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From "Hairong Kuang (JIRA)" <j...@apache.org>
Subject [jira] Created: (HDFS-1346) DFSClient receives out of order packet ack
Date Wed, 18 Aug 2010 18:19:16 GMT
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

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

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