# Logstash\[ version-1.5.4\] stopped if I insert lumberjack input in configuration

**URL:** <https://discuss.elastic.co/t/logstash-version-1-5-4-stopped-if-i-insert-lumberjack-input-in-configuration/27872>\
**Category:** Logstash\
**Created:** [August 22, 2015, 8:56am UTC](https://discuss.elastic.co/t/logstash-version-1-5-4-stopped-if-i-insert-lumberjack-input-in-configuration/27872 "2015-08-22T08:56:16Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![gugansankar](https://avatars.discourse-cdn.com/v4/letter/g/e274bd/32.png) [@gugansankar](https://discuss.elastic.co/u/gugansankar)\
**Post date:** [August 22, 2015, 8:56am UTC](https://discuss.elastic.co/t/logstash-version-1-5-4-stopped-if-i-insert-lumberjack-input-in-configuration/27872/1 "2015-08-22T08:56:16Z")

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Not sure whether I can post this issue here. as I have posted the same on github.

Problem : When I insert lumberjack configuration in logstash-1.5.4 , its getting stopped with this error message " The error reported is: \n uninitialized constant Concurrent::Delay::Executor". Do anyone have idea on this ?.

> <https://github.com/elastic/logstash/issues/3776>

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**Author:** ![nxhack](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/nxhack/32/3939_2.png) [@nxhack](https://discuss.elastic.co/u/nxhack)\
**Post date:** [August 24, 2015, 2:20am UTC](https://discuss.elastic.co/t/logstash-version-1-5-4-stopped-if-i-insert-lumberjack-input-in-configuration/27872/2 "2015-08-24T02:20:22Z")

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upgrade 1.0.5  
./bin/plugin update logstash-input-lumbjerjack

> <https://github.com/logstash-plugins/logstash-input-lumberjack/pull/45>

  

> <https://github.com/logstash-plugins/logstash-input-lumberjack/issues/46>

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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, 5:31am UTC](https://discuss.elastic.co/t/logstash-version-1-5-4-stopped-if-i-insert-lumberjack-input-in-configuration/27872/3 "2017-07-06T05:31:11Z")

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