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  1. JDK
  2. JDK-6760773

UseCompressedOops is broken with UseParNewGC

    Details

    • Type: Bug
    • Status: Closed
    • Priority: P2
    • Resolution: Fixed
    • Affects Version/s: hs14
    • Fix Version/s: hs14
    • Component/s: hotspot
    • Labels:
    • Subcomponent:
    • Resolved In Build:
      b07
    • CPU:
      generic
    • OS:
      generic
    • Verification:
      Verified

      Backports

        Description

        Also, UseCompressedOops was supposed to be turned on by default in hs14, bug somehow that changeset was lost.

        Coleen Phillimore - Sun Microsystems wrote:
        >
        >
        > On 09/26/08 20:07, Vladimir Kozlov wrote:
        >> First, UseParNewGC does not work with compressed oops:
        > It is supposed to. Is it broken or just not performant?
        >
        > thanks,
        > Coleen
        >>
        >> pf-t5120-1% gamma -XX:InlineSmallCode=1400 -XX:FreqInlineSize=210 -XX:+UseCompressedOops -XX:+AggressiveOpts -XX:ParallelGCThreads=40 -XX:+UseLargePages -XX:LargePageSizeInBytes=256m -XX:+AlwaysPreTouch -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -Xmx28g -Xms28g -Xmn22g -XX:+UseParNewGC -XX:+PrintTenuringDistribution -Xss256k -cp jbb.jar:check.jar spec.jbb.JBBmain
        >>
        >> Exception in thread "main" java.lang.ClassCastException: java.util.LinkedHashMap$Entry cannot be cast to java.util.Map$Entry
        >> at java.security.Provider.ensureLegacyParsed(Provider.java:536)

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                • Assignee:
                  coleenp Coleen Phillimore
                  Reporter:
                  coleenp Coleen Phillimore
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