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  1. Hadoop HDFS
  2. HDFS-8821

Explain message "Operation category X is not supported in state standby"

    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Minor
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 2.8.0, 3.0.0-alpha1
    • Component/s: None
    • Labels:
      None
    • Hadoop Flags:
      Reviewed

      Description

      There is one message specifically that causes many users to question the health of their HDFS cluster, namely "Operation category READ/WRITE is not supported in state standby".

      HDFS-3447 is an attempt to lower the logging severity for StandbyException related messages but it is not resolved yet. So this jira is an attempt to explain this particular message so it appears less scary.

      The text is question 3.17 in the Hadoop Wiki FAQ
      ref: https://wiki.apache.org/hadoop/FAQ#What_does_the_message_.22Operation_category_READ.2FWRITE_is_not_supported_in_state_standby.22_mean.3F

        Attachments

        1. HDFS-8821-1.patch
          0.9 kB
          Gautam Gopalakrishnan
        2. HDFS-8821-2.patch
          0.8 kB
          Gautam Gopalakrishnan

          Activity

            People

            • Assignee:
              ggop Gautam Gopalakrishnan
              Reporter:
              ggop Gautam Gopalakrishnan
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              Dates

              • Created:
                Updated:
                Resolved: