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From "Hairong Kuang (JIRA)" <j...@apache.org>
Subject [jira] Created: (HDFS-1555) HDFS 20 append: Disallow pipeline recovery if a file is already being lease recovered
Date Wed, 22 Dec 2010 23:35:00 GMT
HDFS 20 append: Disallow pipeline recovery if a file is already being lease recovered
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                 Key: HDFS-1555
                 URL: https://issues.apache.org/jira/browse/HDFS-1555
             Project: Hadoop HDFS
          Issue Type: Improvement
    Affects Versions: 0.20-append
            Reporter: Hairong Kuang
            Assignee: Hairong Kuang
             Fix For: 0.20-append


When a file is under lease recovery and the writer is still alive, the write pipeline will
be killed and then the writer will start a pipeline recovery. Sometimes the pipeline recovery
may race before the lease recovery and as a result fail the lease recovery. This is very bad
if we want to support the strong recoverLease semantics in HDFS-1554. So it would be nice
if we could disallow a file's pipeline recovery while its lease recovery is in progress.

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