Bug 55087 – webkitpy.layout_tests.layout_package.manager_worker_broker_unittest.FunctionTests.test_get__processes sometimes fails on Windows

• Component: Tools / Tests
• Status: RESOLVED FIXED

[Adam Roben (:aroben)]

webkitpy.layout_tests.layout_package.manager_worker_broker_unittest.FunctionTests.test_get__processes is sometimes failing on Windows. For example:

Did not fail: http://build.webkit.org/builders/Windows%207%20Release%20%28Tests%29/builds/9673
Did fail: http://build.webkit.org/builders/Windows%207%20Release%20%28Tests%29/builds/9679

So far I've only seen it fail on apple-windows-5, which is running Python 2.6.5. I believe apple-windows-6 is running Python 2.5.x.

[Dirk Pranke]

Hm. That test is showing python-level failures in the "multiprocessing" module, which is only available under Python 2.6. So that test won't run (or fail) under 2.5.

We'll have to watch it to see how flaky it is ...

[Adam Roben (:aroben)]

Another failure: http://build.webkit.org/builders/Windows%207%20Release%20%28Tests%29/builds/9691/steps/webkitpy-test/logs/stdio

[Adam Roben (:aroben)]

More failures:

http://build.webkit.org/builders/Windows%207%20Release%20%28Tests%29/builds/9662
http://build.webkit.org/builders/Windows%207%20Release%20%28Tests%29/builds/9671

So it failed 4 times from build 9662 to build 9691, inclusive. That's once every 7 builds or so.

[Adam Roben (:aroben)]

<rdar://problem/9059908>

[Adam Roben (:aroben)]

We've been seeing cases where lots of python processes are left around on the bots. I wonder if this bug is the/a cause of that?

[Dirk Pranke]

(In reply to comment #5)
> We've been seeing cases where lots of python processes are left around on the bots. I wonder if this bug is the/a cause of that?

It's quite possible. When I briefly had the multiprocessing module enabled for new-run-webkit-tests, we also seemed to see a bunch of processes lying around. 

I think I'll disable this test for now until I can do some more testing on Windows and see if there are bugs I can reproduce/triage/fix.

[Dirk Pranke]

Assigning to myself and skipping for now until I can triage it further.

[Dirk Pranke]

Created attachment 84152 [details]
Patch

[Dirk Pranke]

I don't like skipping tests ... anyone have any ideas before I disable it?

[Adam Roben (:aroben)]

Skipped the test on Windows to get the bots green

Committed r79993: <http://trac.webkit.org/changeset/79993>

[WebKit Review Bot]

http://trac.webkit.org/changeset/79993 might have broken GTK Linux 32-bit Debug

[Dirk Pranke]

clearing ownership now that I've disabled the bug, in the off chance that someone else wants to take this.

[Eric Seidel (no email)]

Attachment 84152 [details] was posted by a committer and has review+, assigning to Dirk Pranke for commit.

[Dirk Pranke]

It looks like aroben landed this in r79993. Closing.

[Raphael Kubo da Costa (:rakuco)]

Has this been further investigated? I was looking at eliminating more uses of sys.platform and came across this one.

[Dirk Pranke]

Nope, I haven't had a chance to look into it further, and it's not super-high on my priority list.