# Logstash add custom jars to java class path

**URL:** <https://discuss.elastic.co/t/logstash-add-custom-jars-to-java-class-path/304039>\
**Category:** Logstash\
**Tags:** docker\
**Created:** [May 5, 2022, 1:25pm UTC](https://discuss.elastic.co/t/logstash-add-custom-jars-to-java-class-path/304039 "2022-05-05T13:25:58Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![ayout](https://avatars.discourse-cdn.com/v4/letter/a/f4b2a3/32.png) [@ayout](https://discuss.elastic.co/u/ayout)\
**Post date:** [May 5, 2022, 1:25pm UTC](https://discuss.elastic.co/t/logstash-add-custom-jars-to-java-class-path/304039/1 "2022-05-05T13:25:58Z")

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## how can i just add jars to logstash image ( i need them in order to be able to use custom jdbc driver ,) , when trying to do so the docker runs but fails after 1min . this is the Dockerfile :

COPY ./\*.jar /usr/share/logstash/logstash-core/lib/jars/  
ENTRYPOINT ["/usr/local/bin/docker-entrypoint"]  
.---

im getting errors like:

... 34 more  
[2022-05-05T16:07:50,501][DEBUG][org.reflections.Reflections] could not scan file org/logstash/Rubyfier.class in url jar:file:/usr/share/logstash/logstash-core/lib/jars/logstash-core.jar!/ with scanner SubTypesScanner  
org.reflections.ReflectionsException: could not create class object from file org/logstash/Rubyfier.class  
at org.reflections.scanners.AbstractScanner.scan(AbstractScanner.java:32) ~[reflections-0.9.11.jar:?]  
at org.reflections.Reflections.scan(Reflections.java:253) [reflections-0.9.11.jar:?]  
at org.reflections.Reflections.scan(Reflections.java:202) [reflections-0.9.11.jar:?]  
at org.reflections.Reflections.(Reflections.java:123) [reflections-0.9.11.jar:?]  
at org.logstash.plugins.discovery.PluginRegistry.discoverPlugins(PluginRegistry.java:91) [logstash-core.jar:?]  
at org.logstash.plugins.discovery.PluginRegistry.(PluginRegistry.java:69) [logstash-core.jar:?]  
at org.logstash.plugins.discovery.PluginRegistry.getInstance(PluginRegistry.java:76) [logstash-core.jar:?]  
at org.logstash.plugins.factory.PluginFactoryExt.(PluginFactoryExt.java:86) [logstash-core.jar:?]  
at org.logstash.execution.JavaBasePipelineExt.initialize(JavaBasePipelineExt.java:73) [logstash-core.jar:?]  
at org.logstash.execution.JavaBasePipelineExt$INVOKER$i$1$0$initialize.call(JavaBasePipelineExt$INVOKER$i$1$0$initialize.gen) [jruby.jar:?]  
at org.jruby.internal.runtime.methods.JavaMethod$JavaMethodN.call(JavaMethod.java:837) [jruby.jar:?]  
at org.jruby.ir.runtime.IRRuntimeHelpers.instanceSuper(IRRuntimeHelpers.java:1169) [jruby.jar:?]  
at org.jruby.ir.runtime.IRRuntimeHelpers.instanceSuperSplatArgs(IRRuntimeHelpers.java:1156) [jruby.jar:?]  
at org.jruby.ir.targets.InstanceSuperInvokeSite.invoke(InstanceSuperInvokeSite.java:39)  
[jruby.jar:?]  
at usr.share.logstash.logstash\_minus\_core.lib.logstash.java\_pipeline.RUBY$method$initialize$0(/usr/share/logstash/logstash-core/lib/logstash/java\_pipeline.rb:47) [jruby.jar:?]  
at org.jruby.internal.runtime.methods.CompiledIRMethod.call(CompiledIRMethod.java:80) [jruby.jar:?]

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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:** [June 2, 2022, 1:26pm UTC](https://discuss.elastic.co/t/logstash-add-custom-jars-to-java-class-path/304039/2 "2022-06-02T13:26:35Z")

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