# "error registering plugin" on logstash

**URL:** <https://discuss.elastic.co/t/error-registering-plugin-on-logstash/121744>\
**Category:** Logstash\
**Created:** [February 27, 2018, 10:24pm UTC](https://discuss.elastic.co/t/error-registering-plugin-on-logstash/121744 "2018-02-27T22:24:27Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Jose\_Ramierez](https://avatars.discourse-cdn.com/v4/letter/j/4bbf92/32.png) [@Jose\_Ramierez](https://discuss.elastic.co/u/Jose_Ramierez)\
**Post date:** [February 27, 2018, 10:24pm UTC](https://discuss.elastic.co/t/error-registering-plugin-on-logstash/121744/1 "2018-02-27T22:24:28Z")

</div>

I am chasing a stability problem in logstash and have turned on debug logging in the log4j config found in /etc/logstash/

Running logstash 5.6

We use only a custom tcp listener.

issues spotted:

`[2018-02-27T16:19:21,353][ERROR][logstash.pipeline] Error registering plugin {:plugin=>"#<LogStash::OutputDelegator:0x2725780d @namespaced_metric=#<LogStash::Instrument::NamespacedMetric:0x1ed32d2 @metric=#<LogStash::Instrument::Metric:0x5fb5f6db @collector=#<LogStash::Instrument::Collector:0x50b81dff`

and

`[2018-02-27T16:19:21,358][ERROR][logstash.agent] Pipeline aborted due to error {:exception=>#<NameError: HttpClientBuilder not found in packages org.apache.http.client.methods, org.apache.http.client.entity, org.apache.http.client.config, org.apache.http.config,`

The full log is below.

How to clean up?

> > > > > > > > > > > > > > > > >

[2018-02-27T16:18:27,648][ERROR][logstash.agent] Pipeline aborted due to error {:exception=\>#\<NameError: HttpClientBuilder not found in packages org.apache.http.client.methods, org.apache.http.client.entity, org.apache.http.client.config, org.apache.http.config, org.apache.http.conn.socket, org.apache.http.impl, org.apache.http.impl.client, org.apache.http.impl.conn, org.apache.http.impl.auth, org.apache.http.entity, org.apache.http.message, org.apache.http.params, org.apache.http.protocol, org.apache.http.auth, java.util.concurrent, org.apache.http.client.protocol, org.apache.http.conn.ssl, java.security.cert, java.security.spec, java.security, org.apache.http.client.utils; last error: cannot load Java class org.apache.http.client.utils.HttpClientBuilder\>, :backtrace=\>["file:/usr/share/logstash/vendor/jruby/lib/jruby.jar!/jruby/java/core\_ext/module.rb:45:in `const_missing'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/manticore-0.6.1-java/lib/manticore/client.rb:382:in `client\_builder'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/manticore-0.6.1-java/lib/manticore/client.rb:180:in `initialize'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-output-elasticsearch-7.4.2-java/lib/logstash/outputs/elasticsearch/http_client/manticore_adapter.rb:26:in `initialize'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-output-elasticsearch-7.4.2-java/lib/logstash/outputs/elasticsearch/http\_client.rb:271:in `build_adapter'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-output-elasticsearch-7.4.2-java/lib/logstash/outputs/elasticsearch/http_client.rb:275:in `build\_pool'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-output-elasticsearch-7.4.2-java/lib/logstash/outputs/elasticsearch/http\_client.rb:60:in `initialize'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-output-elasticsearch-7.4.2-java/lib/logstash/outputs/elasticsearch/http_client_builder.rb:101:in `create\_http\_client'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-output-elasticsearch-7.4.2-java/lib/logstash/outputs/elasticsearch/http\_client\_builder.rb:97:in `build'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-output-elasticsearch-7.4.2-java/lib/logstash/outputs/elasticsearch.rb:230:in `build\_client'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-output-elasticsearch-7.4.2-java/lib/logstash/outputs/elasticsearch/common.rb:24:in `register'", "/usr/share/logstash/logstash-core/lib/logstash/output_delegator_strategies/shared.rb:9:in `register'", "/usr/share/logstash/logstash-core/lib/logstash/output\_delegator.rb:43:in `register'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:290:in `register\_plugin'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:301:in `register_plugins'", "org/jruby/RubyArray.java:1613:in `each'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:301:in `register_plugins'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:310:in `start\_workers'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:235:in `run'", "/usr/share/logstash/logstash-core/lib/logstash/agent.rb:408:in `start\_pipeline'"]}  
[2018-02-27T16:18:27,689][INFO][logstash.agent] Successfully started Logstash API endpoint {:port=\>9600}  
[2018-02-27T16:18:30,673][WARN][logstash.agent] stopping pipeline {:id=\>"main"}  
[2018-02-27T16:18:55,454][INFO][logstash.modules.scaffold] Initializing module {:module\_name=\>"netflow", :directory=\>"/usr/share/logstash/modules/netflow/configuration"}  
[2018-02-27T16:18:55,457][INFO][logstash.modules.scaffold] Initializing module {:module\_name=\>"fb\_apache", :directory=\>"/usr/share/logstash/modules/fb\_apache/configuration"}  
[2018-02-27T16:18:55,688][ERROR][logstash.plugins.registry] Problems loading a plugin with {:type=\>"input", :name=\>"tcp", :path=\>"logstash/inputs/tcp", :error\_message=\>"missing class name (`org.logstash.tcp.Decoder')", :error_class=>NameError, :error_backtrace=>["org/jruby/javasupport/JavaUtilities.java:54:in `get\_proxy\_or\_package\_under\_package'", "file:/usr/share/logstash/vendor/jruby/lib/jruby.jar!/jruby/java/java\_package\_module\_template.rb:14:in `method_missing'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-input-tcp-4.2.4-java/lib/logstash/inputs/tcp/decoder_impl.rb:4:in `(root)'", "org/jruby/RubyKernel.java:1040:in `require'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/polyglot-0.3.5/lib/polyglot.rb:65:in `require'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-input-tcp-4.2.4-java/lib/logstash/inputs/tcp.rb:1:in `(root)'", "org/jruby/RubyKernel.java:1040:in `require'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/polyglot-0.3.5/lib/polyglot.rb:65:in `require'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-input-tcp-4.2.4-java/lib/logstash/inputs/tcp.rb:8:in `(root)'", "/usr/share/logstash/logstash-core/lib/logstash/plugins/registry.rb:1:in `(root)'", "/usr/share/logstash/logstash-core/lib/logstash/plugins/registry.rb:156:in `legacy\_lookup'", "/usr/share/logstash/logstash-core/lib/logstash/plugins/registry.rb:138:in `lookup'", "/usr/share/logstash/logstash-core/lib/logstash/plugins/registry.rb:180:in `lookup\_pipeline\_plugin'", "/usr/share/logstash/logstash-core/lib/logstash/plugin.rb:140:in `lookup'", "org/jruby/RubyKernel.java:1079:in `eval'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:103:in `plugin'", "(eval):8:in `initialize'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:75:in `initialize'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:165:in `initialize'", "/usr/share/logstash/logstash-core/lib/logstash/agent.rb:296:in `create_pipeline'", "/usr/share/logstash/logstash-core/lib/logstash/agent.rb:95:in `register\_pipeline'",

... (truncated to fit max post size)

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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:** [March 27, 2018, 10:24pm UTC](https://discuss.elastic.co/t/error-registering-plugin-on-logstash/121744/2 "2018-03-27T22:24:35Z")

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