Hadoop HDFS
  1. Hadoop HDFS
  2. HDFS-3157

Error in deleting block is keep on coming from DN even after the block report and directory scanning has happened


    • Type: Bug Bug
    • Status: Closed
    • Priority: Major Major
    • Resolution: Fixed
    • Affects Version/s: 0.23.0, 2.0.0-alpha
    • Fix Version/s: 2.0.2-alpha
    • Component/s: namenode
    • Labels:


      Cluster setup:

      1NN,Three DN(DN1,DN2,DN3),replication factor-2,"dfs.blockreport.intervalMsec" 300,"dfs.datanode.directoryscan.interval" 1

      step 1: write one file "a.txt" with sync(not closed)
      step 2: Delete the blocks in one of the datanode say DN1(from rbw) to which replication happened.
      step 3: close the file.

      Since the replication factor is 2 the blocks are replicated to the other datanode.

      Then at the NN side the following cmd is issued to DN from which the block is deleted

      2012-03-19 13:41:36,905 INFO org.apache.hadoop.hdfs.StateChange: BLOCK NameSystem.addToCorruptReplicasMap: duplicate requested for blk_2903555284838653156 to add as corrupt on XX.XX.XX.XX by /XX.XX.XX.XX because reported RBW replica with genstamp 1002 does not match COMPLETE block's genstamp in block map 1003
      2012-03-19 13:41:39,588 INFO org.apache.hadoop.hdfs.StateChange: BLOCK* Removing block blk_2903555284838653156_1003 from neededReplications as it has enough replicas.

      From the datanode side in which the block is deleted the following exception occured

      2012-02-29 13:54:13,126 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: Unexpected error trying to delete block blk_2903555284838653156_1003. BlockInfo not found in volumeMap.
      2012-02-29 13:54:13,126 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: Error processing datanode Command
      java.io.IOException: Error in deleting blocks.
      	at org.apache.hadoop.hdfs.server.datanode.FSDataset.invalidate(FSDataset.java:2061)
      	at org.apache.hadoop.hdfs.server.datanode.BPOfferService.processCommandFromActive(BPOfferService.java:581)
      	at org.apache.hadoop.hdfs.server.datanode.BPOfferService.processCommandFromActor(BPOfferService.java:545)
      	at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.processCommand(BPServiceActor.java:690)
      	at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.offerService(BPServiceActor.java:522)
      	at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.run(BPServiceActor.java:662)
      	at java.lang.Thread.run(Thread.java:619)
      1. HDFS-3157-5.patch
        20 kB
        Ashish Singhi
      2. h3157_20120618.patch
        12 kB
        Tsz Wo Nicholas Sze
      3. HDFS-3157-4.patch
        10 kB
        Ashish Singhi
      4. HDFS-3157-3.patch
        10 kB
        Ashish Singhi
      5. HDFS-3157-3.patch
        10 kB
        Ashish Singhi
      6. HDFS-3157-2.patch
        11 kB
        Ashish Singhi
      7. HDFS-3157-1.patch
        11 kB
        Ashish Singhi
      8. HDFS-3157-1.patch
        11 kB
        Ashish Singhi
      9. HDFS-3157.patch
        8 kB
        Uma Maheswara Rao G
      10. HDFS-3157.patch
        8 kB
        Ashish Singhi
      11. HDFS-3157.patch
        8 kB
        Ashish Singhi

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            • Assignee:
              Ashish Singhi
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