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Posted to hdfs-dev@hadoop.apache.org by "bc Wong (JIRA)" <ji...@apache.org> on 2010/02/25 09:24:27 UTC

[jira] Created: (HDFS-1001) DataXceiver and BlockReader disagree on when to send/recv CHECKSUM_OK

DataXceiver and BlockReader disagree on when to send/recv CHECKSUM_OK
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                 Key: HDFS-1001
                 URL: https://issues.apache.org/jira/browse/HDFS-1001
             Project: Hadoop HDFS
          Issue Type: Bug
    Affects Versions: 0.22.0
            Reporter: bc Wong


Running the TestPread with additional debug statements reveals that the BlockReader sends CHECKSUM_OK when the DataXceiver doesn't expect it. Currently it doesn't matter since DataXceiver closes the connection after each op, and CHECKSUM_OK is the last thing on the wire. But if we want to cache connections, they need to agree on the exchange of CHECKSUM_OK.

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