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Posted to users@httpd.apache.org by Achal Kumar <ku...@gmail.com> on 2011/03/09 12:19:17 UTC
[users@httpd] core dumps in 2.2.15 and above
Hi,
I have created a bug 50834. I am load testing apache 2.2.15 with mod_proxy
and two upstream content servers. If I shut down a content server then
apache core dumps. I think the issue is related to the changes made in rev
916627 (cleanup changes)
Anyone else facing this issue?
Achal
Re: [users@httpd] core dumps in 2.2.15 and above
Posted by Achal Kumar <ku...@gmail.com>.
Actually, I take it back. We were able to reproduce the crash with 2.2.15
without the changes in rev 916627 but the frequency has gone down a little
bit. Now if I stop the upstream content server it crashes 20% of the time. I
am looking at the code changes between 2.2.14 and 2.2.15 but any help will
be appreciated.
I am running it on red hat linux.
Achal
2011/3/9 Achal Kumar <ku...@gmail.com>
> yes, I reverted the changes in rev 916627. I just changed all the calls
> from cleanup to destroy and I didn't see the issue any more. We are still
> validating this. The setup is very simple:
>
> 1. We are running a load of 1000 sessions with a loader using wgets.
> 2. Apache is configured using worker MPM and mod_proxy and we have two
> content servers each handling roughly 500 requests.
> 3. We shut down one content server and we see a core dump.
>
> gdb) bt full
> #0 0x0000003ac00306f7 in kill () from /lib64/libc.so.6
> No symbol table info available.
> #1 <signal handler called>
> No symbol table info available.
> #2 0x00002aaca7a2db89 in apr_brigade_cleanup (data=<value optimized out>) at
> buckets/apr_brigade.c:44
> b = (apr_bucket_brigade *) 0x0
> #3 0x00002aaca7c5b09d in run_cleanups (cref=0x1a99c068) at
> memory/unix/apr_pools.c:2308
> c = (cleanup_t *) 0x0
> #4 0x00002aaca7c5bb0e in apr_pool_destroy (pool=0x1a99c048) at
> memory/unix/apr_pools.c:779
> active = <value optimized out>
> allocator = <value optimized out>
> #5 0x000000000046d09d in ap_process_http_connection (c=0x1a980208) at
> http_core.c:199
> r = (request_rec *) 0x1a99c0c0
> csd = (apr_socket_t *) 0x0
> #6 0x000000000043fb22 in ap_run_process_connection (c=0x1a980208) at
> connection.c:43
> n = 0
> rv = 0
> #7 0x000000000048b094 in worker_thread (thd=0x1a7066f0, dummy=<value optimized
> out>) at worker.c:544
> process_slot = 8
> thread_slot = 1
> csd = (apr_socket_t *) 0x1a97fff0
> bucket_alloc = (apr_bucket_alloc_t *) 0x1a981f78
> last_ptrans = <value optimized out>
> ptrans = (apr_pool_t *) 0x1a97ff68
> rv = <value optimized out>
> is_idle = <value optimized out>
> #8 0x0000003ac08064a7 in start_thread () from /lib64/libpthread.so.0
> No symbol table info available.
> #9 0x0000003ac00d3c2d in clone () from /lib64/libc.so.6
> No symbol table info available.
>
>
>
> 2011/3/9 Igor Galić <i....@brainsware.org>
>
>
>>
>> ----- Original Message -----
>> > Hi,
>>
>> I achal,
>>
>> > I have created a bug 50834. I am load testing apache 2.2.15 with
>> > mod_proxy and two upstream content servers. If I shut down a content
>> > server then apache core dumps. I think the issue is related to the
>> > changes made in rev 916627 (cleanup changes)
>>
>> Thanks you for the report.
>>
>> > Anyone else facing this issue?
>>
>> Nope.. haven't heard of such behaviour yet.
>> Have you tried reverting the changes in r916627 and see if this issue
>> goes away?
>>
>>
>> > Achal
>>
>> i
>>
>> --
>> Igor Galić
>>
>> Tel: +43 (0) 664 886 22 883
>> Mail: i.galic@brainsware.org
>> URL: http://brainsware.org/
>>
>
>
>
> --
> Achal Kumar
>
> For blogging on cricket:-
> http://funcricket.blogspot.com/
>
--
Achal Kumar
For blogging on cricket:-
http://funcricket.blogspot.com/
Re: [users@httpd] core dumps in 2.2.15 and above
Posted by Achal Kumar <ku...@gmail.com>.
yes, I reverted the changes in rev 916627. I just changed all the calls from
cleanup to destroy and I didn't see the issue any more. We are still
validating this. The setup is very simple:
1. We are running a load of 1000 sessions with a loader using wgets.
2. Apache is configured using worker MPM and mod_proxy and we have two
content servers each handling roughly 500 requests.
3. We shut down one content server and we see a core dump.
gdb) bt full
#0 0x0000003ac00306f7 in kill () from /lib64/libc.so.6
No symbol table info available.
#1 <signal handler called>
No symbol table info available.
#2 0x00002aaca7a2db89 in apr_brigade_cleanup (data=<value optimized out>) at
buckets/apr_brigade.c:44
b = (apr_bucket_brigade *) 0x0
#3 0x00002aaca7c5b09d in run_cleanups (cref=0x1a99c068) at
memory/unix/apr_pools.c:2308
c = (cleanup_t *) 0x0
#4 0x00002aaca7c5bb0e in apr_pool_destroy (pool=0x1a99c048) at
memory/unix/apr_pools.c:779
active = <value optimized out>
allocator = <value optimized out>
#5 0x000000000046d09d in ap_process_http_connection (c=0x1a980208) at
http_core.c:199
r = (request_rec *) 0x1a99c0c0
csd = (apr_socket_t *) 0x0
#6 0x000000000043fb22 in ap_run_process_connection (c=0x1a980208) at
connection.c:43
n = 0
rv = 0
#7 0x000000000048b094 in worker_thread (thd=0x1a7066f0, dummy=<value optimized
out>) at worker.c:544
process_slot = 8
thread_slot = 1
csd = (apr_socket_t *) 0x1a97fff0
bucket_alloc = (apr_bucket_alloc_t *) 0x1a981f78
last_ptrans = <value optimized out>
ptrans = (apr_pool_t *) 0x1a97ff68
rv = <value optimized out>
is_idle = <value optimized out>
#8 0x0000003ac08064a7 in start_thread () from /lib64/libpthread.so.0
No symbol table info available.
#9 0x0000003ac00d3c2d in clone () from /lib64/libc.so.6
No symbol table info available.
2011/3/9 Igor Galić <i....@brainsware.org>
>
>
> ----- Original Message -----
> > Hi,
>
> I achal,
>
> > I have created a bug 50834. I am load testing apache 2.2.15 with
> > mod_proxy and two upstream content servers. If I shut down a content
> > server then apache core dumps. I think the issue is related to the
> > changes made in rev 916627 (cleanup changes)
>
> Thanks you for the report.
>
> > Anyone else facing this issue?
>
> Nope.. haven't heard of such behaviour yet.
> Have you tried reverting the changes in r916627 and see if this issue
> goes away?
>
>
> > Achal
>
> i
>
> --
> Igor Galić
>
> Tel: +43 (0) 664 886 22 883
> Mail: i.galic@brainsware.org
> URL: http://brainsware.org/
>
--
Achal Kumar
For blogging on cricket:-
http://funcricket.blogspot.com/
Re: [users@httpd] core dumps in 2.2.15 and above
Posted by Igor Galić <i....@brainsware.org>.
----- Original Message -----
> Hi,
I achal,
> I have created a bug 50834. I am load testing apache 2.2.15 with
> mod_proxy and two upstream content servers. If I shut down a content
> server then apache core dumps. I think the issue is related to the
> changes made in rev 916627 (cleanup changes)
Thanks you for the report.
> Anyone else facing this issue?
Nope.. haven't heard of such behaviour yet.
Have you tried reverting the changes in r916627 and see if this issue
goes away?
> Achal
i
--
Igor Galić
Tel: +43 (0) 664 886 22 883
Mail: i.galic@brainsware.org
URL: http://brainsware.org/
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Re: [users@httpd] core dumps in 2.2.15 and above
Posted by Igor Galić <i....@brainsware.org>.
----- Original Message -----
> Hi,
I achal,
> I have created a bug 50834. I am load testing apache 2.2.15 with
> mod_proxy and two upstream content servers. If I shut down a content
> server then apache core dumps. I think the issue is related to the
> changes made in rev 916627 (cleanup changes)
Thanks you for the report.
> Anyone else facing this issue?
Nope.. haven't heard of such behaviour yet.
Have you tried reverting the changes in r916627 and see if this issue
goes away?
> Achal
i
--
Igor Galić
Tel: +43 (0) 664 886 22 883
Mail: i.galic@brainsware.org
URL: http://brainsware.org/