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  1. Hive
  2. HIVE-20797

Print Number of Locks Acquired

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    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Minor
    • Resolution: Fixed
    • Affects Version/s: 4.0.0
    • Fix Version/s: 4.0.0
    • Component/s: HiveServer2, Locking
    • Labels:

      Description

      The number of locks acquired by a query can greatly influence the performance and stability of the system, especially for ZK locks. Please add INFO level logging with the number of locks each query obtains.

      Log here:
      https://github.com/apache/hive/blob/3963c729fabf90009cb67d277d40fe5913936358/ql/src/java/org/apache/hadoop/hive/ql/Driver.java#L1670-L1672

      A list of acquired locks will be stored in the org.apache.hadoop.hive.ql.Context object and can be retrieved via org.apache.hadoop.hive.ql.Context#getHiveLocks.

      https://github.com/apache/hive/blob/758ff449099065a84c46d63f9418201c8a6731b1/ql/src/java/org/apache/hadoop/hive/ql/lockmgr/HiveTxnManager.java#L115-L127

        Attachments

        1. HIVE-20797.1.patch
          2 kB
          David Mollitor
        2. HIVE-20797.2.patch
          1 kB
          David Mollitor
        3. HIVE-20797.3.patch
          1 kB
          David Mollitor
        4. HIVE-20797.4.patch
          1 kB
          David Mollitor
        5. HIVE-20797.5.patch
          1 kB
          David Mollitor
        6. HIVE-20797.6.patch
          0.9 kB
          David Mollitor

          Activity

            People

            • Assignee:
              belugabehr David Mollitor
              Reporter:
              belugabehr David Mollitor
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              Dates

              • Created:
                Updated:
                Resolved: