# Logstash and Lumberjack giving Error

**URL:** <https://discuss.elastic.co/t/logstash-and-lumberjack-giving-error/268044>\
**Category:** Logstash\
**Created:** [March 23, 2021, 5:59am UTC](https://discuss.elastic.co/t/logstash-and-lumberjack-giving-error/268044 "2021-03-23T05:59:52Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![jhanvi](https://avatars.discourse-cdn.com/v4/letter/j/9fc348/32.png) [@jhanvi](https://discuss.elastic.co/u/jhanvi)\
**Post date:** [March 23, 2021, 5:59am UTC](https://discuss.elastic.co/t/logstash-and-lumberjack-giving-error/268044/1 "2021-03-23T05:59:52Z")

</div>

Hello,

I am facing this error quite often and it happens randomly too. My logs seem to be flowing fine and then suddenly it stops and I get the below error.

[ERROR][logstash.outputs.lumberjack][main] All hosts unavailable, sleeping {:hosts=\>["hostname"], :e=\>#\<RuntimeError: Could not connect to any hosts\>, :backtrace=\>["/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/jls-lumberjack-0.0.26/lib/lumberjack/client.rb:31:in `connect'", "/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/jls-lumberjack-0.0.26/lib/lumberjack/client.rb:24:in`initialize'","/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/logstash-output-lumberjack-3.1.7/lib/logstash/outputs/lumberjack.rb:86:in `connect'", "/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/logstash-output-lumberjack-3.1.7/lib/logstash/outputs/lumberjack.rb:69:in `flush'", "/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/stud-0.0.23/lib/stud/buffer.rb:219:in `block in buffer_flush'", "org/jruby/RubyHash.java:1415:in`each'", "/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/stud-0.0.23/lib/stud/buffer.rb:216:in`buffer_flush'", "/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/stud-0.0.23/lib/stud/buffer.rb:159:in`buffer\_receive'", "/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/logstash-output-lumberjack-3.1.7/lib/logstash/outputs/lumberjack.rb:52:in `block in register'", "/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/logstash-codec-json-3.0.5/lib/logstash/codecs/json.rb:42:in`encode'", "/usr/share/logstash/logstash-core/lib/logstash/codecs/delegator.rb:48:in`block in encode'", "org/logstash/instrument/metrics/AbstractSimpleMetricExt.java:65:in`time'", "org/logstash/instrument/metrics/AbstractNamespacedMetricExt.java:64:in`time'", "/usr/share/logstash/logstash-core/lib/logstash/codecs/delegator.rb:47:in`encode'", "/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/logstash-output-lumberjack-3.1.7/lib/logstash/outputs/lumberjack.rb:59:in`receive'", "/usr/share/logstash/logstash-core/lib/logstash/outputs/base.rb:105:in`block in multi\_receive'", "org/jruby/RubyArray.java:1809:in`each'", "/usr/share/logstash/logstash-core/lib/logstash/outputs/base.rb:105:in`multi\_receive'", "org/logstash/config/ir/compiler/OutputStrategyExt.java:143:in `multi_receive'", "org/logstash/config/ir/compiler/AbstractOutputDelegatorExt.java:121:in`multi\_receive'", "/usr/share/logstash/logstash-core/lib/logstash/java\_pipeline.rb:295:in  
`block in start\_workers'"]}

What does this error mean and what could be causing it?

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<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 20, 2021, 6:00am UTC](https://discuss.elastic.co/t/logstash-and-lumberjack-giving-error/268044/2 "2021-04-20T06:00:52Z")

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