# Trouble with using Logstash for the first time
**URL:** https://discuss.elastic.co/t/trouble-with-using-logstash-for-the-first-time/40790
**Category:** Logstash
**Created:** [February 2, 2016, 9:51pm UTC](https://discuss.elastic.co/t/trouble-with-using-logstash-for-the-first-time/40790 "2016-02-02T21:51:07Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@hiplerG](https://discuss.elastic.co/u/hiplerG)
#### Post date: [February 2, 2016, 9:51pm UTC](https://discuss.elastic.co/t/trouble-with-using-logstash-for-the-first-time/40790/1 "2016-02-02T21:51:07Z")
Hi
I'm trying to use Logstash for the first time and I'm following the Docs in [https://www.elastic.co/guide/en/logstash/2.1/first-event.html](https://www.elastic.co/guide/en/logstash/2.1/first-event.html)
After installing the latest 2.2 release (on Ubuntu 14.04 with Java \>= 1.8.0\_65 I use the command
bin/logstash -e 'input { stdin { } } output { stdout {} }'
to run a first test. I get the following exceptions
LoadError: load error: jopenssl/load -- java.lang.VerifyError: class org.bouncycastle.asn1.ASN1Primitive overrides final method equals.(Ljava/lang/Object;)Z
require at org/jruby/RubyKernel.java:1040
(root) at /home/swissbib/Downloads/logstash/vendor/bundle/jruby/1.9/gems/jruby-openssl-0.9.13-java/lib/openssl.rb:1
require at org/jruby/RubyKernel.java:1040
(root) at /home/swissbib/Downloads/logstash/vendor/bundle/jruby/1.9/gems/logstash-core-2.2.0-java/lib/logstash/patches/stronger\_openssl\_defaults.rb:1
require at org/jruby/RubyKernel.java:1040
(root) at /home/swissbib/Downloads/logstash/vendor/bundle/jruby/1.9/gems/logstash-core-2.2.0-java/lib/logstash/patches/stronger\_openssl\_defaults.rb:2
require at org/jruby/RubyKernel.java:1040
(root) at /home/swissbib/Downloads/logstash/vendor/bundle/jruby/1.9/gems/logstash-core-2.2.0-java/lib/logstash/patches.rb:1
require at org/jruby/RubyKernel.java:1040
(root) at /home/swissbib/Downloads/logstash/vendor/bundle/jruby/1.9/gems/logstash-core-2.2.0-java/lib/logstash/patches.rb:5
require at org/jruby/RubyKernel.java:1040
(root) at /home/swissbib/Downloads/logstash/lib/bootstrap/environment.rb:66
Same happens with using a simple configuration file as documented in [https://www.elastic.co/guide/en/logstash/2.1/advanced-pipeline.html](https://www.elastic.co/guide/en/logstash/2.1/advanced-pipeline.html)
Any ideas what's going wrong?
Thanks for any hint
Günter
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### Author:  [@hiplerG](https://discuss.elastic.co/u/hiplerG)
#### Post date: [February 3, 2016, 6:11pm UTC](https://discuss.elastic.co/t/trouble-with-using-logstash-for-the-first-time/40790/2 "2016-02-03T18:11:00Z")
I solved the problem by myself. The CLASSPATH variable on my used laptops running on Ubuntu 14.04 referenced a customer jar with additional external jars where a not compatible version of class org.bouncycastle.asn1.ASN1Primitive is used. Unfortunately this was the case on two different devices I used for my first test case with Logstash.
Removing the jar in question from the classpath solved the problem.
While I needed some time to get the trick I saw a lot of other people describing nearly the similar problem. Maybe it would help if you include a note in your documentation.
The exception was thrown when I made my first steps with the tar version of Logstash (running my user shell) and of course didn't appear when I installed the deb package version. But for a newbie on the field of Logstash it's not obvious what might be the problem because I followed the documented steps to be done when Logstash is installed with the tar file.
Günter
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 6, 2017, 5:13am UTC](https://discuss.elastic.co/t/trouble-with-using-logstash-for-the-first-time/40790/3 "2017-07-06T05:13:11Z")