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From "Kihwal Lee (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-4495) Allow client-side lease renewal to be retried beyond soft-limit
Date Wed, 13 Feb 2013 03:49:12 GMT
Kihwal Lee created HDFS-4495:
--------------------------------

             Summary: Allow client-side lease renewal to be retried beyond soft-limit
                 Key: HDFS-4495
                 URL: https://issues.apache.org/jira/browse/HDFS-4495
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: hdfs-client
    Affects Versions: 0.23.5, 2.0.3-alpha
            Reporter: Kihwal Lee


The current lease renewal code in DFSClient gives up after several retries, if the soft limit
exceeds. This causes the client to abort.  Without this self destruction behavior, lease renewal
can be retried infinitely due to unrelated low-level issue and prevent DFSClient and associated
Connection from getting garbage collected.  

However, giving up at passage of the soft limit has been shown to be too fragile; A long GC
on namenode or transient network outage can make clients fail. We need the self-destruct behavior,
but clients should be allowed to retry for longer period of time.

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