Hadoop HDFS
  1. Hadoop HDFS
  2. HDFS-2757

Cannot read a local block that's being written to when using the local read short circuit

    Details

    • Type: Bug Bug
    • Status: Closed
    • Priority: Major Major
    • Resolution: Fixed
    • Affects Version/s: 1.0.0
    • Fix Version/s: 1.2.0, 2.0.2-alpha, 0.23.6
    • Component/s: None
    • Labels:
      None
    • Hadoop Flags:
      Reviewed

      Description

      When testing the tail'ing of a local file with the read short circuit on, I get:

      2012-01-06 00:17:31,598 WARN org.apache.hadoop.hdfs.DFSClient: BlockReaderLocal requested with incorrect offset:  Offset 0 and length 8230400 don't match block blk_-2842916025951313698_454072 ( blockLen 124 )
      2012-01-06 00:17:31,598 WARN org.apache.hadoop.hdfs.DFSClient: BlockReaderLocal: Removing blk_-2842916025951313698_454072 from cache because local file /export4/jdcryans/dfs/data/blocksBeingWritten/blk_-2842916025951313698 could not be opened.
      2012-01-06 00:17:31,599 INFO org.apache.hadoop.hdfs.DFSClient: Failed to read block blk_-2842916025951313698_454072 on local machine java.io.IOException:  Offset 0 and length 8230400 don't match block blk_-2842916025951313698_454072 ( blockLen 124 )
      2012-01-06 00:17:31,599 INFO org.apache.hadoop.hdfs.DFSClient: Try reading via the datanode on /10.4.13.38:51010
      java.io.EOFException: hdfs://sv4r11s38:9100/hbase-1/.logs/sv4r13s38,62023,1325808100311/sv4r13s38%2C62023%2C1325808100311.1325808100818, entryStart=7190409, pos=8230400, end=8230400, edit=5
      
      1. hdfs-2757.txt
        2 kB
        Eli Collins
      2. hdfs-2757-b1.txt
        1 kB
        Eli Collins
      3. HDFS-2757-branch-1.patch
        1 kB
        Jean-Daniel Cryans
      4. HDFS-2757-branch-1-v2.patch
        0.7 kB
        Jean-Daniel Cryans
      5. HDFS-2757-trunk.patch
        2 kB
        Jean-Daniel Cryans

        Activity

          People

          • Assignee:
            Jean-Daniel Cryans
            Reporter:
            Jean-Daniel Cryans
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            Dates

            • Created:
              Updated:
              Resolved:

              Development