eb-41a197d10624%40googlegroups.com)  
> > .  
> > For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out).

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---

<div class="post-metadata">

**Author:** ![Arjit\_Gupta](https://avatars.discourse-cdn.com/v4/letter/a/e9bcb4/32.png) [@Arjit\_Gupta](https://discuss.elastic.co/u/Arjit_Gupta)\
**Post date:** [December 5, 2013, 1:38am UTC](https://discuss.elastic.co/t/exception-while-creating-a-custom-analyzer/14711/4 "2013-12-05T01:38:23Z")

</div>

Elastic search version is 0.90.1 . I think the char filters came in  
0.90.3.  
Can you please tell me then how can I make an analyzer that just removes  
all the special characters and removes the stop words but makes it only one  
token for the input. I tried

> <https://gist.github.com/arjitgupta/7798768>

On Wednesday, December 4, 2013 11:56:40 PM UTC+5:30, Ivan Brusic wrote:

> Sorry, sent early by mistake.
> 
> Which version of elasticsearch are you using? According to the following  
> issue, the filter was added in version 0.90.3.
> 
> [Add support for PatternReplaceCharFilter · Issue #3197 · elastic/elasticsearch · GitHub](https://github.com/elasticsearch/elasticsearch/issues/3197)
> 
> Cheers,
> 
> Ivan
> 
> On Wed, Dec 4, 2013 at 10:18 AM, Ivan Brusic \<[iv...@brusic.com](mailto:iv...@brusic.com)\<javascript:\>
> 
> > wrote:
> 
> > Which version of elasticsearch are you using? According to the following  
> > issue, the
> > 
> > On Wed, Dec 4, 2013 at 9:51 AM, Arjit Gupta \<[arji...@gmail.com](mailto:arji...@gmail.com)\<javascript:\>
> > 
> > > wrote:
> > 
> > > Hi,
> > > 
> > > I am trying to create some custom analyzer. definition:  
> > > [Elastic search Analyzer · GitHub](https://gist.github.com/arjitgupta/7792134)  
> > > My use case is  
> > > If I have an input
> > > 
> > > 1. Remove stop words
> > > 2. Remove special characters
> > > 
> > > So if I have input term is  
> > > "This is a Elastic-Search Test01"  
> > > Output should be
> > > 
> > > "ElasticSearchTest01"
> > > 
> > > But when I build the index with the given definition it gives an  
> > > exception
> > > 
> > > Caused by: org.elasticsearch.ElasticSearchIllegalArgumentException:  
> > > failed to find char filter type [pattern\_replace] for [special\_char\_pattern]  
> > > at  
> > > org.elasticsearch.index.analysis.AnalysisModule.configure(AnalysisModule.java:189)  
> > > at  
> > > org.elasticsearch.common.inject.AbstractModule.configure(AbstractModule.java:60)  
> > > at  
> > > org.elasticsearch.common.inject.spi.Elements$RecordingBinder.install(Elements.java:201)  
> > > at  
> > > org.elasticsearch.common.inject.spi.Elements.getElements(Elements.java:82)  
> > > at  
> > > org.elasticsearch.common.inject.InjectorShell$Builder.build(InjectorShell.java:130)  
> > > at  
> > > org.elasticsearch.common.inject.InjectorBuilder.build(InjectorBuilder.java:99)  
> > > at  
> > > org.elasticsearch.common.inject.InjectorImpl.createChildInjector(InjectorImpl.java:129)  
> > > at  
> > > org.elasticsearch.common.inject.ModulesBuilder.createChildInjector(ModulesBuilder.java:66)  
> > > at  
> > > org.elasticsearch.indices.InternalIndicesService.createIndex(InternalIndicesService.java:380)  
> > > at  
> > > org.elasticsearch.cluster.metadata.MetaDataCreateIndexService$1.execute(MetaDataCreateIndexService.java:269)  
> > > at  
> > > org.elasticsearch.cluster.service.InternalClusterService$2.run(InternalClusterService.java:229)  
> > > at  
> > > org.elasticsearch.common.util.concurrent.PrioritizedEsThreadPoolExecutor$TieBreakingPrioritizedRunnable.run(PrioritizedEsThreadPoolExecutor.java:95)  
> > > at  
> > > java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)  
> > > at  
> > > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)  
> > > at java.lang.Thread.run(Thread.java:680)  
> > > Caused by: org.elasticsearch.common.settings.NoClassSettingsException:  
> > > Failed to load class setting [type] with value [pattern\_replace]  
> > > at  
> > > org.elasticsearch.common.settings.ImmutableSettings.loadClass(ImmutableSettings.java:348)  
> > > at  
> > > org.elasticsearch.common.settings.ImmutableSettings.getAsClass(ImmutableSettings.java:336)  
> > > at  
> > > org.elasticsearch.index.analysis.AnalysisModule.configure(AnalysisModule.java:179)  
> > > ... 14 more  
> > > Caused by: java.lang.ClassNotFoundException:  
> > > org.elasticsearch.index.analysis.patternreplace.PatternReplaceCharFilterFactory  
> > > at java.net.URLClassLoader$1.run(URLClassLoader.java:202)  
> > > at java.security.AccessController.doPrivileged(Native Method)  
> > > at java.net.URLClassLoader.findClass(URLClassLoader.java:190)  
> > > at java.lang.ClassLoader.loadClass(ClassLoader.java:306)  
> > > at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)  
> > > at java.lang.ClassLoader.loadClass(ClassLoader.java:247)  
> > > at  
> > > org.elasticsearch.common.settings.ImmutableSettings.loadClass(ImmutableSettings.java:346)  
> > > ... 16 more
> > > 
> > > But the example  
> > > [Elasticsearch Platform — Find real-time answers at scale | Elastic](http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/analysis-pattern-replace-charfilter.html)  
> > > is similar to what I wrote. Any clues to write a new analyzer ?
> > > 
> > > --  
> > > You received this message because you are subscribed to the Google  
> > > Groups "elasticsearch" group.  
> > > To unsubscribe from this group and stop receiving emails from it, send  
> > > an email to [elasticsearc...@googlegroups.com](mailto:elasticsearc...@googlegroups.com) \<javascript:\>.  
> > > To view this discussion on the web visit  
> > > [https://groups.google.com/d/msgid/elasticsearch/c42ff608-e14c-4689-b0eb-41a197d10624%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/c42ff608-e14c-4689-b0eb-41a197d10624%40googlegroups.com)  
> > > .  
> > > For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out).

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---

<div class="post-metadata">

**Author:** ![Ivan](https://avatars.discourse-cdn.com/v4/letter/i/df788c/32.png) [@Ivan](https://discuss.elastic.co/u/Ivan)\
**Post date:** [December 5, 2013, 1:48am UTC](https://discuss.elastic.co/t/exception-while-creating-a-custom-analyzer/14711/5 "2013-12-05T01:48:42Z")

</div>

You can use the mapping char filter if you are still on 0.90.1.

> **[Elasticsearch Platform — Find real-time answers at scale](https://www.elastic.co)**
>
> Power insights and outcomes with the Elasticsearch Platform and AI. See into your data and find answers that matter with enterprise solutions designed to help you build, observe, and protect. Try Elasticsearch free today.

You cannot use a stop filter (effectively) with the keyword tokenizer. The  
stop filter works on the tokens that are emitted from the tokenizer, so it  
will not see the tokenized words.

Cheers,

Ivan

On Wed, Dec 4, 2013 at 5:38 PM, Arjit Gupta [arjit292@gmail.com](mailto:arjit292@gmail.com) wrote:

> Elastic search version is 0.90.1 . I think the char filters came in  
> 0.90.3.  
> Can you please tell me then how can I make an analyzer that just removes  
> all the special characters and removes the stop words but makes it only one  
> token for the input. I tried  
> [new analyzer · GitHub](https://gist.github.com/arjitgupta/7798768)
> 
> On Wednesday, December 4, 2013 11:56:40 PM UTC+5:30, Ivan Brusic wrote:
> 
> > Sorry, sent early by mistake.
> > 
> > Which version of elasticsearch are you using? According to the following  
> > issue, the filter was added in version 0.90.3.
> > 
> > [Add support for PatternReplaceCharFilter · Issue #3197 · elastic/elasticsearch · GitHub](https://github.com/elasticsearch/elasticsearch/issues/3197)
> > 
> > Cheers,
> > 
> > Ivan
> > 
> > On Wed, Dec 4, 2013 at 10:18 AM, Ivan Brusic [iv...@brusic.com](mailto:iv...@brusic.com) wrote:
> > 
> > > Which version of elasticsearch are you using? According to the following  
> > > issue, the
> > > 
> > > On Wed, Dec 4, 2013 at 9:51 AM, Arjit Gupta [arji...@gmail.com](mailto:arji...@gmail.com) wrote:
> > > 
> > > > Hi,
> > > > 
> > > > I am trying to create some custom analyzer. definition:  
> > > > [Elastic search Analyzer · GitHub](https://gist.github.com/arjitgupta/7792134)  
> > > > My use case is  
> > > > If I have an input
> > > > 
> > > > 1. Remove stop words
> > > > 2. Remove special characters
> > > > 
> > > > So if I have input term is  
> > > > "This is a Elastic-Search Test01"  
> > > > Output should be
> > > > 
> > > > "ElasticSearchTest01"
> > > > 
> > > > But when I build the index with the given definition it gives an  
> > > > exception
> > > > 
> > > > Caused by: org.elasticsearch.ElasticSearchIllegalArgumentException:  
> > > > failed to find char filter type [pattern\_replace] for [special\_char\_pattern]  
> > > > at org.elasticsearch.index.analysis.AnalysisModule.  
> > > > configure(AnalysisModule.java:189)  
> > > > at org.elasticsearch.common.inject.AbstractModule.  
> > > > configure(AbstractModule.java:60)  
> > > > at org.elasticsearch.common.inject.spi.Elements$  
> > > > RecordingBinder.install(Elements.java:201)  
> > > > at org.elasticsearch.common.inject.spi.Elements.  
> > > > getElements(Elements.java:82)  
> > > > at org.elasticsearch.common.inject.InjectorShell$Builder.  
> > > > build(InjectorShell.java:130)  
> > > > at org.elasticsearch.common.inject.InjectorBuilder.build(  
> > > > InjectorBuilder.java:99)  
> > > > at org.elasticsearch.common.inject.InjectorImpl.createChildInjector(  
> > > > InjectorImpl.java:129)  
> > > > at org.elasticsearch.common.inject.ModulesBuilder.createChildInjector(  
> > > > ModulesBuilder.java:66)  
> > > > at org.elasticsearch.indices.InternalIndicesService.createIndex(  
> > > > InternalIndicesService.java:380)  
> > > > at org.elasticsearch.cluster.metadata.MetaDataCreateIndexService$1.  
> > > > execute(MetaDataCreateIndexService.java:269)  
> > > > at org.elasticsearch.cluster.service.InternalClusterService$2.run(  
> > > > InternalClusterService.java:229)  
> > > > at org.elasticsearch.common.util.concurrent.  
> > > > PrioritizedEsThreadPoolExecutor$TieBreakingPrioritizedRunnable.run(  
> > > > PrioritizedEsThreadPoolExecutor.java:95)  
> > > > at java.util.concurrent.ThreadPoolExecutor$Worker.  
> > > > runTask(ThreadPoolExecutor.java:886)  
> > > > at java.util.concurrent.ThreadPoolExecutor$Worker.run(  
> > > > ThreadPoolExecutor.java:908)  
> > > > at java.lang.Thread.run(Thread.java:680)  
> > > > Caused by: org.elasticsearch.common.settings.NoClassSettingsException:  
> > > > Failed to load class setting [type] with value [pattern\_replace]  
> > > > at org.elasticsearch.common.settings.ImmutableSettings.  
> > > > loadClass(ImmutableSettings.java:348)  
> > > > at org.elasticsearch.common.settings.ImmutableSettings.  
> > > > getAsClass(ImmutableSettings.java:336)  
> > > > at org.elasticsearch.index.analysis.AnalysisModule.  
> > > > configure(AnalysisModule.java:179)  
> > > > ... 14 more  
> > > > Caused by: java.lang.ClassNotFoundException: org.elasticsearch.index.  
> > > > analysis.patternreplace.PatternReplaceCharFilterFactory  
> > > > at java.net.URLClassLoader$1.run(URLClassLoader.java:202)  
> > > > at java.security.AccessController.doPrivileged(Native Method)  
> > > > at java.net.URLClassLoader.findClass(URLClassLoader.java:190)  
> > > > at java.lang.ClassLoader.loadClass(ClassLoader.java:306)  
> > > > at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)  
> > > > at java.lang.ClassLoader.loadClass(ClassLoader.java:247)  
> > > > at org.elasticsearch.common.settings.ImmutableSettings.  
> > > > loadClass(ImmutableSettings.java:346)  
> > > > ... 16 more
> > > > 
> > > > But the example [Elasticsearch Platform — Find real-time answers at scale | Elastic](http://www.elasticsearch.org/guide/en/)  
> > > > elasticsearch/reference/current/analysis-pattern-  
> > > > replace-charfilter.html  
> > > > is similar to what I wrote. Any clues to write a new analyzer ?
> > > > 
> > > > --  
> > > > You received this message because you are subscribed to the Google  
> > > > Groups "elasticsearch" group.  
> > > > To unsubscribe from this group and stop receiving emails from it, send  
> > > > an email to [elasticsearc...@googlegroups.com](mailto:elasticsearc...@googlegroups.com).
> > > > 
> > > > To view this discussion on the web visit [https://groups.google.com/d/](https://groups.google.com/d/)  
> > > > msgid/elasticsearch/c42ff608-e14c-4689-b0eb-41a197d10624%  
> > > > [40googlegroups.com](http://40googlegroups.com).  
> > > > For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out).
> > 
> > --  
> > You received this message because you are subscribed to the Google Groups  
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> > To view this discussion on the web visit  
> > [https://groups.google.com/d/msgid/elasticsearch/d39e6dc4-b0c6-4cfb-814b-880482fa854f%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/d39e6dc4-b0c6-4cfb-814b-880482fa854f%40googlegroups.com)  
> > .
> 
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<div class="post-metadata">

**Author:** ![Arjit\_Gupta](https://avatars.discourse-cdn.com/v4/letter/a/e9bcb4/32.png) [@Arjit\_Gupta](https://discuss.elastic.co/u/Arjit_Gupta)\
**Post date:** [December 5, 2013, 2:24am UTC](https://discuss.elastic.co/t/exception-while-creating-a-custom-analyzer/14711/6 "2013-12-05T02:24:19Z")

</div>

So, How can I just effectively remove stop words and still the input is  
just one token ?

Thanks ,  
Arjit

On Thu, Dec 5, 2013 at 7:18 AM, Ivan Brusic [ivan@brusic.com](mailto:ivan@brusic.com) wrote:

> You can use the mapping char filter if you are still on 0.90.1.  
> [Elasticsearch Platform — Find real-time answers at scale | Elastic](http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/analysis-mapping-charfilter.html)
> 
> You cannot use a stop filter (effectively) with the keyword tokenizer. The  
> stop filter works on the tokens that are emitted from the tokenizer, so it  
> will not see the tokenized words.
> 
> Cheers,
> 
> Ivan
> 
> On Wed, Dec 4, 2013 at 5:38 PM, Arjit Gupta [arjit292@gmail.com](mailto:arjit292@gmail.com) wrote:
> 
> > Elastic search version is 0.90.1 . I think the char filters came in  
> > 0.90.3.  
> > Can you please tell me then how can I make an analyzer that just removes  
> > all the special characters and removes the stop words but makes it only one  
> > token for the input. I tried  
> > [new analyzer · GitHub](https://gist.github.com/arjitgupta/7798768)
> > 
> > On Wednesday, December 4, 2013 11:56:40 PM UTC+5:30, Ivan Brusic wrote:
> > 
> > > Sorry, sent early by mistake.
> > > 
> > > Which version of elasticsearch are you using? According to the following  
> > > issue, the filter was added in version 0.90.3.
> > > 
> > > [Add support for PatternReplaceCharFilter · Issue #3197 · elastic/elasticsearch · GitHub](https://github.com/elasticsearch/elasticsearch/issues/3197)
> > > 
> > > Cheers,
> > > 
> > > Ivan
> > > 
> > > On Wed, Dec 4, 2013 at 10:18 AM, Ivan Brusic [iv...@brusic.com](mailto:iv...@brusic.com) wrote:
> > > 
> > > > Which version of elasticsearch are you using? According to the  
> > > > following issue, the
> > > > 
> > > > On Wed, Dec 4, 2013 at 9:51 AM, Arjit Gupta [arji...@gmail.com](mailto:arji...@gmail.com) wrote:
> > > > 
> > > > > Hi,
> > > > > 
> > > > > I am trying to create some custom analyzer. definition:  
> > > > > [Elastic search Analyzer · GitHub](https://gist.github.com/arjitgupta/7792134)  
> > > > > My use case is  
> > > > > If I have an input
> > > > > 
> > > > > 1. Remove stop words
> > > > > 2. Remove special characters
> > > > > 
> > > > > So if I have input term is  
> > > > > "This is a Elastic-Search Test01"  
> > > > > Output should be
> > > > > 
> > > > > "ElasticSearchTest01"
> > > > > 
> > > > > But when I build the index with the given definition it gives an  
> > > > > exception
> > > > > 
> > > > > Caused by: org.elasticsearch.ElasticSearchIllegalArgumentException:  
> > > > > failed to find char filter type [pattern\_replace] for [special\_char\_pattern]  
> > > > > at org.elasticsearch.index.analysis.AnalysisModule.  
> > > > > configure(AnalysisModule.java:189)  
> > > > > at org.elasticsearch.common.inject.AbstractModule.  
> > > > > configure(AbstractModule.java:60)  
> > > > > at org.elasticsearch.common.inject.spi.Elements$  
> > > > > RecordingBinder.install(Elements.java:201)  
> > > > > at org.elasticsearch.common.inject.spi.Elements.  
> > > > > getElements(Elements.java:82)  
> > > > > at org.elasticsearch.common.inject.InjectorShell$Builder.  
> > > > > build(InjectorShell.java:130)  
> > > > > at org.elasticsearch.common.inject.InjectorBuilder.build(  
> > > > > InjectorBuilder.java:99)  
> > > > > at org.elasticsearch.common.inject.InjectorImpl.createChildInjector(  
> > > > > InjectorImpl.java:129)  
> > > > > at org.elasticsearch.common.inject.ModulesBuilder.  
> > > > > createChildInjector(ModulesBuilder.java:66)  
> > > > > at org.elasticsearch.indices.InternalIndicesService.createIndex(  
> > > > > InternalIndicesService.java:380)  
> > > > > at org.elasticsearch.cluster.metadata.MetaDataCreateIndexService$1.  
> > > > > execute(MetaDataCreateIndexService.java:269)  
> > > > > at org.elasticsearch.cluster.service.InternalClusterService$2.run(  
> > > > > InternalClusterService.java:229)  
> > > > > at org.elasticsearch.common.util.concurrent.  
> > > > > PrioritizedEsThreadPoolExecutor$TieBreakingPrioritizedRunnable.run(  
> > > > > PrioritizedEsThreadPoolExecutor.java:95)  
> > > > > at java.util.concurrent.ThreadPoolExecutor$Worker.  
> > > > > runTask(ThreadPoolExecutor.java:886)  
> > > > > at java.util.concurrent.ThreadPoolExecutor$Worker.run(  
> > > > > ThreadPoolExecutor.java:908)  
> > > > > at java.lang.Thread.run(Thread.java:680)  
> > > > > Caused by: org.elasticsearch.common.settings.NoClassSettingsException:  
> > > > > Failed to load class setting [type] with value [pattern\_replace]  
> > > > > at org.elasticsearch.common.settings.ImmutableSettings.  
> > > > > loadClass(ImmutableSettings.java:348)  
> > > > > at org.elasticsearch.common.settings.ImmutableSettings.  
> > > > > getAsClass(ImmutableSettings.java:336)  
> > > > > at org.elasticsearch.index.analysis.AnalysisModule.  
> > > > > configure(AnalysisModule.java:179)  
> > > > > ... 14 more  
> > > > > Caused by: java.lang.ClassNotFoundException: org.elasticsearch.index.  
> > > > > analysis.patternreplace.PatternReplaceCharFilterFactory  
> > > > > at java.net.URLClassLoader$1.run(URLClassLoader.java:202)  
> > > > > at java.security.AccessController.doPrivileged(Native Method)  
> > > > > at java.net.URLClassLoader.findClass(URLClassLoader.java:190)  
> > > > > at java.lang.ClassLoader.loadClass(ClassLoader.java:306)  
> > > > > at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)  
> > > > > at java.lang.ClassLoader.loadClass(ClassLoader.java:247)  
> > > > > at org.elasticsearch.common.settings.ImmutableSettings.  
> > > > > loadClass(ImmutableSettings.java:346)  
> > > > > ... 16 more
> > > > > 
> > > > > But the example [Elasticsearch Platform — Find real-time answers at scale | Elastic](http://www.elasticsearch.org/guide/en/)  
> > > > > elasticsearch/reference/current/analysis-pattern-  
> > > > > replace-charfilter.html  
> > > > > is similar to what I wrote. Any clues to write a new analyzer ?
> > > > > 
> > > > > --  
> > > > > You received this message because you are subscribed to the Google  
> > > > > Groups "elasticsearch" group.  
> > > > > To unsubscribe from this group and stop receiving emails from it, send  
> > > > > an email to [elasticsearc...@googlegroups.com](mailto:elasticsearc...@googlegroups.com).
> > > > > 
> > > > > To view this discussion on the web visit [https://groups.google.com/d/](https://groups.google.com/d/)  
> > > > > msgid/elasticsearch/c42ff608-e14c-4689-b0eb-41a197d10624%  
> > > > > [40googlegroups.com](http://40googlegroups.com).  
> > > > > For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out).
> > > 
> > > --  
> > > You received this message because you are subscribed to the Google Groups  
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> > > email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com).  
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> > > [https://groups.google.com/d/msgid/elasticsearch/d39e6dc4-b0c6-4cfb-814b-880482fa854f%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/d39e6dc4-b0c6-4cfb-814b-880482fa854f%40googlegroups.com)  
> > > .
> > 
> > For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out).
> 
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> .
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<div class="post-metadata">

**Author:** ![Ivan](https://avatars.discourse-cdn.com/v4/letter/i/df788c/32.png) [@Ivan](https://discuss.elastic.co/u/Ivan)\
**Post date:** [December 5, 2013, 3:54am UTC](https://discuss.elastic.co/t/exception-while-creating-a-custom-analyzer/14711/7 "2013-12-05T03:54:12Z")

</div>

Quite simply: you can't. At least not in any way I can think of. You can  
fake it somewhat with the mapping/patternreplace filter, but you would have  
to account for word boundaries as well which are normally taken care of by  
the tokenizer.

--  
Ivan

On Wed, Dec 4, 2013 at 6:24 PM, Arjit Gupta [arjit292@gmail.com](mailto:arjit292@gmail.com) wrote:

> So, How can I just effectively remove stop words and still the input is  
> just one token ?
> 
> Thanks ,  
> Arjit
> 
> On Thu, Dec 5, 2013 at 7:18 AM, Ivan Brusic [ivan@brusic.com](mailto:ivan@brusic.com) wrote:
> 
> > You can use the mapping char filter if you are still on 0.90.1.  
> > [Elasticsearch Platform — Find real-time answers at scale | Elastic](http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/analysis-mapping-charfilter.html)
> > 
> > You cannot use a stop filter (effectively) with the keyword tokenizer.  
> > The stop filter works on the tokens that are emitted from the tokenizer, so  
> > it will not see the tokenized words.
> > 
> > Cheers,
> > 
> > Ivan
> > 
> > On Wed, Dec 4, 2013 at 5:38 PM, Arjit Gupta [arjit292@gmail.com](mailto:arjit292@gmail.com) wrote:
> > 
> > > Elastic search version is 0.90.1 . I think the char filters came in  
> > > 0.90.3.  
> > > Can you please tell me then how can I make an analyzer that just removes  
> > > all the special characters and removes the stop words but makes it only one  
> > > token for the input. I tried  
> > > [new analyzer · GitHub](https://gist.github.com/arjitgupta/7798768)
> > > 
> > > On Wednesday, December 4, 2013 11:56:40 PM UTC+5:30, Ivan Brusic wrote:
> > > 
> > > > Sorry, sent early by mistake.
> > > > 
> > > > Which version of elasticsearch are you using? According to the  
> > > > following issue, the filter was added in version 0.90.3.
> > > > 
> > > > [Add support for PatternReplaceCharFilter · Issue #3197 · elastic/elasticsearch · GitHub](https://github.com/elasticsearch/elasticsearch/issues/3197)
> > > > 
> > > > Cheers,
> > > > 
> > > > Ivan
> > > > 
> > > > On Wed, Dec 4, 2013 at 10:18 AM, Ivan Brusic [iv...@brusic.com](mailto:iv...@brusic.com) wrote:
> > > > 
> > > > > Which version of elasticsearch are you using? According to the  
> > > > > following issue, the
> > > > > 
> > > > > On Wed, Dec 4, 2013 at 9:51 AM, Arjit Gupta [arji...@gmail.com](mailto:arji...@gmail.com) wrote:
> > > > > 
> > > > > > Hi,
> > > > > > 
> > > > > > I am trying to create some custom analyzer. definition:  
> > > > > > [Elastic search Analyzer · GitHub](https://gist.github.com/arjitgupta/7792134)  
> > > > > > My use case is  
> > > > > > If I have an input
> > > > > > 
> > > > > > 1. Remove stop words
> > > > > > 2. Remove special characters
> > > > > > 
> > > > > > So if I have input term is  
> > > > > > "This is a Elastic-Search Test01"  
> > > > > > Output should be
> > > > > > 
> > > > > > "ElasticSearchTest01"
> > > > > > 
> > > > > > But when I build the index with the given definition it gives an  
> > > > > > exception
> > > > > > 
> > > > > > Caused by: org.elasticsearch.ElasticSearchIllegalArgumentException:  
> > > > > > failed to find char filter type [pattern\_replace] for [special\_char\_pattern]  
> > > > > > at org.elasticsearch.index.analysis.AnalysisModule.  
> > > > > > configure(AnalysisModule.java:189)  
> > > > > > at org.elasticsearch.common.inject.AbstractModule.  
> > > > > > configure(AbstractModule.java:60)  
> > > > > > at org.elasticsearch.common.inject.spi.Elements$  
> > > > > > RecordingBinder.install(Elements.java:201)  
> > > > > > at org.elasticsearch.common.inject.spi.Elements.  
> > > > > > getElements(Elements.java:82)  
> > > > > > at org.elasticsearch.common.inject.InjectorShell$Builder.  
> > > > > > build(InjectorShell.java:130)  
> > > > > > at org.elasticsearch.common.inject.InjectorBuilder.build(  
> > > > > > InjectorBuilder.java:99)  
> > > > > > at org.elasticsearch.common.inject.InjectorImpl.createChildInjector(  
> > > > > > InjectorImpl.java:129)  
> > > > > > at org.elasticsearch.common.inject.ModulesBuilder.  
> > > > > > createChildInjector(ModulesBuilder.java:66)  
> > > > > > at org.elasticsearch.indices.InternalIndicesService.createIndex(  
> > > > > > InternalIndicesService.java:380)  
> > > > > > at org.elasticsearch.cluster.metadata.MetaDataCreateIndexService$1.  
> > > > > > execute(MetaDataCreateIndexService.java:269)  
> > > > > > at org.elasticsearch.cluster.service.InternalClusterService$2.run(  
> > > > > > InternalClusterService.java:229)  
> > > > > > at org.elasticsearch.common.util.concurrent.  
> > > > > > PrioritizedEsThreadPoolExecutor$TieBreakingPrioritizedRunnable.run(  
> > > > > > PrioritizedEsThreadPoolExecutor.java:95)  
> > > > > > at java.util.concurrent.ThreadPoolExecutor$Worker.  
> > > > > > runTask(ThreadPoolExecutor.java:886)  
> > > > > > at java.util.concurrent.ThreadPoolExecutor$Worker.run(  
> > > > > > ThreadPoolExecutor.java:908)  
> > > > > > at java.lang.Thread.run(Thread.java:680)  
> > > > > > Caused by: org.elasticsearch.common.settings.NoClassSettingsException:  
> > > > > > Failed to load class setting [type] with value [pattern\_replace]  
> > > > > > at org.elasticsearch.common.settings.ImmutableSettings.  
> > > > > > loadClass(ImmutableSettings.java:348)  
> > > > > > at org.elasticsearch.common.settings.ImmutableSettings.  
> > > > > > getAsClass(ImmutableSettings.java:336)  
> > > > > > at org.elasticsearch.index.analysis.AnalysisModule.  
> > > > > > configure(AnalysisModule.java:179)  
> > > > > > ... 14 more  
> > > > > > Caused by: java.lang.ClassNotFoundException: org.elasticsearch.index.  
> > > > > > analysis.patternreplace.PatternReplaceCharFilterFactory  
> > > > > > at java.net.URLClassLoader$1.run(URLClassLoader.java:202)  
> > > > > > at java.security.AccessController.doPrivileged(Native Method)  
> > > > > > at java.net.URLClassLoader.findClass(URLClassLoader.java:190)  
> > > > > > at java.lang.ClassLoader.loadClass(ClassLoader.java:306)  
> > > > > > at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)  
> > > > > > at java.lang.ClassLoader.loadClass(ClassLoader.java:247)  
> > > > > > at org.elasticsearch.common.settings.ImmutableSettings.  
> > > > > > loadClass(ImmutableSettings.java:346)  
> > > > > > ... 16 more
> > > > > > 
> > > > > > But the example [Elasticsearch Platform — Find real-time answers at scale | Elastic](http://www.elasticsearch.org/guide/en/)  
> > > > > > elasticsearch/reference/current/analysis-pattern-  
> > > > > > replace-charfilter.html  
> > > > > > is similar to what I wrote. Any clues to write a new analyzer ?
> > > > > > 
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<div class="post-metadata">

**Author:** ![Arjit\_Gupta](https://avatars.discourse-cdn.com/v4/letter/a/e9bcb4/32.png) [@Arjit\_Gupta](https://discuss.elastic.co/u/Arjit_Gupta)\
**Post date:** [December 5, 2013, 4:01am UTC](https://discuss.elastic.co/t/exception-while-creating-a-custom-analyzer/14711/8 "2013-12-05T04:01:27Z")

</div>

Thanks a lot Ivan for the reply. Can i just remove the special characters  
and white space from the token?  
Example :

I am @testing Elastic-search  
Should become  
IamtestingElasticsearch

So that I can do fuzzy matches on that.

Thanks ,  
Arjit

On Thu, Dec 5, 2013 at 9:24 AM, Ivan Brusic [ivan@brusic.com](mailto:ivan@brusic.com) wrote:

> Quite simply: you can't. At least not in any way I can think of. You can  
> fake it somewhat with the mapping/patternreplace filter, but you would have  
> to account for word boundaries as well which are normally taken care of by  
> the tokenizer.
> 
> --  
> Ivan
> 
> On Wed, Dec 4, 2013 at 6:24 PM, Arjit Gupta [arjit292@gmail.com](mailto:arjit292@gmail.com) wrote:
> 
> > So, How can I just effectively remove stop words and still the input is  
> > just one token ?
> > 
> > Thanks ,  
> > Arjit
> > 
> > On Thu, Dec 5, 2013 at 7:18 AM, Ivan Brusic [ivan@brusic.com](mailto:ivan@brusic.com) wrote:
> > 
> > > You can use the mapping char filter if you are still on 0.90.1.  
> > > [Elasticsearch Platform — Find real-time answers at scale | Elastic](http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/analysis-mapping-charfilter.html)
> > > 
> > > You cannot use a stop filter (effectively) with the keyword tokenizer.  
> > > The stop filter works on the tokens that are emitted from the tokenizer, so  
> > > it will not see the tokenized words.
> > > 
> > > Cheers,
> > > 
> > > Ivan
> > > 
> > > On Wed, Dec 4, 2013 at 5:38 PM, Arjit Gupta [arjit292@gmail.com](mailto:arjit292@gmail.com) wrote:
> > > 
> > > > Elastic search version is 0.90.1 . I think the char filters came in  
> > > > 0.90.3.  
> > > > Can you please tell me then how can I make an analyzer that just  
> > > > removes all the special characters and removes the stop words but makes it  
> > > > only one token for the input. I tried  
> > > > [new analyzer · GitHub](https://gist.github.com/arjitgupta/7798768)
> > > > 
> > > > On Wednesday, December 4, 2013 11:56:40 PM UTC+5:30, Ivan Brusic wrote:
> > > > 
> > > > > Sorry, sent early by mistake.
> > > > > 
> > > > > Which version of elasticsearch are you using? According to the  
> > > > > following issue, the filter was added in version 0.90.3.
> > > > > 
> > > > > [Add support for PatternReplaceCharFilter · Issue #3197 · elastic/elasticsearch · GitHub](https://github.com/elasticsearch/elasticsearch/issues/3197)
> > > > > 
> > > > > Cheers,
> > > > > 
> > > > > Ivan
> > > > > 
> > > > > On Wed, Dec 4, 2013 at 10:18 AM, Ivan Brusic [iv...@brusic.com](mailto:iv...@brusic.com) wrote:
> > > > > 
> > > > > > Which version of elasticsearch are you using? According to the  
> > > > > > following issue, the
> > > > > > 
> > > > > > On Wed, Dec 4, 2013 at 9:51 AM, Arjit Gupta [arji...@gmail.com](mailto:arji...@gmail.com)wrote:
> > > > > > 
> > > > > > > Hi,
> > > > > > > 
> > > > > > > I am trying to create some custom analyzer. definition:  
> > > > > > > [Elastic search Analyzer · GitHub](https://gist.github.com/arjitgupta/7792134)  
> > > > > > > My use case is  
> > > > > > > If I have an input
> > > > > > > 
> > > > > > > 1. Remove stop words
> > > > > > > 2. Remove special characters
> > > > > > > 
> > > > > > > So if I have input term is  
> > > > > > > "This is a Elastic-Search Test01"  
> > > > > > > Output should be
> > > > > > > 
> > > > > > > "ElasticSearchTest01"
> > > > > > > 
> > > > > > > But when I build the index with the given definition it gives an  
> > > > > > > exception
> > > > > > > 
> > > > > > > Caused by: org.elasticsearch.ElasticSearchIllegalArgumentException:  
> > > > > > > failed to find char filter type [pattern\_replace] for [special\_char\_pattern]  
> > > > > > > at org.elasticsearch.index.analysis.AnalysisModule.  
> > > > > > > configure(AnalysisModule.java:189)  
> > > > > > > at org.elasticsearch.common.inject.AbstractModule.  
> > > > > > > configure(AbstractModule.java:60)  
> > > > > > > at org.elasticsearch.common.inject.spi.Elements$  
> > > > > > > RecordingBinder.install(Elements.java:201)  
> > > > > > > at org.elasticsearch.common.inject.spi.Elements.  
> > > > > > > getElements(Elements.java:82)  
> > > > > > > at org.elasticsearch.common.inject.InjectorShell$Builder.  
> > > > > > > build(InjectorShell.java:130)  
> > > > > > > at org.elasticsearch.common.inject.InjectorBuilder.build(  
> > > > > > > InjectorBuilder.java:99)  
> > > > > > > at org.elasticsearch.common.inject.InjectorImpl.createChildInjector(  
> > > > > > > InjectorImpl.java:129)  
> > > > > > > at org.elasticsearch.common.inject.ModulesBuilder.  
> > > > > > > createChildInjector(ModulesBuilder.java:66)  
> > > > > > > at org.elasticsearch.indices.InternalIndicesService.createIndex(  
> > > > > > > InternalIndicesService.java:380)  
> > > > > > > at org.elasticsearch.cluster.metadata.MetaDataCreateIndexService$1.  
> > > > > > > execute(MetaDataCreateIndexService.java:269)  
> > > > > > > at org.elasticsearch.cluster.service.InternalClusterService$2.run(  
> > > > > > > InternalClusterService.java:229)  
> > > > > > > at org.elasticsearch.common.util.concurrent.  
> > > > > > > PrioritizedEsThreadPoolExecutor$TieBreakingPrioritizedRunnable.run(  
> > > > > > > PrioritizedEsThreadPoolExecutor.java:95)  
> > > > > > > at java.util.concurrent.ThreadPoolExecutor$Worker.  
> > > > > > > runTask(ThreadPoolExecutor.java:886)  
> > > > > > > at java.util.concurrent.ThreadPoolExecutor$Worker.run(  
> > > > > > > ThreadPoolExecutor.java:908)  
> > > > > > > at java.lang.Thread.run(Thread.java:680)  
> > > > > > > Caused by: org.elasticsearch.common.settings.NoClassSettingsException:  
> > > > > > > Failed to load class setting [type] with value [pattern\_replace]  
> > > > > > > at org.elasticsearch.common.settings.ImmutableSettings.  
> > > > > > > loadClass(ImmutableSettings.java:348)  
> > > > > > > at org.elasticsearch.common.settings.ImmutableSettings.  
> > > > > > > getAsClass(ImmutableSettings.java:336)  
> > > > > > > at org.elasticsearch.index.analysis.AnalysisModule.  
> > > > > > > configure(AnalysisModule.java:179)  
> > > > > > > ... 14 more  
> > > > > > > Caused by: java.lang.ClassNotFoundException:  
> > > > > > > org.elasticsearch.index.analysis.patternreplace.  
> > > > > > > PatternReplaceCharFilterFactory  
> > > > > > > at java.net.URLClassLoader$1.run(URLClassLoader.java:202)  
> > > > > > > at java.security.AccessController.doPrivileged(Native Method)  
> > > > > > > at java.net.URLClassLoader.findClass(URLClassLoader.java:190)  
> > > > > > > at java.lang.ClassLoader.loadClass(ClassLoader.java:306)  
> > > > > > > at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)  
> > > > > > > at java.lang.ClassLoader.loadClass(ClassLoader.java:247)  
> > > > > > > at org.elasticsearch.common.settings.ImmutableSettings.  
> > > > > > > loadClass(ImmutableSettings.java:346)  
> > > > > > > ... 16 more
> > > > > > > 
> > > > > > > But the example [Elasticsearch Platform — Find real-time answers at scale | Elastic](http://www.elasticsearch.org/guide/en/)  
> > > > > > > elasticsearch/reference/current/analysis-pattern-  
> > > > > > > replace-charfilter.html  
> > > > > > > is similar to what I wrote. Any clues to write a new analyzer ?
> > > > > > > 
> > > > > > > --  
> > > > > > > You received this message because you are subscribed to the Google  
> > > > > > > Groups "elasticsearch" group.  
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> > > > > > > send an email to [elasticsearc...@googlegroups.com](mailto:elasticsearc...@googlegroups.com).
> > > > > > > 
> > > > > > > To view this discussion on the web visit  
> > > > > > > [https://groups.google.com/d/msgid/elasticsearch/c42ff608-](https://groups.google.com/d/msgid/elasticsearch/c42ff608-)  
> > > > > > > e14c-4689-b0eb-41a197d10624%[40googlegroups.com](http://40googlegroups.com).  
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<div class="post-metadata">

**Author:** ![sina\_tamanna](https://avatars.discourse-cdn.com/v4/letter/s/a6a055/32.png) [@sina\_tamanna](https://discuss.elastic.co/u/sina_tamanna)\
**Post date:** [December 5, 2013, 7:51am UTC](https://discuss.elastic.co/t/exception-while-creating-a-custom-analyzer/14711/9 "2013-12-05T07:51:56Z")

</div>

Sure, you could just use your special\_char\_pattern filter and extend it to  
include whitespaces, or just create a similar filter for only whitespace  
with regex \s+

On Thursday, December 5, 2013 5:01:27 AM UTC+1, Arjit Gupta wrote:

> Thanks a lot Ivan for the reply. Can i just remove the special characters  
> and white space from the token?  
> Example :
> 
> I am @testing Elastic-search  
> Should become  
> IamtestingElasticsearch
> 
> So that I can do fuzzy matches on that.
> 
> Thanks ,  
> Arjit
> 
> On Thu, Dec 5, 2013 at 9:24 AM, Ivan Brusic \<[iv...@brusic.com](mailto:iv...@brusic.com)\<javascript:\>
> 
> > wrote:
> 
> > Quite simply: you can't. At least not in any way I can think of. You can  
> > fake it somewhat with the mapping/patternreplace filter, but you would have  
> > to account for word boundaries as well which are normally taken care of by  
> > the tokenizer.
> > 
> > --  
> > Ivan
> > 
> > On Wed, Dec 4, 2013 at 6:24 PM, Arjit Gupta \<[arji...@gmail.com](mailto:arji...@gmail.com)\<javascript:\>
> > 
> > > wrote:
> > 
> > > So, How can I just effectively remove stop words and still the input is  
> > > just one token ?
> > > 
> > > Thanks ,  
> > > Arjit
> > > 
> > > On Thu, Dec 5, 2013 at 7:18 AM, Ivan Brusic \<[iv...@brusic.com](mailto:iv...@brusic.com)\<javascript:\>
> > > 
> > > > wrote:
> > > 
> > > > You can use the mapping char filter if you are still on 0.90.1.  
> > > > [Elasticsearch Platform — Find real-time answers at scale | Elastic](http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/analysis-mapping-charfilter.html)
> > > > 
> > > > You cannot use a stop filter (effectively) with the keyword tokenizer.  
> > > > The stop filter works on the tokens that are emitted from the tokenizer, so  
> > > > it will not see the tokenized words.
> > > > 
> > > > Cheers,
> > > > 
> > > > Ivan
> > > > 
> > > > On Wed, Dec 4, 2013 at 5:38 PM, Arjit Gupta \<[arji...@gmail.com](mailto:arji...@gmail.com)\<javascript:\>
> > > > 
> > > > > wrote:
> > > > 
> > > > > Elastic search version is 0.90.1 . I think the char filters came in  
> > > > > 0.90.3.  
> > > > > Can you please tell me then how can I make an analyzer that just  
> > > > > removes all the special characters and removes the stop words but makes it  
> > > > > only one token for the input. I tried  
> > > > > [new analyzer · GitHub](https://gist.github.com/arjitgupta/7798768)
> > > > > 
> > > > > On Wednesday, December 4, 2013 11:56:40 PM UTC+5:30, Ivan Brusic wrote:
> > > > > 
> > > > > > Sorry, sent early by mistake.
> > > > > > 
> > > > > > Which version of elasticsearch are you using? According to the  
> > > > > > following issue, the filter was added in version 0.90.3.
> > > > > > 
> > > > > > [Add support for PatternReplaceCharFilter · Issue #3197 · elastic/elasticsearch · GitHub](https://github.com/elasticsearch/elasticsearch/issues/3197)
> > > > > > 
> > > > > > Cheers,
> > > > > > 
> > > > > > Ivan
> > > > > > 
> > > > > > On Wed, Dec 4, 2013 at 10:18 AM, Ivan Brusic [iv...@brusic.com](mailto:iv...@brusic.com)wrote:
> > > > > > 
> > > > > > > Which version of elasticsearch are you using? According to the  
> > > > > > > following issue, the
> > > > > > > 
> > > > > > > On Wed, Dec 4, 2013 at 9:51 AM, Arjit Gupta [arji...@gmail.com](mailto:arji...@gmail.com)wrote:
> > > > > > > 
> > > > > > > > Hi,
> > > > > > > > 
> > > > > > > > I am trying to create some custom analyzer. definition:  
> > > > > > > > [Elastic search Analyzer · GitHub](https://gist.github.com/arjitgupta/7792134)  
> > > > > > > > My use case is  
> > > > > > > > If I have an input
> > > > > > > > 
> > > > > > > > 1. Remove stop words
> > > > > > > > 2. Remove special characters
> > > > > > > > 
> > > > > > > > So if I have input term is  
> > > > > > > > "This is a Elastic-Search Test01"  
> > > > > > > > Output should be
> > > > > > > > 
> > > > > > > > "ElasticSearchTest01"
> > > > > > > > 
> > > > > > > > But when I build the index with the given definition it gives an  
> > > > > > > > exception
> > > > > > > > 
> > > > > > > > Caused by: org.elasticsearch.ElasticSearchIllegalArgumentException:  
> > > > > > > > failed to find char filter type [pattern\_replace] for [special\_char\_pattern]  
> > > > > > > > at org.elasticsearch.index.analysis.AnalysisModule.  
> > > > > > > > configure(AnalysisModule.java:189)  
> > > > > > > > at org.elasticsearch.common.inject.AbstractModule.  
> > > > > > > > configure(AbstractModule.java:60)  
> > > > > > > > at org.elasticsearch.common.inject.spi.Elements$  
> > > > > > > > RecordingBinder.install(Elements.java:201)  
> > > > > > > > at org.elasticsearch.common.inject.spi.Elements.  
> > > > > > > > getElements(Elements.java:82)  
> > > > > > > > at org.elasticsearch.common.inject.InjectorShell$Builder.  
> > > > > > > > build(InjectorShell.java:130)  
> > > > > > > > at org.elasticsearch.common.inject.InjectorBuilder.build(  
> > > > > > > > InjectorBuilder.java:99)  
> > > > > > > > at org.elasticsearch.common.inject.InjectorImpl.  
> > > > > > > > createChildInjector(InjectorImpl.java:129)  
> > > > > > > > at org.elasticsearch.common.inject.ModulesBuilder.  
> > > > > > > > createChildInjector(ModulesBuilder.java:66)  
> > > > > > > > at org.elasticsearch.indices.InternalIndicesService.createIndex(  
> > > > > > > > InternalIndicesService.java:380)  
> > > > > > > > at org.elasticsearch.cluster.metadata.  
> > > > > > > > MetaDataCreateIndexService$1.execute(MetaDataCreateIndexService.  
> > > > > > > > java:269)  
> > > > > > > > at org.elasticsearch.cluster.service.InternalClusterService$2.run(  
> > > > > > > > InternalClusterService.java:229)  
> > > > > > > > at org.elasticsearch.common.util.concurrent.  
> > > > > > > > PrioritizedEsThreadPoolExecutor$TieBreakingPrioritizedRunnable.run(  
> > > > > > > > PrioritizedEsThreadPoolExecutor.java:95)  
> > > > > > > > at java.util.concurrent.ThreadPoolExecutor$Worker.  
> > > > > > > > runTask(ThreadPoolExecutor.java:886)  
> > > > > > > > at java.util.concurrent.ThreadPoolExecutor$Worker.run(  
> > > > > > > > ThreadPoolExecutor.java:908)  
> > > > > > > > at java.lang.Thread.run(Thread.java:680)  
> > > > > > > > Caused by: org.elasticsearch.common.settings.NoClassSettingsException:  
> > > > > > > > Failed to load class setting [type] with value [pattern\_replace]  
> > > > > > > > at org.elasticsearch.common.settings.ImmutableSettings.  
> > > > > > > > loadClass(ImmutableSettings.java:348)  
> > > > > > > > at org.elasticsearch.common.settings.ImmutableSettings.  
> > > > > > > > getAsClass(ImmutableSettings.java:336)  
> > > > > > > > at org.elasticsearch.index.analysis.AnalysisModule.  
> > > > > > > > configure(AnalysisModule.java:179)  
> > > > > > > > ... 14 more  
> > > > > > > > Caused by: java.lang.ClassNotFoundException:  
> > > > > > > > org.elasticsearch.index.analysis.patternreplace.  
> > > > > > > > PatternReplaceCharFilterFactory  
> > > > > > > > at java.net.URLClassLoader$1.run(URLClassLoader.java:202)  
> > > > > > > > at java.security.AccessController.doPrivileged(Native Method)  
> > > > > > > > at java.net.URLClassLoader.findClass(URLClassLoader.java:190)  
> > > > > > > > at java.lang.ClassLoader.loadClass(ClassLoader.java:306)  
> > > > > > > > at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)  
> > > > > > > > at java.lang.ClassLoader.loadClass(ClassLoader.java:247)  
> > > > > > > > at org.elasticsearch.common.settings.ImmutableSettings.  
> > > > > > > > loadClass(ImmutableSettings.java:346)  
> > > > > > > > ... 16 more
> > > > > > > > 
> > > > > > > > But the example [Elasticsearch Platform — Find real-time answers at scale | Elastic](http://www.elasticsearch.org/guide/en/)  
> > > > > > > > elasticsearch/reference/current/analysis-pattern-  
> > > > > > > > replace-charfilter.html  
> > > > > > > > is similar to what I wrote. Any clues to write a new analyzer ?
> > > > > > > > 
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> > > > > > > > [https://groups.google.com/d/msgid/elasticsearch/c42ff608-](https://groups.google.com/d/msgid/elasticsearch/c42ff608-)  
> > > > > > > > e14c-4689-b0eb-41a197d10624%[40googlegroups.com](http://40googlegroups.com).  
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<div class="post-metadata">

**Author:** ![Arjit\_Gupta](https://avatars.discourse-cdn.com/v4/letter/a/e9bcb4/32.png) [@Arjit\_Gupta](https://discuss.elastic.co/u/Arjit_Gupta)\
**Post date:** [December 10, 2013, 8:08am UTC](https://discuss.elastic.co/t/exception-while-creating-a-custom-analyzer/14711/10 "2013-12-10T08:08:53Z")

</div>

Thanks a lot Ivan and Sina :).

Thanks ,  
Arjit

On Thu, Dec 5, 2013 at 1:21 PM, Sina Tamanna [sina.tamanna@gmail.com](mailto:sina.tamanna@gmail.com) wrote:

> Sure, you could just use your special\_char\_pattern filter and extend it  
> to include whitespaces, or just create a similar filter for only whitespace  
> with regex \s+
> 
> On Thursday, December 5, 2013 5:01:27 AM UTC+1, Arjit Gupta wrote:
> 
> > Thanks a lot Ivan for the reply. Can i just remove the special characters  
> > and white space from the token?  
> > Example :
> > 
> > I am @testing Elastic-search  
> > Should become  
> > IamtestingElasticsearch
> > 
> > So that I can do fuzzy matches on that.
> > 
> > Thanks ,  
> > Arjit
> > 
> > On Thu, Dec 5, 2013 at 9:24 AM, Ivan Brusic [iv...@brusic.com](mailto:iv...@brusic.com) wrote:
> > 
> > > Quite simply: you can't. At least not in any way I can think of. You can  
> > > fake it somewhat with the mapping/patternreplace filter, but you would have  
> > > to account for word boundaries as well which are normally taken care of by  
> > > the tokenizer.
> > > 
> > > --  
> > > Ivan
> > > 
> > > On Wed, Dec 4, 2013 at 6:24 PM, Arjit Gupta [arji...@gmail.com](mailto:arji...@gmail.com) wrote:
> > > 
> > > > So, How can I just effectively remove stop words and still the input is  
> > > > just one token ?
> > > > 
> > > > Thanks ,  
> > > > Arjit
> > > > 
> > > > On Thu, Dec 5, 2013 at 7:18 AM, Ivan Brusic [iv...@brusic.com](mailto:iv...@brusic.com) wrote:
> > > > 
> > > > > You can use the mapping char filter if you are still on 0.90.1.  
> > > > > [Elasticsearch Platform — Find real-time answers at scale | Elastic](http://www.elasticsearch.org/guide/en/elasticsearch/reference/)  
> > > > > current/analysis-mapping-charfilter.html
> > > > > 
> > > > > You cannot use a stop filter (effectively) with the keyword tokenizer.  
> > > > > The stop filter works on the tokens that are emitted from the tokenizer, so  
> > > > > it will not see the tokenized words.
> > > > > 
> > > > > Cheers,
> > > > > 
> > > > > Ivan
> > > > > 
> > > > > On Wed, Dec 4, 2013 at 5:38 PM, Arjit Gupta [arji...@gmail.com](mailto:arji...@gmail.com) wrote:
> > > > > 
> > > > > > Elastic search version is 0.90.1 . I think the char filters came in  
> > > > > > 0.90.3.  
> > > > > > Can you please tell me then how can I make an analyzer that just  
> > > > > > removes all the special characters and removes the stop words but makes it  
> > > > > > only one token for the input. I tried  
> > > > > > [new analyzer · GitHub](https://gist.github.com/arjitgupta/7798768)
> > > > > > 
> > > > > > On Wednesday, December 4, 2013 11:56:40 PM UTC+5:30, Ivan Brusic  
> > > > > > wrote:
> > > > > > 
> > > > > > > Sorry, sent early by mistake.
> > > > > > > 
> > > > > > > Which version of elasticsearch are you using? According to the  
> > > > > > > following issue, the filter was added in version 0.90.3.
> > > > > > > 
> > > > > > > [Add support for PatternReplaceCharFilter · Issue #3197 · elastic/elasticsearch · GitHub](https://github.com/elasticsearch/elasticsearch/issues/3197)
> > > > > > > 
> > > > > > > Cheers,
> > > > > > > 
> > > > > > > Ivan
> > > > > > > 
> > > > > > > On Wed, Dec 4, 2013 at 10:18 AM, Ivan Brusic [iv...@brusic.com](mailto:iv...@brusic.com)wrote:
> > > > > > > 
> > > > > > > > Which version of elasticsearch are you using? According to the  
> > > > > > > > following issue, the
> > > > > > > > 
> > > > > > > > On Wed, Dec 4, 2013 at 9:51 AM, Arjit Gupta [arji...@gmail.com](mailto:arji...@gmail.com)wrote:
> > > > > > > > 
> > > > > > > > > Hi,
> > > > > > > > > 
> > > > > > > > > I am trying to create some custom analyzer. definition:  
> > > > > > > > > [Elastic search Analyzer · GitHub](https://gist.github.com/arjitgupta/7792134)  
> > > > > > > > > My use case is  
> > > > > > > > > If I have an input
> > > > > > > > > 
> > > > > > > > > 1. Remove stop words
> > > > > > > > > 2. Remove special characters
> > > > > > > > > 
> > > > > > > > > So if I have input term is  
> > > > > > > > > "This is a Elastic-Search Test01"  
> > > > > > > > > Output should be
> > > > > > > > > 
> > > > > > > > > "ElasticSearchTest01"
> > > > > > > > > 
> > > > > > > > > But when I build the index with the given definition it gives an  
> > > > > > > > > exception
> > > > > > > > > 
> > > > > > > > > Caused by: org.elasticsearch.ElasticSearchIllegalArgumentException:  
> > > > > > > > > failed to find char filter type [pattern\_replace] for [special\_char\_pattern]  
> > > > > > > > > at org.elasticsearch.index.analysis.AnalysisModule.configure(  
> > > > > > > > > AnalysisModule.java:189)  
> > > > > > > > > at org.elasticsearch.common.inject.AbstractModule.configure(  
> > > > > > > > > AbstractModule.java:60)  
> > > > > > > > > at org.elasticsearch.common.inject.spi.Elements$RecordingBinder  
> > > > > > > > > .install(Elements.java:201)  
> > > > > > > > > at org.elasticsearch.common.inject.spi.Elements.getElements(  
> > > > > > > > > Elements.java:82)  
> > > > > > > > > at org.elasticsearch.common.inject.InjectorShell$Builder.build(  
> > > > > > > > > InjectorShell.java:130)  
> > > > > > > > > at org.elasticsearch.common.inject.InjectorBuilder.build(Inject  
> > > > > > > > > orBuilder.java:99)  
> > > > > > > > > at org.elasticsearch.common.inject.InjectorImpl.createChildInje  
> > > > > > > > > ctor(InjectorImpl.java:129)  
> > > > > > > > > at org.elasticsearch.common.inject.ModulesBuilder.createChildIn  
> > > > > > > > > jector(ModulesBuilder.java:66)  
> > > > > > > > > at org.elasticsearch.indices.InternalIndicesService.createIndex(  
> > > > > > > > > InternalIndicesService.java:380)  
> > > > > > > > > at org.elasticsearch.cluster.metadata.MetaDataCreateIndexServic  
> > > > > > > > > e$1.execute(MetaDataCreateIndexService.java:269)  
> > > > > > > > > at org.elasticsearch.cluster.service.InternalClusterService$2.run(  
> > > > > > > > > InternalClusterService.java:229)  
> > > > > > > > > at org.elasticsearch.common.util.concurrent.PrioritizedEsThread  
> > > > > > > > > PoolExecutor$TieBreakingPrioritizedRunnable.run(PrioritizedE  
> > > > > > > > > sThreadPoolExecutor.java:95)  
> > > > > > > > > at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(  
> > > > > > > > > ThreadPoolExecutor.java:886)  
> > > > > > > > > at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoo  
> > > > > > > > > lExecutor.java:908)  
> > > > > > > > > at java.lang.Thread.run(Thread.java:680)  
> > > > > > > > > Caused by: org.elasticsearch.common.settings.NoClassSettingsException:  
> > > > > > > > > Failed to load class setting [type] with value [pattern\_replace]  
> > > > > > > > > at org.elasticsearch.common.settings.ImmutableSettings.loadClas  
> > > > > > > > > s(ImmutableSettings.java:348)  
> > > > > > > > > at org.elasticsearch.common.settings.ImmutableSettings.getAsCla  
> > > > > > > > > ss(ImmutableSettings.java:336)  
> > > > > > > > > at org.elasticsearch.index.analysis.AnalysisModule.configure(  
> > > > > > > > > AnalysisModule.java:179)  
> > > > > > > > > ... 14 more  
> > > > > > > > > Caused by: java.lang.ClassNotFoundException:  
> > > > > > > > > org.elasticsearch.index.analysis.patternreplace.PatternRepla  
> > > > > > > > > ceCharFilterFactory  
> > > > > > > > > at java.net.URLClassLoader$1.run(URLClassLoader.java:202)  
> > > > > > > > > at java.security.AccessController.doPrivileged(Native Method)  
> > > > > > > > > at java.net.URLClassLoader.findClass(URLClassLoader.java:190)  
> > > > > > > > > at java.lang.ClassLoader.loadClass(ClassLoader.java:306)  
> > > > > > > > > at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)  
> > > > > > > > > at java.lang.ClassLoader.loadClass(ClassLoader.java:247)  
> > > > > > > > > at org.elasticsearch.common.settings.ImmutableSettings.loadClas  
> > > > > > > > > s(ImmutableSettings.java:346)  
> > > > > > > > > ... 16 more
> > > > > > > > > 
> > > > > > > > > But the example [Elasticsearch Platform — Find real-time answers at scale | Elastic](http://www.elasticsearch.org/guide/en/)  
> > > > > > > > > elasticsearch/reference/current/analysis-pattern-  
> > > > > > > > > replace-charfilter.html  
> > > > > > > > > is similar to what I wrote. Any clues to write a new analyzer ?
> > > > > > > > > 
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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 6, 2017, 2:02am UTC](https://discuss.elastic.co/t/exception-while-creating-a-custom-analyzer/14711/11 "2017-07-06T02:02:19Z")

</div>