Hadoop Common
  1. Hadoop Common
  2. HADOOP-3035

Data nodes should inform the name-node about block crc errors.

    Details

    • Type: Bug Bug
    • Status: Closed
    • Priority: Major Major
    • Resolution: Fixed
    • Affects Version/s: 0.16.0
    • Fix Version/s: 0.18.0
    • Component/s: None
    • Labels:
      None
    • Hadoop Flags:
      Incompatible change
    • Release Note:
      Changed protocol for transferring blocks between data nodes to report corrupt blocks to data node for re-replication from a good replica.

      Description

      Currently if a crc error occurs when data-node replicates a block to another node it throws an exception, and continues.

          [junit] 2008-03-17 19:46:11,855 INFO  dfs.DataNode (DataNode.java:transferBlocks(811)) - 127.0.0.1:3730 Starting thread to transfer block blk_-1962819020391742554 to 127.0.0.1:3740
          [junit] 2008-03-17 19:46:11,855 INFO  dfs.DataNode (DataNode.java:writeBlock(1067)) - Receiving block blk_-1962819020391742554 src: /127.0.0.1:3791 dest: /127.0.0.1:3740
          [junit] 2008-03-17 19:46:11,855 INFO  dfs.DataNode (DataNode.java:receiveBlock(2504)) - Exception in receiveBlock for block blk_-1962819020391742554 java.io.IOException: Unexpected checksum mismatch while writing blk_-1962819020391742554 from /127.0.0.1
          [junit] 2008-03-17 19:46:11,871 INFO  dfs.DataNode (DataNode.java:run(2626)) - 127.0.0.1:3730:Transmitted block blk_-1962819020391742554 to /127.0.0.1:3740
          [junit] 2008-03-17 19:46:11,871 INFO  dfs.DataNode (DataNode.java:writeBlock(1192)) - writeBlock blk_-1962819020391742554 received exception java.io.IOException: Unexpected checksum mismatch while writing blk_-1962819020391742554 from /127.0.0.1
          [junit] 2008-03-17 19:46:11,871 ERROR dfs.DataNode (DataNode.java:run(979)) - 127.0.0.1:3740:DataXceiver: java.io.IOException: Unexpected checksum mismatch while writing blk_-1962819020391742554 from /127.0.0.1
          [junit]     at org.apache.hadoop.dfs.DataNode$BlockReceiver.receiveChunk(DataNode.java:2246)
          [junit]     at org.apache.hadoop.dfs.DataNode$BlockReceiver.receivePacket(DataNode.java:2416)
          [junit]     at org.apache.hadoop.dfs.DataNode$BlockReceiver.receiveBlock(DataNode.java:2474)
          [junit]     at org.apache.hadoop.dfs.DataNode$DataXceiver.writeBlock(DataNode.java:1173)
          [junit]     at org.apache.hadoop.dfs.DataNode$DataXceiver.run(DataNode.java:956)
          [junit]     at java.lang.Thread.run(Thread.java:595)
      

      The data-node should report the error to the name-node so that the corrupted replica could be removed and replicated.

      1. HADOOP-3035-1.patch
        10 kB
        Lohit Vijayarenu
      2. HADOOP-3035-2.patch
        10 kB
        Lohit Vijayarenu
      3. HADOOP-3035-3.patch
        12 kB
        Lohit Vijayarenu

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            • Assignee:
              Lohit Vijayarenu
              Reporter:
              Konstantin Shvachko
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              Dates

              • Created:
                Updated:
                Resolved:

                Development