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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] Created: (HDFS-1058) reading from file under construction fails if it reader beats writer to DN for new block
Date Mon, 22 Mar 2010 00:57:27 GMT
reading from file under construction fails if it reader beats writer to DN for new block
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                 Key: HDFS-1058
                 URL: https://issues.apache.org/jira/browse/HDFS-1058
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: data-node, hdfs client
    Affects Versions: 0.21.0, 0.22.0
            Reporter: Todd Lipcon


If there is a writer and concurrent reader, the following can occur:
- The writer allocates a new block from the NN
- The reader calls getBlockLocations
- Reader connects to the DN and calls getReplicaVisibleLength
- writer still has not talked to the DN, so DN doesn't know about the block and throws an
error

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