Searched on Google with the first line of a JAVA stack trace?

We can recommend more relevant solutions and speed up debugging when you paste your entire stack trace with the exception message. Try a sample exception.

Recommended solutions based on your search

Samebug tips

  1. ,
    Expert tip

    Check your pattern declaration or check your assert declaration.

java.lang.AssertionError: null at org.junit.Assert.fail(Assert.java:86) at org.junit.Assert.assertTrue(Assert.java:41) at org.junit.Assert.assertTrue(Assert.java:52) at com.hazelcast.client.listeners.AbstractListenersOnReconnectTest.testListenersForHeartbeat(AbstractListenersOnReconnectTest.java:252) at com.hazelcast.client.listeners.AbstractListenersOnReconnectTest.testClusterReconnectDueToHeartbeatSmartRouting(AbstractListenersOnReconnectTest.java:335) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:95) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55) at java.lang.reflect.Method.invoke(Method.java:508) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) at com.hazelcast.test.FailOnTimeoutStatement$CallableStatement.call(FailOnTimeoutStatement.java:88) at com.hazelcast.test.FailOnTimeoutStatement$CallableStatement.call(FailOnTimeoutStatement.java:82) at java.util.concurrent.FutureTask.run(FutureTask.java:277) at java.lang.Thread.run(Thread.java:785)