# Cannot load mongodb output plugin

**URL:** <https://discuss.elastic.co/t/cannot-load-mongodb-output-plugin/175155>\
**Category:** Logstash\
**Created:** [April 3, 2019, 10:06am UTC](https://discuss.elastic.co/t/cannot-load-mongodb-output-plugin/175155 "2019-04-03T10:06:55Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![winkelwagen](https://avatars.discourse-cdn.com/v4/letter/w/b9bd4f/32.png) [@winkelwagen](https://discuss.elastic.co/u/winkelwagen)\
**Post date:** [April 3, 2019, 10:06am UTC](https://discuss.elastic.co/t/cannot-load-mongodb-output-plugin/175155/1 "2019-04-03T10:06:55Z")

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Hi,

I'm trying to use the mongodb output plugin.

The machine hosts Ubuntu 18.04, and logstash 6.5.4-1 is installed with apt. logstash then runs under the logstash user via systemd.

The plugin is installed with

> /usr/share/logstash/bin$ sudo /usr/share/logstash/bin/logstash-plugin install logstash-output-mongodb  
> Validating logstash-output-mongodb  
> Installing logstash-output-mongodb  
> Installation successful

And a query shows that it has indeed been installed (v3.1.5):

> /usr/share/logstash/bin$ sudo /usr/share/logstash/bin/logstash-plugin list | grep mongodb  
> logstash-output-mongodb

However, I get an error that it cannot load a mongo file. See the error below. It seems to be a JRuby error. How do I fix this?

> [2019-04-03T09:53:10,650][ERROR][logstash.agent] Failed to execute action {:action=\>LogStash::PipelineAction::Create/pipeline\_id:tealium, :exception=\>"LogStash::PluginLoadingError", :message=\>"Couldn't find any output plugin named 'mongodb'. Are you sure this is correct? Trying to load the mongodb output plugin resulted in this error: no such file to load -- mongo", :backtrace=\>["/usr/share/logstash/logstash-core/lib/logstash/plugins/registry.rb:211:in `lookup_pipeline_plugin'", "/usr/share/logstash/logstash-core/lib/logstash/plugin.rb:137:in `lookup'", "org/logstash/plugins/PluginFactoryExt.java:210:in `plugin'", "org/logstash/plugins/PluginFactoryExt.java:166:in `plugin'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:71:in `plugin'", "(eval):13:in `'", "org/jruby/RubyKernel.java:994:in `eval'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:49:in `initialize'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:90:in `initialize'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline_action/create.rb:42:in `block in execute'", "/usr/share/logstash/logstash-core/lib/logstash/agent.rb:92:in `block in exclusive'", "org/jruby/ext/thread/Mutex.java:148:in `synchronize'", "/usr/share/logstash/logstash-core/lib/logstash/agent.rb:92:in `exclusive'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline_action/create.rb:38:in `execute'", "/usr/share/logstash/logstash-core/lib/logstash/agent.rb:317:in `block in converge\_state'"]}

I've tried to install everything with `sudo -u logstash [...] logstash-plugin [...]`, but that's to no avail, as it does not change the error message.

For completeness here's the output part of my config:

> output {  
> mongodb {  
> collection =\> "[...]"  
> database =\> "[...]"  
> uri =\> "mongodb://[..]"  
> }  
> }

I've tried to manually install the gem:

> /usr/share/logstash$ sudo -u logstash bin/ruby -S gem list | grep mongo  
> logstash-output-mongodb (3.1.5)  
> mongo (2.8.0, 2.0.6)

And add these paths to my `/etc/default/logstash`:

> LOGSTASH\_PATH="/usr/share/logstash"  
> LS\_PATH="/usr/share/logstash"

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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:** [May 1, 2019, 10:06am UTC](https://discuss.elastic.co/t/cannot-load-mongodb-output-plugin/175155/2 "2019-05-01T10:06:57Z")

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