RFR: JDK-8284977: MetricsTesterCgroupV2.getLongValueEntryFromFile fails when named value doesn't exist

[Matthias Baesken]

On Tue, 14 Jun 2022 20:07:13 GMT, Martin Doerr <mdoerr at openjdk.org> wrote:

> Do we want to fix it in JDK20 only (not 19)? "Bugs of any priority whose fixes only affect tests, or test-problem lists, or documentation may be fixed in RDP 1 and RDP 2." https://openjdk.org/jeps/3#rdp-1

I think we can backport it if needed.

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PR: https://git.openjdk.org/jdk/pull/9153