[jboss-jira] [JBoss JIRA] (WFLY-4198) NullPointerException in LogDiagnosticContextRecoveryInterceptor when calling an asynchronous EJB

[Sergiy Barlabanov (JIRA)]

    [ https://issues.jboss.org/browse/WFLY-4198?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13029366#comment-13029366 ] 

Sergiy Barlabanov commented on WFLY-4198:
-----------------------------------------

Did some investigation: 
The problem has nothing to do with slf4j & logback. When calling an async EJB there is only jboss logging in play. And AbstractMdcLoggerProvider#getMdcMap returns null, which causes LogDiagnosticContextRecoveryInterceptor#processInvocation to fail.

> NullPointerException in LogDiagnosticContextRecoveryInterceptor when calling an asynchronous EJB
> ------------------------------------------------------------------------------------------------
>
>                 Key: WFLY-4198
>                 URL: https://issues.jboss.org/browse/WFLY-4198
>             Project: WildFly
>          Issue Type: Feature Request
>          Components: EJB
>    Affects Versions: 8.2.0.Final
>            Reporter: Sergiy Barlabanov
>            Assignee: David Lloyd
>
> When trying to call an asynchronous EJB in a Web application using slf4j (1.7.5+) & logback(1.0.13+) for logging the following NullPointerException occurs (see below).
> The problem is in the line 67 of LogDiagnosticContextRecoveryInterceptor class, when it tries to access MDC map, which is null. According to SLF4J API the copy of MDC map may be null: see the javadoc of org.slf4j.MDC#getCopyOfContextMap.
> So LogDiagnosticContextRecoveryInterceptor or org.jboss.logging.Slf4jLoggerProvider have to check the map for null.
> Currently there is no workaround for that :(.
> Caused by: java.lang.NullPointerException
> 	at org.jboss.as.ejb3.component.interceptors.LogDiagnosticContextRecoveryInterceptor.processInvocation(LogDiagnosticContextRecoveryInterceptor.java:67)
> 	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:309)
> 	at org.jboss.as.ejb3.component.interceptors.AsyncFutureInterceptorFactory$1$2.runInvocation(AsyncFutureInterceptorFactory.java:97)
> 	at org.jboss.as.ejb3.component.interceptors.AsyncInvocationTask.run(AsyncInvocationTask.java:73)
> 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> 	at java.lang.Thread.run(Thread.java:744)
> 	at org.jboss.threads.JBossThread.run(JBossThread.java:122)



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