Details
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Bug
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Status: Resolved
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Minor
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Resolution: Fixed
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None
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None
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None
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Reviewed
Description
when run only a UT of TestBlockManager#testOneOfTwoRacksDecommissioned(), it will fail and throw NullPointerException.
Since NameNode#metrics is static variableļ¼run all uts in TestBlockManager and other ut has init metrics.
But that it runs only testOneOfTwoRacksDecommissioned without initialing metrics throws NullPointerException.
java.lang.NullPointerException at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.addBlock(BlockManager.java:4088) at org.apache.hadoop.hdfs.server.blockmanagement.TestBlockManager.fulfillPipeline(TestBlockManager.java:518) at org.apache.hadoop.hdfs.server.blockmanagement.TestBlockManager.doTestOneOfTwoRacksDecommissioned(TestBlockManager.java:388) at org.apache.hadoop.hdfs.server.blockmanagement.TestBlockManager.testOneOfTwoRacksDecommissioned(TestBlockManager.java:353) 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.RunBefores.evaluate(RunBefores.java:26) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.junit.runner.JUnitCore.run(JUnitCore.java:137) at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68) at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47) at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242) at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
And testAllNodesHoldingReplicasDecommissioned , testTwoOfThreeNodesDecommissioned , testSufficientlyReplBlocksUsesNewRack also have the same problem.