Details

    • Type: Bug
    • Status: Resolved
    • Priority: Minor
    • Resolution: Fixed
    • Affects Version/s: 2.6.0
    • Fix Version/s: 2.8.0, 3.0.0-alpha1
    • Component/s: hdfs-client
    • Labels:
      None
    • Hadoop Flags:
      Reviewed

      Description

      Currently, a DN disconnection for reasons other than connection timeout or refused messages, such as an EOF message as a result of rejection or other network fault, reports in this manner:

      WARN org.apache.hadoop.hdfs.DFSClient: Failed to connect to /x.x.x.x:nnnn for block, add to deadNodes and continue. java.io.EOFException: Premature EOF: no length prefix available 
      java.io.EOFException: Premature EOF: no length prefix available 
      at org.apache.hadoop.hdfs.protocol.HdfsProtoUtil.vintPrefixed(HdfsProtoUtil.java:171) 
      at org.apache.hadoop.hdfs.RemoteBlockReader2.newBlockReader(RemoteBlockReader2.java:392) 
      at org.apache.hadoop.hdfs.BlockReaderFactory.newBlockReader(BlockReaderFactory.java:137) 
      at org.apache.hadoop.hdfs.DFSInputStream.getBlockReader(DFSInputStream.java:1103) 
      at org.apache.hadoop.hdfs.DFSInputStream.blockSeekTo(DFSInputStream.java:538) 
      at org.apache.hadoop.hdfs.DFSInputStream.readWithStrategy(DFSInputStream.java:750) 
      at org.apache.hadoop.hdfs.DFSInputStream.read(DFSInputStream.java:794) 
      at org.apache.hadoop.hdfs.DFSInputStream.read(DFSInputStream.java:602) 
      

      This is not very clear to a user (warn's at the hdfs-client). It could likely be improved with a more diagnosable message, or at least the direct reason than an EOF.

        Attachments

        1. HDFS-7899-02.patch
          1 kB
          Jagadesh Kiran N
        2. HDFS-7899-01.patch
          1.0 kB
          Jagadesh Kiran N
        3. HDFS-7899-00.patch
          1.0 kB
          Jagadesh Kiran N

          Activity

            People

            • Assignee:
              jagadesh.kiran Jagadesh Kiran N
              Reporter:
              qwertymaniac Harsh J
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              Dates

              • Created:
                Updated:
                Resolved: