# Cant find installed plugin

**URL:** <https://discuss.elastic.co/t/cant-find-installed-plugin/97098>\
**Category:** Logstash\
**Created:** [August 15, 2017, 12:49pm UTC](https://discuss.elastic.co/t/cant-find-installed-plugin/97098 "2017-08-15T12:49:26Z")\
**Posts on this page:** 9\
**Page:** 1

<div class="post-metadata">

**Author:** ![jaime\_loom](https://avatars.discourse-cdn.com/v4/letter/j/ecccb3/32.png) [@jaime\_loom](https://discuss.elastic.co/u/jaime_loom)\
**Post date:** [August 15, 2017, 12:49pm UTC](https://discuss.elastic.co/t/cant-find-installed-plugin/97098/1 "2017-08-15T12:49:26Z")

</div>

Hi I am creating a new logstash output plugin and I'm trying to test it with logstash 5.5.1  
I install it with `bin/logstash-plugin install path/to/logstash-output-azure-0.1.1.gem`  
the out put is

```auto
Validating /path/to/logstash-output-azure-0.1.1.gem
Installing logstash-output-azure
Installation successful

```

my plugin has this

```ruby
class LogStash::Outputs::LogstashAzureBlobOutput < LogStash::Outputs::Base
  
  config_name "logstash_output_azure"

  config :storage_account_name, valdiate: :string, required: false

  config :storage_access_key, valdiate: :string, required: false

  config :container_name, valdiate: :string, required: false

  config :size_file, validate: :number, default: 1024 * 1024 * 5
  config :time_file, validate: :number, default: 15
  config :restore, validate: :boolean, default: true
  config :temporary_directory, validate: :string, default: File.join(Dir.tmpdir, 'logstash')
  config :prefix, validate: :string, default: ''
  config :upload_queue_size, validate: :number, default: 2 * (Concurrent.processor_count * 0.25).ceil
  config :upload_workers_count, validate: :number, default: (Concurrent.processor_count * 0.5).ceil
  config :rotation_strategy, validate: %w[size_and_time size time], default: 'size_and_time'
  config :tags, :validate => :array, :default => []
  config :encoding, :validate => ["none", "gzip"], :default => "none"

  attr_accessor :storage_account_name, :storage_access_key,:container_name,
    :size_file,:time_file,:restore,:temporary_directory,:prefix,:upload_queue_size,
    :upload_workers_count,:rotation_strategy,:tags,:encoding

```

my config file `config/logstasg.conf`

```auto
output {
    logstash_output_azure {
        storage_account_name => "someaccount"
        container_name => "somename"
        storage_access_key => "somekey"
    
    }
}

```

when i start logstash with `bin/logstash -f config/logstash.conf`  
I get the following errors

```auto
[2017-08-15T15:32:38,631][ERROR][logstash.plugins.registry] Problems loading a plugin with {:type=>"output", :name=>"logstash_output_azure", :path=>"logstash/outputs/logstash_output_azure", :error_message=>"NameError", :error_class=>NameError, :error_backtrace=>["/path/to/Downloads/logstash-5.5.1/logstash-core/lib/logstash/plugins/registry.rb:226:in `namespace_lookup'", "/path/to/Downloads/logstash-5.5.1/logstash-core/lib/logstash/plugins/registry.rb:162:in `legacy_lookup'", "/path/to/Downloads/logstash-5.5.1/logstash-core/lib/logstash/plugins/registry.rb:138:in `lookup'", "/path/to/Downloads/logstash-5.5.1/logstash-core/lib/logstash/plugins/registry.rb:180:in `lookup_pipeline_plugin'", "/path/to/Downloads/logstash-5.5.1/logstash-core/lib/logstash/plugin.rb:140:in `lookup'", "/path/to/Downloads/logstash-5.5.1/logstash-core/lib/logstash/pipeline.rb:100:in `plugin'", "(eval):8:in `initialize'", "org/jruby/RubyKernel.java:1079:in `eval'", "/path/to/Downloads/logstash-5.5.1/logstash-core/lib/logstash/pipeline.rb:72:in `initialize'", "/path/to/Downloads/logstash-5.5.1/logstash-core/lib/logstash/pipeline.rb:156:in `initialize'", "/path/to/Downloads/logstash-5.5.1/logstash-core/lib/logstash/agent.rb:286:in `create_pipeline'", "/path/to/Downloads/logstash-5.5.1/logstash-core/lib/logstash/agent.rb:95:in `register_pipeline'", "/path/to/Downloads/logstash-5.5.1/logstash-core/lib/logstash/runner.rb:314:in `execute'", "/path/to/Downloads/logstash-5.5.1/vendor/bundle/jruby/1.9/gems/clamp-0.6.5/lib/clamp/command.rb:67:in `run'", "/path/to/Downloads/logstash-5.5.1/logstash-core/lib/logstash/runner.rb:209:in `run'", "/path/to/Downloads/logstash-5.5.1/vendor/bundle/jruby/1.9/gems/clamp-0.6.5/lib/clamp/command.rb:132:in `run'", "/path/to/Downloads/logstash-5.5.1/lib/bootstrap/environment.rb:71:in `(root)'"]}
[2017-08-15T15:32:38,649][ERROR][logstash.agent] Cannot create pipeline {:reason=>"Couldn't find any output plugin named 'logstash_output_azure'. Are you sure this is correct? Trying to load the logstash_output_azure output plugin resulted in this error: Problems loading the requested plugin named logstash_output_azure of type output. Error: NameError NameError"}

```

I have checked and the plugin apears to be installed when using `bin/logstash-plugin list`

I don't know why it fails to work

---

<div class="post-metadata">

**Author:** ![rkhapre](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/rkhapre/32/48333_2.png) [@rkhapre](https://discuss.elastic.co/u/rkhapre)\
**Post date:** [August 15, 2017, 12:58pm UTC](https://discuss.elastic.co/t/cant-find-installed-plugin/97098/2 "2017-08-15T12:58:43Z")

</div>

Try this

`bin/logstash-plugin list --verbose`

This Will list installed plugins with version information

---

<div class="post-metadata">

**Author:** ![jaime\_loom](https://avatars.discourse-cdn.com/v4/letter/j/ecccb3/32.png) [@jaime\_loom](https://discuss.elastic.co/u/jaime_loom)\
**Post date:** [August 15, 2017, 1:03pm UTC](https://discuss.elastic.co/t/cant-find-installed-plugin/97098/3 "2017-08-15T13:03:10Z")

</div>

I can see my plugin is installed with the correct version `logstash-output-azure (0.1.1)`  
I think the problem might be with the configuration file

---

<div class="post-metadata">

**Author:** ![jaime\_loom](https://avatars.discourse-cdn.com/v4/letter/j/ecccb3/32.png) [@jaime\_loom](https://discuss.elastic.co/u/jaime_loom)\
**Post date:** [August 15, 2017, 3:03pm UTC](https://discuss.elastic.co/t/cant-find-installed-plugin/97098/4 "2017-08-15T15:03:25Z")

</div>

I think the problem might be related to this  
`Problems loading the plugin with {:type=>"output", :name=>"logstash_output_azure"}`  
that's not hte plugin name that is the `config_name` specified in the gem.  
does the gem name and the config name need to be the same?

---

<div class="post-metadata">

**Author:** ![jordansissel](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jordansissel/32/44957_2.png) [@jordansissel](https://discuss.elastic.co/u/jordansissel)\
**Post date:** [September 5, 2017, 9:34pm UTC](https://discuss.elastic.co/t/cant-find-installed-plugin/97098/5 "2017-09-05T21:34:15Z")

</div>

Plugin loading works a bit like this:

```auto
output {
  logstash_output_azure { ... }
}

```

1. This causes Logstash to ask the internal plugin registry if any `output` plugin exists with the name `logstash_output_azure`.
2. At first, this will not be found, so Logstash will try to look for it.
3. Logstash will try to load a file `logstash/outputs/logstash_output_azure` ([https://github.com/elastic/logstash/blob/v5.5.0/logstash-core/lib/logstash/plugins/registry.rb?utf8=✓#L153-L156](https://github.com/elastic/logstash/blob/v5.5.0/logstash-core/lib/logstash/plugins/registry.rb?utf8=%E2%9C%93#L153-L156))
4. `require` may throw a LoadError if the file is not found, and Logstash ignores this error in the hopes that perhaps this plugin is actually defined elsewhere already.
5. Then it asks the `LogStash::Outputs` namespace for any class with the matching `config_name` ([https://github.com/elastic/logstash/blob/v5.5.0/logstash-core/lib/logstash/plugins/registry.rb?utf8=✓#L217-L228](https://github.com/elastic/logstash/blob/v5.5.0/logstash-core/lib/logstash/plugins/registry.rb?utf8=%E2%9C%93#L217-L228))
6. If no plug is found in the namespace check, we raise NameError.

My guess is that your plugin fails silently at step 4 where Logstash is expecting your plugin to be `logstash/outputs/logstash_output_azure.rb` but fails to load. You can check this in your logstash by editing `logstash-core/lib/logstash/plugins/registry.rb` in the `legacy_lookup` method and printing something in the `rescue LoadError` block.

---

<div class="post-metadata">

**Author:** ![Bruno\_Lerner](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/bruno_lerner/32/22279_2.png) [@Bruno\_Lerner](https://discuss.elastic.co/u/Bruno_Lerner)\
**Post date:** [September 19, 2017, 1:08pm UTC](https://discuss.elastic.co/t/cant-find-installed-plugin/97098/7 "2017-09-19T13:08:24Z")

</div>

Hello, Im working in the same plugin as @jaime_loom as a contributor. And I saw that there was a commit to print more specific error messages ([https://github.com/elastic/logstash/pull/8147/files](https://github.com/elastic/logstash/pull/8147/files)).

And now I can see that it didn't find the plugin on `logstash/outputs/` indeed and threw the `LogStash::PluginLoadingError`. But the question is, why it didn't find? What are we missing ? Something on the conf file? Something with the gemspec? The plugin was validated and installed. should we manually put it somewhere else?

---

<div class="post-metadata">

**Author:** ![Bruno\_Lerner](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/bruno_lerner/32/22279_2.png) [@Bruno\_Lerner](https://discuss.elastic.co/u/Bruno_Lerner)\
**Post date:** [September 19, 2017, 1:23pm UTC](https://discuss.elastic.co/t/cant-find-installed-plugin/97098/8 "2017-09-19T13:23:04Z")

</div>

You can see more details in my post on [https://github.com/elastic/logstash/issues/6834](https://github.com/elastic/logstash/issues/6834)

---

<div class="post-metadata">

**Author:** ![Bruno\_Lerner](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/bruno_lerner/32/22279_2.png) [@Bruno\_Lerner](https://discuss.elastic.co/u/Bruno_Lerner)\
**Post date:** [September 19, 2017, 5:01pm UTC](https://discuss.elastic.co/t/cant-find-installed-plugin/97098/9 "2017-09-19T17:01:19Z")

</div>

nevermind, I found out what was wrong, it was some file name

---

<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:** [October 17, 2017, 5:01pm UTC](https://discuss.elastic.co/t/cant-find-installed-plugin/97098/10 "2017-10-17T17:01:25Z")

</div>

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