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Posted to common-dev@hadoop.apache.org by "dhruba borthakur (JIRA)" <ji...@apache.org> on 2007/09/28 23:06:50 UTC
[jira] Assigned: (HADOOP-1955) Corrupted block replication retries
for ever
[ https://issues.apache.org/jira/browse/HADOOP-1955?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
dhruba borthakur reassigned HADOOP-1955:
----------------------------------------
Assignee: Raghu Angadi
Hi Raghu, can you pl take a look into this one and suggest what could be done? Thanks. Possible options are:
1. Try different source locations for the replication,
2. Delete corrupted source replica
3. If all replicas are corrupt, stop replication.
> Corrupted block replication retries for ever
> --------------------------------------------
>
> Key: HADOOP-1955
> URL: https://issues.apache.org/jira/browse/HADOOP-1955
> Project: Hadoop
> Issue Type: Bug
> Components: dfs
> Affects Versions: 0.14.1
> Reporter: Koji Noguchi
> Assignee: Raghu Angadi
> Priority: Blocker
> Fix For: 0.14.2
>
>
> 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]
> {noformat}
> 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)
> {noformat}
> [Datanode(sender) 99.9.99.11 log]
> {noformat}
> 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$DataTransfer.run(DataNode.java:1280)
> at java.lang.Thread.run(Thread.java:619)
> (repeats)
> {noformat}
> [Datanode(one of the receiver) 99.9.99.37 log]
> {noformat}
> 2007-09-27 02:01:05,150 ERROR org.apache.hadoop.dfs.DataNode: DataXceiver: java.io.IOException: Unexpected checksum mismatch while writing blk_-5925066143536023890 from /74.6.128.33:57605
> at org.apache.hadoop.dfs.DataNode$DataXceiver.writeBlock(DataNode.java:902)
> at org.apache.hadoop.dfs.DataNode$DataXceiver.run(DataNode.java:727)
> at java.lang.Thread.run(Thread.java:619)
> {noformat}
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