[Bug 1096269] New: lost signals when sending lots of signals using --sig-proxy to docker

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Red Hat Bugzilla

9 May 2014 9 May '14

11:32 p.m.

https://bugzilla.redhat.com/show_bug.cgi?id=1096269

Bug ID: 1096269 Summary: lost signals when sending lots of signals using --sig-proxy to docker Product: Red Hat Enterprise Linux 7 Version: 7.1 Component: docker Assignee: lsm5@redhat.com Reporter: ldoktor@redhat.com QA Contact: virt-bugs@redhat.com CC: admiller@redhat.com, golang@lists.fedoraproject.org, lsm5@redhat.com, mattdm@redhat.com, mgoldman@redhat.com, skottler@redhat.com, vbatts@redhat.com Depends On: 1087700

+++ This bug was initially created as a clone of Bug #1087700 +++

Description of problem: When I send lots of signals to the running docker with --sig-proxy (actual kill signals, not `docker kill`), most of them got lost.

Version-Release number of selected component (if applicable): docker-0.10.0-8.el7.x86_64 docker-io-0.9.1-1.fc21.x86_64

How reproducible: always

Steps to Reproduce: 1. /usr/bin/docker -D run --tty=false --rm -i --name test_eoly localhost:5000/ldoktor/fedora:latest bash -c 'for NUM in `seq 1 64`; do trap "echo Received $NUM, ignoring..." $NUM; done; while :; do sleep 1; done' 2. ps ax |grep docker 3. for AAA in `seq 1 32`; do [ $AAA -ne 9 ] && [ $AAA -ne 20 ] && [ $AAA -ne 19 ] && kill -s $AAA $PID; done

Actual results: Output of the docker is: Received 1, ignoring... Received 2, ignoring...

Expected results: Messages for all of the `Received $NUM, ignoring...` printed (order doesn't matter)

Additional info: Skipping 9, 19, 20 as they are a bit too special..

--- Additional comment from Lukas Doktor on 2014-05-05 04:10:09 EDT ---

The same results with upstream docker dc9c28f/0.10.0:

Output: Received 1, ignoring... [debug] stdcopy.go:111 framesize: 24 Received 2, ignoring...

Daemon output: 2014/05/05 10:08:45 POST /v1.10/containers/b01a849cb45ebe94c3a61fa021a5464186345d5b159faee4ea9d5da39fb36de5/kill?signal=HUP [/home/medic/Work/Projekty/Docker/root|fa3816b6] +job kill(b01a849cb45ebe94c3a61fa021a5464186345d5b159faee4ea9d5da39fb36de5, HUP) [/home/medic/Work/Projekty/Docker/root|fa3816b6] -job kill(b01a849cb45ebe94c3a61fa021a5464186345d5b159faee4ea9d5da39fb36de5, HUP) = OK (0) 2014/05/05 10:08:45 POST /v1.10/containers/b01a849cb45ebe94c3a61fa021a5464186345d5b159faee4ea9d5da39fb36de5/kill?signal=INT [/home/medic/Work/Projekty/Docker/root|fa3816b6] +job kill(b01a849cb45ebe94c3a61fa021a5464186345d5b159faee4ea9d5da39fb36de5, INT) [/home/medic/Work/Projekty/Docker/root|fa3816b6] -job kill(b01a849cb45ebe94c3a61fa021a5464186345d5b159faee4ea9d5da39fb36de5, INT) = OK (0)

Referenced Bugs:

https://bugzilla.redhat.com/show_bug.cgi?id=1087700 [Bug 1087700] lost signals when sending lots of signals using --sig-proxy to docker

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Red Hat Bugzilla

13 May 13 May

4:31 a.m.

New subject: [Bug 1096269] lost signals when sending lots of signals using --sig-proxy to docker

https://bugzilla.redhat.com/show_bug.cgi?id=1096269

Chris Evich cevich@redhat.com changed:

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Red Hat Bugzilla

20 May 20 May

5:01 a.m.

New subject: [Bug 1096269] lost signals when sending lots of signals using --sig-proxy to docker

https://bugzilla.redhat.com/show_bug.cgi?id=1096269

Daniel Walsh dwalsh@redhat.com changed:

What |Removed |Added ---------------------------------------------------------------------------- CC| |dwalsh@redhat.com

--- Comment #3 from Daniel Walsh dwalsh@redhat.com --- I added a sleep of 1 second before sending the signal and I got.

# /usr/bin/docker run --sig-proxy --rm --tty=false -i fedora bash -c 'for NUM in `seq 1 64`; do trap "echo Received $NUM, ignoring..." $NUM; done; while :; do sleep 1; done' Received 1, ignoring... Received 2, ignoring... Received 3, ignoring... Received 4, ignoring... Received 5, ignoring... Received 6, ignoring... Received 7, ignoring... Received 8, ignoring... Received 10, ignoring... Received 11, ignoring... Received 12, ignoring... Received 13, ignoring... Received 14, ignoring... Received 15, ignoring... Received 16, ignoring... Received 21, ignoring... Received 22, ignoring... Received 23, ignoring... Received 24, ignoring... Received 25, ignoring... Received 26, ignoring... Received 28, ignoring... Received 29, ignoring... Received 30, ignoring... Received 31, ignoring...

for AAA in `seq 1 32`; do [ $AAA -ne 9 ] && [ $AAA -ne 20 ] && [ $AAA -ne 19 ] && sleep 1 && echo $AAA && kill -s $AAA 2041; done

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Red Hat Bugzilla

5:03 a.m.

New subject: [Bug 1096269] lost signals when sending lots of signals using --sig-proxy to docker

https://bugzilla.redhat.com/show_bug.cgi?id=1096269

--- Comment #4 from Daniel Walsh dwalsh@redhat.com --- These are missing

#define SIGCHLD 17 /* Child status has changed (POSIX). */ #define SIGCONT 18 /* Continue (POSIX). */

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Red Hat Bugzilla

5:05 a.m.

New subject: [Bug 1096269] lost signals when sending lots of signals using --sig-proxy to docker

https://bugzilla.redhat.com/show_bug.cgi?id=1096269

--- Comment #5 from Daniel Walsh dwalsh@redhat.com --- #define SIGPROF 27 /* Profiling alarm clock (4.2 BSD). */ Also missing.

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Red Hat Bugzilla

5:12 a.m.

New subject: [Bug 1096269] lost signals when sending lots of signals using --sig-proxy to docker

https://bugzilla.redhat.com/show_bug.cgi?id=1096269

--- Comment #6 from Daniel Walsh dwalsh@redhat.com --- bash -c 'for NUM in `seq 1 64`; do trap "echo Received $NUM, ignoring..." $NUM; done; while :; do sleep 1; done'Received 1, ignoring... Received 2, ignoring... Received 3, ignoring... Received 4, ignoring... Received 5, ignoring... Received 6, ignoring... Received 7, ignoring... Received 8, ignoring... Received 10, ignoring... Received 11, ignoring... Received 12, ignoring... Received 13, ignoring... Received 14, ignoring... Received 15, ignoring... Received 16, ignoring... Received 18, ignoring... Received 21, ignoring... Received 22, ignoring... Received 23, ignoring... Received 24, ignoring... Received 25, ignoring... Received 26, ignoring... Received 27, ignoring... Received 28, ignoring... Received 29, ignoring... Received 30, ignoring... Received 31, ignoring... Unknown signal 32

Running test against bash shows missing 17

Why 18 and 27 don't show I have no idea.

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Red Hat Bugzilla

4 Jun 4 Jun

5:33 a.m.

New subject: [Bug 1096269] lost signals when sending lots of signals using --sig-proxy to docker

https://bugzilla.redhat.com/show_bug.cgi?id=1096269

Daniel Walsh dwalsh@redhat.com changed:

What |Removed |Added ---------------------------------------------------------------------------- Depends On| |1087697

Referenced Bugs:

https://bugzilla.redhat.com/show_bug.cgi?id=1087697 [Bug 1087697] man page inaccuracy about --sig-proxy and --tty

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Red Hat Bugzilla

5:33 a.m.

New subject: [Bug 1096269] lost signals when sending lots of signals using --sig-proxy to docker

https://bugzilla.redhat.com/show_bug.cgi?id=1096269 Bug 1096269 depends on bug 1087700, which changed state.

Bug 1087700 Summary: lost signals when sending lots of signals using --sig-proxy to docker https://bugzilla.redhat.com/show_bug.cgi?id=1087700

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Red Hat Bugzilla

9:45 p.m.

New subject: [Bug 1096269] lost signals when sending lots of signals using --sig-proxy to docker

https://bugzilla.redhat.com/show_bug.cgi?id=1096269 Bug 1096269 depends on bug 1087700, which changed state.

Bug 1087700 Summary: lost signals when sending lots of signals using --sig-proxy to docker https://bugzilla.redhat.com/show_bug.cgi?id=1087700

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Red Hat Bugzilla

18 Jun 18 Jun

4:13 a.m.

New subject: [Bug 1096269] lost signals when sending lots of signals using --sig-proxy to docker

https://bugzilla.redhat.com/show_bug.cgi?id=1096269

Daniel Walsh dwalsh@redhat.com changed:

What |Removed |Added ---------------------------------------------------------------------------- Assignee|lsm5@redhat.com |mheon@redhat.com

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Red Hat Bugzilla

19 Jun 19 Jun

12:21 a.m.

New subject: [Bug 1096269] lost signals when sending lots of signals using --sig-proxy to docker

https://bugzilla.redhat.com/show_bug.cgi?id=1096269

--- Comment #7 from Matthew Heon mheon@redhat.com --- I've identified the root cause of this. Docker uses a buffer to store incoming signals before sending them to the (https://github.com/dotcloud/docker/blob/master/api/client/commands.go#L538). This buffer is, in current versions of Docker, size 1 - multiple signals arriving near-simultaneously will overwrite one another. I've submitted a pull request to increase the size of the buffer (https://github.com/dotcloud/docker/pull/6508).

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Red Hat Bugzilla

23 Jun 23 Jun

9:39 p.m.

New subject: [Bug 1096269] lost signals when sending lots of signals using --sig-proxy to docker

https://bugzilla.redhat.com/show_bug.cgi?id=1096269

Daniel Walsh dwalsh@redhat.com changed:

What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |ASSIGNED

--- Comment #8 from Daniel Walsh dwalsh@redhat.com --- Is this fixed in docker-1.0 for RHEL7?

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Red Hat Bugzilla

9:40 p.m.

New subject: [Bug 1096269] lost signals when sending lots of signals using --sig-proxy to docker

https://bugzilla.redhat.com/show_bug.cgi?id=1096269

--- Comment #9 from Matthew Heon mheon@redhat.com --- No, patch is not in docker-1.0

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Red Hat Bugzilla

24 Jun 24 Jun

4:26 a.m.

New subject: [Bug 1096269] lost signals when sending lots of signals using --sig-proxy to docker

https://bugzilla.redhat.com/show_bug.cgi?id=1096269

--- Comment #10 from Daniel Walsh dwalsh@redhat.com --- Ok lets get it in.

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Red Hat Bugzilla

25 Jun 25 Jun

11:12 p.m.

New subject: [Bug 1096269] lost signals when sending lots of signals using --sig-proxy to docker

https://bugzilla.redhat.com/show_bug.cgi?id=1096269

Matthew Heon mheon@redhat.com changed:

--- Comment #11 from Matthew Heon mheon@redhat.com --- Patch is in our builds of docker-1.0

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Red Hat Bugzilla

18 Jul 18 Jul

4:59 p.m.

New subject: [Bug 1096269] lost signals when sending lots of signals using --sig-proxy to docker

https://bugzilla.redhat.com/show_bug.cgi?id=1096269

Lukas Doktor ldoktor@redhat.com changed:

What |Removed |Added ---------------------------------------------------------------------------- Status|MODIFIED |ASSIGNED

--- Comment #12 from Lukas Doktor ldoktor@redhat.com --- I'm sorry to report but the problem persists on docker-1.0.0-10.el7.x86_64:

output without additional sleep: [debug] stdcopy.go:111 framesize: 48 Received 1, ignoring... Received 8, ignoring...

output with sleep 0.1: [debug] stdcopy.go:111 framesize: 24 Received 1, ignoring... [debug] stdcopy.go:111 framesize: 218 Received 3, ignoring... Received 4, ignoring... Received 5, ignoring... Received 6, ignoring... Received 7, ignoring... Received 8, ignoring... Received 10, ignoring... Received 11, ignoring... Received 2, ignoring... [debug] stdcopy.go:111 framesize: 125 Received 12, ignoring... Received 13, ignoring... Received 14, ignoring... Received 15, ignoring... Received 16, ignoring... [debug] stdcopy.go:111 framesize: 225 Received 21, ignoring... Received 22, ignoring... Received 23, ignoring... Received 24, ignoring... Received 25, ignoring... Received 26, ignoring... Received 28, ignoring... Received 29, ignoring... Received 30, ignoring... [debug] stdcopy.go:111 framesize: 25 Received 31, ignoring...

The received signals numbers differs with runs, but number of received signals is between 1-4.

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Red Hat Bugzilla

21 Jul 21 Jul

4:22 p.m.

New subject: [Bug 1096269] lost signals when sending lots of signals using --sig-proxy to docker

https://bugzilla.redhat.com/show_bug.cgi?id=1096269

Lukas Doktor ldoktor@redhat.com changed:

What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |VERIFIED

--- Comment #14 from Lukas Doktor ldoktor@redhat.com --- OK, today I tried the docker-1.1.1-1.el7.x86_64 and it works perfectly. Thanks

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Red Hat Bugzilla

13 Sep 13 Sep

2:34 a.m.

New subject: [Bug 1096269] lost signals when sending lots of signals using --sig-proxy to docker

https://bugzilla.redhat.com/show_bug.cgi?id=1096269

Daniel Walsh dwalsh@redhat.com changed:

What |Removed |Added ---------------------------------------------------------------------------- Blocks| |1109938

Referenced Bugs:

https://bugzilla.redhat.com/show_bug.cgi?id=1109938 [Bug 1109938] update docker to 1.1.2

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Red Hat Bugzilla

17 Sep 17 Sep

11:39 p.m.

New subject: [Bug 1096269] lost signals when sending lots of signals using --sig-proxy to docker

https://bugzilla.redhat.com/show_bug.cgi?id=1096269

Bhavna Sarathy bsarathy@redhat.com changed:

What |Removed |Added ---------------------------------------------------------------------------- CC| |bsarathy@redhat.com

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Red Hat Bugzilla

19 Sep 19 Sep

5:31 a.m.

New subject: [Bug 1096269] lost signals when sending lots of signals using --sig-proxy to docker

https://bugzilla.redhat.com/show_bug.cgi?id=1096269

errata-xmlrpc errata-xmlrpc@redhat.com changed:

What |Removed |Added ---------------------------------------------------------------------------- Status|VERIFIED |RELEASE_PENDING

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Red Hat Bugzilla

5:45 a.m.

New subject: [Bug 1096269] lost signals when sending lots of signals using --sig-proxy to docker

https://bugzilla.redhat.com/show_bug.cgi?id=1096269

errata-xmlrpc errata-xmlrpc@redhat.com changed:

--- Comment #16 from errata-xmlrpc errata-xmlrpc@redhat.com --- Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA.

For information on the advisory, and where to find the updated files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHBA-2014-1266.html

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Red Hat Bugzilla

24 Mar 24 Mar

2:16 a.m.

New subject: [Bug 1096269] lost signals when sending lots of signals using --sig-proxy to docker

https://bugzilla.redhat.com/show_bug.cgi?id=1096269

Chris Evich cevich@redhat.com changed:

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Red Hat Bugzilla

30 Jun 30 Jun

10:28 a.m.

New subject: [Bug 1096269] lost signals when sending lots of signals using --sig-proxy to docker

https://bugzilla.redhat.com/show_bug.cgi?id=1096269 Bug 1096269 depends on bug 1087697, which changed state.

Bug 1087697 Summary: man page inaccuracy about --sig-proxy and --tty https://bugzilla.redhat.com/show_bug.cgi?id=1087697

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