[jboss-jira] [JBoss JIRA] (WFLY-4198) NullPointerException when trying to access MDC map with SLF4j+Logback logging

[Sergiy Barlabanov (JIRA)]

Sergiy Barlabanov created WFLY-4198:
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             Summary: NullPointerException when trying to access MDC map with SLF4j+Logback logging
                 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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