Chesnay Schepler created FLINK-4100:
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Summary: RocksDBStateBackend#close() can throw NPE
Key: FLINK-4100
URL: https://issues.apache.org/jira/browse/FLINK-4100
Project: Flink
Issue Type: Bug
Components: State Backends, Checkpointing, Tests
Affects Versions: 1.1.0
Reporter: Chesnay Schepler
When running the RocksDBStateBackendTest on Windows i ran into an NPE. The
tests are aborted in the @Before checkOperatingSystem method (which is correct
behaviour), but the test still calls dispose() in @After teardown().
This lead to an NPE since the lock object used is null; it was not initialized
since initializeForJob() was never called and there is no null check.
{code}
testCopyDefaultValue(org.apache.flink.contrib.streaming.state.RocksDBStateBackendTest)
Time elapsed: 0 sec <<< ERROR!
java.lang.NullPointerException: null
at
org.apache.flink.contrib.streaming.state.RocksDBStateBackend.dispose(RocksDBStateBackend.java:318)
at
org.apache.flink.runtime.state.StateBackendTestBase.teardown(StateBackendTestBase.java:71)
at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
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:47)
at
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
at
org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:33)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
at
org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:283)
at
org.apache.maven.surefire.junit4.JUnit4Provider.executeWithRerun(JUnit4Provider.java:173)
at
org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:153)
at
org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:128)
at
org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:203)
at
org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:155)
at
org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:103)
{code}
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