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  1. JDK
  2. JDK-8296754

AutoCreateSharedArchive in JDK 20 is not compatible with JDK 19

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Details

    • Bug
    • Resolution: Fixed
    • P3
    • 20
    • 20
    • hotspot
    • b26

    Description

      The -XX:+AutoCreateSharedArchive flag was implemented in JDK 19 (JDK-8261455). However, this flag doesn't work across JDK 19 and 20.

      Expected: JDK 20 should recreate the specified CDS archive
      Actual: JDK 20 cannot recognize the archive file and gives up

      $ rm foo.jsa

      $ ./jdk-19/bin/java -XX:+AutoCreateSharedArchive -XX:SharedArchiveFile=foo.jsa -cp HelloWorld.jar HelloWorld
      Hello World

      $ ls -l foo.jsa
      -r--r--r-- 1 iklam iklam 241664 Nov 9 17:58 foo.jsa

      $ java -showversion -Xlog:cds -XX:+AutoCreateSharedArchive -XX:SharedArchiveFile=foo.jsa -cp HelloWorld.jar HelloWorld
      [0.000s][info][cds] UseSharedSpaces: The shared archive file version 0xe does not match the required version 0x11.
      [0.000s][info][cds] UseSharedSpaces: Invalid base_archive_name offset/size: 0/527052459
      Java HotSpot(TM) 64-Bit Server VM warning: -XX:+AutoCreateSharedArchive is unsupported when base CDS archive is not loaded. Run with -Xlog:cds for more info.
      [0.000s][info][cds] Unable to use shared archive: invalid archive
      java version "20-internal" 2023-03-21
      Java(TM) SE Runtime Environment (build 20-internal-adhoc.iklam.rum)
      Java HotSpot(TM) 64-Bit Server VM (build 20-internal-adhoc.iklam.rum, mixed mode)
      Hello World

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              matsaave Matias Saavedra Silva
              iklam Ioi Lam
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                Updated:
                Resolved: