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Posted to hdfs-dev@hadoop.apache.org by "Hairong Kuang (JIRA)" <ji...@apache.org> on 2010/09/27 20:15:36 UTC
[jira] Resolved: (HDFS-1346) DFSClient receives out of order packet
ack
[ https://issues.apache.org/jira/browse/HDFS-1346?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Hairong Kuang resolved HDFS-1346.
---------------------------------
Hadoop Flags: [Reviewed]
Resolution: Fixed
I've committed this.
> DFSClient receives out of order packet ack
> ------------------------------------------
>
> Key: HDFS-1346
> URL: https://issues.apache.org/jira/browse/HDFS-1346
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: data-node, hdfs client
> Affects Versions: 0.20-append
> Reporter: Hairong Kuang
> Assignee: Hairong Kuang
> Fix For: 0.20-append
>
> Attachments: blockrecv-diff.txt, outOfOrder.patch
>
>
> When running 0.20 patched with HDFS-101, we sometimes see an error as follow:
> WARN hdfs.DFSClient: DFSOutputStream ResponseProcessor exception for block blk_-2871223654872350746_21421120java.io.IOException: Responseprocessor: Expecting seq
> no for block blk_-2871223654872350746_21421120 10280 but received 10281
> at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$ResponseProcessor.run(DFSClient.java:2570)
> This indicates that DFS client expects an ack for packet N, but receives an ack for packet N+1.
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