GitHub user lizziew opened a pull request:

    Unmap before resizing

    While I was studying how MappedByteBuffer works, I saw a sharing runtime exception on Windows. I applied what I learned to generate a patch which uses an internal open JDK API to solve this problem.
    Caused by: The requested operation cannot be performed
    on a
     file with a user-mapped section open
            at Method)
            at kafka.log.OffsetIndex.liftedTree2$1(OffsetIndex.scala:263)
            at kafka.log.OffsetIndex.resize(OffsetIndex.scala:262)
            at kafka.log.OffsetIndex.trimToValidSize(OffsetIndex.scala:247)
            at kafka.log.Log.rollToOffset(Log.scala:518)
            at kafka.log.Log.roll(Log.scala:502)
            at kafka.log.Log.maybeRoll(Log.scala:484)
            at kafka.log.Log.append(Log.scala:297)

You can merge this pull request into a Git repository by running:

    $ git pull 0.8

Alternatively you can review and apply these changes as the patch at:
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