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  1. JDK
  2. JDK-6236036

Timeouts can cause garbage retention in lock classes

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Details

    • Bug
    • Resolution: Fixed
    • P3
    • 6
    • 5.0, 6
    • core-libs

    Backports

      Description

        Doug Lea writes:

        Classes built using AbstractQueuedSynchronizer and/or SynchronousQueue
        can retain garbage nodes when consumers repeatedly time out and there
        are never any producers/signals.

        Test code: get from jsr166 CVS:
           src/test/jtreg/util/concurrent/BlockingQueue/PollMemoryLeak.java

        (I don't know test harness syntax to ensure that it runs with
        little enough memory to trip error in finite time. You probably
        need to adjust this.)

        Fix: Check for lack of signals on cancellation and clear queues.
        See changes to AbstractQueuedSynchronizer and SynchronousQueue
        (the new AbstractQueuedLongSynchronizer also conforms.)


        ###@###.### 2005-03-04 04:15:39 GMT

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            backported by

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-2143708 Timeouts can cause garbage retention in lock classes

            • P3 - Major loss of function.
            • Closed
            duplicates

            Bug - A problem which impairs or prevents the functions of the product. JDK-6457123 timeouts cause garbage retention in java.util.concurrent lock classes

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Closed

            Bug - A problem which impairs or prevents the functions of the product. JDK-6457125 ArrayBlockingQueue.poll(long, TimeUnit) memory leak

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Closed
            relates to

            Bug - A problem which impairs or prevents the functions of the product. JDK-6460501 Synchronizer timed acquire still leaks memory

            • P3 - Major loss of function.
            • Closed

            Bug - A problem which impairs or prevents the functions of the product. JDK-6500694 Need to backport fix for 6236036 to Java 5 from Java 6

            • P3 - Major loss of function.
            • Closed

            Enhancement - null JDK-6237968 Add AbstractQueuedLongSynchronizer, providing support for 64 bits of synchronization state

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved

            Enhancement - null JDK-6491621 Documentation for timeouts cause garbage retention in java.util.concurrent lock

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Closed

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                martin Martin Buchholz
                martin Martin Buchholz
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