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  1. JDK
  2. JDK-8198249

Remove deprecated Runtime::runFinalizersOnExit and System::runFinalizersOnExit

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Details

    • Enhancement
    • Resolution: Fixed
    • P3
    • 11
    • 11
    • core-libs
    • b03

    Description

      Runtime::runFinalizersOnExit is inherently unsafe [1] and has been deprecated since 1.2. It has been deprecated for removal in Java SE 9.

      It may result in finalizers being called on live objects while other threads are concurrently manipulating those objects, resulting in erratic behavior or deadlock. While this problem could be prevented if the class whose objects are being finalized were coded to "defend against" this call, most programmers do not defend against it. They assume that an object is dead at the time that its finalizer is called.

      Further, the call is not "thread-safe" in the sense that it sets a VM-global flag. This forces every class with a finalizer to defend against the finalization of live objects!

      [1] https://docs.oracle.com/javase/9/docs/api/java/lang/doc-files/threadPrimitiveDeprecation.html

      Attachments

        Issue Links

          blocks

          Bug - A problem which impairs or prevents the functions of the product. JDK-8177680 Umbrella: JDK 11 terminal deprecations

          • P3 - Major loss of function.
          • Resolved
          csr for

          CSR - null JDK-8198250 Remove deprecated Runtime::runFinalizersOnExit and System::runFinalizersOnExit

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

          Bug - A problem which impairs or prevents the functions of the product. JDK-8198639 Examine Windows AWT dependency on runFinalizersOnExit

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

          Enhancement - null JDK-8288984 Simplification in java.lang.Runtime::exit

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

          Sub-task - The sub-task of the issue JDK-8193035 remove terminally deprecated APIs from java.lang

          • P3 - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. JDK-4240589 (ref) runFinalizersOnExit(true) causes VM crash for user native libraries

          • P3 - Major loss of function.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. JDK-8197812 (ref) Data race in Finalizer

          • P3 - Major loss of function.
          • Closed

          Enhancement - null JDK-8287132 Retire Runtime.runFinalizersOnExit so that it always throws UOE

          • P3 - Major loss of function.
          • Resolved

          CSR - null JDK-8287133 Retire Runtime.runFinalizersOnExit so that it always throws UOE

          • P3 - Major loss of function.
          • Closed

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              mchung Mandy Chung
              mchung Mandy Chung
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                Created:
                Updated:
                Resolved: