RFR: 8259008: ArithmeticException was thrown at "Monitor Cache Dump" on HSDB [v2]

[Yasumasa Suenaga]

On Fri, 22 Jan 2021 18:00:09 GMT, Daniel D. Daugherty <dcubed at openjdk.org> wrote:

>> Yasumasa Suenaga has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains three commits:
>> 
>>  - Fix comments
>>  - Merge
>>  - 8259008: ArithmeticException was thrown at "Monitor Cache Dump" on HSDB
>
> test/hotspot/jtreg/serviceability/sa/TestObjectMonitorIterate.java line 78:
> 
>> 76:         SATestUtils.addPrivilegesIfNeeded(processBuilder);
>> 77:         OutputAnalyzer SAOutput = ProcessTools.executeProcess(processBuilder);
>> 78:         SAOutput.shouldHaveExitValue(0);
> 
> Is it reasonable to expect at least one ObjectMonitor to be found?
> There are a couple of system threads that wait on ObjectMonitors
> so if the target VM runs for a little bit of time, there will be at least
> two contended ObjectMonitors.

Yes, we can see the monitor for reference queue at least.
This test aims to check whether SA can find the monitors.

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PR: https://git.openjdk.java.net/jdk/pull/1910