# NameError, missing class name com.ibm.mq.jms.MQQueueConnectionFactory

**URL:** <https://discuss.elastic.co/t/nameerror-missing-class-name-com-ibm-mq-jms-mqqueueconnectionfactory/334784>\
**Category:** Logstash\
**Created:** [May 31, 2023, 10:17am UTC](https://discuss.elastic.co/t/nameerror-missing-class-name-com-ibm-mq-jms-mqqueueconnectionfactory/334784 "2023-05-31T10:17:52Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![paulov](https://avatars.discourse-cdn.com/v4/letter/p/df788c/32.png) [@paulov](https://discuss.elastic.co/u/paulov)\
**Post date:** [May 31, 2023, 10:17am UTC](https://discuss.elastic.co/t/nameerror-missing-class-name-com-ibm-mq-jms-mqqueueconnectionfactory/334784/1 "2023-05-31T10:17:52Z")

</div>

Hello,

I have a JMS plugin configuration with purpose of connecting to IBM MQ. After starting the pipeline I get:

```auto
> 
> [WARN] 2023-05-31 10:38:14.348 [[main]<jms] jms - JMS Consumer Died {:exception=>"NameError", 
> :exception_message=>"missing class name (`com.ibm.mq.jms.MQQueueConnectionFactory')", 
> :backtrace=>["org/jruby/javasupport/JavaPackage.java:252:in `method_missing'", 
> "(eval):1:in `initialize'", "org/jruby/RubyKernel.java:1048:in `eval'", 
> "/u01/logstash/vendor/bundle/jruby/2.5.0/gems/jruby-jms-1.3.0-java/lib/jms/connection.rb:167:in `initialize'", 
> "/u01/logstash/vendor/bundle/jruby/2.5.0/gems/logstash-input-jms-3.1.2-java/lib/logstash/inputs/jms.rb:225:in `run'", 
> "/u01/logstash/logstash-core/lib/logstash/java_pipeline.rb:409:in `inputworker'", 
> "/u01/logstash/logstash-core/lib/logstash/java_pipeline.rb:400:in `block in start_input'"]}

```

In the config I have included a reference to the correct jar's (I believe):

```auto
input {
  jms {
    ...
    factory => 'com.ibm.mq.jms.MQQueueConnectionFactory'
    pub_sub => false
   ...
    require_jars => ['/u01/logstash/logstash-core/lib/jars/javax.jms.jar',
                     '/u01/logstash/logstash-core/lib/jars/java-json.jar',
                     '/u01/logstash/logstash-core/lib/jars/com.ibm.mqjms.jar',
                     '/u01/logstash/logstash-core/lib/jars/com.ibm.mq.allclient-9.3.2.0.jar'
                    ]

    ...
}

```

In short: the missing class name IS present in the com.ibm.mq.allclient-9.3.2.0.jar but logstash complains about it missing. If I remove that jar, I get "class def not found" but if I have the jar added I get the above error.

What do I overlook?

---

<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 28, 2023, 10:18am UTC](https://discuss.elastic.co/t/nameerror-missing-class-name-com-ibm-mq-jms-mqqueueconnectionfactory/334784/2 "2023-06-28T10:18:05Z")

</div>

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