# Analyze with custom analyzer throws JsonGenerationException
**URL:** https://discuss.elastic.co/t/analyze-with-custom-analyzer-throws-jsongenerationexception/170644
**Category:** Elasticsearch
**Created:** [March 3, 2019, 4:05pm UTC](https://discuss.elastic.co/t/analyze-with-custom-analyzer-throws-jsongenerationexception/170644 "2019-03-03T16:05:48Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@mmarie](https://discuss.elastic.co/u/mmarie)
#### Post date: [March 3, 2019, 4:05pm UTC](https://discuss.elastic.co/t/analyze-with-custom-analyzer-throws-jsongenerationexception/170644/1 "2019-03-03T16:05:48Z")
Hi
I have the same problem than the unanswered one [there](https://discuss.elastic.co/t/invoke-java-high-level-rest-client-analyzer-api-issue/161276)
Refering to the doc [Java High Level REST Client](https://www.elastic.co/guide/en/elasticsearch/client/java-rest/6.6/java-rest-high-analyze.html), I built a custom analyzer
```
AnalyzeRequest request = new AnalyzeRequest();
request.text("Some text to analyze");
request.addCharFilter("html_strip");
request.tokenizer("standard");
request.addTokenFilter("lowercase");
```
Though, when I run the anayze
`client.indices().analyze(analyzeRequest, RequestOptions.DEFAULT)`
I get the following exception:
```
Exception in thread "main" com.fasterxml.jackson.core.JsonGenerationException: Can not write a string, expecting field name (context: Object)
at com.fasterxml.jackson.core.JsonGenerator._reportError(JsonGenerator.java:1897)
at com.fasterxml.jackson.core.json.JsonGeneratorImpl._reportCantWriteValueExpectName(JsonGeneratorImpl.java:244)
at com.fasterxml.jackson.core.json.UTF8JsonGenerator._verifyValueWrite(UTF8JsonGenerator.java:1033)
at com.fasterxml.jackson.core.json.UTF8JsonGenerator.writeString(UTF8JsonGenerator.java:442)
at org.elasticsearch.common.xcontent.json.JsonXContentGenerator.writeString(JsonXContentGenerator.java:281)
at org.elasticsearch.common.xcontent.XContentBuilder.value(XContentBuilder.java:660)
at org.elasticsearch.action.admin.indices.analyze.AnalyzeRequest$NameOrDefinition.toXContent(AnalyzeRequest.java:111)
at org.elasticsearch.action.admin.indices.analyze.AnalyzeRequest.toXContent(AnalyzeRequest.java:284)
at org.elasticsearch.common.xcontent.XContentHelper.toXContent(XContentHelper.java:353)
at org.elasticsearch.client.RequestConverters.createEntity(RequestConverters.java:676)
at org.elasticsearch.client.RequestConverters.createEntity(RequestConverters.java:671)
at org.elasticsearch.client.IndicesRequestConverters.analyze(IndicesRequestConverters.java:422)
at org.elasticsearch.client.RestHighLevelClient.internalPerformRequest(RestHighLevelClient.java:1758)
at org.elasticsearch.client.RestHighLevelClient.performRequest(RestHighLevelClient.java:1732)
at org.elasticsearch.client.RestHighLevelClient.performRequestAndParseEntity(RestHighLevelClient.java:1694)
at org.elasticsearch.client.IndicesClient.analyze(IndicesClient.java:1285)
at es.Exploration$.getAnalyzeOnTheFly(Exploration.scala:197)
at es.Exploration$.main(Exploration.scala:238)
at es.Exploration.main(Exploration.scala)
Suppressed: java.lang.IllegalStateException: Failed to close the XContentBuilder
at org.elasticsearch.common.xcontent.XContentBuilder.close(XContentBuilder.java:1002)
at org.elasticsearch.common.xcontent.XContentHelper.toXContent(XContentHelper.java:348)
... 10 more
Caused by: java.io.IOException: Unclosed object or array found
at org.elasticsearch.common.xcontent.json.JsonXContentGenerator.close(JsonXContentGenerator.java:469)
at org.elasticsearch.common.xcontent.XContentBuilder.close(XContentBuilder.java:1000)
... 11 more
```
Everything works well if I use a built-in analyzer.
Thanks in advance for your anwser,
M.
---
### Author:  [@dadoonet](https://discuss.elastic.co/u/dadoonet)
#### Post date: [March 4, 2019, 9:27pm UTC](https://discuss.elastic.co/t/analyze-with-custom-analyzer-throws-jsongenerationexception/170644/2 "2019-03-04T21:27:00Z")
I can totally reproduce it.
I opened
>
Thanks a lot for reporting this!
---
### Author:  [@mmarie](https://discuss.elastic.co/u/mmarie)
#### Post date: [March 13, 2019, 7:52am UTC](https://discuss.elastic.co/t/analyze-with-custom-analyzer-throws-jsongenerationexception/170644/3 "2019-03-13T07:52:17Z")
You'r welcome!
For thoses interested by analyse on the fly, I overcomed the current limitation using an analyzer defined in an index I first put in ES with the custom analyzer I needed.
This as proposed in the same doc section.
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [April 10, 2019, 7:52am UTC](https://discuss.elastic.co/t/analyze-with-custom-analyzer-throws-jsongenerationexception/170644/4 "2019-04-10T07:52:34Z")
This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.