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  1. JDK
  2. JDK-8280041

Retry loop issues in java.io.ClassCache

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      Description

        JDK-8277072 introduced java.io.ClassCache, but there seem to be at least two issues with it:
         *) The cache cannot disambiguate between cleared SoftReference and the accidental passing of "null" value; in that case, the retry loop would spin indefinitely;
         *) If retry loop would spin several times, every time discovering a cleared SoftReference, it would create and register new SoftReference on the ReferenceQueue. However, it would not *drain* the RQ in the loop; in that case, we might have the unbounded garbage accumulating in RQ;

        WIP: https://github.com/openjdk/jdk/pull/7092

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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-8283589 Retry loop issues in java.io.ClassCache

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

            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-8283679 Retry loop issues in java.io.ClassCache

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

            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-8284131 Retry loop issues in java.io.ClassCache

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

            Enhancement - null JDK-8309688 Data race on java.io.ClassCache$CacheRef.strongReferent

            • 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-8277072 ObjectStreamClass caches keep ClassLoaders alive

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

            Commit Commit openjdk/jdk11u-dev/b1f18cb2

            Commit Commit openjdk/jdk17u-dev/99237145

            Commit Commit openjdk/jdk18u/27fbc080

            Commit Commit openjdk/jdk/cebaad1c

            Review Review openjdk/jdk11u-dev/887

            Review Review openjdk/jdk17u-dev/244

            Review Review openjdk/jdk17u-dev/245

            Review Review openjdk/jdk18u/46

            Review Review openjdk/jdk/7092

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                shade Aleksey Shipilev
                shade Aleksey Shipilev
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