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)