[issue14771] Occasional failure in test_ioctl when run parallel with test_gdb

2016-01-15 Thread Roundup Robot 

Roundup Robot added the comment:

New changeset 8b8ac7adbf49 by Martin Panter in branch '2.7':
Issue #14771: Redirect GDB's stdin to avoid messing the terminal settings
https://hg.python.org/cpython/rev/8b8ac7adbf49

New changeset c87cc05af8e7 by Martin Panter in branch '3.5':
Issue #14771: Redirect GDB's stdin to avoid messing the terminal settings
https://hg.python.org/cpython/rev/c87cc05af8e7

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[issue14771] Occasional failure in test_ioctl when run parallel with test_gdb

2016-01-15 Thread Martin Panter 

Changes by Martin Panter :


--
resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed

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[issue14771] Occasional failure in test_ioctl when run parallel with test_gdb

2015-12-06 Thread Martin Panter 

Martin Panter added the comment:

I found that if you redirect GDB’s stdin if fixes all the problems. I don’t 
fully understand what GDB is doing to change the terminal’s foreground process 
group.

In my patch I set stdin to a pipe. It is like using DEVNULL, but should be 
compatible with Python 2 as well.

--
keywords: +patch
nosy: +martin.panter
stage: needs patch -> patch review
versions: +Python 3.5, Python 3.6 -Python 3.2, Python 3.3, Python 3.4
Added file: http://bugs.python.org/file41260/gdb-stdin.patch

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[issue14771] Occasional failure in test_ioctl when run parallel with test_gdb

2014-06-29 Thread Mark Lawrence 

Mark Lawrence added the comment:

@Antoine/Serhiy I believe that you'd want to follow up on this.

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[issue14771] Occasional failure in test_ioctl

2013-01-23 Thread Ezio Melotti 

Changes by Ezio Melotti ezio.melo...@gmail.com:


--
status: open - pending

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[issue14771] Occasional failure in test_ioctl

2013-01-23 Thread Serhiy Storchaka 

Serhiy Storchaka added the comment:

Third argument of ioctl should be not , but a bytes object with platform 
dependent length sizeof(pid_t).

Beside this, the code at the top of the module checks the same condition and 
skip the tests if it is wrong. Race condition happened -- the process has been 
put into the background between executing these two codes. What command line 
you run the test?

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status: pending - open

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[issue14771] Occasional failure in test_ioctl

2013-01-23 Thread Antoine Pitrou 

Antoine Pitrou added the comment:

 Beside this, the code at the top of the module checks the same
 condition and skip the tests if it is wrong. Race condition happened
 -- the process has been put into the background between executing
 these two codes. What command line you run the test?

It happens (or happened) quite often when using the -j option to regrtest.

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[issue14771] Occasional failure in test_ioctl

2013-01-23 Thread Serhiy Storchaka 

Serhiy Storchaka added the comment:

Do you use -r option?

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[issue14771] Occasional failure in test_ioctl

2013-01-23 Thread Antoine Pitrou 

Antoine Pitrou added the comment:

 Serhiy Storchaka added the comment:
 
 Do you use -r option?

No. Usually just -jsomething

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[issue14771] Occasional failure in test_ioctl

2013-01-23 Thread Serhiy Storchaka 

Serhiy Storchaka added the comment:

What is something? Can you please expose several lines of regrtest output 
before and after this error? When /1 appeared?

I suspect test_gdb:

$ ./python -m test.regrtest -j 2 test_gdb test_gdb

[1]+  Stopped ./python -m test.regrtest -j 2 test_gdb test_gdb

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[issue14771] Occasional failure in test_ioctl

2013-01-23 Thread Serhiy Storchaka 

Serhiy Storchaka added the comment:

$ ./python -m test.regrtest -j 2 test_gdb test_ioctl test_ioctl test_ioctl 
test_ioctl test_ioctl test_ioctl test_ioctl test_ioctl test_ioctl
[ 1/10] test_ioctl
[ 2/10] test_ioctl
[ 3/10] test_ioctl
[ 4/10] test_ioctl
[ 5/10] test_ioctl
[ 6/10] test_ioctl
[ 7/10] test_ioctl
[ 8/10] test_ioctl
test_ioctl skipped -- Neither the process group nor the session are attached to 
/dev/tty
[ 9/10] test_ioctl
test_ioctl skipped -- Neither the process group nor the session are attached to 
/dev/tty
[10/10] test_gdb
8 tests OK.
2 tests skipped:
test_ioctl test_ioctl

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[issue14771] Occasional failure in test_ioctl

2013-01-23 Thread Serhiy Storchaka 

Serhiy Storchaka added the comment:

$ ./python -m test.regrtest -j 4 test_gdb test_ioctl test_ioctl test_ioctl 
test_ioctl test_ioctl test_ioctl test_ioctl test_ioctl test_ioctl test_ioctl 
test_ioctl test_ioctl test_ioctl test_ioctl test_ioctl test_ioctl test_ioctl 
test_ioctl test_ioctl
[ 1/20] test_ioctl
[ 2/20] test_ioctl
[ 3/20] test_ioctl
[ 4/20] test_ioctl
[ 5/20] test_ioctl
[ 6/20] test_ioctl
[ 7/20] test_ioctl
[ 8/20] test_ioctl
[ 9/20] test_ioctl
[10/20] test_ioctl
[11/20] test_ioctl
[12/20] test_ioctl
[13/20] test_ioctl
[14/20] test_ioctl
[15/20] test_ioctl
[16/20] test_ioctl
[17/20] test_ioctl
[18/20] test_ioctl
test_ioctl skipped -- Neither the process group nor the session are attached to 
/dev/tty
[19/20] test_ioctl
[20/20/1] test_gdb
test test_gdb failed -- Traceback (most recent call last):
  File /home/serhiy/py/cpython/Lib/test/test_gdb.py, line 716, in test_threads
cmds_after_breakpoint=['thread apply all py-bt'])
  File /home/serhiy/py/cpython/Lib/test/test_gdb.py, line 170, in 
get_stack_trace
self.assertEqual(err, '')
AssertionError: 'Error occurred in Python command.\n' != ''
- Error occurred in Python command.
18 tests OK.
1 test failed:
test_gdb
1 test skipped:
test_ioctl

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[issue14771] Occasional failure in test_ioctl

2013-01-23 Thread Serhiy Storchaka 

Serhiy Storchaka added the comment:

Bingo!

$ ./python -m test.regrtest -j 4 test_gdb test_ioctl test_ioctl test_ioctl 
test_ioctl test_ioctl test_ioctl test_ioctl test_ioctl test_ioctl test_ioctl 
test_ioctl test_ioctl test_ioctl test_ioctl test_ioctl test_ioctl test_ioctl 
test_ioctl test_ioctl
[ 1/20] test_ioctl
[ 2/20] test_ioctl
[ 3/20] test_ioctl
[ 4/20] test_ioctl
[ 5/20] test_ioctl
[ 6/20] test_ioctl
[ 7/20] test_ioctl
[ 8/20] test_ioctl
[ 9/20] test_ioctl
test_ioctl skipped -- Neither the process group nor the session are attached to 
/dev/tty
[10/20] test_ioctl
[11/20/1] test_ioctl
test test_ioctl failed -- Traceback (most recent call last):
  File /home/serhiy/py/cpython/Lib/test/test_ioctl.py, line 66, in 
test_ioctl_mutate_2048
self._check_ioctl_mutate_len(2048)
  File /home/serhiy/py/cpython/Lib/test/test_ioctl.py, line 54, in 
_check_ioctl_mutate_len
self.assertIn(rpgrp, ids)
AssertionError: 14270 not found in (14225, 4030)
[12/20/1] test_ioctl
test_ioctl skipped -- Neither the process group nor the session are attached to 
/dev/tty
[13/20/1] test_ioctl
[14/20/1] test_ioctl
[15/20/1] test_ioctl
[16/20/1] test_ioctl
[17/20/1] test_ioctl
test_ioctl skipped -- Neither the process group nor the session are attached to 
/dev/tty
[18/20/1] test_ioctl
[19/20/1] test_ioctl
[20/20/1] test_gdb
16 tests OK.
1 test failed:
test_ioctl
3 tests skipped:
test_ioctl test_ioctl test_ioctl

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[issue14771] Occasional failure in test_ioctl

2013-01-23 Thread Antoine Pitrou 

Antoine Pitrou added the comment:

Nice catch, Serhiy. I wouldn't have suspected test_gdb.

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[issue14771] Occasional failure in test_ioctl when run parallel with test_gdb

2013-01-23 Thread Antoine Pitrou 

Changes by Antoine Pitrou pit...@free.fr:


--
stage:  - needs patch
title: Occasional failure in test_ioctl - Occasional failure in test_ioctl 
when run parallel with test_gdb
versions: +Python 3.4

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[issue14771] Occasional failure in test_ioctl when run parallel with test_gdb

2013-01-23 Thread Serhiy Storchaka 

Serhiy Storchaka added the comment:

Perhaps we need a possibility to mark a test that it can't run in parallel. 
I suspect some multiprocess tests fail for same reason.

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[issue14771] Occasional failure in test_ioctl when run parallel with test_gdb

2013-01-23 Thread Antoine Pitrou 

Antoine Pitrou added the comment:

 Perhaps we need a possibility to mark a test that it can't run in parallel. 
 I suspect some multiprocess tests fail for same reason.

Well, first I would like to know what the underlying problem is.
-j doesn't use multiprocessing, it spawns standalone processes using the 
subprocess module.

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[issue14771] Occasional failure in test_ioctl when run parallel with test_gdb

2013-01-23 Thread Antoine Pitrou 

Antoine Pitrou added the comment:

Ah, I see, that's because of the Skip if another process is in foreground 
thing?

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[issue14771] Occasional failure in test_ioctl when run parallel with test_gdb

2013-01-23 Thread Antoine Pitrou 

Antoine Pitrou added the comment:

Given what _check_ioctl_mutate_len() seems to be designed to check, perhaps we 
should relax:

self.assertIn(rpgrp, ids)

into:

self.assertNotEqual(rpgrp, fill)

or perhaps simply:

self.assertGreater(rpgrp, 0)

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[issue14771] Occasional failure in test_ioctl when run parallel with test_gdb

2013-01-23 Thread Antoine Pitrou 

Antoine Pitrou added the comment:

Ah, and the test_ioctl() method needs to be fixed too.

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[issue14771] Occasional failure in test_ioctl

2012-09-26 Thread Ezio Melotti 

Ezio Melotti added the comment:

Can you still reproduce this issue? Do you use any specific flag to run the 
tests? What OS is this?
I tried on linux, solaris, and aix with ``./python -m test -F test_ioctl`` for 
about 1k loops, and couldn't reproduce the issue.

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[issue14771] Occasional failure in test_ioctl

2012-05-10 Thread Antoine Pitrou 

New submission from Antoine Pitrou pit...@free.fr:

This happens from time to time on my desktop computer:

[151/354/1] test_ioctl
test test_ioctl failed -- Traceback (most recent call last):
  File /home/antoine/cpython/32/Lib/test/test_ioctl.py, line 36, in test_ioctl
self.assertIn(rpgrp, ids)
AssertionError: 25242 not found in (23865, 23615)

--
components: Library (Lib), Tests
messages: 160357
nosy: neologix, pitrou
priority: low
severity: normal
status: open
title: Occasional failure in test_ioctl
type: behavior
versions: Python 2.7, Python 3.2, Python 3.3

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