[
https://issues.apache.org/jira/browse/MNG-6836?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17374246#comment-17374246
]
Michael Osipov commented on MNG-6836:
-------------------------------------
Can you provide some realworld numbers?
> Too Many Open Files for large projects
> --------------------------------------
>
> Key: MNG-6836
> URL: https://issues.apache.org/jira/browse/MNG-6836
> Project: Maven
> Issue Type: Bug
> Components: Plugins and Lifecycle
> Affects Versions: 3.5.2, 3.5.3, 3.5.4, 3.6.0, 3.6.1, 3.6.2, 3.6.3
> Reporter: Cody Wayne Holmes
> Priority: Major
>
> This issue seems to be that all plugins classloaders are created and then
> cached, and plugins are internally creating classloaders that are not being
> closed and therefore leaving open file handles to jar files waiting to be
> finalized.
>
> When a project gets big enough with enough modules and plugins than this
> becomes a problem as the project will reach a large number of open jar files
> by the time it completes and if the file system is not set up to allow the
> standard ulimit to be exceeded, then this will cause build failures.
>
> One plugin example that opens and does not close a URLClassloader is the
> [maven-pmd-plugin|#L796]]. As you can see it calls the method to prepend the
> classpath for the plugin to run. This method then [creates|#L196]] a
> URLClassloader that is not closed and must be finalized.
>
> With the deprecation of the finalizer and the knowledge that it is not a good
> mechanism for closing system resources reliably, this also causes issues for
> larger projects with a lot of modules and a slightly larger build time.
>
> I am not sure what can be done about this issue in the maven lifecycle, but
> just wanted to ask the question and find out if anyone else has seen similar
> issues or knows of a way to resolve this open file handles problem. And
> possibly find a way to limit the number of open file handles to the
> downloaded artifacts.
>
> Thanks.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
