# Lumberjack output crashing logstash

**URL:** <https://discuss.elastic.co/t/lumberjack-output-crashing-logstash/34093>\
**Category:** Logstash\
**Created:** [November 7, 2015, 10:53pm UTC](https://discuss.elastic.co/t/lumberjack-output-crashing-logstash/34093 "2015-11-07T22:53:00Z")\
**Posts on this page:** 4\
**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:** [November 7, 2015, 10:53pm UTC](https://discuss.elastic.co/t/lumberjack-output-crashing-logstash/34093/1 "2015-11-07T22:53:00Z")

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hey guys,

I have courier input plugin feeding through to a lumberjack output... I'm trying to use the codec =\> json\_lines in lumberjack, but everytime an event comes in from courier my logstash instance crashes

```
input {
	stdin {}
	courier{
		port => 4546
		transport => "tls"
		ssl_certificate => "path/to/cert.crt"
		ssl_key => "path/to/cert.key"
	}
}
filter {}
output {
	stdout { codec => rubydebug }

	lumberjack {
		host => "remote_host_ip"
		port => 4545
		codec => json_lines {}
	}
}

```

with the following error --

```
LogStash::Json::GeneratorError: Failed to load class 'org.jruby.RubyObject$Access4JacksonDeserializerc66a1575': com.fasterxml.jackson.module.afterburner.ser.BeanPropertyAccessor

```

pipline the logstash instance is fine if an event comes in from stdin. so it must be something to do with the formatting of the courier input.

any thoughts would be much appreciated! thanks

---

<div class="post-metadata">

**Author:** ![suyograo](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/suyograo/32/44898_2.png) [@suyograo](https://discuss.elastic.co/u/suyograo)\
**Post date:** [November 8, 2015, 2:10am UTC](https://discuss.elastic.co/t/lumberjack-output-crashing-logstash/34093/2 "2015-11-08T02:10:32Z")

</div>

Hi, we are aware of this bug (integration with Log Courier) and are working on fixing it.

See: [https://github.com/driskell/log-courier/issues/247](https://github.com/driskell/log-courier/issues/247)  
and [https://github.com/logstash-plugins/logstash-output-elasticsearch/issues/294](https://github.com/logstash-plugins/logstash-output-elasticsearch/issues/294)

---

<div class="post-metadata">

**Author:** ![treehouse](https://avatars.discourse-cdn.com/v4/letter/t/e9a140/32.png) [@treehouse](https://discuss.elastic.co/u/treehouse)\
**Post date:** [November 8, 2015, 9:18am UTC](https://discuss.elastic.co/t/lumberjack-output-crashing-logstash/34093/3 "2015-11-08T09:18:24Z")

</div>

awesome, got it. thanks!

---

<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:** [July 6, 2017, 5:23am UTC](https://discuss.elastic.co/t/lumberjack-output-crashing-logstash/34093/4 "2017-07-06T05:23:28Z")

</div>