Kihwal Lee created HDFS-6622:
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Summary: Rename and AddBlock may race and produce invalid edits
Key: HDFS-6622
URL: https://issues.apache.org/jira/browse/HDFS-6622
Project: Hadoop HDFS
Issue Type: Bug
Affects Versions: 2.5.0
Reporter: Kihwal Lee
Priority: Blocker
While investigating HDFS-6681, we have discovered that rename happening in the
middle of {{getAdditionalBlock()}} can lead to logging of invalid edit entry.
In {{getAdditionalBlock()}} , the path is resolved once while holding the read
lock and the same resolved path will be used in the edit log in the second half
of the method holding the write lock. If a rename happens in between two
locks, the path may no longer exist.
When replaying the {{AddBlockOp}}, it will fail with FileNotFound.
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