Uploaded image for project: 'JDK'
  1. JDK
  2. JDK-8227370 Remove SharedPathsMiscInfo
  3. JDK-8230291

Release Note: CDS Behavior Change With Non-existent Files During Archive Creation

    XMLWordPrintable

Details

    • Verified

    Description

      In JDK 14, CDS runtime classpath validation is now more forgiving when dealing with files in the classpath that do not exist.

      At CDS archive dump time, all non-existent elements in the classpath are automatically stripped. For example, if the command is:

          java -cp nosuchfile.jar:hello.jar -Xshare:dump \
               -XX:SharedClassListFile=hello.classlist \
               -XX:SharedArchiveFile=hello.jsa

      after removing the non-existing elements, the classpath recorded in `hello.jsa` becomes `hello.jar`.

      Also, at run time, when the CDS archive is loaded, all non-existent elements in the classpath are ignored. With the previous example, all of the following commands will successfully load the archive:

         (1)
      ```
          java -cp nosuchfile.jar:hello.jar -Xshare:on \
               -XX:SharedArchiveFile=hello.jsa \
               Hello
      ```
         (2)
      ```
          java -cp hello.jar -Xshare:on \
               -XX:SharedArchiveFile=hello.jsa \
               Hello
      ```
         (3)
      ```
          java -cp alsonosuchfile.jar:hello.jar -Xshare:on \
               -XX:SharedArchiveFile=hello.jsa \
               Hello
      ```

      In JDK 13 and earlier, only (1) is allowed while (2) and (3) would trigger an error.

      Attachments

        Activity

          People

            iklam Ioi Lam
            iklam Ioi Lam
            Votes:
            0 Vote for this issue
            Watchers:
            2 Start watching this issue

            Dates

              Created:
              Updated:
              Resolved: