Zuoming Zhang created MAPREDUCE-7111:
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Summary: TestNameNodeMetrics fails on Windows
Key: MAPREDUCE-7111
URL: https://issues.apache.org/jira/browse/MAPREDUCE-7111
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: test
Affects Versions: 2.9.1, 3.1.0
Reporter: Zuoming Zhang
Assignee: Zuoming Zhang
Fix For: 2.9.1, 3.1.0
_TestNameNodeMetrics_ fails on Windows
Problem:
This is because in _testVolumeFailures_, it tries to call
_DataNodeTestUtils.injectDataDirFailure_ on a volume folder. What
_injectDataDirFailure_ does is actually modifying the folder name from
_volume_name_ to _volume_name_._origin_ and create a new file named as
_volume_name_. Inside the folder, it has two things: 1. a directory named as
"_current_", 2. a file named as "_in_use.lock_". Windows behaves different from
Linux when renaming the parent folder of a locked file. Windows prevent you
from renaming while Linux allows.
Fix:
So in order to inject data failure on to the volume. Instead of renaming the
volume folder itself. Rename the folder inside it which doesn't hold a lock.
Since the folder inside the volume is "_current_". Then we only need to inject
data failure to _volume_name/current_.
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