[jboss-jira] [JBoss JIRA] (WFLY-13391) getContextClassLoader is null in Managed thread factory

[Dheeraj Joshi (Jira)]

     [ https://issues.redhat.com/browse/WFLY-13391?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dheeraj Joshi updated WFLY-13391:
---------------------------------
    Workaround Description: 
In our code where we are getting class loader, Rather than using context class loader we are trying to get the current objects class loader and setting it to current threads class loader and in finally block resetting the class loader to original value. 


{code:java}
try {
    final ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
    if (classLoader == null) {
          Thread.currentThread().setContextClassLoader(this.getClass().getClassLoader());
    }
    clazz = Class.forName(className, true, classLoader);
} catch (final Exception e) {
    throw new JbpmClassNotFoundException("couldn't load class " + className, e);
} finally {
    Thread.currentThread().setContextClassLoader(classLoader);
}
{code}

We don't know the consequence of this work around to our application. 


  was:
In our code where we are getting class loader, Rather than using context class loader we are trying to get the current objects class loader and setting it to current threads class loader and in finally block resetting the class loader to original value. 


{code:java}
try {
    final ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
    if (classLoader == null) {
        Thread.currentThread().setContextClassLoader(this.getClass().getClassLoader());
    }
    clazz = Class.forName(className, true, classLoader);
} catch (final Exception e) {
    throw new JbpmClassNotFoundException("couldn't load class " + className, e);
} finally {
    Thread.currentThread().setContextClassLoader(classLoader);
}
{code}

We don't know the consequence of this work around to our application. 




> getContextClassLoader is null in Managed thread factory
> -------------------------------------------------------
>
>                 Key: WFLY-13391
>                 URL: https://issues.redhat.com/browse/WFLY-13391
>             Project: WildFly
>          Issue Type: Bug
>          Components: Concurrency Utilities
>    Affects Versions: 18.0.1.Final, 19.0.0.Final
>            Reporter: Dheeraj Joshi
>            Assignee: Eduardo Martins
>            Priority: Major
>         Attachments: WildFly-16-server.log, WildFly-17-server.log, WildFly-18-server.log
>
>
> We are using managed-thread-factory and Threads belong to this do not have context class loader associated with it
> {code:java}
> <managed-thread-factories>
>     <managed-thread-factory name="FlowWorkManagerThreadFactory" jndi-name="java:jboss/ee/concurrency/factory/FlowWorkManagerThreadFactory" context-service="default"/>
> </managed-thread-factories>
> <managed-executor-services>
>     <managed-executor-service
>         name="InteractiveWorkflowWorkManagerExecutorService"
>         jndi-name="java:jboss/ee/concurrency/executor/FLOW_MANAGEDEXECUTOR"
>         core-threads="${threadpool.interactiveWorkflow.minthread}"
>         max-threads="${threadpool.interactiveWorkflow.maxthread}" keepalive-time="5000"
>         queue-length="${threadpool.interactiveWorkflow.queuesize}"
>         thread-factory="FlowWorkManagerThreadFactory"
>         hung-task-threshold="600000" />
> </managed-executor-services>
> {code}
> classLoader variable in below code
> {code:java}
> final ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
> {code}
> evaluates as null when called inside managed thread.
> Same code works fine with {{Wildfly 16}} and {{Wildfly 17.0.1}}
> In 16 and 17.0.1 The class loader is from Service module loader.
> Server logs with {{org.jboss.as.ee}}  in {{TRACE}} level for {{Wildfly 16, 17.0.1 and 18}} are attached.



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