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  1. JDK
  2. JDK-8246585

ForkJoin updates

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Details

    • Enhancement
    • Resolution: Fixed
    • P3
    • 17
    • 13
    • core-libs
    • None

    Description

      This is a followup to JDK13 updates to refresh internal java.util.concurrent lock usages and support. Quoting internal documentation:
           * * ForkJoinTask now uses field "aux" to support blocking joins
           * and/or record exceptions, replacing reliance on builtin
           * monitors and side tables.
           * * Scans probe slots (vs compare indices), along with related
           * changes that reduce performance differences across most
           * garbage collectors, and reduce contention.
           * * Refactoring for better integration of special task types and
           * other capabilities that had been incrementally tacked on. Plus
           * many minor reworkings to improve consistency.

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        Issue Links

          csr for

          CSR - null JDK-8246587 ForkJoin updates

          • P3 - Major loss of function.
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. JDK-8284504 ForkJoinPool never terminates if shutdownNow() is called at the wrong moment.

          • P3 - Major loss of function.
          • Open

          Bug - A problem which impairs or prevents the functions of the product. JDK-8285638 Unexpected change of behavior of ForkJoin common pool clearing thread locals

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

          Bug - A problem which impairs or prevents the functions of the product. JDK-8259518 Fixes for rare test failures due to 8246585: ForkJoin updates

          • P2 - Crashes, loss of data, severe memory leak.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. JDK-8229253 forkjoin/FJExceptionTableLeak.java fails "AssertionError: failed to satisfy condition"

          • P3 - Major loss of function.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. JDK-8299768 No. of running threads may exceed parallelism when using timed ForkJoinTask.get

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

          Bug - A problem which impairs or prevents the functions of the product. JDK-8259800 timeout in tck test testForkJoin(ForkJoinPool8Test)

          • P2 - Crashes, loss of data, severe memory leak.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. JDK-8274349 ForkJoinPool.commonPool() does not work with 1 CPU

          • P3 - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. JDK-8315740 ForkJoinPool starvation in commonPool/newWorkStealingPool since java 17

          • P3 - Major loss of function.
          • Closed
          links to

          Commit Commit openjdk/jdk/5cfa8c94

          Review Review openjdk/jdk/1646

          Activity

            People

              martin Martin Buchholz
              dl Doug Lea
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              Dates

                Created:
                Updated:
                Resolved: