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  1. Hadoop HDFS
  2. HDFS-11363

Need more diagnosis info when seeing Slow waitForAckedSeqno

    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 2.9.0, 3.0.0-alpha4
    • Component/s: None
    • Labels:
    • Target Version/s:
    • Hadoop Flags:
      Reviewed

      Description

      When client writes a file, it may get the following message when ACK doesn't get back in a timely manner:

      WARN hdfs.DFSClient: Slow waitForAckedSeqno took 39264ms (threshold=30000ms)

      It would be nice to tell what file it's writing, and what DataNodes are in the pipeline, together with this message, to facilitate investigating related performance issue.

        Attachments

        1. HDFS-11363.03.patch
          1.0 kB
          Xiao Chen
        2. HDFS-11363.02.patch
          1.0 kB
          Xiao Chen
        3. HDFS-11363.01.patch
          1.0 kB
          Xiao Chen

          Activity

            People

            • Assignee:
              xiaochen Xiao Chen
              Reporter:
              yzhangal Yongjun Zhang
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              Dates

              • Created:
                Updated:
                Resolved: