FAQ
0.20: DNs should interrupt writers at start of recovery
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Key: HDFS-1186
URL: https://issues.apache.org/jira/browse/HDFS-1186
Project: Hadoop HDFS
Issue Type: Bug
Components: data-node
Affects Versions: 0.20-append
Reporter: Todd Lipcon
Assignee: Todd Lipcon
Priority: Blocker


When block recovery starts (eg due to NN recovering lease) it needs to interrupt any writers currently writing to those blocks. Otherwise, an old writer (who hasn't realized he lost his lease) can continue to write+sync to the blocks, and thus recovery ends up truncating data that has been sync()ed.

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postedJun 3, '10 at 8:04p
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