| 2012-07-02 20:39:44 |
James Troup |
bug |
|
|
added bug |
| 2012-07-02 20:39:54 |
James Troup |
bug |
|
|
added subscriber The Canonical Sysadmins |
| 2012-07-02 20:49:59 |
Joseph Salisbury |
linux (Ubuntu): importance |
Undecided |
Medium |
|
| 2012-07-02 20:50:27 |
Joseph Salisbury |
tags |
|
kernel-da-key lucid precise |
|
| 2012-07-02 20:58:11 |
Leann Ogasawara |
linux (Ubuntu): importance |
Medium |
Undecided |
|
| 2012-07-02 20:58:11 |
Leann Ogasawara |
linux (Ubuntu): status |
New |
Triaged |
|
| 2012-07-02 20:58:11 |
Leann Ogasawara |
linux (Ubuntu): assignee |
|
Canonical Kernel Team (canonical-kernel-team) |
|
| 2012-07-02 20:58:22 |
Leann Ogasawara |
linux (Ubuntu): importance |
Undecided |
Medium |
|
| 2012-07-02 21:35:31 |
Mark Russell |
bug |
|
|
added subscriber Canonical Support |
| 2012-07-03 00:04:20 |
Nobuto Murata |
bug |
|
|
added subscriber Nobuto MURATA |
| 2012-07-03 00:20:37 |
abiru |
bug |
|
|
added subscriber abiru |
| 2012-07-03 00:36:25 |
Haw Loeung |
bug |
|
|
added subscriber Canonical WebOps |
| 2012-07-03 02:05:32 |
Steve Langasek |
nominated for series |
|
Ubuntu Lucid |
|
| 2012-07-03 02:05:32 |
Steve Langasek |
bug task added |
|
linux (Ubuntu Lucid) |
|
| 2012-07-03 02:05:32 |
Steve Langasek |
nominated for series |
|
Ubuntu Natty |
|
| 2012-07-03 02:05:32 |
Steve Langasek |
bug task added |
|
linux (Ubuntu Natty) |
|
| 2012-07-03 02:05:32 |
Steve Langasek |
nominated for series |
|
Ubuntu Oneiric |
|
| 2012-07-03 02:05:32 |
Steve Langasek |
bug task added |
|
linux (Ubuntu Oneiric) |
|
| 2012-07-03 02:05:32 |
Steve Langasek |
nominated for series |
|
Ubuntu Precise |
|
| 2012-07-03 02:05:32 |
Steve Langasek |
bug task added |
|
linux (Ubuntu Precise) |
|
| 2012-07-03 02:05:32 |
Steve Langasek |
nominated for series |
|
Ubuntu Quantal |
|
| 2012-07-03 02:05:32 |
Steve Langasek |
bug task added |
|
linux (Ubuntu Quantal) |
|
| 2012-07-03 07:58:46 |
Robie Basak |
bug |
|
|
added subscriber Robie Basak |
| 2012-07-03 09:50:16 |
Andy Whitcroft |
linux (Ubuntu Precise): importance |
Undecided |
Medium |
|
| 2012-07-03 09:50:20 |
Andy Whitcroft |
linux (Ubuntu Oneiric): importance |
Undecided |
Medium |
|
| 2012-07-03 09:50:22 |
Andy Whitcroft |
linux (Ubuntu Natty): importance |
Undecided |
Medium |
|
| 2012-07-03 09:50:25 |
Andy Whitcroft |
linux (Ubuntu Lucid): importance |
Undecided |
Medium |
|
| 2012-07-03 09:50:29 |
Andy Whitcroft |
linux (Ubuntu Quantal): assignee |
Canonical Kernel Team (canonical-kernel-team) |
Andy Whitcroft (apw) |
|
| 2012-07-03 11:37:19 |
Andy Whitcroft |
linux (Ubuntu Quantal): assignee |
Andy Whitcroft (apw) |
Brad Figg (brad-figg) |
|
| 2012-07-03 11:37:28 |
Andy Whitcroft |
linux (Ubuntu Quantal): status |
Triaged |
In Progress |
|
| 2012-07-03 13:44:10 |
Joseph Salisbury |
linux (Ubuntu Precise): status |
New |
Confirmed |
|
| 2012-07-03 13:44:15 |
Joseph Salisbury |
linux (Ubuntu Precise): status |
Confirmed |
Triaged |
|
| 2012-07-03 13:44:31 |
Joseph Salisbury |
linux (Ubuntu Oneiric): status |
New |
Triaged |
|
| 2012-07-03 13:44:34 |
Joseph Salisbury |
linux (Ubuntu Natty): status |
New |
Triaged |
|
| 2012-07-03 13:44:36 |
Joseph Salisbury |
linux (Ubuntu Lucid): status |
New |
Triaged |
|
| 2012-07-03 13:44:48 |
Joseph Salisbury |
tags |
kernel-da-key lucid precise |
kernel-da-key kernel-key lucid precise |
|
| 2012-07-03 16:13:01 |
Brad Figg |
linux (Ubuntu Lucid): assignee |
|
Brad Figg (brad-figg) |
|
| 2012-07-03 16:13:05 |
Brad Figg |
linux (Ubuntu Natty): assignee |
|
Brad Figg (brad-figg) |
|
| 2012-07-03 16:13:08 |
Brad Figg |
linux (Ubuntu Oneiric): assignee |
|
Brad Figg (brad-figg) |
|
| 2012-07-03 16:13:10 |
Brad Figg |
linux (Ubuntu Precise): assignee |
|
Brad Figg (brad-figg) |
|
| 2012-07-03 17:05:11 |
Steve Langasek |
bug task added |
|
base-files (Ubuntu) |
|
| 2012-07-03 17:45:18 |
Launchpad Janitor |
branch linked |
|
lp:ubuntu/base-files |
|
| 2012-07-03 18:00:13 |
Launchpad Janitor |
base-files (Ubuntu Quantal): status |
New |
Fix Released |
|
| 2012-07-03 18:25:30 |
Adam Conrad |
base-files (Ubuntu Precise): status |
New |
Fix Committed |
|
| 2012-07-03 18:25:33 |
Adam Conrad |
linux (Ubuntu Precise): status |
Triaged |
Fix Committed |
|
| 2012-07-03 18:25:38 |
Adam Conrad |
bug |
|
|
added subscriber Ubuntu Stable Release Updates Team |
| 2012-07-03 18:25:43 |
Adam Conrad |
bug |
|
|
added subscriber SRU Verification |
| 2012-07-03 18:26:30 |
Adam Conrad |
linux (Ubuntu Precise): status |
Fix Committed |
New |
|
| 2012-07-03 18:26:43 |
Adam Conrad |
linux (Ubuntu Precise): status |
New |
Triaged |
|
| 2012-07-03 18:29:03 |
Adam Conrad |
base-files (Ubuntu Oneiric): status |
New |
Fix Committed |
|
| 2012-07-03 18:29:10 |
Adam Conrad |
tags |
kernel-da-key kernel-key lucid precise |
kernel-da-key kernel-key lucid precise verification-needed |
|
| 2012-07-03 18:34:45 |
Steve Langasek |
description |
As widely reported, the addition of the leap second on 2012-06-30 has
caused high CPU usage and futex lockups in a lot of applications
including JVMs, Mysql as well as desktop apps like Firefox and
Thunderbird.
https://lkml.org/lkml/2012/6/30/122
http://serverfault.com/questions/403732/anyone-else-experiencing-high-rates-of-linux-server-crashes-during-a-leap-second
https://blog.mozilla.org/it/2012/06/30/mysql-and-the-leap-second-high-cpu-and-the-fix/
We've seen this ourselves on the Canonical infrastructure on both
current Lucid and Precise kernels, i.e.
ii linux-image-2.6.32-41-server 2.6.32-41.90 Linux kernel image for version 2.6.32 on x86_64
ii linux-image-3.2.0-24-generic 3.2.0-24.39 Linux kernel image for version 3.2.0 on 64 bit x86 SMP
We can also confirm the 'date -s $(date)' workaround fixes the problem
without requiring a reboot. |
[Impact]
Software that relies on fine-grained pthread timeouts will spin indefinitely and drive up system load following a leap second, when the kernel's idea of time has become desynced and sub-1s timeouts are all hit immediately. Mysql and Java are in particular reported to be affected by this. This is a transient issue, in that it will go away the first time the system is rebooted after the leap second and is expected to be fixed before the next leap second occurs; nevertheless admins have been caught off-guard by this misbehavior and in some cases may not have noticed the problem or know what to do about it, so we should help them along by resetting the kernel clock with a minimal-risk base-files update.
[Test Case]
1. Find a system that has been online, with mysqld or a java-based process running since before 2012-06-30.
2. Verify that one or more processes on the system are spinning in futex and driving up the system load.
3. Upgrade to the base-files package from -proposed.
4. Verify that the system load comes back down immediately.
[Regression potential]
No analysis has been done on the effect of resetting the date on applications that require a high-accuracy clock. While this fixes the problem with the pthreads interfaces, it may cause other problems for other software. Since the proposed fix is to reset the kernel's date to the current date, which is not atomic, there will be a slight skew of the clock backwards in time. ntp *should* fix this shortly thereafter for machines that have it enabled.
As widely reported, the addition of the leap second on 2012-06-30 has
caused high CPU usage and futex lockups in a lot of applications
including JVMs, Mysql as well as desktop apps like Firefox and
Thunderbird.
https://lkml.org/lkml/2012/6/30/122
http://serverfault.com/questions/403732/anyone-else-experiencing-high-rates-of-linux-server-crashes-during-a-leap-second
https://blog.mozilla.org/it/2012/06/30/mysql-and-the-leap-second-high-cpu-and-the-fix/
We've seen this ourselves on the Canonical infrastructure on both
current Lucid and Precise kernels, i.e.
ii linux-image-2.6.32-41-server 2.6.32-41.90 Linux kernel image for version 2.6.32 on x86_64
ii linux-image-3.2.0-24-generic 3.2.0-24.39 Linux kernel image for version 3.2.0 on 64 bit x86 SMP
We can also confirm the 'date -s $(date)' workaround fixes the problem
without requiring a reboot. |
|
| 2012-07-03 18:43:40 |
Adam Conrad |
description |
[Impact]
Software that relies on fine-grained pthread timeouts will spin indefinitely and drive up system load following a leap second, when the kernel's idea of time has become desynced and sub-1s timeouts are all hit immediately. Mysql and Java are in particular reported to be affected by this. This is a transient issue, in that it will go away the first time the system is rebooted after the leap second and is expected to be fixed before the next leap second occurs; nevertheless admins have been caught off-guard by this misbehavior and in some cases may not have noticed the problem or know what to do about it, so we should help them along by resetting the kernel clock with a minimal-risk base-files update.
[Test Case]
1. Find a system that has been online, with mysqld or a java-based process running since before 2012-06-30.
2. Verify that one or more processes on the system are spinning in futex and driving up the system load.
3. Upgrade to the base-files package from -proposed.
4. Verify that the system load comes back down immediately.
[Regression potential]
No analysis has been done on the effect of resetting the date on applications that require a high-accuracy clock. While this fixes the problem with the pthreads interfaces, it may cause other problems for other software. Since the proposed fix is to reset the kernel's date to the current date, which is not atomic, there will be a slight skew of the clock backwards in time. ntp *should* fix this shortly thereafter for machines that have it enabled.
As widely reported, the addition of the leap second on 2012-06-30 has
caused high CPU usage and futex lockups in a lot of applications
including JVMs, Mysql as well as desktop apps like Firefox and
Thunderbird.
https://lkml.org/lkml/2012/6/30/122
http://serverfault.com/questions/403732/anyone-else-experiencing-high-rates-of-linux-server-crashes-during-a-leap-second
https://blog.mozilla.org/it/2012/06/30/mysql-and-the-leap-second-high-cpu-and-the-fix/
We've seen this ourselves on the Canonical infrastructure on both
current Lucid and Precise kernels, i.e.
ii linux-image-2.6.32-41-server 2.6.32-41.90 Linux kernel image for version 2.6.32 on x86_64
ii linux-image-3.2.0-24-generic 3.2.0-24.39 Linux kernel image for version 3.2.0 on 64 bit x86 SMP
We can also confirm the 'date -s $(date)' workaround fixes the problem
without requiring a reboot. |
[Impact]
Software that relies on fine-grained pthread timeouts will spin indefinitely and drive up system load following a leap second, when the kernel's idea of time has become desynced and sub-1s timeouts are all hit immediately. Mysql and Java are in particular reported to be affected by this. This is a transient issue, in that it will go away the first time the system is rebooted after the leap second and is expected to be fixed before the next leap second occurs; nevertheless admins have been caught off-guard by this misbehavior and in some cases may not have noticed the problem or know what to do about it, so we should help them along by resetting the kernel clock with a minimal-risk base-files update.
[Test Case]
1. Find a system that has been online, with mysqld or a java-based process running since before 2012-06-30.
2. Verify that one or more processes on the system are spinning in futex and driving up the system load.
3. Upgrade to the base-files package from -proposed.
4. Verify that the system load comes back down immediately.
5. A stress-test for leap-second handling has been provided at https://lkml.org/lkml/2012/7/3/37
[Regression potential]
No analysis has been done on the effect of resetting the date on applications that require a high-accuracy clock. While this fixes the problem with the pthreads interfaces, it may cause other problems for other software. Since the proposed fix is to reset the kernel's date to the current date, which is not atomic, there will be a slight skew of the clock backwards in time. ntp *should* fix this shortly thereafter for machines that have it enabled.
As widely reported, the addition of the leap second on 2012-06-30 has
caused high CPU usage and futex lockups in a lot of applications
including JVMs, Mysql as well as desktop apps like Firefox and
Thunderbird.
https://lkml.org/lkml/2012/6/30/122
http://serverfault.com/questions/403732/anyone-else-experiencing-high-rates-of-linux-server-crashes-during-a-leap-second
https://blog.mozilla.org/it/2012/06/30/mysql-and-the-leap-second-high-cpu-and-the-fix/
We've seen this ourselves on the Canonical infrastructure on both
current Lucid and Precise kernels, i.e.
ii linux-image-2.6.32-41-server 2.6.32-41.90 Linux kernel image for version 2.6.32 on x86_64
ii linux-image-3.2.0-24-generic 3.2.0-24.39 Linux kernel image for version 3.2.0 on 64 bit x86 SMP
We can also confirm the 'date -s $(date)' workaround fixes the problem
without requiring a reboot. |
|
| 2012-07-03 18:43:56 |
Launchpad Janitor |
branch linked |
|
lp:~ubuntu-branches/ubuntu/oneiric/base-files/oneiric-proposed |
|
| 2012-07-03 18:44:06 |
Launchpad Janitor |
branch linked |
|
lp:~ubuntu-branches/ubuntu/precise/base-files/precise-proposed |
|
| 2012-07-03 18:44:57 |
Adam Conrad |
base-files (Ubuntu Natty): status |
New |
Fix Committed |
|
| 2012-07-03 18:46:00 |
Steve Langasek |
description |
[Impact]
Software that relies on fine-grained pthread timeouts will spin indefinitely and drive up system load following a leap second, when the kernel's idea of time has become desynced and sub-1s timeouts are all hit immediately. Mysql and Java are in particular reported to be affected by this. This is a transient issue, in that it will go away the first time the system is rebooted after the leap second and is expected to be fixed before the next leap second occurs; nevertheless admins have been caught off-guard by this misbehavior and in some cases may not have noticed the problem or know what to do about it, so we should help them along by resetting the kernel clock with a minimal-risk base-files update.
[Test Case]
1. Find a system that has been online, with mysqld or a java-based process running since before 2012-06-30.
2. Verify that one or more processes on the system are spinning in futex and driving up the system load.
3. Upgrade to the base-files package from -proposed.
4. Verify that the system load comes back down immediately.
5. A stress-test for leap-second handling has been provided at https://lkml.org/lkml/2012/7/3/37
[Regression potential]
No analysis has been done on the effect of resetting the date on applications that require a high-accuracy clock. While this fixes the problem with the pthreads interfaces, it may cause other problems for other software. Since the proposed fix is to reset the kernel's date to the current date, which is not atomic, there will be a slight skew of the clock backwards in time. ntp *should* fix this shortly thereafter for machines that have it enabled.
As widely reported, the addition of the leap second on 2012-06-30 has
caused high CPU usage and futex lockups in a lot of applications
including JVMs, Mysql as well as desktop apps like Firefox and
Thunderbird.
https://lkml.org/lkml/2012/6/30/122
http://serverfault.com/questions/403732/anyone-else-experiencing-high-rates-of-linux-server-crashes-during-a-leap-second
https://blog.mozilla.org/it/2012/06/30/mysql-and-the-leap-second-high-cpu-and-the-fix/
We've seen this ourselves on the Canonical infrastructure on both
current Lucid and Precise kernels, i.e.
ii linux-image-2.6.32-41-server 2.6.32-41.90 Linux kernel image for version 2.6.32 on x86_64
ii linux-image-3.2.0-24-generic 3.2.0-24.39 Linux kernel image for version 3.2.0 on 64 bit x86 SMP
We can also confirm the 'date -s $(date)' workaround fixes the problem
without requiring a reboot. |
[Impact]
Software that relies on fine-grained pthread timeouts will spin indefinitely and drive up system load following a leap second, when the kernel's idea of time has become desynced and sub-1s timeouts are all hit immediately. Mysql and Java are in particular reported to be affected by this. This is a transient issue, in that it will go away the first time the system is rebooted after the leap second and is expected to be fixed before the next leap second occurs; nevertheless admins have been caught off-guard by this misbehavior and in some cases may not have noticed the problem or know what to do about it, so we should help them along by resetting the kernel clock with a minimal-risk base-files update.
[Test Case]
1. Find a system that has been online, with mysqld or a java-based process running since before 2012-06-30.
2. Verify that one or more processes on the system are spinning in futex and driving up the system load.
3. Upgrade to the base-files package from -proposed.
4. Verify that the system load comes back down immediately.
5. A stress-test for leap-second handling has been provided at https://lkml.org/lkml/2012/7/3/37
[Regression potential]
No analysis has been done on the effect of resetting the date on applications that require a high-accuracy clock. While this fixes the problem with the pthreads interfaces, it may cause other problems for other software. Since the proposed fix is to reset the kernel's date to the current date, which is not atomic, there will be a slight skew of the clock backwards in time. ntp *should* fix this shortly thereafter for machines that have it enabled.
Also, because there's a single version check for each copy of the SRU, users whose applications are negatively affected by the running of this date command will also be negatively affected on each subsequent upgrade of the system, up to and including the quantal devel release.
As widely reported, the addition of the leap second on 2012-06-30 has
caused high CPU usage and futex lockups in a lot of applications
including JVMs, Mysql as well as desktop apps like Firefox and
Thunderbird.
https://lkml.org/lkml/2012/6/30/122
http://serverfault.com/questions/403732/anyone-else-experiencing-high-rates-of-linux-server-crashes-during-a-leap-second
https://blog.mozilla.org/it/2012/06/30/mysql-and-the-leap-second-high-cpu-and-the-fix/
We've seen this ourselves on the Canonical infrastructure on both
current Lucid and Precise kernels, i.e.
ii linux-image-2.6.32-41-server 2.6.32-41.90 Linux kernel image for version 2.6.32 on x86_64
ii linux-image-3.2.0-24-generic 3.2.0-24.39 Linux kernel image for version 3.2.0 on 64 bit x86 SMP
We can also confirm the 'date -s $(date)' workaround fixes the problem
without requiring a reboot. |
|
| 2012-07-03 18:54:46 |
Adam Conrad |
base-files (Ubuntu Lucid): status |
New |
Fix Committed |
|
| 2012-07-03 19:04:50 |
Launchpad Janitor |
branch linked |
|
lp:~ubuntu-branches/ubuntu/natty/base-files/natty-proposed |
|
| 2012-07-03 19:17:26 |
Launchpad Janitor |
branch linked |
|
lp:ubuntu/lucid-proposed/base-files |
|
| 2012-07-05 19:30:32 |
Alex Gorban |
bug |
|
|
added subscriber Alex Gorban |
| 2012-07-06 08:49:26 |
Itaru Kitayama |
bug |
|
|
added subscriber Itaru Kitayama |
| 2012-07-06 11:02:31 |
Dave Russell |
bug |
|
|
added subscriber Dave Russell |
| 2012-07-06 22:58:24 |
Nathan Stratton Treadway |
bug |
|
|
added subscriber Nathan Stratton Treadway |
| 2012-07-07 19:45:14 |
Nathan Stratton Treadway |
bug watch added |
|
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=679882 |
|
| 2012-07-09 20:47:08 |
Steve Langasek |
base-files (Ubuntu Lucid): status |
Fix Committed |
Won't Fix |
|
| 2012-07-09 20:47:32 |
Steve Langasek |
base-files (Ubuntu Natty): status |
Fix Committed |
Won't Fix |
|
| 2012-07-09 20:48:17 |
Steve Langasek |
base-files (Ubuntu Oneiric): status |
Fix Committed |
Won't Fix |
|
| 2012-07-09 20:48:44 |
Steve Langasek |
base-files (Ubuntu Precise): status |
Fix Committed |
Won't Fix |
|
| 2012-07-09 20:49:13 |
Steve Langasek |
base-files (Ubuntu Quantal): status |
Fix Released |
Won't Fix |
|
| 2012-07-12 04:20:50 |
Nathan Stratton Treadway |
attachment added |
|
Python script to check for post-leap-second sub-second timeouts issue https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1020285/+attachment/3220508/+files/post_leapsecond_nanosleep_check.py |
|
| 2012-07-12 04:56:57 |
Nathan Stratton Treadway |
attachment removed |
Python script to check for post-leap-second sub-second timeouts issue https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1020285/+attachment/3220508/+files/post_leapsecond_nanosleep_check.py |
|
|
| 2012-07-12 05:01:01 |
Nathan Stratton Treadway |
attachment added |
|
Python script to check for post-leap-second sub-second timeouts issue https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1020285/+attachment/3220568/+files/post_leapsecond_nanosleep_check.py |
|
| 2012-07-12 22:09:50 |
Nathan Stratton Treadway |
bug watch added |
|
https://bugzilla.redhat.com/show_bug.cgi?id=836803 |
|
| 2012-07-24 15:24:22 |
Tim Gardner |
linux (Ubuntu Lucid): status |
Triaged |
Fix Committed |
|
| 2012-07-27 20:27:23 |
Launchpad Janitor |
branch linked |
|
lp:ubuntu/lucid-proposed/linux-ec2 |
|
| 2012-07-30 09:46:18 |
Luis Henriques |
tags |
kernel-da-key kernel-key lucid precise verification-needed |
kernel-da-key kernel-key lucid precise verification-needed verification-needed-lucid |
|
| 2012-07-30 10:31:07 |
Luis Henriques |
tags |
kernel-da-key kernel-key lucid precise verification-needed verification-needed-lucid |
kernel-da-key kernel-key lucid precise verification-done-lucid verification-needed |
|
| 2012-08-01 17:45:09 |
Abel Lopez |
bug |
|
|
added subscriber Abel Lopez |
| 2012-08-10 00:24:35 |
Adam Conrad |
removed subscriber Ubuntu Stable Release Updates Team |
|
|
|
| 2012-08-10 00:25:46 |
Launchpad Janitor |
linux (Ubuntu Lucid): status |
Fix Committed |
Fix Released |
|
| 2012-08-10 00:25:46 |
Launchpad Janitor |
cve linked |
|
2012-2136 |
|
| 2012-08-10 00:25:46 |
Launchpad Janitor |
cve linked |
|
2012-2390 |
|
| 2012-08-28 18:50:13 |
Joseph Salisbury |
tags |
kernel-da-key kernel-key lucid precise verification-done-lucid verification-needed |
kernel-da-key lucid precise verification-done-lucid verification-needed |
|
| 2012-08-29 20:28:52 |
Herton R. Krzesinski |
linux (Ubuntu Oneiric): status |
Triaged |
Fix Released |
|
| 2012-08-29 20:29:07 |
Herton R. Krzesinski |
linux (Ubuntu Precise): status |
Triaged |
Fix Released |
|
| 2012-08-29 20:36:55 |
Herton R. Krzesinski |
linux (Ubuntu Quantal): status |
In Progress |
Fix Released |
|
| 2012-09-22 10:42:45 |
jan |
bug |
|
|
added subscriber jan |
| 2013-08-18 17:19:42 |
Julian Wiedmann |
linux (Ubuntu Natty): status |
Triaged |
Invalid |
|
