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  1. Hadoop HDFS
  2. HDFS-1332

When unable to place replicas, BlockPlacementPolicy should log reasons nodes were excluded

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Details

    • Improvement
    • Status: Resolved
    • Minor
    • Resolution: Fixed
    • None
    • 0.23.0
    • namenode
    • Reviewed

    Description

      Whenever the block placement policy determines that a node is not a "good target" it could add the reason for exclusion to a list, and then when we log "Not able to place enough replicas" we could say why each node was refused. This would help new users who are having issues on pseudo-distributed (eg because their data dir is on /tmp and /tmp is full). Right now it's very difficult to figure out the issue.

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          breaks

          Bug - A problem which impairs or prevents the functions of the product. HDFS-2245 BlockManager.chooseTarget(..) throws NPE

          • Major - Major loss of function.
          • Closed

          Activity

            People

              yuzhihong@gmail.com Ted Yu
              tlipcon Todd Lipcon
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              Dates

                Created:
                Updated:
                Resolved: