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From "Vinay (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-5031) BlockScanner scans the block multiple times and on restart scans everything
Date Thu, 25 Jul 2013 12:35:50 GMT
Vinay created HDFS-5031:
---------------------------

             Summary: BlockScanner scans the block multiple times and on restart scans everything
                 Key: HDFS-5031
                 URL: https://issues.apache.org/jira/browse/HDFS-5031
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: datanode
    Affects Versions: 3.0.0, 2.1.0-beta
            Reporter: Vinay
            Assignee: Vinay
            Priority: Blocker


BlockScanner scans the block twice, also on restart of datanode scans everything.

Steps:
1. Write blocks with interval of more than 5 seconds. write new block on completion of scan
for written block.

Each time datanode scans new block, it also scans, previous block which is already scanned.


Now after restart, datanode scans all blocks again.

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