Lars Hofhansl created HDFS-3979:
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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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