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  1. JDK
  2. JDK-8206243

java -XshowSettings fails if memory.limit_in_bytes overflows LONG.max

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    • Resolved In Build:
      b22

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        On some Linux kernels, the unlimited value of memory.limit_in_bytes is returned as ULONG_MAX, not LONG_MAX.

        - .../nightly $ cat //sys/fs/cgroup/memory/memory.limit_in_bytes
        18446744073709551615

        In those cases, java -XshowSettings will fail:

        java -XshowSettings
        ....
        Operating System Metrics:
            Provider: cgroupv1
            Effective CPU Count: 8
            CPU Period: 100000us
            CPU Quota: -1
            CPU Shares: -1
            List of Processors, 8 total:
            0 1 2 3 4 5 6 7
            List of Effective Processors, 0 total:
                List of Memory Nodes, 1 total:
            0
            List of Available Memory Nodes, 0 total:
                CPUSet Memory Pressure Enabled: false
        Exception in thread "main" java.lang.NumberFormatException: For input string: "18446744073709551615"
                at java.base/java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
                at java.base/java.lang.Long.parseLong(Long.java:692)
                at java.base/java.lang.Long.parseLong(Long.java:817)
                at java.base/jdk.internal.platform.cgroupv1.SubSystem.getLongValue(SubSystem.java:106)
                at java.base/jdk.internal.platform.cgroupv1.Metrics.getMemoryLimit(Metrics.java:374)
                at java.base/sun.launcher.LauncherHelper.printSystemMetrics(LauncherHelper.java:385)
                at java.base/sun.launcher.LauncherHelper.showSettings(LauncherHelper.java:180)

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                Assignee:
                stuefe Thomas Stuefe
                Reporter:
                stuefe Thomas Stuefe
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