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  1. Hadoop HDFS
  2. HDFS-1169

Can't read binary data off HDFS via thrift API

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    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Major
    • Resolution: Won't Fix
    • Affects Version/s: 0.20.2
    • Fix Version/s: None
    • Component/s: None
    • Labels:
      None

      Description

      Trying to access binary data stored in HDFS (in my case, TypedByte files generated by Dumbo) via thrift talking to org.apache.hadoop.thriftfs.HadoopThriftServer, the data I get back is mangled. For example, when I read a file which contains the value 0xa2, it's coming back as 0xef 0xbf 0xbd, also known as the Unicode replacement character.

      I think this is because the read method in HadoopThriftServer.java is trying to convert the data read from HDFS into UTF-8 via the String() constructor.

      This essentially makes the HDFS thrift API useless for me .

      Not being an expert on Thrift, but would it be possible to modify the API so that it uses the binary type listed on http://wiki.apache.org/thrift/ThriftTypes?

        Attachments

        1. thriftfs.jar
          23 kB
          Johnny Boy
        2. thriftfs.jar
          23 kB
          Johnny Boy
        3. HadoopThriftServer.java
          20 kB
          Stuart Smith
        4. hadoopfs.thrift
          4 kB
          Stuart Smith

          Activity

            People

            • Assignee:
              Unassigned
              Reporter:
              forsberg Erik Forsberg
            • Votes:
              1 Vote for this issue
              Watchers:
              3 Start watching this issue

              Dates

              • Created:
                Updated:
                Resolved: