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  1. Hadoop HDFS
  2. HDFS-8863

The remaining space check in BlockPlacementPolicyDefault is flawed

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      The block placement policy calls DatanodeDescriptor#getRemaining(StorageType}} to check whether the block is going to fit. Since the method is adding up all remaining spaces, namenode can allocate a new block on a full node. This causes pipeline construction failure and abandonBlock. If the cluster is nearly full, the client might hit this multiple times and the write can fail permanently.

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        1. HDFS-8863-branch-2.6.1.txt
          10 kB
          Vinod Kumar Vavilapalli
        2. HDFS-8863.v3.patch
          9 kB
          Kihwal Lee
        3. HDFS-8863.v2.patch
          7 kB
          Kihwal Lee
        4. HDFS-8863.patch
          7 kB
          Kihwal Lee

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        is related to

        Improvement - An improvement or enhancement to an existing feature or task. HDFS-8946 Improve choosing datanode storage for block placement

        • Major - Major loss of function.
        • Resolved

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            kihwal Kihwal Lee Assign to me
            kihwal Kihwal Lee
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