os/exec: flaky TestExtraFilesFDShuffle is disabled

[gopherbot]

by capnm9:

hg id
29818ed2e3f7 tip

uname -a
Linux rpi 3.6.11+ #456 PREEMPT Mon May 20 17:42:15 BST 2013 armv6l GNU/Linux

ok      os  2.776s
--- FAIL: TestExtraFilesFDShuffle (0.14 seconds)
    exec_test.go:248: bad test value for test pipe: fd 4
    exec_test.go:278: bad test value for stderr pipe
FAIL
FAIL    os/exec 5.216s
ok      os/signal   0.764s

(not sure which commit brought this)

[alberts]

Comment 1:

This happened here:
https://code.google.com/p/go/source/detail?r=600c5389c9d3
Discussed it here:
https://golang.org/cl/9103045
No feedback from the original author/committer though.

[gopherbot]

Comment 2 by capnm9:

In context of #1:
It failed by running ./all.bash without any environment changes.
The failure was 100% reproducible but is now gone after
reboot.
The system was up about 2 weeks. I did't found anything unusual.

[gopherbot]

Comment 3 by capnm9:

It happened again:
uptime
 09:07:00 up 1 day, 13:30,  2 users,  load average: 0,00, 0,01, 0,05
hg id
c96951f239c0 tip
1) At some point in time all.bash starts failing in this test.
2) After a reboot all.bash runs successfully again, goto 1)
This is weird. There are no stalled processes or extra allocated RAM.
@fullung Do you have an idea where I should look?

[alberts]

Comment 4:

I haven't had time to look at it in detail, but I'm pretty sure the test is closing file
descriptors it shouldn't.

[davecheney]

Comment 5:

--- FAIL: TestExtraFilesFDShuffle (0.02 seconds)
        exec_test.go:247: bad test value for test pipe: fd 4
        exec_test.go:277: bad test value for stderr pipe
FAIL
FAIL    os/exec 0.336s
Happened twice in a row on linux/amd64
% hg id
fd0b7333b96b+ tip
Marking as Soon / 1.2 because it will eventually start to cause our builders to fail.

Labels changed: added priority-soon, go1.2, removed priority-triage.

Status changed to Accepted.

[dsymonds]

Comment 6:

Owner changed to @bradfitz.

[lexprfuncall]

Comment 7:

This issue was updated by revision 221eef6.

R=golang-dev, cshapiro, dave, bradfitz
CC=golang-dev
https://golang.org/cl/12869049

[bradfitz]

Comment 8:

Removing Go1.2 label. The test is now disabled.
This bug is now about making the test not flaky and re-enabling it.

Labels changed: added priority-someday, removed priority-soon, go1.2.

[rsc]

Comment 9:

Labels changed: added go1.3maybe.

[rsc]

Comment 10:

Labels changed: added release-none, removed go1.3maybe.

[rsc]

Comment 11:

Labels changed: added repo-main.

[bradfitz]

Comment 12:

Owner changed to ---.