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  1. Hadoop Common
  2. HADOOP-13017

Implementations of InputStream.read(buffer, offset, bytes) to exit 0 if bytes==0

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Details

    • Improvement
    • Status: Resolved
    • Major
    • Resolution: Fixed
    • 2.8.0
    • 2.8.0
    • fs, io
    • None

    Description

      HDFS-10277 showed that HDFS was return -1 on read(buf[], 0, 0) when there was no data left in the stream; Java IO says

      If len is zero, then no bytes are read and 0 is returned; otherwise, there is an attempt to read at least one byte.

      Review the implementations of {{IOStream.(buffer, offset, bytes)} and, where necessary and considered safe, add a fast exit if the length is 0.

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        breaks

        Bug - A problem which impairs or prevents the functions of the product. HADOOP-13798 TestHadoopArchives times out

        • Major - Major loss of function.
        • Resolved
        is depended upon by

        Improvement - An improvement or enhancement to an existing feature or task. HADOOP-11694 Über-jira: S3a phase II: robustness, scale and performance

        • Major - Major loss of function.
        • Resolved
        relates to

        Bug - A problem which impairs or prevents the functions of the product. HDFS-10277 PositionedReadable test testReadFullyZeroByteFile failing in HDFS

        • Major - Major loss of function.
        • Resolved

        Improvement - An improvement or enhancement to an existing feature or task. HADOOP-12994 Specify PositionedReadable, add contract tests, fix problems

        • Major - Major loss of function.
        • Resolved

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            stevel@apache.org Steve Loughran Assign to me
            stevel@apache.org Steve Loughran
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              Updated:
              Resolved:

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