[
https://issues.apache.org/jira/browse/CAMEL-17588?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17505207#comment-17505207
]
Claus Ibsen commented on CAMEL-17588:
-------------------------------------
Hi
Yeah Bjorn you are on to something, when you have many threads that are not
long lived - then the thread locals internal array can grow (however they are
weak referenced so they should be nulled over time) - and the JVM will
automatic expunge stale entries (see the JDK source).
But to be a good citizen then I think we can look at using a different pooling,
see linked ticket created.
> Missing Clean-Up for DefaultReactiveExecutor.Worker-ThreadLocals
> ----------------------------------------------------------------
>
> Key: CAMEL-17588
> URL: https://issues.apache.org/jira/browse/CAMEL-17588
> Project: Camel
> Issue Type: Bug
> Components: camel-core
> Affects Versions: 3.14.1
> Reporter: Björn Ohm
> Priority: Minor
> Fix For: 3.17.0
>
> Attachments: catalina.out, plain-camel.zip, workers-threadLocals.PNG
>
>
> We are running a Camel-Application on a Tomcat. While the Tomcat-Shutdown we
> observed a bunch of Thread-Local-WARNINGS in the catalina.out like:
> {code:java}
> 02-Feb-2022 01:31:23.810 SCHWERWIEGEND [main]
> org.apache.catalina.loader.WebappClassLoaderBase.checkThreadLocalMapForLeaks
> The web application [provinzial-integration-intern] created a ThreadLocal
> with key of type [java.lang.ThreadLocal.SuppliedThreadLocal] (value
> [java.lang.ThreadLocal$SuppliedThreadLocal@4a4357f5]) and a value of type
> [org.apache.camel.impl.engine.DefaultReactiveExecutor.Worker] (value
> [org.apache.camel.impl.engine.DefaultReactiveExecutor$Worker@76e66f23]) but
> failed to remove it when the web application was stopped. Threads are going
> to be renewed over time to try and avoid a probable memory leak.{code}
> Obviously this belongs to the ThreadLocals used in
> {_}org.apache.camel.impl.engine.DefaultReactiveExecutor{_}.
> In the worst case, this can lead to memory problems.
> The ThreadLocals should be cleaned up.
--
This message was sent by Atlassian Jira
(v8.20.1#820001)
