[jira] [Created] (RATIS-1211) TestLogAppenderWithSimulatedRpc.testUnlimitedElementBuffer may throw NPE

["Tsz-wo Sze (Jira)" <ji...@apache.org>]

Tsz-wo Sze created RATIS-1211:
---------------------------------

             Summary: TestLogAppenderWithSimulatedRpc.testUnlimitedElementBuffer may throw NPE
                 Key: RATIS-1211
                 URL: https://issues.apache.org/jira/browse/RATIS-1211
             Project: Ratis
          Issue Type: Bug
          Components: server
            Reporter: Tsz-wo Sze
            Assignee: Tsz-wo Sze


It failed quite a few times recently.
{code}
Error:  Tests run: 3, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 12.994 s <<< FAILURE! - in org.apache.ratis.server.simulation.TestLogAppenderWithSimulatedRpc
679
Error:  testUnlimitedElementBuffer(org.apache.ratis.server.simulation.TestLogAppenderWithSimulatedRpc)  Time elapsed: 1.531 s  <<< ERROR!
680
org.apache.ratis.server.raftlog.RaftLogIOException: java.lang.NullPointerException
681
	at org.apache.ratis.server.raftlog.segmented.LogSegment.loadCache(LogSegment.java:342)
682
	at org.apache.ratis.server.raftlog.segmented.SegmentedRaftLog.get(SegmentedRaftLog.java:275)
683
	at org.apache.ratis.RaftTestUtil.countEntries(RaftTestUtil.java:480)
684
	at org.apache.ratis.LogAppenderTests.runTest(LogAppenderTests.java:213)
685
	at org.apache.ratis.server.impl.MiniRaftCluster$Factory$Get.runWithNewCluster(MiniRaftCluster.java:123)
686
	at org.apache.ratis.server.impl.MiniRaftCluster$Factory$Get.runWithNewCluster(MiniRaftCluster.java:111)
687
	at org.apache.ratis.LogAppenderTests.testUnlimitedElementBuffer(LogAppenderTests.java:125)
688
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
689
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
690
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
691
	at java.lang.reflect.Method.invoke(Method.java:498)
692
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
693
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
694
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
695
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
696
	at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
697
	at org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:298)
698
	at org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:292)
699
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
700
	at java.lang.Thread.run(Thread.java:748)
701
Caused by: java.lang.NullPointerException
702
	at java.util.Objects.requireNonNull(Objects.java:203)
703
	at org.apache.ratis.server.raftlog.segmented.LogSegment$LogEntryLoader.load(LogSegment.java:235)
704
	at org.apache.ratis.server.raftlog.segmented.LogSegment.loadCache(LogSegment.java:340)
705
	... 19 more
{code}



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