Re: Git crash in Ubuntu 12.04
Hi After some struggle I finally got apport work and got some information. Please check whether it will be of any help. And you guys are right, I have started to get the same crash again right now after upgrading to latest git in Ubuntu. Yes. Please do. The reason is a backtrace without symbols gives very little information (at least for people who do not use Ubuntu). GNU gdb (Ubuntu/Linaro 7.4-2012.04-0ubuntu2.1) 7.4-2012.04 Copyright (C) 2012 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later http://gnu.org/licenses/gpl.html This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type show copying and show warranty for details. This GDB was configured as x86_64-linux-gnu. For bug reporting instructions, please see: http://bugs.launchpad.net/gdb-linaro/. Reading symbols from /tmp/tmp6_sJPS/usr/lib/git-core/git...(no debugging symbols found)...done. [New LWP 31469] [New LWP 31468] [New LWP 31466] [New LWP 31464] [New LWP 31467] warning: Can't read pathname for load map: Input/output error. [Thread debugging using libthread_db enabled] Using host libthread_db library /lib/x86_64-linux-gnu/libthread_db.so.1. warning: the debug information found in /tmp/tmp6_sJPS/usr/lib/debug//lib/x86_64-linux-gnu/ld-2.15.so does not match /tmp/tmp6_sJPS/lib64/ld-linux-x86-64.so.2 (CRC mismatch). Core was generated by `git pack-objects --revs --all --stdout --delta-base-offset'. Program terminated with signal 11, Segmentation fault. #0 0x004820f0 in ?? () (gdb) bt #0 0x004820f0 in ?? () #1 0x0044b3aa in ?? () #2 0x0044b641 in ?? () #3 0x7f077973de9a in start_thread (arg=0x7f0747fff700) at pthread_create.c:308 #4 0x7f077946acbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:104 #5 0x in ?? () (gdb) ./Siva. -- To unsubscribe from this list: send the line unsubscribe git in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Git crash in Ubuntu 12.04
On Thu, Apr 18, 2013 at 9:32 PM, Sivaram Kannan siva.de...@gmail.com wrote: Hi, Probably not because there are no debugging symbols. Not sure how ubuntu packages these symbols.. Would recompiling the source packages and debugging would give different results? Yes. Please do. The reason is a backtrace without symbols gives very little information (at least for people who do not use Ubuntu). -- Duy -- To unsubscribe from this list: send the line unsubscribe git in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Git crash in Ubuntu 12.04
Hi, Probably not because there are no debugging symbols. Not sure how ubuntu packages these symbols.. Would recompiling the source packages and debugging would give different results? Any chance you could publish the repository that causes the crash? -- Duy I don't think I can publish the repo online. But I am willing to try any steps on the repo to get more info. Most likely I would restore the latest repo to the stanby server I tested which works with any crash. Let me know what I can do to get more information. ./Siva. -- To unsubscribe from this list: send the line unsubscribe git in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Git crash in Ubuntu 12.04
Hi, $ ulimit -c unlimited Have set the git user's crash limit to 1GB in /etc/security/limits.conf and still getting the same error when issuing gdb to the crash file. Yep, suppsedly in Ubuntu it's not that easy to just get a plain old coredump file -- see below. Got an proper dump from git this time. See whether it helps. I have setup another machine with Ubuntu 12.04 and updated only git and ported the repo there, after 200 clones no crash so far. Mostly will be moving latest repo to that server to solve this issue. gitadmin@gitserver:/var/crash/gitcash$ gdb git CoreDump GNU gdb (Ubuntu/Linaro 7.4-2012.04-0ubuntu2.1) 7.4-2012.04 Copyright (C) 2012 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later http://gnu.org/licenses/gpl.html This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type show copying and show warranty for details. This GDB was configured as x86_64-linux-gnu. For bug reporting instructions, please see: http://bugs.launchpad.net/gdb-linaro/... Reading symbols from /usr/bin/git...(no debugging symbols found)...done. [New LWP 12823] warning: Can't read pathname for load map: Input/output error. [Thread debugging using libthread_db enabled] Using host libthread_db library /lib/x86_64-linux-gnu/libthread_db.so.1. Core was generated by `git pack-objects --revs --all --stdout --progress --delta-base-offset'. Program terminated with signal 11, Segmentation fault. #0 0x0044bb77 in ?? () (gdb) bt #0 0x0044bb77 in ?? () #1 0x0044cb54 in ?? () #2 0x0044d4f1 in ?? () #3 0x00405634 in ?? () #4 0x00404a30 in ?? () #5 0x7fe2a149876d in __libc_start_main (main=0x404980, argc=7, ubp_av=0x7fffad58fb28, init=optimized out, fini=optimized out, rtld_fini=optimized out, stack_end=0x7fffad58fb18) at libc-start.c:226 #6 0x00404e65 in ?? () #7 0x7fffad58fb18 in ?? () #8 0x001c in ?? () #9 0x0007 in ?? () #10 0x7fffad591c95 in ?? () #11 0x7fffad591c99 in ?? () #12 0x7fffad591ca6 in ?? () #13 0x7fffad591cad in ?? () #14 0x7fffad591cb3 in ?? () #15 0x7fffad591cbc in ?? () #16 0x7fffad591cc7 in ?? () #17 0x in ?? () Thanks, ./Siva. -- To unsubscribe from this list: send the line unsubscribe git in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Git crash in Ubuntu 12.04
On Wed, Apr 17, 2013 at 4:28 PM, Sivaram Kannan siva.de...@gmail.com wrote: Got an proper dump from git this time. See whether it helps. Probably not because there are no debugging symbols. Not sure how ubuntu packages these symbols.. I have setup another machine with Ubuntu 12.04 and updated only git and ported the repo there, after 200 clones no crash so far. Any chance you could publish the repository that causes the crash? -- Duy -- To unsubscribe from this list: send the line unsubscribe git in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Git crash in Ubuntu 12.04
Hi, ^^^ Try to issue the $ ulimit -c unlimited Have set the git user's crash limit to 1GB in /etc/security/limits.conf and still getting the same error when issuing gdb to the crash file. command in your shell before attempting the cloning -- this should remove the upper limit on the core file size. And try look for the core file in the current directory after the crash occurs. I'm not sure Ubuntu's crash interceptor won't kick in, but just in case... You mean, /usr/bin/git? crash file for git is getting created each time it crashes in /var/crash. Can you please tell me what else I could try? Would upgrading to the 1.8.2.1 - latest in Ubuntu PPA would help? ./Siva. -- To unsubscribe from this list: send the line unsubscribe git in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Git crash in Ubuntu 12.04
On Fri, 12 Apr 2013 18:58:24 +0530 Sivaram Kannan siva.de...@gmail.com wrote: ^^^ Try to issue the $ ulimit -c unlimited Have set the git user's crash limit to 1GB in /etc/security/limits.conf and still getting the same error when issuing gdb to the crash file. Yep, suppsedly in Ubuntu it's not that easy to just get a plain old coredump file -- see below. command in your shell before attempting the cloning -- this should remove the upper limit on the core file size. And try look for the core file in the current directory after the crash occurs. I'm not sure Ubuntu's crash interceptor won't kick in, but just in case... You mean, /usr/bin/git? crash file for git is getting created each time it crashes in /var/crash. Can you please tell me what else I could try? Googling for ubuntu+disable+crash turns up that your Git crashes are handled by a system-wide tool called apport [1]. Considering this, I would try to explore two routes: * [1] Tells that apport has a special tool, apport-retrace, which is said to be able to download available matching debug packages, if any, and generate the stack traces. Basically this would do what Thomas advised you to attempt to do using GDB. * Try to disable apprort permanently and then crash Git normally, so that apport does not interfere with the crash and the kernel is able to generate a regular core file in your current directory. Be sure to verify the core-file-size limit has a sensibly large value in your shell before attempting to do that. Would upgrading to the 1.8.2.1 - latest in Ubuntu PPA would help? Yes, this is a viable way to try solving the problem. *But* there's a downside: the crash you're experiencing might affect later Git versions as well as yours. And if you just throw your hands there, the bug will continue to be unfixed. Hence I urge you to be a good F/OSS user and help the Git devs investigate the case. 1. https://wiki.ubuntu.com/Apport -- To unsubscribe from this list: send the line unsubscribe git in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Git crash in Ubuntu 12.04
Hi, Thanks for the reply. Can you tell us what command you ran, and also try to get a readable backtrace from your installation? The crash is happening only when the users are trying to do a clone. I was monitoring from the htop when triggering a clone operation, all the cores of the processor hits 100% for some time before dropping. The servers hw config is Intel Quad core processor with 8GB Ram. It seems that the paste would have contained a core dump (you snipped it9, but it would be pretty useless without the corresponding binary anyway. Once you have the coredump in hand (as a file) you can use gdb $(which git) the_coredump_file and then in the GDB prompt, enter 'backtrace' and paste its output, to give us an idea what is going on. Output of coredump gdb: gitadmin@gitserver:/var/crash/dump$ gdb git CoreDump GNU gdb (Ubuntu/Linaro 7.4-2012.04-0ubuntu2.1) 7.4-2012.04 Copyright (C) 2012 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later http://gnu.org/licenses/gpl.html This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type show copying and show warranty for details. This GDB was configured as x86_64-linux-gnu. For bug reporting instructions, please see: http://bugs.launchpad.net/gdb-linaro/... Reading symbols from /usr/bin/git...(no debugging symbols found)...done. BFD: Warning: /var/crash/dump/CoreDump is truncated: expected core file size = 600195072, found: 1114112. [New LWP 17584] [New LWP 17587] [New LWP 17586] [New LWP 17440] [New LWP 17585] Cannot access memory at address 0x7f193623e2a8 Cannot access memory at address 0x7f193623e2a0 (gdb) bt #0 0x004820f0 in ?? () Cannot access memory at address 0x7f191073bda8 (gdb) = The following I am copy pasting from the file called ProcMaps, which gets created after I run apport-unpack crashfile. 0040-00541000 r-xp fc:00 2098029 /usr/lib/git-core/git 00741000-00742000 r--p 00141000 fc:00 2098029 /usr/lib/git-core/git 00742000-00749000 rw-p 00142000 fc:00 2098029 /usr/lib/git-core/git 00749000-00799000 rw-p 00:00 0 01c13000-01ecf000 rw-p 00:00 0 [heap] 7f1ad57c-7f1ae000 rw-p 00:00 0 7f1ae000-7f1ae0ed4000 rw-p 00:00 0 7f1ae0ed4000-7f1ae400 ---p 00:00 0 7f1ae400-7f1ae665f000 rw-p 00:00 0 7f1ae665f000-7f1ae800 ---p 00:00 0 7f1ae800-7f1aea91a000 rw-p 00:00 0 7f1aea91a000-7f1aec00 ---p 00:00 0 7f1aec00-7f1aefede000 rw-p 00:00 0 7f1aefede000-7f1af000 ---p 00:00 0 7f1af000-7f1af3b95000 rw-p 00:00 0 7f1af3b95000-7f1af400 ---p 00:00 0 7f1af414b000-7f1af5eaf000 rw-p 00:00 0 7f1af6c4d000-7f1af6ffe000 rw-p 00:00 0 7f1af6ffe000-7f1af6fff000 ---p 00:00 0 7f1af6fff000-7f1af77ff000 rw-p 00:00 0 7f1af77ff000-7f1af780 ---p 00:00 0 7f1af780-7f1af800 rw-p 00:00 0 7f1af800-7f1afb9cf000 rw-p 00:00 0 7f1afb9cf000-7f1afc00 ---p 00:00 0 7f1afc113000-7f1afc114000 ---p 00:00 0 7f1afc114000-7f1afc914000 rw-p 00:00 0 7f1afc914000-7f1afc915000 ---p 00:00 0 7f1afc915000-7f1afd115000 rw-p 00:00 0 7f1afd115000-7f1afe147000 r--p fc:00 13371109 /home/git/repositories/sggroup/storegrid.git/objects/pack/pack-a72ab4cf996276ca527a26c6711414e97828aa01.pack 7f1afe147000-7f1afe52d000 rw-p 00:00 0 7f1afe8ad000-7f1afe92e000 rw-p 00:00 0 7f1afe92e000-7f1afea57000 r--p fc:00 13371175 /home/git/repositories/sggroup/storegrid.git/objects/pack/pack-725eb21535f4d3782dce7c1f163c535ae46dd7a3.pack 7f1afea57000-7f1afeaab000 r--p fc:00 13371183 /home/git/repositories/sggroup/storegrid.git/objects/pack/pack-a242e26dd75d9f94ac7cc021b79b5a23be86f772.pack 7f1afeaab000-7f1afeb2d000 r--p fc:00 13371188 /home/git/repositories/sggroup/storegrid.git/objects/pack/pack-8df0b1d878ce57e7b81439bfbbed75da58298d4f.pack 7f1afeb2d000-7f1afed1c000 r--p fc:00 13371200 /home/git/repositories/sggroup/storegrid.git/objects/pack/pack-e7279a5e263e36487664846efd3cf8e326e28b52.pack 7f1afed1c000-7f1afee48000 r--p fc:00 13371324 /home/git/repositories/sggroup/storegrid.git/objects/pack/pack-b9440d0950347a7f42994eecb3e4b96ac6cba2ef.pack 7f1afee48000-7f1afef23000 r--p fc:00 13371272 /home/git/repositories/sggroup/storegrid.git/objects/pack/pack-334b5d2e30e802e8d11095d64348c61a6fabf4ab.pack 7f1afef23000-7f1b0028 r--p fc:00 13371511 /home/git/repositories/sggroup/storegrid.git/objects/pack/pack-89264699af6b413cbcba76e68866a9531693dc2e.pack 7f1b0028-7f1b00391000 r--p fc:00 13372427 /home/git/repositories/sggroup/storegrid.git/objects/pack/pack-c7d9d3af8fb96dd231186fcdb08c451e0aba3cc2.pack
Re: Git crash in Ubuntu 12.04
On Thu, 11 Apr 2013 15:50:31 +0530 Sivaram Kannan siva.de...@gmail.com wrote: [...] Output of coredump gdb: gitadmin@gitserver:/var/crash/dump$ gdb git CoreDump GNU gdb (Ubuntu/Linaro 7.4-2012.04-0ubuntu2.1) 7.4-2012.04 Copyright (C) 2012 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later http://gnu.org/licenses/gpl.html This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type show copying and show warranty for details. This GDB was configured as x86_64-linux-gnu. For bug reporting instructions, please see: http://bugs.launchpad.net/gdb-linaro/... Reading symbols from /usr/bin/git...(no debugging symbols found)...done. BFD: Warning: /var/crash/dump/CoreDump is truncated: expected core file size = 600195072, found: 1114112. ^^^ Try to issue the $ ulimit -c unlimited command in your shell before attempting the cloning -- this should remove the upper limit on the core file size. And try look for the core file in the current directory after the crash occurs. I'm not sure Ubuntu's crash interceptor won't kick in, but just in case... -- To unsubscribe from this list: send the line unsubscribe git in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Git crash in Ubuntu 12.04
Hi, I am using git with Gitlab/Gitolite configuration. Git version is 1.7.9.5 in Ubuntu 12.04. There has been a consistent git crash recently and have attached the /var/crash/_usr_lib_git-core_ git.1001.crash file. The crash output is pasted in the following link http://pastebin.com/uAQS81BX I removed some long binary information at the end of the file as pastebin does not allow more than 500k pasting. The crash is consistently happening and I am planning on for a debian deployment of gitlab. Please advice what could I do to solve this problem. ./Siva. -- To unsubscribe from this list: send the line unsubscribe git in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Git crash in Ubuntu 12.04
Sivaram Kannan siva.de...@gmail.com writes:
Hi,
I am using git with Gitlab/Gitolite configuration. Git version is
1.7.9.5 in Ubuntu 12.04. There has been a consistent git crash
recently and have attached the /var/crash/_usr_lib_git-core_
git.1001.crash file.
The crash output is pasted in the following link
http://pastebin.com/uAQS81BX
I removed some long binary information at the end of the file as
pastebin does not allow more than 500k pasting. The crash is
consistently happening and I am planning on for a debian deployment of
gitlab.
Can you tell us what command you ran, and also try to get a readable
backtrace from your installation?
It seems that the paste would have contained a core dump (you snipped
it9, but it would be pretty useless without the corresponding binary
anyway. Once you have the coredump in hand (as a file) you can use
gdb $(which git) the_coredump_file
and then in the GDB prompt, enter 'backtrace' and paste its output, to
give us an idea what is going on.
--
Thomas Rast
trast@{inf,student}.ethz.ch
--
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