8278102: containers/docker/TestJcmd.java failed with "RuntimeException: Could not find specified process"

[rm-gh-8]

Backporting JDK-8278102: containers/docker/TestJcmd.java failed with "RuntimeException: Could not find specified process".

This PR re-enables the TestJcmd.java Docker container test (previously disabled via ProblemList for bug 8278102) by fixing its reliability issues.

This PR is not clean due to a conflict in the problem list (no change needed) and a trivial difference (root user check) in a section that was deleted as part of this PR.

For parity with Oracle JDK. Already backported to 21.

Ran related test on linux-x64:

sudo ../jtreg/build/images/jtreg/bin/jtreg -jdk:build/linux-x86_64-server-release/images/jdk -Drequires.container.support=true test/hotspot/jtreg/containers/docker/TestJcmd.java

Results:

test result: Passed. Execution successful

TestJcmd.jtr.txt

---

• I confirm that I make this contribution in accordance with the OpenJDK Interim AI Policy.

---

Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
• JDK-8278102 needs maintainer approval
• Commit message must refer to an issue

Issue

• JDK-8278102: containers/docker/TestJcmd.java failed with "RuntimeException: Could not find specified process" (Bug - P4 - Requested)

Reviewers

• Paul Hohensee (@phohensee - Reviewer)

Reviewing

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[bridgekeeper]

👋 Welcome back rmesde! 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 change is not yet ready to be integrated.
See the Progress checklist in the description for automated requirements.

[openjdk]

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

[mlbridge]

Webrevs

• 00: Full (d7833f3f)

[openjdk]

⚠️ @rm-gh-8 This change is now ready for you to apply for maintainer approval. This can be done directly in each associated issue or by using the /approval command.

[rm-gh-8]

/approval request for backport of JDK-8278102: containers/docker/TestJcmd.java failed with "RuntimeException: Could not find specified process".

This is a test fix.

For parity with Oracle JDK. Already backported to 21.

[openjdk]

@rm-gh-8
8278102: The approval request has been created successfully.