Eric Badger created HDFS-11818:
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Summary: TestBlockManager.testSufficientlyReplBlocksUsesNewRack
fails intermittently
Key: HDFS-11818
URL: https://issues.apache.org/jira/browse/HDFS-11818
Project: Hadoop HDFS
Issue Type: Bug
Reporter: Eric Badger
Saw a weird Mockito failure in last night's build with the following stack
trace:
{noformat}
org.mockito.exceptions.misusing.WrongTypeOfReturnValue:
INodeFile cannot be returned by isRunning()
isRunning() should return boolean
at
org.apache.hadoop.hdfs.server.blockmanagement.TestBlockManager.addBlockOnNodes(TestBlockManager.java:555)
at
org.apache.hadoop.hdfs.server.blockmanagement.TestBlockManager.doTestSufficientlyReplBlocksUsesNewRack(TestBlockManager.java:404)
at
org.apache.hadoop.hdfs.server.blockmanagement.TestBlockManager.testSufficientlyReplBlocksUsesNewRack(TestBlockManager.java:397)
{noformat}
This is pretty confusing since we explicitly set isRunning() to return true in
TestBlockManager's \@Before method
{noformat}
154 Mockito.doReturn(true).when(fsn).isRunning();
{noformat}
Also saw the following exception in the logs:
{noformat}
2017-05-12 05:42:27,903 ERROR blockmanagement.BlockManager
(BlockManager.java:run(2796)) - Error while processing replication queues async
org.mockito.exceptions.base.MockitoException:
'writeLockInterruptibly' is a *void method* and it *cannot* be stubbed with a
*return value*!
Voids are usually stubbed with Throwables:
doThrow(exception).when(mock).someVoidMethod();
If the method you are trying to stub is *overloaded* then make sure you are
calling the right overloaded version.
at
org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.processMisReplicatesAsync(BlockManager.java:2841)
at
org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.access$100(BlockManager.java:120)
at
org.apache.hadoop.hdfs.server.blockmanagement.BlockManager$1.run(BlockManager.java:2792)
{noformat}
This is also weird since we don't do any explicit mocking with
{{writeLockInterruptibly}} via fsn in the test. It has to be something changing
the mocks or non-thread safe access or something like that. I can't explain the
failures otherwise.
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