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Posted to bugs@httpd.apache.org by bu...@apache.org on 2015/10/09 11:21:29 UTC
[Bug 58491] New: Core dumps appear when the load increases
https://bz.apache.org/bugzilla/show_bug.cgi?id=58491
Bug ID: 58491
Summary: Core dumps appear when the load increases
Product: Apache httpd-2
Version: 2.4.16
Hardware: Other
OS: Linux
Status: NEW
Severity: major
Priority: P2
Component: mod_proxy_http
Assignee: bugs@httpd.apache.org
Reporter: sygoulmy@gmail.com
Hi,
We are currently facing an issue with Apache since our 2.4 upgrade. When the
load increase too much (250 hits/s) the http instance generates core files.
Here is the kind of core that we have :
Core was generated by `/tech/apache/runtime/httpd-2.4.16/bin/httpd -D
inst-switch -d /tech/apache -f /'.
Program terminated with signal 11, Segmentation fault.
#0 apr_pool_cleanup_register (p=0x400000010, data=0x3181c78,
plain_cleanup_fn=0x7f15bb4e7cc0 <thread_cond_cleanup>,
child_cleanup_fn=0x427b10 <ap...@plt>)
at memory/unix/apr_pools.c:2213
2213 memory/unix/apr_pools.c: No such file or directory.
in memory/unix/apr_pools.c
(gdb) bt
#0 apr_pool_cleanup_register (p=0x400000010, data=0x3181c78,
plain_cleanup_fn=0x7f15bb4e7cc0 <thread_cond_cleanup>,
child_cleanup_fn=0x427b10 <ap...@plt>)
at memory/unix/apr_pools.c:2213
#1 0x00007f15bb4e7de8 in apr_thread_cond_create (cond=0x3181c20,
pool=0x3181168) at locks/unix/thread_cond.c:55
#2 0x00007f15bb93f5ec in apr_reslist_create (reslist=0x1e46300, min=<value
optimized out>, smax=<value optimized out>, hmax=25, ttl=<value optimized out>,
con=<value optimized out>,
de=0x7f15b745a3e0 <connection_destructor>, params=0x291d9e8,
pool=0x3181168) at misc/apr_reslist.c:299
#3 0x00007f15b745af2d in ap_proxy_initialize_worker (worker=0x291d9e8,
s=0x1eaaa38, p=0x1e46148) at proxy_util.c:1848
#4 0x00007f15b7455cac in proxy_handler (r=0x7f1570002970) at mod_proxy.c:1087
#5 0x000000000044b210 in ap_run_handler ()
#6 0x000000000044f38e in ap_invoke_handler ()
#7 0x000000000046201a in ap_process_async_request ()
#8 0x000000000046217f in ap_process_request ()
#9 0x000000000045e4ce in ap_process_http_connection ()
#10 0x0000000000456020 in ap_run_process_connection ()
#11 0x00007f15ba0c7f2a in process_socket (thd=0x2fce5f0, dummy=<value optimized
out>) at worker.c:619
#12 worker_thread (thd=0x2fce5f0, dummy=<value optimized out>) at worker.c:978
#13 0x00007f15bac739d1 in start_thread () from /lib64/libpthread.so.0
#14 0x00007f15ba9c08fd in clone () from /lib64/libc.so.6
This http instance is a reverse proxy with the following configuration at
server level :
ProxyPreserveHost On
BalancerPersist On
RewriteRule /(.*) balancer://tomcat7_80/$1 [proxy]
With the balancer defined at the server level :
<Proxy balancer://tomcat7_80>
ProxySet lbmethod=bybusyness maxattempts=1
BalancerMember http://127.0.6.49:80 lbset=0 smax=0 ttl=3
connectiontimeout=2 retry=60
BalancerMember http://10.70.6.48:80 lbset=1 smax=0 ttl=3
connectiontimeout=2 retry=60
</Proxy>
We have the same configuration on live environment with a much higher load
without facing any issue with Apache 2.2.
Details about our platform :
- OS : RHEL 6.4
- Apache 2.4.16 compiled with apr-1.5.2 and apr-util-1.5.4
- MPM_worker
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[Bug 58491] Core dumps appear when the load increases
Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=58491
--- Comment #8 from clauser <er...@nokia.com> ---
We are having the same problem with the same error messages as in comment 6 in
our Apache error log files. These errors occur from time to time with a medium
to high load and result in a segmentation fault. The used Apache server version
is 2.4.12 (with mod_proxy, mod_proxy_ajp, mod_proxy_http).
Is there any feedback/solution for this problem? Was this solved with a newer
version of Apache?
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[Bug 58491] Core dumps appear when the load increases
Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=58491
--- Comment #3 from Yann Ylavic <yl...@gmail.com> ---
(In reply to Sylvain Goulmy from comment #2)
> Would you like that i add the new core dumps to the current ticket or should
> i open a ticket for each type of error ?
Please use this same ticket since the error may be a corrupted memory which
could be better diagnosed with other backtraces (the previous one made few
sense so far).
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[Bug 58491] Core dumps appear when the load increases
Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=58491
--- Comment #4 from Sylvain Goulmy <sy...@gmail.com> ---
Please find two core that appeared on the same http instance with an interval
of one minute :
Core was generated by `/tech/apache/runtime/httpd-2.4.16/bin/httpd -D
inst-switch -d /tech/apache -f /'.
Program terminated with signal 11, Segmentation fault.
#0 run_cleanups (pool=0x7f15bbf7a018) at memory/unix/apr_pools.c:2351
2351 memory/unix/apr_pools.c: No such file or directory.
in memory/unix/apr_pools.c
Missing separate debuginfos, use: debuginfo-install
AF-httpd-2.4.16-0-el6.4.x86_64
(gdb) bt full
#0 run_cleanups (pool=0x7f15bbf7a018) at memory/unix/apr_pools.c:2351
c = 0x2e362e302e373231
#1 apr_pool_destroy (pool=0x7f15bbf7a018) at memory/unix/apr_pools.c:804
active = <value optimized out>
allocator = <value optimized out>
#2 0x00007f15b745a3fb in connection_destructor (resource=<value optimized
out>, params=<value optimized out>, pool=<value optimized out>) at
proxy_util.c:1499
conn = <value optimized out>
#3 0x00007f15bb93f315 in destroy_resource (reslist=0x31d9600,
resource=0x7f15a7df1ac8) at misc/apr_reslist.c:135
No locals.
#4 apr_reslist_acquire (reslist=0x31d9600, resource=0x7f15a7df1ac8) at
misc/apr_reslist.c:345
rv = <value optimized out>
res = 0x31d9638
now = 1445846735860297
#5 0x00007f15b745a969 in ap_proxy_acquire_connection
(proxy_function=0x7f15b724a1fe "HTTP", conn=0x7f15a7df1ac8, worker=0x31b77c8,
s=0x2c8a4a8) at proxy_util.c:2125
rv = <value optimized out>
#6 0x00007f15b7247879 in proxy_http_handler (r=0x7f155c006990,
worker=0x31b77c8, conf=0x1edfd38,
url=0x7f155c003488
"http://127.0.6.48/UpdateMyAccountCustomerWS/ws/passenger/marketing/000443v05",
proxyname=0x0, proxyport=0) at mod_proxy_http.c:1957
status = <value optimized out>
server_portstr =
"\001\000\000\000\000\000\000\000\225\312h\270\025\177\000\000\000\000\000\000\000\000\000\000\344\217N\273\025\177\000"
scheme = 0x7f155c003530 "http"
proxy_function = 0x7f15b724a1fe "HTTP"
u = <value optimized out>
backend = 0x0
is_ssl = 0
c = 0x7f159c01f968
retry = 0
p = 0x7f155c006918
uri = 0x7f155c0034d8
Core was generated by `/tech/apache/runtime/httpd-2.4.16/bin/httpd -D
inst-switch -d /tech/apache -f /'.
Program terminated with signal 11, Segmentation fault.
#0 0x00007f15bb93efbd in get_container (reslist=0x31d9760) at
misc/apr_reslist.c:97
97 misc/apr_reslist.c: No such file or directory.
in misc/apr_reslist.c
Missing separate debuginfos, use: debuginfo-install
AF-httpd-2.4.16-0-el6.4.x86_64
(gdb) bt full
#0 0x00007f15bb93efbd in get_container (reslist=0x31d9760) at
misc/apr_reslist.c:97
res = 0x31d9780
#1 0x00007f15bb93f02e in create_resource (reslist=0x31d9760,
ret_res=0x7f15afffe868) at misc/apr_reslist.c:121
rv = 52270976
res = <value optimized out>
#2 0x00007f15bb93f416 in apr_reslist_acquire (reslist=0x31d9760,
resource=0x7f15afffeac8) at misc/apr_reslist.c:395
rv = <value optimized out>
res = 0x81
now = 1445846790718097
#3 0x00007f15b745a969 in ap_proxy_acquire_connection
(proxy_function=0x7f15b724a1fe "HTTP", conn=0x7f15afffeac8, worker=0x31b77c8,
s=0x2c8a4a8) at proxy_util.c:2125
rv = <value optimized out>
#4 0x00007f15b7247879 in proxy_http_handler (r=0x7f158c002970,
worker=0x31b77c8, conf=0x1edfd38,
url=0x7f158c0074a8
"http://127.0.6.48/UpdateMyAccountCustomerWS/ws/passenger/marketing/000443v05",
proxyname=0x0, proxyport=0) at mod_proxy_http.c:1957
status = <value optimized out>
server_portstr = "p\032\276\002", '\000' <repeats 12 times>,
"wh?\025\177\000\000\063\242N\273\025\177\000"
scheme = 0x7f158c007550 "http"
proxy_function = 0x7f15b724a1fe "HTTP"
u = <value optimized out>
backend = 0x0
is_ssl = 0
c = 0x7f15b0007368
retry = 0
p = 0x7f158c0028f8
uri = 0x7f158c0074f8
#5 0x00007f15b7450f12 in proxy_run_scheme_handler (r=0x7f158c002970,
worker=0x31b77c8, conf=0x1edfd38,
url=0x7f158c0074a8
"http://127.0.6.48/UpdateMyAccountCustomerWS/ws/passenger/marketing/000443v05",
proxyhost=0x0, proxyport=0) at mod_proxy.c:2789
pHook = <value optimized out>
n = <value optimized out>
rv = -1
Once again, i have checked that there was no configuration reload or any
balancer updates at that time.
I have kept the core files if necessary.
Hope it helps.
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[Bug 58491] Core dumps appear when the load increases
Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=58491
--- Comment #2 from Sylvain Goulmy <sy...@gmail.com> ---
Sorry for this late answer.
The definitons of the balancer members are static, we don't add/remove any
definitons during runtime.
The status can be modified during runtime by disabling/enabling a member with
the balancer manager. However i have checked in the log files, the status of
the balancer members have NOT been modified when the core dump appeared.
Besides that we still have many core dumps on this http instance but many of
them are different from the one i submited. They are still relative to the
mod_proxy module but some of them appears during request processing and not
process launching.
Would you like that i add the new core dumps to the current ticket or should i
open a ticket for each type of error ?
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[Bug 58491] Core dumps appear when the load increases
Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=58491
--- Comment #7 from Sylvain Goulmy <sy...@gmail.com> ---
Hi,
After removing the BalancerPersist directive the core dumps stop appearing for
four days now whereas we used to have one or several core files by day.
I'll give you a new update in a week to confirm that this directive is the root
cause.
Rgds.
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[Bug 58491] Core dumps appear when the load increases
Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=58491
--- Comment #11 from clauser <er...@nokia.com> ---
We don't use BalancerPersist
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[Bug 58491] Core dumps appear when the load increases
Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=58491
--- Comment #13 from Yann Ylavic <yl...@gmail.com> ---
(In reply to clauser from comment #11)
> We don't use BalancerPersist
This is another case than this report, please open a new one.
Also we are unlikely to debug 2.4.12 anymore, you should try to upgrade to the
latest version (2.4.43 as of now) to see of your issue is not already fixed.
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[Bug 58491] Core dumps appear when the load increases
Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=58491
--- Comment #12 from clauser <er...@nokia.com> ---
Some more detail on the errors in error log file:
[proxy_ajp:error] [pid 46560:tid 139774671161088] (104)Connection reset by
peer: AH01030: ajp_ilink_receive() can't receive header
[proxy:error] [pid 38358:tid 140030871824128] (70007)The timeout specified has
expired: AH00941: AJP: failed to acquire connection for (...)
[proxy:error] [pid 40342:tid 140030756435712] AH00940: AJP: disabled
connection for (...)
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[Bug 58491] Core dumps appear when the load increases
Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=58491
--- Comment #6 from Sylvain Goulmy <sy...@gmail.com> ---
Hi,
Today i have had two more cores on my http instance in get_container method.
These two cores were linked to the following error message in the error log :
[Tue Nov 03 11:40:49.837710 2015] [proxy_http:error] [pid 18490:tid
139811338880768] [client 10.70.1.43:48219] AH01114: HTTP: failed to make
connection to backend: 127.0.6.57
[Tue Nov 03 12:29:28.355655 2015] [proxy:error] [pid 13344:tid 139811349370624]
(70007)The timeout specified has expired: AH00941: HTTP: failed to acquire
connection for (127.0.6.57)
[Tue Nov 03 12:29:28.355723 2015] [proxy_http:error] [pid 13344:tid
139811359860480] [client 10.70.1.43:17359] AH01114: HTTP: failed to make
connection to backend: 127.0.6.57
[Tue Nov 03 12:29:29.346693 2015] [core:notice] [pid 30780:tid 139811468363584]
AH00051: child pid 13344 exit signal Segmentation fault (11), possible coredump
in /tech/apache/var/logs/switch
[Tue Nov 03 12:59:42.492382 2015] [proxy:error] [pid 14803:tid 139811251812096]
(70007)The timeout specified has expired: AH00941: HTTP: failed to acquire
connection for (127.0.6.57)
[Tue Nov 03 12:59:42.492369 2015] [proxy:error] [pid 14803:tid 139811241322240]
(70007)The timeout specified has expired: AH00941: HTTP: failed to acquire
connection for (127.0.6.57)
[Tue Nov 03 12:59:42.492432 2015] [proxy_http:error] [pid 14371:tid
139811338880768] [client 10.70.1.43:6279] AH01114: HTTP: failed to make
connection to backend: 127.0.6.57
[Tue Nov 03 12:59:42.492524 2015] [proxy:error] [pid 14803:tid 139811338880768]
(70007)The timeout specified has expired: AH00941: HTTP: failed to acquire
connection for (127.0.6.57)
[Tue Nov 03 12:59:48.489341 2015] [core:notice] [pid 30780:tid 139811468363584]
AH00051: child pid 14803 exit signal Segmentation fault (11), possible coredump
in /tech/apache/var/logs/switch
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[Bug 58491] Core dumps appear when the load increases
Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=58491
Yann Ylavic <yl...@gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ylavic.dev@gmail.com
--- Comment #1 from Yann Ylavic <yl...@gmail.com> ---
Do you insert/update load-balancer members via the balancer-manager during
runtime?
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[Bug 58491] Core dumps appear when the load increases
Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=58491
Joël Benzenou <jo...@gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |joel.benzenou@gmail.com
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[Bug 58491] Core dumps appear when the load increases
Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=58491
--- Comment #5 from Sylvain Goulmy <sy...@gmail.com> ---
Hi,
For information, i have upgraded to Apache 2.4.17, since i have had two new
cores :
The first one :
#0 0x00007f8531da63a0 in pthread_mutex_lock () from /lib64/libpthread.so.0
No symbol table info available.
#1 0x00007f8532a70076 in apr_reslist_maintain (reslist=0x17c9630) at
misc/apr_reslist.c:184
now = <value optimized out>
rv = <value optimized out>
res = <value optimized out>
created_one = 0
#2 0x00007f8532a705fe in apr_reslist_create (reslist=0xc3f230, min=<value
optimized out>, smax=<value optimized out>, hmax=25, ttl=<value optimized out>,
con=<value optimized out>,
de=0x7f852e58a440 <connection_destructor>, params=0x12b6698,
pool=0x17c92d8) at misc/apr_reslist.c:305
rv = 0
rl = 0x17c9630
#3 0x00007f852e58afdd in ap_proxy_initialize_worker (worker=0x12b6698,
s=0xc34110, p=0xc3f0e8) at proxy_util.c:1854
rv = <value optimized out>
mpm_threads = 32645
#4 0x00007f852e585c73 in proxy_handler (r=0x7f8508002970) at mod_proxy.c:1088
url = 0x7f8508007148 "http://127.0.6.65/daemon/ws/COMET32_AMADEUS"
uri = 0x7f8508007086 "balancer://tomcat6_80/daemon/ws/COMET32_AMADEUS"
scheme = 0x7f85080070e8 "balancer"
p = <value optimized out>
p2 = <value optimized out>
sconf = <value optimized out>
conf = 0xc3aef8
proxies = 0xc3b028
ents = 0xc361f8
i = <value optimized out>
access_status = 0
direct_connect = <value optimized out>
str = <value optimized out>
maxfwd = <value optimized out>
balancer = 0x12ad028
worker = 0x12b6698
attempts = 0
max_attempts = 0
list = <value optimized out>
saved_status = <value optimized out>
#5 0x000000000044ce00 in ap_run_handler ()
No symbol table info available.
#6 0x0000000000450f7e in ap_invoke_handler ()
No symbol table info available.
#7 0x00000000004641ba in ap_process_async_request ()
No symbol table info available.
#8 0x000000000046431f in ap_process_request ()
No symbol table info available.
#9 0x000000000046065e in ap_process_http_connection ()
No symbol table info available.
#10 0x0000000000457d30 in ap_run_process_connection ()
No symbol table info available.
With the following messages in the error log :
[Fri Oct 30 06:18:20.094520 2015] [mpm_worker:emerg] [pid 1804:tid
140209616217856] (35)Resource deadlock avoided: AH00272: apr_proc_mutex_lock
failed before this child process served any requests.
[Fri Oct 30 11:27:34.378987 2015] [core:notice] [pid 20080:tid 140210063746880]
AH00051: child pid 6479 exit signal Segmentation fault (11), possible coredump
in /tech/apache/var/logs/switch
And the second one :
#0 ap_proxy_connect_backend (proxy_function=0x7f286014c1fe "HTTP",
conn=0x298d300, worker=0x2281ef8, s=0x1e69448) at proxy_util.c:2706
rv = <value optimized out>
connected = 0
loglevel = <value optimized out>
backend_addr = 0x612e6474732e3034
local_addr = <value optimized out>
newsock = 0x2997540
sconf = <value optimized out>
conf = 0x1c07ef8
#1 0x00007f28601499dc in proxy_http_handler (r=0x7f2834002970,
worker=0x2281ef8, conf=0x1c07ef8, url=0x7f28340073e0
"http://127.0.6.48/TravelDbServices/ws/ProvideTravelDbPassengerList-v1",
proxyname=0x0, proxyport=0) at mod_proxy_http.c:1991
locurl = 0x7f28340074e8
"/TravelDbServices/ws/ProvideTravelDbPassengerList-v1"
status = 0
server_portstr = "\000\342\370\002", '\000' <repeats 12 times>,
"w\230\267c(\177\000\000\063\322>d(\177\000"
scheme = <value optimized out>
proxy_function = 0x7f286014c1fe "HTTP"
u = <value optimized out>
backend = 0x298d300
is_ssl = 36183800
c = 0x7f2844002d28
retry = <value optimized out>
p = 0x7f28340028f8
uri = 0x7f2834007428
#2 0x00007f2860352ef2 in proxy_run_scheme_handler (r=0x7f2834002970,
worker=0x2281ef8, conf=0x1c07ef8,
url=0x7f28340073e0
"http://127.0.6.48/TravelDbServices/ws/ProvideTravelDbPassengerList-v1",
proxyhost=0x0, proxyport=0) at mod_proxy.c:2806
pHook = <value optimized out>
n = <value optimized out>
rv = -1
#3 0x00007f2860357f77 in proxy_handler (r=0x7f2834002970) at mod_proxy.c:1162
url = 0x7f28340073e0
"http://127.0.6.48/TravelDbServices/ws/ProvideTravelDbPassengerList-v1"
uri = 0x7f28340072ce
"balancer://tomcat7_80/TravelDbServices/ws/ProvideTravelDbPassengerList-v1"
scheme = 0x7f2834007360 "balancer"
p = <value optimized out>
p2 = <value optimized out>
sconf = <value optimized out>
conf = 0x1c07ef8
proxies = 0x1c08028
ents = 0x1c031f8
i = <value optimized out>
access_status = 0
direct_connect = <value optimized out>
str = <value optimized out>
maxfwd = <value optimized out>
balancer = 0x227e128
worker = 0x2281ef8
attempts = 0
max_attempts = 1
list = <value optimized out>
saved_status = <value optimized out>
With the following messages in the error log :
[Thu Oct 29 19:53:32.564666 2015] [proxy:error] [pid 31761:tid 139811349370624]
(22)Invalid argument: AH00957: HTTP: attempt to connect to ?:21768 (127.0.6.48)
failed
[Thu Oct 29 19:53:32.564661 2015] [proxy:error] [pid 31761:tid 139811359860480]
(22)Invalid argument: AH00957: HTTP: attempt to connect to ?:21768 (127.0.6.48)
failed
[Thu Oct 29 19:53:33.555683 2015] [core:notice] [pid 30780:tid 139811468363584]
AH00051: child pid 31761 exit signal Bus error (7), possible coredump in
/tech/apache/var/logs/switch
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[Bug 58491] Core dumps appear when the load increases
Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=58491
--- Comment #9 from Yann Ylavic <yl...@gmail.com> ---
2.4.12 is rather old (more than 5 years back), the crash (Segmentation fault)
can be anything fixed since then, or not. We need more informations to
diagnose, like coredump backtrace.
Regarding this PR, do you happen to use BalancerPersist in your configuration
too?
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[Bug 58491] Core dumps appear when the load increases
Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=58491
Antoine Prevosto <an...@gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |antoine.prevosto@gmail.com
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[Bug 58491] Core dumps appear when the load increases
Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=58491
--- Comment #10 from clauser <er...@nokia.com> ---
Some (part of) coredump traces:
#0 0x00007f10581fbf6b in apr_reslist_acquire () from
/opt/usr/local/apache2/lib/libaprutil-1.so.0
#1 0x00007f10549d8f2a in ap_proxy_acquire_connection () from
/opt/usr/local/apache2/modules/mod_proxy.so
#2 0x00007f105375ab7e in proxy_ajp_handler () from
/opt/usr/local/apache2/modules/mod_proxy_ajp.so
#3 0x00007f10549d3c5c in proxy_run_scheme_handler () from
/opt/usr/local/apache2/modules/mod_proxy.so
#4 0x00007f10549d4b96 in proxy_handler () from
/opt/usr/local/apache2/modules/mod_proxy.so
#5 0x0000000000447540 in ap_run_handler ()
#6 0x0000000000447ad6 in ap_invoke_handler ()
#7 0x000000000045b5d3 in ap_internal_redirect_handler ()
#0 0x00007f36a7fbbcf6 in apr_palloc () from
/opt/usr/local/apache2/lib/libapr-1.so.0
#1 0x00007f36a7fb2269 in apr_pmemdup () from
/opt/usr/local/apache2/lib/libapr-1.so.0
#2 0x00007f36a339483d in ap_proxy_determine_connection () from
/opt/usr/local/apache2/modules/mod_proxy.so
#3 0x00007f36a317be1a in proxy_http_handler () from
/opt/usr/local/apache2/modules/mod_proxy_http.so
#4 0x00007f36a338bc5c in proxy_run_scheme_handler () from
/opt/usr/local/apache2/modules/mod_proxy.so
#5 0x00007f36a338cb96 in proxy_handler () from
/opt/usr/local/apache2/modules/mod_proxy.so
#6 0x0000000000447540 in ap_run_handler ()
#7 0x0000000000447ad6 in ap_invoke_handler ()
#8 0x000000000045b5d3 in ap_internal_redirect_handler ()
#0 0x00007f36a3390ef5 in ap_proxy_acquire_connection () from
/opt/usr/local/apache2/modules/mod_proxy.so
#1 0x00007f36a317bd31 in proxy_http_handler () from
/opt/usr/local/apache2/modules/mod_proxy_http.so
#2 0x00007f36a338bc5c in proxy_run_scheme_handler () from
/opt/usr/local/apache2/modules/mod_proxy.so
#3 0x00007f36a338cb96 in proxy_handler () from
/opt/usr/local/apache2/modules/mod_proxy.so
#4 0x0000000000447540 in ap_run_handler ()
#5 0x0000000000447ad6 in ap_invoke_handler ()
#6 0x000000000045b5d3 in ap_internal_redirect_handler ()
Errors seen in the error log file:
(104)Connection reset by peer: AH01030: ajp_ilink_receive() can't receive
header
(70007)The timeout specified has expired: AH00941: AJP: failed to acquire
connection for ...
AH00940: AJP: disabled connection for ...
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