8303408 : [AIX] Broken jdk8u build after JDK-8266391

[deepa181]

The AIX build fails after JDK-8266391 was backported to jdk8. So, We added null returning SystemMetrics class an aix platform specific class that fixes the build error.

Reported Issue : JDK-8303408

---

Progress

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

Issue

• JDK-8303408: [AIX] Broken jdk8u build after JDK-8266391

Reviewers

• Paul Hohensee (@phohensee - Reviewer)
• Severin Gehwolf (@jerboaa - Reviewer)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk8u pull/33/head:pull/33
$ git checkout pull/33

Update a local copy of the PR:
$ git checkout pull/33
$ git pull https://git.openjdk.org/jdk8u pull/33/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 33

View PR using the GUI difftool:
$ git pr show -t 33

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk8u/pull/33.diff

[bridgekeeper]

👋 Welcome back deepa181! 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.

[mlbridge]

Webrevs

• 00: Full (e8f57425)

[phohensee]

Lgtm.

[openjdk]

@deepa181 This change now passes all automated pre-integration checks.

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

8303408: [AIX] Broken jdk8u build after JDK-8266391

Reviewed-by: phh, sgehwolf

You can use pull request commands such as /summary, /contributor and /issue to adjust it as needed.

At the time when this comment was updated there had been no new commits pushed to the master branch. If another commit should be pushed before you perform the /integrate command, your PR will be automatically rebased. If you prefer to avoid any potential automatic rebasing, please check the documentation for the /integrate command for further details.

As you do not have Committer status in this project an existing Committer must agree to sponsor your change. Possible candidates are the reviewers of this PR (@phohensee, @jerboaa) but any other Committer may sponsor as well.

➡️ To flag this PR as ready for integration with the above commit message, type /integrate in a new comment. (Afterwards, your sponsor types /sponsor in a new comment to perform the integration).

[phohensee]

Tagged the JBS issue.

[deepa181]

Lgtm.

Thank you so much @phohensee for review.

[deepa181]

Tagged the JBS issue.

Okay. Thanks for tagging the JBS issue.

[deepa181]

/integrate

[openjdk]

@deepa181
Your change (at version e8f5742) is now ready to be sponsored by a Committer.

[deepa181]

I want more approvals for this fix before it gets Merge. Thanks .

[jerboaa]

Looks fine. Thanks for the fix!

[jerboaa]

The fix is fine. Metrics is a linux only (cgroups) feature. So returning null is the right thing to do on AIX.

[jerboaa]

/sponsor

[openjdk]

Going to push as commit 4a83729.

[openjdk]

@jerboaa @deepa181 Pushed as commit 4a83729.

💡 You may see a message that your pull request was closed with unmerged commits. This can be safely ignored.

[deepa181]

The fix is fine. Metrics is a linux only (cgroups) feature. So returning null is the right thing to do on AIX.

Thanks @jerboaa for review the code.