# Lumberjack Client write error

**URL:** <https://discuss.elastic.co/t/lumberjack-client-write-error/37479>\
**Category:** Logstash\
**Created:** [December 17, 2015, 2:58pm UTC](https://discuss.elastic.co/t/lumberjack-client-write-error/37479 "2015-12-17T14:58:28Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![treehouse](https://avatars.discourse-cdn.com/v4/letter/t/e9a140/32.png) [@treehouse](https://discuss.elastic.co/u/treehouse)\
**Post date:** [December 17, 2015, 2:58pm UTC](https://discuss.elastic.co/t/lumberjack-client-write-error/37479/1 "2015-12-17T14:58:28Z")

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hey guys

my stack had been working fine until just recently... i have two logstash instances, one accepting courier input which uses the lumberjack output, and one accepting lumberjack input... the first logstash instance all of a sudden started throwing this error and nothing is getting through to the second logstash instance

Connecting to lumberjack server. {:addresses=\>["[elk-stage-esclient-01.ins.us-west-2.i.identityaws.net](http://elk-stage-esclient-01.ins.us-west-2.i.identityaws.net)"], :port=\>4546, :ssl\_certificate=\>"/etc/pki/ca-trust/source/anchors/logstash-stage-esclient.crt", :window\_size=\>nil, :level=\>:info}  
Sending events to lumberjack {:size=\>1, :level=\>:info}  
Client write error, trying connect {:e=\>#\<RuntimeError: Whoa we shouldn't get this frame: \>, :backtrace=\>["/opt/logstash/vendor/bundle/jruby/1.9/gems/jls-lumberjack-0.0.24/lib/lumberjack/client.rb:132:in `ack'", "/opt/logstash/vendor/bundle/jruby/1.9/gems/jls-lumberjack-0.0.24/lib/lumberjack/client.rb:120:in`write\_sync'", "/opt/logstash/vendor/bundle/jruby/1.9/gems/jls-lumberjack-0.0.24/lib/lumberjack/client.rb:41:in `write'", "/opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-output-lumberjack-1.0.2/lib/logstash/outputs/lumberjack.rb:71:in`flush'", "/opt/logstash/vendor/bundle/jruby/1.9/gems/stud-0.0.21/lib/stud/buffer.rb:219:in `buffer_flush'", "org/jruby/RubyHash.java:1341:in`each'", "/opt/logstash/vendor/bundle/jruby/1.9/gems/stud-0.0.21/lib/stud/buffer.rb:216:in `buffer_flush'", "/opt/logstash/vendor/bundle/jruby/1.9/gems/stud-0.0.21/lib/stud/buffer.rb:159:in`buffer\_receive'", "/opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-output-lumberjack-1.0.2/lib/logstash/outputs/lumberjack.rb:54:in `register'", "org/jruby/RubyProc.java:271:in`call'", "/opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-codec-json\_lines-1.0.1/lib/logstash/codecs/json\_lines.rb:45:in `encode'", "/opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-output-lumberjack-1.0.2/lib/logstash/outputs/lumberjack.rb:65:in`receive'", "/opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-core-1.5.4-java/lib/logstash/outputs/base.rb:88:in `handle'", "(eval):56:in`output\_func'", "/opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-core-1.5.4-java/lib/logstash/pipeline.rb:244:in `outputworker'", "/opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-core-1.5.4-java/lib/logstash/pipeline.rb:166:in`start\_outputs'"], :level=\>:error}  
Connecting to lumberjack server. {:addresses=\>["[elk-stage-esclient-01.ins.us-west-2.i.identityaws.net](http://elk-stage-esclient-01.ins.us-west-2.i.identityaws.net)"], :port=\>4546, :ssl\_certificate=\>"/etc/pki/ca-trust/source/anchors/logstash-stage-esclient.crt", :window\_size=\>nil, :level=\>:info}

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**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, 5:18am UTC](https://discuss.elastic.co/t/lumberjack-client-write-error/37479/2 "2017-07-06T05:18:01Z")

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