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From bugzi...@apache.org
Subject [Bug 58491] Core dumps appear when the load increases
Date Fri, 30 Oct 2015 14:39:26 GMT
https://bz.apache.org/bugzilla/show_bug.cgi?id=58491

--- Comment #5 from Sylvain Goulmy <sygoulmy@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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