[HADOOP-1955] Corrupted block replication retries for ever

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 0.14.1
• Fix Version/s: 0.14.2, 0.15.0
• Assignee: Raghu Angadi
• Reporter: Koji Noguchi
• Created: 27/Sep/07 18:18
• Updated: 08/Jul/09 16:42
• Resolved: 04/Oct/07 23:59

Description

When replicating corrupted block, receiving side rejects the block due to checksum error. Namenode keeps on retrying (with the same source datanode).
Fsck shows those blocks as under-replicated.

[Namenode log]

 
2007-09-27 02:00:05,273 INFO org.apache.hadoop.dfs.StateChange: BLOCK* NameSystem.heartbeatCheck: lost heartbeat from 99.2.99.111
...
2007-09-27 02:01:02,618 INFO org.apache.hadoop.dfs.StateChange: BLOCK* NameSystem.pendingTransfer: ask 99.9.99.11:9999 to replicate blk_-5925066143536023890 to datanode(s) 99.9.99.37:9999
2007-09-27 02:10:03,843 WARN org.apache.hadoop.fs.FSNamesystem: PendingReplicationMonitor timed out block blk_-5925066143536023890
2007-09-27 02:10:08,248 INFO org.apache.hadoop.dfs.StateChange: BLOCK* NameSystem.pendingTransfer: ask 99.9.99.11:9999 to replicate blk_-5925066143536023890 to datanode(s) 99.9.99.35:9999
2007-09-27 02:20:03,848 WARN org.apache.hadoop.fs.FSNamesystem: PendingReplicationMonitor timed out block blk_-5925066143536023890
2007-09-27 02:20:08,646 INFO org.apache.hadoop.dfs.StateChange: BLOCK* NameSystem.pendingTransfer: ask 99.9.99.11:9999 to replicate blk_-5925066143536023890 to datanode(s) 99.9.99.19:9999
(repeats)

[Datanode(sender) 99.9.99.11 log]

 
2007-09-27 02:01:04,493 INFO org.apache.hadoop.dfs.DataNode: Starting thread to transfer block blk_-5925066143536023890 to [Lorg.apache.hadoop.dfs.DatanodeInfo;@e58187
2007-09-27 02:01:05,153 WARN org.apache.hadoop.dfs.DataNode: Failed to transfer blk_-5925066143536023890 to 74.6.128.37:50010 got java.net.SocketException: Connection reset
  at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:96)
  at java.net.SocketOutputStream.write(SocketOutputStream.java:136)
  at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:65)
  at java.io.BufferedOutputStream.write(BufferedOutputStream.java:109)
  at java.io.DataOutputStream.write(DataOutputStream.java:90)
  at org.apache.hadoop.dfs.DataNode.sendBlock(DataNode.java:1231)
  at org.apache.hadoop.dfs.DataNode$DataTransfer.run(DataNode.java:1280)
  at java.lang.Thread.run(Thread.java:619)
(repeats)

[Datanode(one of the receiver) 99.9.99.37 log]

 
2007-09-27 02:01:05,150 ERROR org.apache.hadoop.dfs.DataNode: DataXceiver: java.io.IOException: Unexpected checksum mismatch while writing blk_-5925066143536023890 from /74.6.128.33:57605
  at org.apache.hadoop.dfs.DataNode$DataXceiver.writeBlock(DataNode.java:902)
  at org.apache.hadoop.dfs.DataNode$DataXceiver.run(DataNode.java:727)
  at java.lang.Thread.run(Thread.java:619)

Issue Links

• is related to: HADOOP-2065 Replication policy for corrupted block