# Log4j SocketAppender. Logstash : tcp input --\> OK, log4j input --\> KO - SOLVED

**URL:** <https://discuss.elastic.co/t/log4j-socketappender-logstash-tcp-input-ok-log4j-input-ko-solved/36184>\
**Category:** Logstash\
**Created:** [December 2, 2015, 2:18pm UTC](https://discuss.elastic.co/t/log4j-socketappender-logstash-tcp-input-ok-log4j-input-ko-solved/36184 "2015-12-02T14:18:13Z")\
**Posts on this page:** 2\
**Page:** 2

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**Author:** ![mturonne](https://avatars.discourse-cdn.com/v4/letter/m/f07891/32.png) [@mturonne](https://discuss.elastic.co/u/mturonne)\
**Post date:** [December 21, 2015, 11:14am UTC](https://discuss.elastic.co/t/log4j-socketappender-logstash-tcp-input-ok-log4j-input-ko-solved/36184/21 "2015-12-21T11:14:44Z")

</div>

Guess what... It works !  
I used this [tool](https://code.google.com/p/classfinder/downloads/detail?name=classfinder-v.0.4.1-WIN.rar&can=2&q=) to find the _CordysLogger_ & _Severity_ classes among the hundreds of jar files...  
I found that the managementlib.jar file contains them and I have added the following entry in **_the log4j.rb_** file :

```
def register
    require "java"
    require "jruby/serialization"
    ################### ADDED LINE : ####################
    require "E:\\App\\ELK\\CordysLogger\\managementlib.jar"
    #####################################################

    begin
      Java::OrgApacheLog4jSpi.const_get("LoggingEvent")
    rescue
      raise(LogStash::PluginLoadingError, "Log4j java library not loaded")
    end

```

I am now correctly receiving and de-serializing the received objects.

Thank you **wiibaa** for your precious help on this topic !

---

<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, 5:17am UTC](https://discuss.elastic.co/t/log4j-socketappender-logstash-tcp-input-ok-log4j-input-ko-solved/36184/22 "2017-07-06T05:17:40Z")

</div>

Closed on July 6, 2017, 5:17am UTC



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