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From "Randall Hauch (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (KAFKA-6417) plugin.path pointing at a plugin directory causes ClassNotFoundException
Date Tue, 02 Jan 2018 18:18:03 GMT

    [ https://issues.apache.org/jira/browse/KAFKA-6417?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16308451#comment-16308451
] 

Randall Hauch commented on KAFKA-6417:
--------------------------------------

We should definitely improve the documentation to make this more obvious, but it'd also be
good to detect this situation with the code (e.g., a directory on the {{plugin.path}} that
directly contains JAR files) and at least output a warning if not an error message and possibly
even failing the connector.

> plugin.path pointing at a plugin directory causes ClassNotFoundException
> ------------------------------------------------------------------------
>
>                 Key: KAFKA-6417
>                 URL: https://issues.apache.org/jira/browse/KAFKA-6417
>             Project: Kafka
>          Issue Type: Bug
>          Components: KafkaConnect
>    Affects Versions: 1.0.0
>            Reporter: Dustin Cote
>
> When using the {{plugin.path}} configuration for the Connect workers, the user is expected
to specify a list containing the following per the docs:
> {quote}
> The list should consist of top level directories that include any combination of: a)
directories immediately containing jars with plugins and their dependencies b) uber-jars with
plugins and their dependencies c) directories immediately containing the package directory
structure of classes of plugins and their dependencies 
> {quote}
> This means we would expect {{plugin.path=/usr/share/plugins}} for a structure like {{/usr/share/plugins/myplugin1}},{{/usr/share/plugins/myplugin2}},
etc. However if you specify {{plugin.path=/usr/share/plugins/myplugin1}} the resulting behavior
is that dependencies for {{myplugin1}} are not properly loaded. This causes a {{ClassNotFoundException}}
that is not intuitive to debug. 



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