# Best way to debug DeadLetterQueue crashing

**URL:** <https://discuss.elastic.co/t/best-way-to-debug-deadletterqueue-crashing/125635>\
**Category:** Logstash\
**Created:** [March 26, 2018, 3:38pm UTC](https://discuss.elastic.co/t/best-way-to-debug-deadletterqueue-crashing/125635 "2018-03-26T15:38:00Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![smbullet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/smbullet/32/27833_2.png) [@smbullet](https://discuss.elastic.co/u/smbullet)\
**Post date:** [March 26, 2018, 3:38pm UTC](https://discuss.elastic.co/t/best-way-to-debug-deadletterqueue-crashing/125635/1 "2018-03-26T15:38:00Z")

</div>

What's the best way to debug something like this?

```
[2018-03-26T11:30:57,698][ERROR][logstash.pipeline] A plugin had an unrecoverable error. Will restart this plugin.
  Plugin: <LogStash::Inputs::DeadLetterQueue path=>"/home/logstash_user/logstash/data/dead_letter_queue", add_field=>{"original"=>"true"}, id=>"1e7a92ea233ca8d71d4b3d2211fc810e72ab1222-19", enable_metric=>true, codec=><LogStash::Codecs::Plain id=>"plain_82027229-147b-43f7-87fb-7a7e7acb75f6", enable_metric=>true, charset=>"UTF-8">, pipeline_id=>"main", commit_offsets=>true>
  Error:
[2018-03-26T11:30:58,698][ERROR][logstash.pipeline] A plugin had an unrecoverable error. Will restart this plugin.
  Plugin: <LogStash::Inputs::DeadLetterQueue path=>"/home/logstash_user/logstash/data/dead_letter_queue", add_field=>{"original"=>"true"}, id=>"1e7a92ea233ca8d71d4b3d2211fc810e72ab1222-19", enable_metric=>true, codec=><LogStash::Codecs::Plain id=>"plain_82027229-147b-43f7-87fb-7a7e7acb75f6", enable_metric=>true, charset=>"UTF-8">, pipeline_id=>"main", commit_offsets=>true>
  Error:
[2018-03-26T11:30:59,699][ERROR][logstash.pipeline] A plugin had an unrecoverable error. Will restart this plugin.
  Plugin: <LogStash::Inputs::DeadLetterQueue path=>"/home/logstash_user/logstash/data/dead_letter_queue", add_field=>{"original"=>"true"}, id=>"1e7a92ea233ca8d71d4b3d2211fc810e72ab1222-19", enable_metric=>true, codec=><LogStash::Codecs::Plain id=>"plain_82027229-147b-43f7-87fb-7a7e7acb75f6", enable_metric=>true, charset=>"UTF-8">, pipeline_id=>"main", commit_offsets=>true>
  Error:
[2018-03-26T11:31:00,701][ERROR][logstash.pipeline] A plugin had an unrecoverable error. Will restart this plugin.
  Plugin: <LogStash::Inputs::DeadLetterQueue path=>"/home/logstash_user/logstash/data/dead_letter_queue", add_field=>{"original"=>"true"}, id=>"1e7a92ea233ca8d71d4b3d2211fc810e72ab1222-19", enable_metric=>true, codec=><LogStash::Codecs::Plain id=>"plain_82027229-147b-43f7-87fb-7a7e7acb75f6", enable_metric=>true, charset=>"UTF-8">, pipeline_id=>"main", commit_offsets=>true>
  Error:

```

As you can see, the error message isn't very descriptive. This continuously occurs every second indefinitely. Any suggestions?

EDIT: I stumbled upon this: [https://github.com/elastic/logstash/issues/7820](https://github.com/elastic/logstash/issues/7820)  
Seems to be the same issue I'm having. I'm running 5.5.0 so I'll try upgrading to 6.2.3 and see if it fixes itself.

---

<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:** [April 23, 2018, 3:38pm UTC](https://discuss.elastic.co/t/best-way-to-debug-deadletterqueue-crashing/125635/2 "2018-04-23T15:38:46Z")

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