[FLINK-8830] YarnResourceManager throws NullPointerException

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 1.5.0
• Fix Version/s: 1.5.0
• Component/s: Deployment / YARN
• Assignee: vinoyang
• Reporter: Piotr Nowojski
• Created: 02/Mar/18 08:06
• Updated: 20/Mar/18 09:20
• Resolved: 20/Mar/18 09:20

Description

 

java.lang.NullPointerException
at java.io.File.<init>(File.java:277)
at org.apache.flink.yarn.Utils.createTaskExecutorContext(Utils.java:502)
at org.apache.flink.yarn.YarnResourceManager.createTaskExecutorLaunchContext(YarnResourceManager.java:445)
at org.apache.flink.yarn.YarnResourceManager.onContainersAllocated(YarnResourceManager.java:338)
at org.apache.flink.yarn.YarnResourceManagerTest$1.<init>(YarnResourceManagerTest.java:340)
at org.apache.flink.yarn.YarnResourceManagerTest.testStopWorker(YarnResourceManagerTest.java:317)
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.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:48)
at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
at org.junit.rules.RunRules.evaluate(RunRules.java:20)
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:51)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)

 

This exception is being thrown in `org.apache.flink.yarn.YarnResourceManagerTest#testStopWorker`. Exception apparently is being ignored, since the test completes. It seems like this line:

String fileLocation = System.getenv(UserGroupInformation.HADOOP_TOKEN_FILE_LOCATION)

Is not guarded against returned null value. I don't know if that's a test or production code issue.

CC till.rohrmann

Issue Links

• links to: GitHub Pull Request #5629