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Posted to users@httpd.apache.org by Axel-Stéphane SMORGRAV <Ax...@europe.adp.com> on 2004/11/04 08:31:55 UTC
[users@httpd] mod_disk_cache causes SIGSEGV under load on Solaris 8
Good morning,
I am currently running load tests on an Apache 2.0.49 (worker MPM) caching proxy. After a few hours run, Apache child processes start dumping core
[Wed Nov 03 19:30:11 2004] [notice] child pid 14478 exit signal Segmentation fault (11), possible coredump in /centuri/axe1/apache/httpd2/apache6
This is the gdb stack dump:
#0 0xfee4f828 in strrchr () from /usr/lib/libc.so.1
(gdb) where
#0 0xfee4f828 in strrchr () from /usr/lib/libc.so.1
#1 0xff0f885c in apr_filepath_name_get ()
from /u01/opt/apache2/lib/libapr-0.so.0
#2 0xff0f88b8 in apr_filename_of_pathname ()
from /u01/opt/apache2/lib/libapr-0.so.0
#3 0x0008f290 in ap_scan_script_header_err_core ()
#4 0x0008fc68 in ap_scan_script_header_err ()
#5 0xfed02014 in read_headers ()
from /u01/opt/apache2/modules/mod_disk_cache.so
#6 0xfed25070 in cache_read_entity_headers ()
from /u01/opt/apache2/modules/mod_cache.so
#7 0xfed24c74 in cache_select_url ()
from /u01/opt/apache2/modules/mod_cache.so
#8 0xfed21ec4 in cache_url_handler ()
from /u01/opt/apache2/modules/mod_cache.so
#9 0x0007bc04 in ap_run_quick_handler ()
#10 0x0004e570 in ap_process_request ()
#11 0x00045890 in ap_process_http_connection ()
#12 0x00091314 in ap_run_process_connection ()
#13 0x00091904 in ap_process_connection ()
#14 0x00076154 in process_socket ()
#15 0x00076ca8 in worker_thread ()
#16 0xff110734 in dummy_worker () from /u01/opt/apache2/lib/libapr-0.so.0
#17 0xfedb58c8 in _lwp_start () from /usr/lib/lwp/libthread.so.1
#18 0xfedb58c8 in _lwp_start () from /usr/lib/lwp/libthread.so.1
bash-2.05$ find cache -type f ! -name \*header -a ! -name \*data
cache/aptmpI.ai0M
cache/aptmpYWaa0M
cache/aptmp5Vaa0M
cache/aptmp6Vaa0M
cache/aptmp0cbi0M
cache/aptmp2Waa0M
cache/aptmpzXaa0M
cache/aptmpFYaa0M
cache/aptmpbZaa0M
cache/aptmp1Zaa0M
[snip]
There are 88 of those for 20 documents cached.
When running "fuser -f <file>", none of the files are open by any process.
Cleaning up the cache (removing everything in the cache root) resolves the problem.
Anyone observed any thing like this before?
-ascs
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Re: [users@httpd] mod_disk_cache causes SIGSEGV under load on Solaris 8
Posted by Joshua Slive <js...@gmail.com>.
On Thu, 4 Nov 2004 08:31:55 +0100, Axel-Stéphane SMORGRAV
<ax...@europe.adp.com> wrote:
> Good morning,
>
> I am currently running load tests on an Apache 2.0.49 (worker MPM) caching proxy. After a few hours run, Apache child processes start dumping core
mod_disk_cache has seen very active development over the last few
releases, so you should use the most recent available 2.0 release
before trying to debug anything.
Joshua.
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