Test case: containers/cgroup/PlainRead.java
OS: Fails on Ubuntu 21.10
Regression: No, baseline testing

Exception:
java.lang.RuntimeException: '^.*CPU Shares is: *(\d+|-1|-2|Unlimited).*$' missing from stdout/stderr

        at jdk.test.lib.process.OutputAnalyzer.shouldMatch(OutputAnalyzer.java:340)
        at PlainRead.match(PlainRead.java:43)
        at PlainRead.isContainer(PlainRead.java:57)

JavaTest Message: Test threw exception: java.lang.RuntimeException: '^.*CPU Shares is: *(\d+|-1|-2|Unlimited).*$' missing from stdout/stderr


Reason:
Doing a simple ./java -Xlog:os+container=trace -version gives no trace of “CPU Shares” in Ubuntu 21.10 and hence the test fails.


[0.000s][trace][os,container] OSContainer::init: Initializing Container Support
[0.000s][debug][os,container] Detected optional pids controller entry in /proc/cgroups
[0.000s][debug][os,container] Detected cgroups v2 unified hierarchy
[0.000s][trace][os,container] Path to /memory.max is /sys/fs/cgroup/user.slice/user-10770.slice/session-2189.scope/memory.max
[0.000s][trace][os,container] Raw value for memory limit is: max
[0.000s][trace][os,container] Memory Limit is: Unlimited
[0.000s][trace][os,container] Path to /cpu.max is /sys/fs/cgroup/user.slice/user-10770.slice/session-2189.scope/cpu.max
[0.000s][debug][os,container] Open of file /sys/fs/cgroup/user.slice/user-10770.slice/session-2189.scope/cpu.max failed, No such file or directory
[0.000s][trace][os,container] CPU Quota is: -2
[0.000s][trace][os,container] Path to /cpu.max is /sys/fs/cgroup/user.slice/user-10770.slice/session-2189.scope/cpu.max
[0.000s][debug][os,container] Open of file /sys/fs/cgroup/user.slice/user-10770.slice/session-2189.scope/cpu.max failed, No such file or directory
[0.000s][trace][os,container] Path to /cpu.weight is /sys/fs/cgroup/user.slice/user-10770.slice/session-2189.scope/cpu.weight
[0.000s][debug][os,container] Open of file /sys/fs/cgroup/user.slice/user-10770.slice/session-2189.scope/cpu.weight failed, No such file or directory
[0.000s][trace][os,container] OSContainer::active_processor_count: 8
[0.000s][trace][os,container] CgroupSubsystem::active_processor_count (cached): 8
[0.000s][debug][os,container] container memory limit unlimited: -1, using host value
[0.000s][debug][os,container] container memory limit unlimited: -1, using host value
[0.001s][trace][os,container] CgroupSubsystem::active_processor_count (cached): 8
[0.019s][debug][os,container] container memory limit unlimited: -1, using host value
[0.025s][trace][os,container] Path to /cpu.max is /sys/fs/cgroup/user.slice/user-10770.slice/session-2189.scope/cpu.max
[0.025s][debug][os,container] Open of file /sys/fs/cgroup/user.slice/user-10770.slice/session-2189.scope/cpu.max failed, No such file or directory
[0.025s][trace][os,container] CPU Quota is: -2
[0.025s][trace][os,container] Path to /cpu.max is /sys/fs/cgroup/user.slice/user-10770.slice/session-2189.scope/cpu.max
[0.025s][debug][os,container] Open of file /sys/fs/cgroup/user.slice/user-10770.slice/session-2189.scope/cpu.max failed, No such file or directory
[0.025s][trace][os,container] Path to /cpu.weight is /sys/fs/cgroup/user.slice/user-10770.slice/session-2189.scope/cpu.weight
[0.025s][debug][os,container] Open of file /sys/fs/cgroup/user.slice/user-10770.slice/session-2189.scope/cpu.weight failed, No such file or directory
[0.025s][trace][os,container] OSContainer::active_processor_count: 8
[0.027s][trace][os,container] Path to /memory.max is /sys/fs/cgroup/user.slice/user-10770.slice/session-2189.scope/memory.max
[0.027s][trace][os,container] Raw value for memory limit is: max
[0.027s][trace][os,container] Memory Limit is: Unlimited
[0.027s][debug][os,container] container memory limit unlimited: -1, using host value
[0.029s][debug][os,container] container memory limit unlimited: -1, using host value
java version "18-ea" 2022-03-22
Java(TM) SE Runtime Environment (build 18-ea+28-1975)
Java HotSpot(TM) 64-Bit Server VM (build 18-ea+28-1975, mixed mode, sharing)
[0.029s][debug][os,container] container memory limit unlimited: -1, using host value