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https://issues.apache.org/jira/browse/CAMEL-17712?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Claus Ibsen resolved CAMEL-17712.
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Resolution: Fixed
> Memory leak in DefaultCamelContext reported by Tomcat 10
> --------------------------------------------------------
>
> Key: CAMEL-17712
> URL: https://issues.apache.org/jira/browse/CAMEL-17712
> Project: Camel
> Issue Type: Bug
> Components: camel-core-engine
> Affects Versions: 3.14.1
> Environment: Apache Camel 3.14.1
> Tomcat 10
> Java 17
> Reporter: Thomas Hoffmann
> Assignee: Claus Ibsen
> Priority: Minor
> Fix For: 3.14.2, 3.11.6, 3.16.0
>
>
> Hello,
> we are using Camel inside a Tomcat application. The application also supports
> reloading of the context.
> Unfortunately, we are getting a memory leak report, e.g.
> {code:java}
> [Catalina-utility-1]
> org.apache.catalina.loader.WebappClassLoaderBase.checkThreadLocalMapForLeaks
> The web application [ROOT] created a ThreadLocal with key of type
> [java.lang.ThreadLocal.SuppliedThreadLocal] (value
> [java.lang.ThreadLocal$SuppliedThreadLocal@588bee00]) and a value of type
> [org.apache.camel.impl.DefaultCamelContext.OptionHolder] (value
> [org.apache.camel.impl.DefaultCamelContext$OptionHolder@1d5c4495]) 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}
>
> Looking at the code, the problem is within the java class DefaultCamelContext
> [https://github.com/apache/camel/blob/main/core/camel-core-engine/src/main/java/org/apache/camel/impl/DefaultCamelContext.java]
> It contains a class variable which is always instantiated with:
> ThreadLocal<OptionHolder> OPTIONS =
> ThreadLocal.withInitial(OptionHolder::new);
> This ThreadLocal is never cleaned up by OPTIONS.remove(), This should be
> added to the shutdown() or stop() handler maybe(?)
> Some additional null checks would have to be implemented as well to make it
> safe.
>
> Thanks,
> Thomas
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