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  1. Hadoop HDFS
  2. HDFS-2802 Support for RW/RO snapshots in HDFS
  3. HDFS-4627

Fix FSImageFormat#Loader NPE and synchronization issues

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Details

    • Sub-task
    • Status: Resolved
    • Major
    • Resolution: Fixed
    • None
    • Snapshot (HDFS-2802)
    • namenode
    • None
    • Reviewed

    Description

      1. Currently FSImageFormat#Loader#loadFilesUnderConstruction calls FSDirectory#unprotectedReplaceINodeFile without acquiring FSDirectory's lock. FSDirectory#replaceINodeFile should be called instead.
      2. Currently FSImage#Loader#loadINode does not create block[] object (i.e., keep it as null) when the length of the block is 0. This will cause NPE when the loaded INodeFile is empty, and then an append operation on this inode is applied from edit log.

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            jingzhao Jing Zhao Assign to me
            jingzhao Jing Zhao
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