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  1. Hadoop HDFS
  2. HDFS-1508

Ability to do savenamespace without being in safemode

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Details

    • Improvement
    • Status: Patch Available
    • Major
    • Resolution: Unresolved
    • None
    • None
    • namenode

    Description

      In the current code, the administrator can run savenamespace only after putting the namenode in safemode. This means that applications that are writing to HDFS encounters errors because the NN is in safemode. We would like to allow saveNamespace even when the namenode is not in safemode.

      The savenamespace command already acquires the FSNamesystem writelock. There is no need to require that the namenode is in safemode too.

      Attachments

        1. savenamespaceWithoutSafemode.txt
          2 kB
          Dhruba Borthakur
        2. savenamespaceWithoutSafemode2.txt
          15 kB
          Dhruba Borthakur
        3. savenamespaceWithoutSafemode3.txt
          18 kB
          Dhruba Borthakur
        4. savenamespaceWithoutSafemode4.txt
          18 kB
          Dhruba Borthakur
        5. savenamespaceWithoutSafemode5.txt
          18 kB
          Dhruba Borthakur

        Issue Links

          is broken by

          Bug - A problem which impairs or prevents the functions of the product. HDFS-1597 Batched edit log syncs can reset synctxid throw assertions

          • Blocker - Blocks development and/or testing work, production could not run
          • Closed
          is related to

          New Feature - A new feature of the product, which has yet to be developed. HADOOP-4826 Admin command saveNamespace.

          • Major - Major loss of function.
          • Closed

          Improvement - An improvement or enhancement to an existing feature or task. HDFS-1509 Resync discarded directories in fs.name.dir during saveNamespace command

          • Major - Major loss of function.
          • Resolved

          Activity

            People

              dhruba Dhruba Borthakur
              dhruba Dhruba Borthakur
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              Dates

                Created:
                Updated: