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Posted to hdfs-dev@hadoop.apache.org by "Lars Hofhansl (JIRA)" <ji...@apache.org> on 2012/09/26 06:54:07 UTC

[jira] [Created] (HDFS-3979) Fix hsync and hflush semantics.

Lars Hofhansl created HDFS-3979:
-----------------------------------

             Summary: Fix hsync and hflush semantics.
                 Key: HDFS-3979
                 URL: https://issues.apache.org/jira/browse/HDFS-3979
             Project: Hadoop HDFS
          Issue Type: Bug
            Reporter: Lars Hofhansl


See discussion in HDFS-744. The actual sync/flush operation in BlockReceiver is not on a synchronous path from the DFSClient, hence it is possible that DN loses data that is has already acknowledged as persisted to a client.

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