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  1. Hadoop HDFS
  2. HDFS-7325

Prevent thundering herd problem in ByteArrayManager by using notify not notifyAll

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Details

    • Bug
    • Status: Resolved
    • Major
    • Resolution: Duplicate
    • 2.6.0
    • None
    • None
    • None

    Description

      Currently ByteArrayManager wakes all waiting threads whenever a byte array is released and count == limit. However, only one thread can proceed. With a large number of waiters, this will cause a thundering herd problem. (See http://en.wikipedia.org/wiki/Thundering_herd_problem.) We should avoid this by only waking a single thread.

      Attachments

        1. HDFS-7325.001.patch
          1 kB
          Colin McCabe

        Issue Links

          duplicates

          Bug - A problem which impairs or prevents the functions of the product. HDFS-7358 Clients may get stuck waiting when using ByteArrayManager

          • Major - Major loss of function.
          • Closed

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            People

              cmccabe Colin McCabe
              cmccabe Colin McCabe
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              Dates

                Created:
                Updated:
                Resolved: