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https://issues.apache.org/jira/browse/HADOOP-5286?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12674984#action_12674984
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Hemanth Yamijala commented on HADOOP-5286:
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The NameNode log for the block blk_2044238107768440002_840946 shows the
following:
2009-02-19 09:52:50,952 INFO
org.apache.hadoop.hdfs.server.namenode.FSNamesystem:
commitBlockSynchronization(blk_2044238107768440002_840946) successful
2009-02-19 09:52:50,975 WARN
org.apache.hadoop.hdfs.server.namenode.FSNamesystem: Inconsistent size for
block blk_2044238107768440002_840946 reported from <ip>:<port> current size is
195072 reported size is 1318567
2009-02-19 09:52:50,975 WARN org.apache.hadoop.hdfs.StateChange: BLOCK*
NameSystem.addStoredBlock: Redundant addStoredBlock request received for
blk_2044238107768440002_840946 on <ip>:<port> size 1318567
2009-02-19 09:57:41,786 INFO org.apache.hadoop.hdfs.StateChange: BLOCK* ask
<ip>:<port> to replicate blk_2044238107768440002_840946 to datanode(s)
<ip>:<port>
2009-02-19 10:11:00,267 INFO org.apache.hadoop.hdfs.StateChange: BLOCK* ask
<ip>:<port> to replicate blk_2044238107768440002_840946 to datanode(s)
<ip>:<port>
2009-02-19 11:27:00,030 INFO org.apache.hadoop.hdfs.StateChange: BLOCK* ask
<ip>:<port> to replicate blk_2044238107768440002_840946 to datanode(s)
<ip>:<port>
> DFS client blocked for a long time reading blocks of a file on the JobTracker
> -----------------------------------------------------------------------------
>
> Key: HADOOP-5286
> URL: https://issues.apache.org/jira/browse/HADOOP-5286
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs
> Affects Versions: 0.20.0
> Reporter: Hemanth Yamijala
> Attachments: jt-log-for-blocked-reads.txt
>
>
> On a large cluster, we've observed that DFS client was blocked on reading a
> block of a file for almost 1 and half hours. The file was being read by the
> JobTracker of the cluster, and was a split file of a job. On the NameNode
> logs, we observed that the block had a message as follows:
> Inconsistent size for block blk_2044238107768440002_840946 reported from
> <ip>:<port> current size is 195072 reported size is 1318567
> Details follow.
>
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