[RATIS-1211] Fix TestLogAppenderWithSimulatedRpc.testUnlimitedElementBuffer throw NPE

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Component/s: server
• Assignee: runzhiwang
• Reporter: Tsz-wo Sze
• Created: 07/Dec/20 00:35
• Updated: 07/Dec/20 12:01
• Resolved: 07/Dec/20 12:01

Description

It failed quite a few times recently.

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!
org.apache.ratis.server.raftlog.RaftLogIOException: java.lang.NullPointerException
	at org.apache.ratis.server.raftlog.segmented.LogSegment.loadCache(LogSegment.java:342)
	at org.apache.ratis.server.raftlog.segmented.SegmentedRaftLog.get(SegmentedRaftLog.java:275)
	at org.apache.ratis.RaftTestUtil.countEntries(RaftTestUtil.java:480)
	at org.apache.ratis.LogAppenderTests.runTest(LogAppenderTests.java:213)
	at org.apache.ratis.server.impl.MiniRaftCluster$Factory$Get.runWithNewCluster(MiniRaftCluster.java:123)
	at org.apache.ratis.server.impl.MiniRaftCluster$Factory$Get.runWithNewCluster(MiniRaftCluster.java:111)
	at org.apache.ratis.LogAppenderTests.testUnlimitedElementBuffer(LogAppenderTests.java:125)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
	at org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:298)
	at org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:292)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NullPointerException
	at java.util.Objects.requireNonNull(Objects.java:203)
	at org.apache.ratis.server.raftlog.segmented.LogSegment$LogEntryLoader.load(LogSegment.java:235)
	at org.apache.ratis.server.raftlog.segmented.LogSegment.loadCache(LogSegment.java:340)
	... 19 more

Issue Links

• links to: GitHub Pull Request #332