[Bug 675185] Re: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU
Percona now uses JIRA for bug reports so this bug report is migrated to: https://jira.percona.com/browse/PS-1164 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/675185 Title: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU To manage notifications about this bug go to: https://bugs.launchpad.net/maria/+bug/675185/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 675185] Re: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU
** Changed in: dash (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/675185 Title: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU To manage notifications about this bug go to: https://bugs.launchpad.net/maria/+bug/675185/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 675185] Re: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU
Hello, we apologize for the delayed response, but as Ubuntu has moved on from upstart to systemd, it will not affect newer releases in the same way so we will close this one out ** Changed in: mysql-5.1 (Ubuntu) Status: Confirmed => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/675185 Title: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU To manage notifications about this bug go to: https://bugs.launchpad.net/maria/+bug/675185/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 675185] Re: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU
** Description changed: Symptoms are: After mysql server upgrades + restarts the old mysqld_safe keeps running and consumes 100% cpu, strace shows: wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child ... wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child ... wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child ... For more info see the dupes, particularily bug 105457. Does not happen always, for reliable test case see below. This is a bug (race condition) in dash, partly fixed by http://git.kernel.org/?p=utils/dash/dash.git;a=commit;h=3800d4934391b144fd261a7957aea72ced7d47ea . This fixes the test case and mysqld_safe, but introduces another regression: http://eeek.borgchat.net/lists/dash/msg00268.html (patch for that in the thread) TEST CASE: Script in the commit message (link above). Allows to reproduce this always, even on Karmic still. - SRU JUSTIFICATION: Obviously safe patch. - - PATCH: Attached, run mysqld_safe in bash instead of dash. - - REGRESSION POTENTIAL: Minimal. 1) Bash is a superset of dash. 2) Before - dash became the default sh, bash was used, we just revert that change. + (Proposed fix of using #!/bin/bash instead of #!/bin/sh is not as + straigtforward as expected. bash called as sh goes into sh compatibility + mode, called as bash it may behave subtle differently) NOTES: mysqld_safe was replaced by an upstart job in Lucid. But Hardy has support for 3 more years, justifiying a fix. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to mysql-5.1 in Ubuntu. https://bugs.launchpad.net/bugs/675185 Title: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU To manage notifications about this bug go to: https://bugs.launchpad.net/maria/+bug/675185/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 675185] Re: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU
** Description changed: Symptoms are: After mysql server upgrades + restarts the old mysqld_safe keeps running and consumes 100% cpu, strace shows: wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child ... wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child ... wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child ... For more info see the dupes, particularily bug 105457. Does not happen always, for reliable test case see below. This is a bug (race condition) in dash, partly fixed by http://git.kernel.org/?p=utils/dash/dash.git;a=commit;h=3800d4934391b144fd261a7957aea72ced7d47ea . This fixes the test case and mysqld_safe, but introduces another regression: http://eeek.borgchat.net/lists/dash/msg00268.html (patch for that in the thread) TEST CASE: Script in the commit message (link above). Allows to reproduce this always, even on Karmic still. - SRU JUSTIFICATION: Obviously safe patch. - - PATCH: Attached, run mysqld_safe in bash instead of dash. - - REGRESSION POTENTIAL: Minimal. 1) Bash is a superset of dash. 2) Before - dash became the default sh, bash was used, we just revert that change. + (Proposed fix of using #!/bin/bash instead of #!/bin/sh is not as + straigtforward as expected. bash called as sh goes into sh compatibility + mode, called as bash it may behave subtle differently) NOTES: mysqld_safe was replaced by an upstart job in Lucid. But Hardy has support for 3 more years, justifiying a fix. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/675185 Title: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU To manage notifications about this bug go to: https://bugs.launchpad.net/maria/+bug/675185/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 675185] Re: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU
I tested the testcase in the commit on Precise and there seem to no issue there (probably fixed there). Also, it is not the right approach to change #!/bin/sh to #!/bin/bash since former invokes POSIX compatibility mode and if dash has problems on any platform, then that should be fixed rather than changing it in mysqld_safe or #!/bin/sh needs to pointed elsewhere (or with update-alternatives). Regarding the init scripts, I see that Percona Server is not packaged with upstart script (hence vulnerable to this if on a platform with a buggy dash) as mysql-server-55 does. I will open a separate issue to add that. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to mysql-5.1 in Ubuntu. https://bugs.launchpad.net/bugs/675185 Title: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU To manage notifications about this bug go to: https://bugs.launchpad.net/maria/+bug/675185/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 675185] Re: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU
lp:1053183 is the issue for providing upstart scripts with percona- server. ** Changed in: percona-server/5.5 Status: New = Invalid ** Changed in: percona-server/5.1 Status: New = Invalid -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to mysql-5.1 in Ubuntu. https://bugs.launchpad.net/bugs/675185 Title: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU To manage notifications about this bug go to: https://bugs.launchpad.net/maria/+bug/675185/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 675185] Re: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU
I tested the testcase in the commit on Precise and there seem to no issue there (probably fixed there). Also, it is not the right approach to change #!/bin/sh to #!/bin/bash since former invokes POSIX compatibility mode and if dash has problems on any platform, then that should be fixed rather than changing it in mysqld_safe or #!/bin/sh needs to pointed elsewhere (or with update-alternatives). Regarding the init scripts, I see that Percona Server is not packaged with upstart script (hence vulnerable to this if on a platform with a buggy dash) as mysql-server-55 does. I will open a separate issue to add that. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/675185 Title: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU To manage notifications about this bug go to: https://bugs.launchpad.net/maria/+bug/675185/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 675185] Re: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU
lp:1053183 is the issue for providing upstart scripts with percona- server. ** Changed in: percona-server/5.5 Status: New = Invalid ** Changed in: percona-server/5.1 Status: New = Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/675185 Title: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU To manage notifications about this bug go to: https://bugs.launchpad.net/maria/+bug/675185/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 675185] Re: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU
** Also affects: percona-server/5.1 Importance: Undecided Status: New ** Also affects: percona-server/5.5 Importance: Medium Status: New ** Changed in: percona-server/5.1 Assignee: (unassigned) = Ignacio Nin (ignacio-nin) ** Changed in: percona-server/5.5 Assignee: (unassigned) = Ignacio Nin (ignacio-nin) -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to mysql-5.1 in Ubuntu. https://bugs.launchpad.net/bugs/675185 Title: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU To manage notifications about this bug go to: https://bugs.launchpad.net/maria/+bug/675185/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 675185] Re: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU
** Also affects: percona-server/5.1 Importance: Undecided Status: New ** Also affects: percona-server/5.5 Importance: Medium Status: New ** Changed in: percona-server/5.1 Assignee: (unassigned) = Ignacio Nin (ignacio-nin) ** Changed in: percona-server/5.5 Assignee: (unassigned) = Ignacio Nin (ignacio-nin) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/675185 Title: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU To manage notifications about this bug go to: https://bugs.launchpad.net/maria/+bug/675185/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 675185] Re: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU
** Tags added: testcase -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to mysql-5.1 in Ubuntu. https://bugs.launchpad.net/bugs/675185 Title: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU To manage notifications about this bug go to: https://bugs.launchpad.net/maria/+bug/675185/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 675185] Re: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU
** Tags added: testcase -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/675185 Title: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU To manage notifications about this bug go to: https://bugs.launchpad.net/maria/+bug/675185/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 675185] Re: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU
** Changed in: percona-server Importance: Undecided = Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/675185 Title: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU To manage notifications about this bug go to: https://bugs.launchpad.net/maria/+bug/675185/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 675185] Re: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU
** Also affects: percona-server Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to mysql-5.1 in Ubuntu. https://bugs.launchpad.net/bugs/675185 Title: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 675185] Re: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU
** Also affects: percona-server Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/675185 Title: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 675185] Re: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU
** Package changed: mysql-dfsg-5.0 (Ubuntu) = mysql-5.1 (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to mysql-5.1 in Ubuntu. https://bugs.launchpad.net/bugs/675185 Title: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 675185] Re: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU
** Package changed: mysql-dfsg-5.0 (Ubuntu) = mysql-5.1 (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/675185 Title: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 675185] Re: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU
Fixed in MariaDB 5.2.4 and 5.1.53 ** Changed in: maria Status: Fix Committed = Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/675185 Title: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 675185] Re: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU
** Changed in: maria Milestone: None = 5.1 -- [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU https://bugs.launchpad.net/bugs/675185 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to mysql-dfsg-5.0 in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 675185] Re: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU
** Changed in: maria Milestone: None = 5.1 -- [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU https://bugs.launchpad.net/bugs/675185 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 675185] Re: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU
Please get this fixed in natty first (or at least alongside). The patch looks okay as a minimal workaround, so please get it uploaded. -- [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU https://bugs.launchpad.net/bugs/675185 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to mysql-dfsg-5.0 in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 675185] Re: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU
Thing is, mysqld_safe isn't used anymore since Lucid as upstart has taken over (the file is still there though). ** Description changed: Symptoms are: After mysql server upgrades + restarts the old mysqld_safe keeps running and consumes 100% cpu, strace shows: wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child ... wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child ... wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child ... For more info see the dupes, particularily bug 105457. Does not happen always, for reliable test case see below. - This is a bug (race condition) in dash, fixed by + This is a bug (race condition) in dash, partly fixed by http://git.kernel.org/?p=utils/dash/dash.git;a=commit;h=3800d4934391b144fd261a7957aea72ced7d47ea - . + . This fixes the test case and mysqld_safe, but introduces another + regression: http://eeek.borgchat.net/lists/dash/msg00268.html (patch for + that in the thread) TEST CASE: Script in the commit message (link above). Allows to reproduce this always, even on Karmic still. SRU JUSTIFICATION: Obviously safe patch. PATCH: Attached, run mysqld_safe in bash instead of dash. REGRESSION POTENTIAL: Minimal. 1) Bash is a superset of dash. 2) Before dash became the default sh, bash was used, we just revert that change. NOTES: mysqld_safe will be replaced by an upstart job. But Hardy has support for 3 more years, justifiying a fix. ** Description changed: Symptoms are: After mysql server upgrades + restarts the old mysqld_safe keeps running and consumes 100% cpu, strace shows: wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child ... wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child ... wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child ... For more info see the dupes, particularily bug 105457. Does not happen always, for reliable test case see below. This is a bug (race condition) in dash, partly fixed by http://git.kernel.org/?p=utils/dash/dash.git;a=commit;h=3800d4934391b144fd261a7957aea72ced7d47ea . This fixes the test case and mysqld_safe, but introduces another regression: http://eeek.borgchat.net/lists/dash/msg00268.html (patch for that in the thread) TEST CASE: Script in the commit message (link above). Allows to reproduce this always, even on Karmic still. SRU JUSTIFICATION: Obviously safe patch. PATCH: Attached, run mysqld_safe in bash instead of dash. REGRESSION POTENTIAL: Minimal. 1) Bash is a superset of dash. 2) Before dash became the default sh, bash was used, we just revert that change. - NOTES: mysqld_safe will be replaced by an upstart job. But Hardy has - support for 3 more years, justifiying a fix. + NOTES: mysqld_safe was replaced by an upstart job in Lucid. But Hardy + has support for 3 more years, justifiying a fix. -- [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU https://bugs.launchpad.net/bugs/675185 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to mysql-dfsg-5.0 in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 675185] Re: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU
I fixed this for mariadb by adding a patch to the .deb packaging that puts #!/bin/bash in the header of mysqld_safe. Fix will be available from 5.1.52 and 5.2.4. ** Changed in: maria Status: In Progress = Fix Committed -- [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU https://bugs.launchpad.net/bugs/675185 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to mysql-dfsg-5.0 in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 675185] Re: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU
Please get this fixed in natty first (or at least alongside). The patch looks okay as a minimal workaround, so please get it uploaded. -- [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU https://bugs.launchpad.net/bugs/675185 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 675185] Re: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU
Thing is, mysqld_safe isn't used anymore since Lucid as upstart has taken over (the file is still there though). ** Description changed: Symptoms are: After mysql server upgrades + restarts the old mysqld_safe keeps running and consumes 100% cpu, strace shows: wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child ... wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child ... wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child ... For more info see the dupes, particularily bug 105457. Does not happen always, for reliable test case see below. - This is a bug (race condition) in dash, fixed by + This is a bug (race condition) in dash, partly fixed by http://git.kernel.org/?p=utils/dash/dash.git;a=commit;h=3800d4934391b144fd261a7957aea72ced7d47ea - . + . This fixes the test case and mysqld_safe, but introduces another + regression: http://eeek.borgchat.net/lists/dash/msg00268.html (patch for + that in the thread) TEST CASE: Script in the commit message (link above). Allows to reproduce this always, even on Karmic still. SRU JUSTIFICATION: Obviously safe patch. PATCH: Attached, run mysqld_safe in bash instead of dash. REGRESSION POTENTIAL: Minimal. 1) Bash is a superset of dash. 2) Before dash became the default sh, bash was used, we just revert that change. NOTES: mysqld_safe will be replaced by an upstart job. But Hardy has support for 3 more years, justifiying a fix. ** Description changed: Symptoms are: After mysql server upgrades + restarts the old mysqld_safe keeps running and consumes 100% cpu, strace shows: wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child ... wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child ... wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child ... For more info see the dupes, particularily bug 105457. Does not happen always, for reliable test case see below. This is a bug (race condition) in dash, partly fixed by http://git.kernel.org/?p=utils/dash/dash.git;a=commit;h=3800d4934391b144fd261a7957aea72ced7d47ea . This fixes the test case and mysqld_safe, but introduces another regression: http://eeek.borgchat.net/lists/dash/msg00268.html (patch for that in the thread) TEST CASE: Script in the commit message (link above). Allows to reproduce this always, even on Karmic still. SRU JUSTIFICATION: Obviously safe patch. PATCH: Attached, run mysqld_safe in bash instead of dash. REGRESSION POTENTIAL: Minimal. 1) Bash is a superset of dash. 2) Before dash became the default sh, bash was used, we just revert that change. - NOTES: mysqld_safe will be replaced by an upstart job. But Hardy has - support for 3 more years, justifiying a fix. + NOTES: mysqld_safe was replaced by an upstart job in Lucid. But Hardy + has support for 3 more years, justifiying a fix. -- [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU https://bugs.launchpad.net/bugs/675185 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 675185] Re: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU
I fixed this for mariadb by adding a patch to the .deb packaging that puts #!/bin/bash in the header of mysqld_safe. Fix will be available from 5.1.52 and 5.2.4. ** Changed in: maria Status: In Progress = Fix Committed -- [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU https://bugs.launchpad.net/bugs/675185 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 675185] Re: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU
** Changed in: maria Status: New = In Progress ** Changed in: maria Assignee: (unassigned) = Kristian Nielsen (knielsen) ** Changed in: maria Importance: Undecided = Medium -- [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU https://bugs.launchpad.net/bugs/675185 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to mysql-dfsg-5.0 in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 675185] Re: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU
** Changed in: maria Status: New = In Progress ** Changed in: maria Assignee: (unassigned) = Kristian Nielsen (knielsen) ** Changed in: maria Importance: Undecided = Medium -- [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU https://bugs.launchpad.net/bugs/675185 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 675185] Re: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU
Be sure to verify that the script works with bash's non-POSIX mode as well. A not so well known feature of bash is that it enters POSIX mode when called as sh. This causes various subtle differences. Therefore, a #!/bin/sh script with /bin/sh - bash might behave differently from a #!/bin/bash script. -- [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU https://bugs.launchpad.net/bugs/675185 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to mysql-dfsg-5.0 in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 675185] Re: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU
Be sure to verify that the script works with bash's non-POSIX mode as well. A not so well known feature of bash is that it enters POSIX mode when called as sh. This causes various subtle differences. Therefore, a #!/bin/sh script with /bin/sh - bash might behave differently from a #!/bin/bash script. -- [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU https://bugs.launchpad.net/bugs/675185 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 675185] Re: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU
Thanks for the patch, can you follow the process outlined by: https://wiki.ubuntu.com/StableReleaseUpdates thanks chuck ** Changed in: mysql-dfsg-5.0 (Ubuntu) Status: New = Confirmed -- [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU https://bugs.launchpad.net/bugs/675185 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to mysql-dfsg-5.0 in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 675185] Re: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU
Thanks for the patch, can you follow the process outlined by: https://wiki.ubuntu.com/StableReleaseUpdates thanks chuck ** Changed in: mysql-dfsg-5.0 (Ubuntu) Status: New = Confirmed -- [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU https://bugs.launchpad.net/bugs/675185 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 675185] Re: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU
** Patch added: fix.diff https://bugs.launchpad.net/bugs/675185/+attachment/1733135/+files/fix.diff ** Description changed: Symptoms are: After mysql server upgrades + restarts the old mysqld_safe keeps running and consumes 100% cpu, strace shows: - 14:18:18.789847 wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child processes) - 14:18:18.789920 wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child processes) - 14:18:18.789992 wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child processes) + wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child processes) + wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child processes) + wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child processes) For more info see the dupes, particularily bug 105457. Does not happen always, for reliable test case see below. This is a bug (race condition) in dash, fixed by http://git.kernel.org/?p=utils/dash/dash.git;a=commit;h=3800d4934391b144fd261a7957aea72ced7d47ea . TEST CASE: Script in the commit message (link above). Allows to reproduce this always, even on Karmic still. SRU JUSTIFICATION: Obviously safe patch. PATCH: Attached, run mysqld_safe in bash instead of dash. REGRESSION POTENTIAL: Minimal. 1) Bash is a superset of dash. 2) Before dash became the default sh, bash was used, we just revert that change. NOTES: mysqld_safe will be replaced by an upstart job. But Hardy has support for 3 more years, justifiying a fix. ** Description changed: Symptoms are: After mysql server upgrades + restarts the old mysqld_safe keeps running and consumes 100% cpu, strace shows: - wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child processes) - wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child processes) - wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child processes) + wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child ... + wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child ... + wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child ... For more info see the dupes, particularily bug 105457. Does not happen always, for reliable test case see below. This is a bug (race condition) in dash, fixed by http://git.kernel.org/?p=utils/dash/dash.git;a=commit;h=3800d4934391b144fd261a7957aea72ced7d47ea . TEST CASE: Script in the commit message (link above). Allows to reproduce this always, even on Karmic still. SRU JUSTIFICATION: Obviously safe patch. PATCH: Attached, run mysqld_safe in bash instead of dash. REGRESSION POTENTIAL: Minimal. 1) Bash is a superset of dash. 2) Before dash became the default sh, bash was used, we just revert that change. NOTES: mysqld_safe will be replaced by an upstart job. But Hardy has support for 3 more years, justifiying a fix. ** Also affects: maria Importance: Undecided Status: New -- [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU https://bugs.launchpad.net/bugs/675185 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to mysql-dfsg-5.0 in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 675185] Re: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU
** Also affects: dash (Ubuntu) Importance: Undecided Status: New -- [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU https://bugs.launchpad.net/bugs/675185 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to mysql-dfsg-5.0 in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 675185] Re: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU
** Tags added: patch -- [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU https://bugs.launchpad.net/bugs/675185 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to mysql-dfsg-5.0 in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 675185] Re: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU
** Patch added: fix.diff https://bugs.launchpad.net/bugs/675185/+attachment/1733135/+files/fix.diff ** Description changed: Symptoms are: After mysql server upgrades + restarts the old mysqld_safe keeps running and consumes 100% cpu, strace shows: - 14:18:18.789847 wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child processes) - 14:18:18.789920 wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child processes) - 14:18:18.789992 wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child processes) + wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child processes) + wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child processes) + wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child processes) For more info see the dupes, particularily bug 105457. Does not happen always, for reliable test case see below. This is a bug (race condition) in dash, fixed by http://git.kernel.org/?p=utils/dash/dash.git;a=commit;h=3800d4934391b144fd261a7957aea72ced7d47ea . TEST CASE: Script in the commit message (link above). Allows to reproduce this always, even on Karmic still. SRU JUSTIFICATION: Obviously safe patch. PATCH: Attached, run mysqld_safe in bash instead of dash. REGRESSION POTENTIAL: Minimal. 1) Bash is a superset of dash. 2) Before dash became the default sh, bash was used, we just revert that change. NOTES: mysqld_safe will be replaced by an upstart job. But Hardy has support for 3 more years, justifiying a fix. ** Description changed: Symptoms are: After mysql server upgrades + restarts the old mysqld_safe keeps running and consumes 100% cpu, strace shows: - wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child processes) - wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child processes) - wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child processes) + wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child ... + wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child ... + wait4(4294967295, 0x7fffb3b3d59c, 0, NULL) = -1 ECHILD (No child ... For more info see the dupes, particularily bug 105457. Does not happen always, for reliable test case see below. This is a bug (race condition) in dash, fixed by http://git.kernel.org/?p=utils/dash/dash.git;a=commit;h=3800d4934391b144fd261a7957aea72ced7d47ea . TEST CASE: Script in the commit message (link above). Allows to reproduce this always, even on Karmic still. SRU JUSTIFICATION: Obviously safe patch. PATCH: Attached, run mysqld_safe in bash instead of dash. REGRESSION POTENTIAL: Minimal. 1) Bash is a superset of dash. 2) Before dash became the default sh, bash was used, we just revert that change. NOTES: mysqld_safe will be replaced by an upstart job. But Hardy has support for 3 more years, justifiying a fix. ** Also affects: maria Importance: Undecided Status: New -- [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU https://bugs.launchpad.net/bugs/675185 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 675185] Re: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU
** Also affects: dash (Ubuntu) Importance: Undecided Status: New -- [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU https://bugs.launchpad.net/bugs/675185 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 675185] Re: [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU
** Tags added: patch -- [Hardy SRU] dash bug causes mysqld_safe to spin at 100% CPU https://bugs.launchpad.net/bugs/675185 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
