Uploaded image for project: 'JDK'
  1. JDK
  2. JDK-8296733

JFR: File Read event for RandomAccessFile::write(byte[]) is incorrect

    XMLWordPrintable

Details

    • jfr
    • b24
    • Not verified

    Backports

      Description

        The duration of the jdk.FileRead event calculation is incorrect. The start time is not subtracted from the end time, instead the end time is used as the duration.

        This means all FileRead events are likely to be included, regardless if the threshold is below 20 ms. This could overflow buffers, but also lead to overlapping events, which are trickier (slower) for JMC to read..

        This regression was introduced in JDK 15 when ThreadLocals were removed.


        Impact: High, loss of data
        Likelihood: Low/Medium
        Workaround: Medium, disable FileRead event

        H(L/M)M => P2

        Attachments

          Issue Links

            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-8297462 JFR: File Read event for RandomAccessFile::write(byte[]) is incorrect

            • 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-8297592 JFR: File Read event for RandomAccessFile::write(byte[]) is incorrect

            • 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-8297231 JFR: File Read event for RandomAccessFile::write(byte[]) is incorrect

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

            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-8297643 JFR: File Read event for RandomAccessFile::write(byte[]) is incorrect

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

            Commit Commit openjdk/jdk17u-dev/10e16274

            Commit Commit openjdk/jdk19u/55a239c7

            Commit Commit openjdk/jdk/ced88a2f

            Review Review openjdk/jdk17u-dev/895

            Review Review openjdk/jdk19u/65

            Review Review openjdk/jdk/11075

            Activity

              People

                egahlin Erik Gahlin
                egahlin Erik Gahlin
                Votes:
                1 Vote for this issue
                Watchers:
                6 Start watching this issue

                Dates

                  Created:
                  Updated:
                  Resolved: