# Logstach Aggregate Plugin installed, but cannot be found

**URL:** <https://discuss.elastic.co/t/logstach-aggregate-plugin-installed-but-cannot-be-found/122641>\
**Category:** Logstash\
**Created:** [March 6, 2018, 6:20am UTC](https://discuss.elastic.co/t/logstach-aggregate-plugin-installed-but-cannot-be-found/122641 "2018-03-06T06:20:42Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![sara\_noori\_hekmat](https://avatars.discourse-cdn.com/v4/letter/s/c89c15/32.png) [@sara\_noori\_hekmat](https://discuss.elastic.co/u/sara_noori_hekmat)\
**Post date:** [March 6, 2018, 6:20am UTC](https://discuss.elastic.co/t/logstach-aggregate-plugin-installed-but-cannot-be-found/122641/1 "2018-03-06T06:20:42Z")

</div>

Hi,

I installed aggregate filter plugin (using offline-packed) and now I can see it in the list of installed plugins:

# /usr/share/logstash/bin/logstash-plugin list --verbose

logstash-codec-cef (4.1.4)  
logstash-codec-collectd (3.0.7)  
logstash-codec-dots (3.0.5)  
logstash-codec-edn (3.0.5)  
logstash-codec-edn\_lines (3.0.5)  
logstash-codec-es\_bulk (3.0.5)  
logstash-codec-fluent (3.1.3)  
logstash-codec-graphite (3.0.4)  
logstash-codec-json (3.0.4)  
logstash-codec-json\_lines (3.0.4)  
logstash-codec-line (3.0.4)  
logstash-codec-msgpack (3.0.5)  
logstash-codec-multiline (3.0.7)  
logstash-codec-netflow (3.5.2)  
logstash-codec-plain (3.0.4)  
logstash-codec-rubydebug (3.0.4)  
logstash-filter-aggregate (2.7.2)  
logstash-filter-cidr (3.1.1)  
logstash-filter-clone (3.0.4)  
...

And this is part of my config file using the plugin:  
if [processing\_state] == "Begin" {  
aggregate {  
task\_id =\> "%{Card}"  
code =\> "map['session\_time'] = 0"  
map\_action =\> "create"  
}  
}  
if [processing\_state] == "Time" {  
ruby {  
code =\> "event.set('server\_time', event.get('end').to\_i - event.get('start').to\_i)"  
}

```
			aggregate {
					task_id => "%{Card}"
					code => "map['session_time'] += event.get('server_time')"
					map_action => "update"
			}
	}
	if [processing_state] == "End" {
			aggregate {
					task_id => "%{Card}"
					code => "event.set('session_time', map['session_time'])"
					map_action => "update"
					end_of_task => true
			}
	}

```

But when I run logstash, I get this error in the log:

[2018-03-06T17:15:38,338][ERROR][logstash.plugins.registry] Problems loading a plugin with {:type=\>"filter", :name=\>"aggregate", :path=\>"logstash/filters/aggregate", :error\_message=\>"NameError", :error\_class=\>NameError, :error\_backtrace=\>["/usr/share/logstash/logstash-core/lib/logstash/plugins/registry.rb:226:in `namespace_lookup'", "/usr/share/logstash/logstash-core/lib/logstash/plugins/registry.rb:162:in`legacy\_lookup'", "/usr/share/logstash/logstash-core/lib/logstash/plugins/registry.rb:138:in `lookup'", "/usr/share/logstash/logstash-core/lib/logstash/plugins/registry.rb:180:in`lookup\_pipeline\_plugin'", "/usr/share/logstash/logstash-core/lib/logstash/plugin.rb:140:in `lookup'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:103:in`plugin'", "(eval):374:in `initialize'", "org/jruby/RubyKernel.java:1079:in`eval'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:75:in `initialize'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:165:in`initialize'", "/usr/share/logstash/logstash-core/lib/logstash/agent.rb:286:in `create_pipeline'", "/usr/share/logstash/logstash-core/lib/logstash/agent.rb:95:in`register\_pipeline'", "/usr/share/logstash/logstash-core/lib/logstash/runner.rb:313:in `execute'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/clamp-0.6.5/lib/clamp/command.rb:67:in`run'", "/usr/share/logstash/logstash-core/lib/logstash/runner.rb:204:in `run'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/clamp-0.6.5/lib/clamp/command.rb:132:in`run'", "/usr/share/logstash/lib/bootstrap/environment.rb:71:in `(root)'"]}  
[2018-03-06T17:15:38,344][ERROR][logstash.agent] Cannot create pipeline {:reason=\>"Couldn't find any filter plugin named 'aggregate'. Are you sure this is correct? Trying to load the aggregate filter plugin resulted in this error: Problems loading the requested plugin named aggregate of type filter. Error: NameError NameError"}

It seems that logstash cannot find the plugin while it can shows it in the list of installed plugins. Can you please advise what is the issue? Do I need to add the plugin name manually in some config/registry file?

Regards,  
Sara

---

<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 3, 2018, 6:20am UTC](https://discuss.elastic.co/t/logstach-aggregate-plugin-installed-but-cannot-be-found/122641/2 "2018-04-03T06:20:47Z")

</div>

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