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https://issues.apache.org/jira/browse/HADOOP-3035?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chris Douglas reassigned HADOOP-3035:
-------------------------------------
Assignee: lohit vijayarenu
> Data nodes should inform the name-node about block crc errors.
> --------------------------------------------------------------
>
> Key: HADOOP-3035
> URL: https://issues.apache.org/jira/browse/HADOOP-3035
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs
> Affects Versions: 0.16.0
> Reporter: Konstantin Shvachko
> Assignee: lohit vijayarenu
> Attachments: HADOOP-3035-1.patch, HADOOP-3035-2.patch
>
>
> Currently if a crc error occurs when data-node replicates a block to another
> node it throws an exception, and continues.
> {code}
> [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)
> {code}
> The data-node should report the error to the name-node so that the corrupted
> replica could be removed and replicated.
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