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  1. JDK
  2. JDK-8049421

G1 Class Unloading after completing a concurrent mark cycle

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    • gc
    • b24

    Backports

      Description

        Currently G1 treats all classes as live except for during full gcs.

        Modify the concurrent marking code to keep track of liveness of classes in order to be able to unload unreachable classes at the remark pause.
        This involves reusing the infrastructure used by CMS to follow the object headers to find live classes.

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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-8056641 G1 Class Unloading after completing a concurrent mark cycle

            • P2 - Crashes, loss of data, severe memory leak.
            • 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-8063562 G1 Class Unloading after completing a concurrent mark cycle

            • P2 - Crashes, loss of data, severe memory leak.
            • 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-8070842 G1 Class Unloading after completing a concurrent mark cycle

            • P2 - Crashes, loss of data, severe memory leak.
            • 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-8049579 G1 Class Unloading after completing a concurrent mark cycle

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

            Enhancement - null JDK-8048248 [Backed out] G1 Class Unloading after completing a concurrent mark cycle

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

            Enhancement - null JDK-8015332 G1: Interned strings with no references only garbage collected upon full GC.

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

            Sub-task - The sub-task of the issue JDK-8051611 Implement Class Unloading after completing a concurrent mark cycle

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

            Bug - A problem which impairs or prevents the functions of the product. JDK-8049420 Backout 8048248 to correct attribution

            • P5 - Cosmetic problem like misspelt words or misaligned text.
            • Resolved

            Bug - A problem which impairs or prevents the functions of the product. JDK-8056240 Investigate increased GC remark time after class unloading changes in CRM Fuse

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

            Enhancement - null JDK-8048269 Add flag to turn off class unloading after G1 concurrent mark

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

            Enhancement - null JDK-8048268 G1 Code Root Migration performs poorly

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

            Enhancement - null JDK-8015332 G1: Interned strings with no references only garbage collected upon full GC.

            • P3 - Major loss of function.
            • Closed

            Bug - A problem which impairs or prevents the functions of the product. JDK-8058563 InstanceKlass::_dependencies list isn't cleared from empty nmethodBucket entries

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

            Bug - A problem which impairs or prevents the functions of the product. JDK-8136973 Unreachable classes are not deleted after the end of Conc Mark Cycle

            • 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-8166277 SIGSEGV in Dependencies::DepStream::argument(int)

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

            JEP - Java Enhancement Proposal JDK-8046146 JEP 156: G1 GC: Reduce need for full GCs

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

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                stefank Stefan Karlsson
                stefank Stefan Karlsson
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                  Created:
                  Updated:
                  Resolved: