# Logstash (6.3) not starting anymore with DLQ **URL:** \ **Category:** Logstash\ **Created:** [July 20, 2018, 2:38pm UTC](https://discuss.elastic.co/t/logstash-6-3-not-starting-anymore-with-dlq/140917 "2018-07-20T14:38:11Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![af\_andi](https://avatars.discourse-cdn.com/v4/letter/a/bb73d2/32.png) [@af\_andi](https://discuss.elastic.co/u/af_andi)\ **Post date:** [July 20, 2018, 2:38pm UTC](https://discuss.elastic.co/t/logstash-6-3-not-starting-anymore-with-dlq/140917/1 "2018-07-20T14:38:11Z")
Hi Guys, since i'd upgraded to 6.3 i have a problem with the dead\_letter\_queue on one Logstash host (at the second everything works fine). I just enable the feature in the logstash.yml and leave the other dlq options to their default. I start Logstash and get the following error: ``` [2018-07-20T16:23:29,978][ERROR][logstash.agent] Failed to execute action {:action=>LogStash::PipelineAction::Create/pipeline_id:main, :exception=>"Java::JavaLang::NumberFormatException", :message=>"For input string: \"hs_err_pid34249\"", :backtrace=>["java.lang.NumberFormatException.forInputString(java/lang/NumberFormatException.java:65)", "java.lang.Integer.parseInt(java/lang/Integer.java:580)", "java.lang.Integer.parseInt(java/lang/Integer.java:615)", "java.util.stream.ReferencePipeline$4$1.accept(java/util/stream/ReferencePipeline.java:210)", "java.util.stream.ReferencePipeline$3$1.accept(java/util/stream/ReferencePipeline.java:193)", "java.util.ArrayList$ArrayListSpliterator.forEachRemaining(java/util/ArrayList.java:1382)", "java.util.stream.AbstractPipeline.copyInto(java/util/stream/AbstractPipeline.java:481)", "java.util.stream.AbstractPipeline.wrapAndCopyInto(java/util/stream/AbstractPipeline.java:471)", "java.util.stream.ReduceOps$ReduceOp.evaluateSequential(java/util/stream/ReduceOps.java:708)", "java.util.stream.AbstractPipeline.evaluate(java/util/stream/AbstractPipeline.java:234)", "java.util.stream.IntPipeline.reduce(java/util/stream/IntPipeline.java:461)", "java.util.stream.IntPipeline.max(java/util/stream/IntPipeline.java:424)", "org.logstash.common.io.DeadLetterQueueWriter.(org/logstash/common/io/DeadLetterQueueWriter.java:71)", "org.logstash.common.DeadLetterQueueFactory.newWriter(org/logstash/common/DeadLetterQueueFactory.java:68)", "org.logstash.common.DeadLetterQueueFactory.lambda$getWriter$0(org/logstash/common/DeadLetterQueueFactory.java:59)", "java.util.concurrent.ConcurrentHashMap.computeIfAbsent(java/util/concurrent/ConcurrentHashMap.java:1660)", "org.logstash.common.DeadLetterQueueFactory.getWriter(org/logstash/common/DeadLetterQueueFactory.java:59)", "java.lang.reflect.Method.invoke(java/lang/reflect/Method.java:498)", "org.jruby.javasupport.JavaMethod.invokeDirectWithExceptionHandling(org/jruby/javasupport/JavaMethod.java:423)", "org.jruby.javasupport.JavaMethod.invokeStaticDirect(org/jruby/javasupport/JavaMethod.java:355)", "RUBY.dlq_writer(/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:90)", "RUBY.initialize(/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:60)", "RUBY.initialize(/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:167)", "org.jruby.RubyClass.newInstance(org/jruby/RubyClass.java:1022)", "org.jruby.RubyClass$INVOKER$i$newInstance.call(org/jruby/RubyClass$INVOKER$i$newInstance.gen)", "RUBY.execute(/usr/share/logstash/logstash-core/lib/logstash/pipeline_action/create.rb:40)", "RUBY.block in converge_state(/usr/share/logstash/logstash-core/lib/logstash/agent.rb:305)", "org.jruby.RubyProc.call(org/jruby/RubyProc.java:289)", "org.jruby.RubyProc.call(org/jruby/RubyProc.java:246)", "java.lang.Thread.run(java/lang/Thread.java:748)"]} [2018-07-20T16:23:29,985][INFO][logstash.inputs.metrics] Monitoring License OK [2018-07-20T16:23:30,037][INFO][logstash.agent] Successfully started Logstash API endpoint {:port=>9600} [2018-07-20T16:23:30,184][FATAL][logstash.runner] An unexpected error occurred! {:error=>#`>, :backtrace=>["/usr/share/logstash/logstash-core/lib/logstash/converge_result.rb:27:in `create'", "/usr/share/logstash/logstash-core/lib/logstash/converge_result.rb:67:in `add'", "/usr/share/logstash/logstash-core/lib/logstash/agent.rb:317:in `block in converge_state'"]} [2018-07-20T16:23:30,197][ERROR][org.logstash.Logstash] java.lang.IllegalStateException: Logstash stopped processing because of an error: (SystemExit) exit ``` I already removed and installed the plugin but it doesn't help. As i wrote the other node has no problem and works fine with the same config and version. Has anybody an idea what is going wrong and what can i do? I also don't know at which place Logstash gets "hs\_err\_pid34249" what seems to be the troublemaker. There is no file and no process with the id. ---
**Author:** ![Badger](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/badger/32/25190_2.png) [@Badger](https://discuss.elastic.co/u/Badger)\ **Post date:** [July 20, 2018, 2:41pm UTC](https://discuss.elastic.co/t/logstash-6-3-not-starting-anymore-with-dlq/140917/2 "2018-07-20T14:41:26Z")
Which version of Java? ---
**Author:** ![af\_andi](https://avatars.discourse-cdn.com/v4/letter/a/bb73d2/32.png) [@af\_andi](https://discuss.elastic.co/u/af_andi)\ **Post date:** [July 20, 2018, 2:48pm UTC](https://discuss.elastic.co/t/logstash-6-3-not-starting-anymore-with-dlq/140917/3 "2018-07-20T14:48:23Z")
``` java version "1.8.0_171" Java(TM) SE Runtime Environment (build 1.8.0_171-b11) ``` On both nodes the same version ---
**Author:** ![magnusbaeck](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/magnusbaeck/32/44943_2.png) [@magnusbaeck](https://discuss.elastic.co/u/magnusbaeck)\ **Post date:** [July 20, 2018, 9:18pm UTC](https://discuss.elastic.co/t/logstash-6-3-not-starting-anymore-with-dlq/140917/4 "2018-07-20T21:18:16Z")
Perhaps [https://www.elastic.co/guide/en/logstash/6.3/upgrading-logstash-pqs.html](https://www.elastic.co/guide/en/logstash/6.3/upgrading-logstash-pqs.html)? ---
**Author:** ![af\_andi](https://avatars.discourse-cdn.com/v4/letter/a/bb73d2/32.png) [@af\_andi](https://discuss.elastic.co/u/af_andi)\ **Post date:** [July 26, 2018, 2:33pm UTC](https://discuss.elastic.co/t/logstash-6-3-not-starting-anymore-with-dlq/140917/5 "2018-07-26T14:33:41Z")
No, that's about the persistent queue which isn't active anymore since 6.3, that's ok. The problem still remains, i found an old file at _/var/lib/logstash/plugins/inputs/dead\_letter\_queue/main/_ but after deletion the problem remains ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [August 23, 2018, 2:33pm UTC](https://discuss.elastic.co/t/logstash-6-3-not-starting-anymore-with-dlq/140917/6 "2018-08-23T14:33:43Z")
This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.