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

[jmtd]

I'd like to backport this to jdk11u-dev. It fixes a test failure caused due to expected cgroups virtual files (nr_quota etc) not existing in some circumstances/some systems. The patch cherry picks clean, touches one test library file, which is exercised by running ./test/jdk/jdk/internal/platform/cgroup/TestCgroupMetrics.java, which fails in current 11u-dev and passes after this patch.

---

Progress

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Issue

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

Reviewing

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Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk11u-dev pull/1379/head:pull/1379
$ git checkout pull/1379

Update a local copy of the PR:
$ git checkout pull/1379
$ git pull https://git.openjdk.org/jdk11u-dev pull/1379/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 1379

View PR using the GUI difftool:
$ git pr show -t 1379

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Download this PR as a diff file:
https://git.openjdk.org/jdk11u-dev/pull/1379.diff

[bridgekeeper]

👋 Welcome back jdowland! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

This backport pull request has now been updated with issue from the original commit.

[openjdk]

@jmtd This change now passes all automated pre-integration checks.

After integration, the commit message for the final commit will be:

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

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[mlbridge]

Webrevs

• 00: Full (85e075f4)

[jmtd]

/integrate

[openjdk]

Going to push as commit 378b516.
Since your change was applied there has been 1 commit pushed to the master branch:

• 5944581: 8285836: sun/net/www/http/KeepAliveCache/KeepAliveProperty.java failed with "RuntimeException: Failed in server"

Your commit was automatically rebased without conflicts.

[openjdk]

@jmtd Pushed as commit 378b516.

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