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  1. Hadoop HDFS
  2. HDFS-6231

DFSClient hangs infinitely if using hedged reads and all eligible datanodes die.

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 2.4.0, 3.0.0-alpha1
    • Fix Version/s: 2.4.1
    • Component/s: hdfs-client
    • Labels:
      None
    • Target Version/s:
    • Hadoop Flags:
      Reviewed

      Description

      When using hedged reads, and all eligible datanodes for the read get flagged as dead or ignored, then the client is supposed to refetch block locations from the NameNode to retry the read. Instead, we've seen that the client can hang indefinitely.

        Attachments

        1. HDFS-6231.1.patch
          4 kB
          Chris Nauroth

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              • Assignee:
                cnauroth Chris Nauroth
                Reporter:
                cnauroth Chris Nauroth
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                • Created:
                  Updated:
                  Resolved: