Re: frequent crashes on SL4, posted by Devin Bougie on Sat Feb 7 01:47:07 2009
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> The bad news is that elogd is still crashing even after disabling Image Magick. The good news is that this time it was reproducible and I did obtain a
> stack trace using gdb.
The seg fault reported above seems to be related to a specific elog entry combined with sending email notifications. When trying to submit changes to that entry while sending email notifications, elogd seg faults. We can edit the entry before it and create and edit a new entry after
it. Trying to edit that one entry and send notifications, however, reliably crashes elogd. If I check "supress email notification", elogd does not seem to crash. I have replicated this on separate elog servers running both SL4 and on SL5. To compare with SL4, here is the trace I see on SL5 (Scientific Linux 5).
Once I receive the OK, I will send you the actual file that stores the problematic entry. Please let me know if there is anything else I can send you.
Many thanks,
Devin
------
[root@lnx767 ~]# gdb /usr/local/sbin/elogd 13328
GNU gdb Red Hat Linux (6.5-37.el5_2.2rh)
Copyright (C) 2006 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "i386-redhat-linux-gnu"...(no debugging symbols found)
Using host libthread_db library "/lib/libthread_db.so.1".
Attaching to program: /usr/local/sbin/elogd, process 13328
Reading symbols from /lib/libssl.so.6...(no debugging symbols found)...done.
Loaded symbols for /lib/libssl.so.6
Reading symbols from /lib/libc.so.6...(no debugging symbols found)...done.
Loaded symbols for /lib/libc.so.6
Reading symbols from /usr/lib/libgssapi_krb5.so.2...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/libgssapi_krb5.so.2
Reading symbols from /usr/lib/libkrb5.so.3...
(no debugging symbols found)...done.
Loaded symbols for /usr/lib/libkrb5.so.3
Reading symbols from /lib/libcom_err.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib/libcom_err.so.2
Reading symbols from /usr/lib/libk5crypto.so.3...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/libk5crypto.so.3
Reading symbols from /lib/libresolv.so.2...
(no debugging symbols found)...done.
Loaded symbols for /lib/libresolv.so.2
Reading symbols from /lib/libcrypto.so.6...(no debugging symbols found)...done.
Loaded symbols for /lib/libcrypto.so.6
Reading symbols from /lib/libdl.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib/libdl.so.2
Reading symbols from /usr/lib/libz.so.1...
(no debugging symbols found)...done.
Loaded symbols for /usr/lib/libz.so.1
Reading symbols from /lib/ld-linux.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib/ld-linux.so.2
Reading symbols from /usr/lib/libkrb5support.so.0...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/libkrb5support.so.0
Reading symbols from /lib/libkeyutils.so.1...
(no debugging symbols found)...done.
Loaded symbols for /lib/libkeyutils.so.1
Reading symbols from /lib/libselinux.so.1...(no debugging symbols found)...done.
Loaded symbols for /lib/libselinux.so.1
Reading symbols from /lib/libsepol.so.1...(no debugging symbols found)...done.
Loaded symbols for /lib/libsepol.so.1
Reading symbols from /lib/libnss_files.so.2...
(no debugging symbols found)...done.
Loaded symbols for /lib/libnss_files.so.2
Reading symbols from /lib/libnss_nis.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib/libnss_nis.so.2
Reading symbols from /lib/libnsl.so.1...(no debugging symbols found)...done.
Loaded symbols for /lib/libnsl.so.1
(no debugging symbols found)
0x008db402 in __kernel_vsyscall ()
(gdb) c
Continuing.
(no debugging symbols found)
Program received signal SIGSEGV, Segmentation fault.
0x0804a125 in strieq ()
(gdb) where
#0 0x0804a125 in strieq ()
#1 0x73207365 in ?? ()
#2 0x00000000 in ?? () |
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Re: frequent crashes on SL4, posted by Devin Bougie on Sat Feb 7 01:59:53 2009
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Hi Stefan,
I hope I'm not bombarding you, but we seem to be seeing crashes in two separate scenarios. In addition to the crashes I previously reported (editing a problematic entry and sending notifications), we
have a (seemingly) separate means of crashing elogd.
One of our users connects from home using a satellite network (bursty and high latency). Any time he attempts to upload an image from this connection, elogd crashes. He has not yet seen any
problems when using the same computer on site. Here are the stack traces I've obtained, first on SL4, then on SL5. Again, please let me know if there is any other information I can provide.
Thank you very much for your time and effort.
Sincerely,
Devin
------
[root@lnx100 ~]# gdb /usr/local/sbin/elogd 3728
GNU gdb Red Hat Linux (6.3.0.0-1.143.el4rh)
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "i386-redhat-linux-gnu"...(no debugging symbols found)
Using host libthread_db library "/lib/tls/libthread_db.so.1".
Attaching to program: /usr/local/sbin/elogd, process 3728
Reading symbols from /lib/libssl.so.4...(no debugging symbols found)...done.
Loaded symbols for /lib/libssl.so.4
Reading symbols from /lib/tls/libc.so.6...(no debugging symbols found)...done.
Loaded symbols for /lib/tls/libc.so.6
Reading symbols from /usr/lib/libgssapi_krb5.so.2...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/libgssapi_krb5.so.2
Reading symbols from /usr/lib/libkrb5.so.3...
(no debugging symbols found)...done.
Loaded symbols for /usr/lib/libkrb5.so.3
Reading symbols from /lib/libcom_err.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib/libcom_err.so.2
Reading symbols from /usr/lib/libk5crypto.so.3...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/libk5crypto.so.3
Reading symbols from /lib/libresolv.so.2...
(no debugging symbols found)...done.
Loaded symbols for /lib/libresolv.so.2
Reading symbols from /lib/libcrypto.so.4...(no debugging symbols found)...done.
Loaded symbols for /lib/libcrypto.so.4
Reading symbols from /lib/libdl.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib/libdl.so.2
Reading symbols from /usr/lib/libz.so.1...
(no debugging symbols found)...done.
Loaded symbols for /usr/lib/libz.so.1
Reading symbols from /lib/ld-linux.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib/ld-linux.so.2
Reading symbols from /lib/libnss_files.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib/libnss_files.so.2
Reading symbols from /lib/libnss_nis.so.2...
(no debugging symbols found)...done.
Loaded symbols for /lib/libnss_nis.so.2
Reading symbols from /lib/libnsl.so.1...(no debugging symbols found)...done.
Loaded symbols for /lib/libnsl.so.1
0x008c17a2 in _dl_sysinfo_int80 ()
from /lib/ld-linux.so.2
(gdb) c
Continuing.
Program received signal SIGSEGV, Segmentation fault.
0x080af727 in decode_post ()
(gdb) where
#0 0x080af727 in decode_post ()
#1 0x00000000 in ?? ()
(gdb) quit
The program is running. Quit anyway (and detach it)? (y or n) y
Detaching from program: /usr/local/sbin/elogd, process 3728
----
[root@lnx767 ~]# gdb /usr/local/sbin/elogd 13111
GNU gdb Red Hat Linux (6.5-37.el5_2.2rh)
Copyright (C) 2006 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "i386-redhat-linux-gnu"...(no debugging symbols found)
Using host libthread_db library "/lib/libthread_db.so.1".
Attaching to program: /usr/local/sbin/elogd, process 13111
Reading symbols from /lib/libssl.so.6...(no debugging symbols found)...done.
Loaded symbols for /lib/libssl.so.6
Reading symbols from /lib/libc.so.6...(no debugging symbols found)...done.
Loaded symbols for /lib/libc.so.6
Reading symbols from /usr/lib/libgssapi_krb5.so.2...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/libgssapi_krb5.so.2
Reading symbols from /usr/lib/libkrb5.so.3...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/libkrb5.so.3
Reading symbols from /lib/libcom_err.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib/libcom_err.so.2
Reading symbols from /usr/lib/libk5crypto.so.3...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/libk5crypto.so.3
Reading symbols from /lib/libresolv.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib/libresolv.so.2
Reading symbols from /lib/libcrypto.so.6...
(no debugging symbols found)...done.
Loaded symbols for /lib/libcrypto.so.6
Reading symbols from /lib/libdl.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib/libdl.so.2
Reading symbols from /usr/lib/libz.so.1...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/libz.so.1
Reading symbols from /lib/ld-linux.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib/ld-linux.so.2
Reading symbols from /usr/lib/libkrb5support.so.0...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/libkrb5support.so.0
Reading symbols from /lib/libkeyutils.so.1...(no debugging symbols found)...done.
Loaded symbols for /lib/libkeyutils.so.1
Reading symbols from /lib/libselinux.so.1...(no debugging symbols found)...done.
Loaded symbols for /lib/libselinux.so.1
Reading symbols from /lib/libsepol.so.1...
(no debugging symbols found)...done.
Loaded symbols for /lib/libsepol.so.1
Reading symbols from /lib/libnss_files.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib/libnss_files.so.2
Reading symbols from /lib/libnss_nis.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib/libnss_nis.so.2
Reading symbols from /lib/libnsl.so.1...(no debugging symbols found)...done.
Loaded symbols for /lib/libnsl.so.1
(no debugging symbols found)
0x00308402 in __kernel_vsyscall ()
(gdb) c
Continuing.
Program received signal SIGSEGV, Segmentation fault.
0x080b2f8a in decode_post ()
(gdb) where
#0 0x080b2f8a in decode_post ()
#1 0x00000100 in ?? ()
#2 0x00000000 in ?? () |
Re: frequent crashes on SL4, posted by Devin Bougie on Sat Feb 7 06:26:48 2009 
|
Hi Stefan,
Just incase it helps, I am attaching the file for an entry in our demo logbook. If I edit this entry and click on submit (without checking "suppress email notification"), I get the seg fault shown below.
If I delete any single character from the entry, I do not see any problems. If I re-insert a character anywhere, the problem returns.
I hope this is useful.
Thanks again,
Devin
------
[root@lnx100 ~]# gdb /usr/local/sbin/elogd 6040
GNU gdb Red Hat Linux (6.3.0.0-1.143.el4rh)
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "i386-redhat-linux-gnu"...(no debugging symbols found)
Using host libthread_db library "/lib/tls/libthread_db.so.1".
Attaching to program: /usr/local/sbin/elogd, process 6040
Reading symbols from /lib/libssl.so.4...(no debugging symbols found)...done.
Loaded symbols for /lib/libssl.so.4
Reading symbols from /lib/tls/libc.so.6...(no debugging symbols found)...done.
Loaded symbols for /lib/tls/libc.so.6
Reading symbols from /usr/lib/libgssapi_krb5.so.2...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/libgssapi_krb5.so.2
Reading symbols from /usr/lib/libkrb5.so.3...
(no debugging symbols found)...done.
Loaded symbols for /usr/lib/libkrb5.so.3
Reading symbols from /lib/libcom_err.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib/libcom_err.so.2
Reading symbols from /usr/lib/libk5crypto.so.3...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/libk5crypto.so.3
Reading symbols from /lib/libresolv.so.2...
(no debugging symbols found)...done.
Loaded symbols for /lib/libresolv.so.2
Reading symbols from /lib/libcrypto.so.4...(no debugging symbols found)...done.
Loaded symbols for /lib/libcrypto.so.4
Reading symbols from /lib/libdl.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib/libdl.so.2
Reading symbols from /usr/lib/libz.so.1...
(no debugging symbols found)...done.
Loaded symbols for /usr/lib/libz.so.1
Reading symbols from /lib/ld-linux.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib/ld-linux.so.2
Reading symbols from /lib/libnss_files.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib/libnss_files.so.2
Reading symbols from /lib/libnss_nis.so.2...
(no debugging symbols found)...done.
Loaded symbols for /lib/libnss_nis.so.2
Reading symbols from /lib/libnsl.so.1...(no debugging symbols found)...done.
Loaded symbols for /lib/libnsl.so.1
0x008c17a2 in _dl_sysinfo_int80 ()
from /lib/ld-linux.so.2
(gdb) c
Continuing.
Program received signal SIGSEGV, Segmentation fault.
0x080ad900 in interprete ()
(gdb) where
#0 0x080ad900 in interprete ()
#1 0x00000031 in ?? ()
#2 0x000005dc in ?? ()
#3 0x00000000 in ?? () |
|
Re: frequent crashes on SL4, posted by Devin Bougie on Tue Mar 24 15:14:28 2009
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Indeed, uploading images over a satellite connection does not crash the development ELOG server available from SVN. Our user was unable to
crash
elogd (or upload an image) and reports "The upload window would complain about an "upstream server", but the site was still there."
Thank you very much for your time and help (with both of the issues reported in this thread).
Sincerely,
Devin |
attachment not displayed if entry contains link to attachment., posted by Devin Bougie on Mon Jul 27 18:02:14 2009
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I'm not sure if this is the expected behavior, but it appears as though an attachment is not displayed in the list of attachments if you manually add a link to the attachment into the body of the entry. I would greatly appreciate any advice on how to fix or change this behavior.
I will try to demonstrate with the two attachments on this entry. There are two attachments in this entry, but only one appears in the standard view of the entry.
Picture_1.png.png
Many thanks,
Devin |
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no "submit changes" pop-up with HTML editor, posted by Devin Bougie on Thu Sep 10 21:43:29 2009
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When locks are enabled, users should see a pop-up window asking them to submit an entry if they edit an entry but then go away from that page or
close the browser without submitting the changes. However, it only appears as though this works when using the plain or ELCode editors. When
using the HTML editor, no such pop-up appears.
If possible, a fix for this would be greatly appreciated.
Many thanks,
Devin |
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difficulty with slow connections (was Re: frequent crashes on SL4), posted by Devin Bougie on Wed Mar 3 22:28:04 2010
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Hi, Stefan. When someone using a satellite connection tries to upload an attachment *or* edit a long entry, it fails and they are presented
with an "Internal Server Error." This is a huge improvement over the previous behavior of crashing elogd, but we were wondering if there is any
hope of improving this further so that one can edit large entries or upload attachments over a slow (in this case, satellite) connection. Do
you have any ideas or plans on working on this further? Apparently ELOG is the "only" service this user has trouble with from home.
Any information you could provide would be greatly appreciated.
Many thanks,
Devin |
|
difficulty with slow connections (was Re: frequent crashes on SL4), posted by Devin Bougie on Wed Sep 8 15:31:33 2010
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Hi Stefan,
> There was a timeout of 1 sec. in the elogd daemon, which probably is too short for a satellite connection. Unfortunately I have no satellite here
> around to test it, so I "blindly" increased it to 6 seconds in the current SVN version. Please give it a try.
The latest release (2.8.0-2313) does fix this problem. Our user is now able to modify entries and upload attachments using their satellite connection.
Thank you very much for your time and help. I am sorry I didn't receive this in time to help test the old SVN version.
Sincerely,
Devin |
|