$ ab -n 400 -c 25 'http://www.nationstates.eve/nation=jenny'
This is ApacheBench, Version 2.3 <$Revision: 655654 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking www.nationstates.eve (be patient)
Completed 100 requests
Completed 200 requests
Completed 300 requests
apr_poll: The timeout specified has expired (70007)
Total of 393 requests completed

$ ps -C apache2 -o pid:8,wchan:10,rss:10,size:10,user,cmd
     PID WCHAN             RSS       SIZE USER     CMD
   10915 poll_sched      67868      63044 root     /usr/sbin/apache2 -k start
   10919 wait_for_p      63068      62796 www-data /usr/sbin/apache2 -k start
   10920 poll_sched      63184      62780 www-data /usr/sbin/apache2 -k start
   11447 futex_wait      97660     497280 www-data /usr/sbin/apache2 -k start
   12070 pipe_wait       96544     436220 www-data /usr/sbin/apache2 -k start
   12074 pipe_wait       96424     380220 www-data /usr/sbin/apache2 -k start
   12125 pipe_wait       96388     426568 www-data /usr/sbin/apache2 -k start

$ sudo strace -p 11447
Process 11447 attached - interrupt to quit
futex(0x7ff696b419d0, FUTEX_WAIT, 11452, NULL

$ sudo kill -11 11447
$ sudo strace -p 11447
Process 11447 attached - interrupt to quit
futex(0x7ff696b419d0, FUTEX_WAIT, 11452, NULL) = ? ERESTARTSYS (To be restarted)
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
chdir("/tmp/apache2-gdb-dump")          = 0
rt_sigaction(SIGSEGV, {SIG_DFL, [], SA_RESTORER|SA_INTERRUPT, 0x7ff6a02dd060}, {SIG_DFL, [], SA_RESTORER|SA_RESETHAND, 0x7ff6a02dd060}, 8) = 0
kill(11447, SIGSEGV <unfinished ...>
+++ killed by SIGSEGV (core dumped) +++

$ ll -h /tmp/apache2-gdb-dump/
total 95M
-rw------- 1 www-data www-data 312M 2011-11-14 14:29 core

$ sudo gdb /usr/sbin/apache2 /tmp/apache2-gdb-dump/core
GNU gdb (Ubuntu/Linaro 7.3-0ubuntu2) 7.3-2011.08
Copyright (C) 2011 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
For bug reporting instructions, please see:
<http://bugs.launchpad.net/gdb-linaro/>...
Reading symbols from /usr/sbin/apache2...done.
[New LWP 11452]
[New LWP 11456]
[New LWP 11461]
[New LWP 11462]
[New LWP 11465]
[New LWP 11467]
[New LWP 11460]
[New LWP 11447]

warning: Can't read pathname for load map: Input/output error.
[Thread debugging using libthread_db enabled]
Core was generated by `/usr/sbin/apache2 -k start'.
Program terminated with signal 11, Segmentation fault.
#0  pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
162	../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S: No such file or directory.
	in ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S
(gdb)
(gdb) thread apply all bt full

Thread 8 (Thread 0x7ff6a0d6e760 (LWP 11447)):
#0  0x00007ff69ff64687 in kill () at ../sysdeps/unix/syscall-template.S:82
No locals.
#1  <signal handler called>
No symbol table info available.
#2  0x00007ff6a02d61f8 in pthread_join (threadid=140697067067136, thread_return=0x7fff3993a170)
    at pthread_join.c:89
        _tid = <optimized out>
        _buffer = {__routine = 0x7ff6a02d6120 <cleanup>, __arg = 0x7ff696b41d28, __canceltype = 0,
          __prev = 0x0}
        oldtype = 0
        pd = 0x7ff696b41700
        self = 0x7ff6a0d6e760
        result = 0
#3  0x00007ff6a051809e in apr_thread_join () from /usr/lib/libapr-1.so.0
No symbol table info available.
#4  0x00007ff6a0dd0aba in join_workers (listener=0x7ff6a0c47ac0, threads=0x7ff6a48da1c0)
    at /build/buildd/apache2-2.2.20/server/mpm/worker/worker.c:1104
        worker_os_thread = 0x7ff6a0c47668
        i = 1
        rv = <optimized out>
        thread_rv = 0
#5  0x00007ff6a0dd0de9 in child_main (child_num_arg=1)
    at /build/buildd/apache2-2.2.20/server/mpm/worker/worker.c:1287
        threads = 0x7ff6a48da1c0
        rv = <optimized out>
        ts = 0x7ff6a0c47128
        thread_attr = 0x7ff6a0c47148
        start_thread_id = 0x7ff6a0c471a8
#6  0x00007ff6a0dfc9de in make_child (s=0x7ff6a0d927f8, slot=1)
    at /build/buildd/apache2-2.2.20/server/mpm/worker/worker.c:1341
        pid = 0
#7  0x00007ff6a0dfd2b5 in perform_idle_server_maintenance ()
    at /build/buildd/apache2-2.2.20/server/mpm/worker/worker.c:1560
        j = <optimized out>
        free_slots = {1, 2, 0, 0, 3, 32758, -1660841411, 32758, -1658580800, 32758, -1605342990,
          32758, -1566536512, 32758, -1596333920, 32758, -1596566024, 32758, -1596566024, 0,
          965976880, 32767, -1605340513, 32758, 0, 0, -1593143280, 32758, 0, 0, 0, 0}
        total_non_dead = <optimized out>
        active_thread_count = <optimized out>
        idle_thread_count = <optimized out>
        free_length = <optimized out>
        i = <optimized out>
        ps = <optimized out>
        totally_free_length = <optimized out>
        last_non_dead = <optimized out>
#8  server_main_loop (remaining_children_to_start=0)
    at /build/buildd/apache2-2.2.20/server/mpm/worker/worker.c:1663
---Type <return> to continue, or q <return> to quit---
        status = 0
        pid = {pid = -1, in = 0x200000000, out = 0x7ff6a0d5e028, err = 0x7ff6a10a9010}
        i = <optimized out>
        child_slot = <optimized out>
        exitwhy = APR_PROC_EXIT
        processed_status = <optimized out>
#9  ap_mpm_run (_pconf=<optimized out>, plog=<optimized out>, s=<optimized out>)
    at /build/buildd/apache2-2.2.20/server/mpm/worker/worker.c:1765
        remaining_children_to_start = 0
        rv = <optimized out>
#10 0x00007ff6a0dd1a7e in main (argc=3, argv=0x7fff3993a558)
    at /build/buildd/apache2-2.2.20/server/main.c:741
        c = 0 '\000'
        configtestonly = <optimized out>
        confname = 0x7ff6a0dff653 "apache2.conf"
        def_server_root = 0x7ff6a0dff646 "/etc/apache2"
        temp_error_log = 0x0
        error = <optimized out>
        process = 0x7ff6a0d9a118
        server_conf = 0x7ff6a0d927f8
        pglobal = <optimized out>
        pconf = 0x7ff6a0d98028
        plog = 0x7ff6a0d5e028
        ptemp = 0x7ff6a0d90028
        pcommands = 0x7ff6a0d96028
        opt = 0x7ff6a0d96118
        rv = 0
        mod = <optimized out>
        optarg = 0x2cb4304e <Address 0x2cb4304e out of bounds>
        signal_server = <optimized out>

Thread 7 (Thread 0x7ff692b39700 (LWP 11460)):
#0  pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
No locals.
#1  0x00007ff69d0198e9 in modperl_tipool_pop () from /usr/lib/apache2/modules/mod_perl.so
No symbol table info available.
#2  0x00007ff69d018937 in modperl_interp_get () from /usr/lib/apache2/modules/mod_perl.so
No symbol table info available.
#3  0x00007ff69d018fee in modperl_interp_select () from /usr/lib/apache2/modules/mod_perl.so
No symbol table info available.
#4  0x00007ff69d01dba8 in modperl_callback_run_handlers () from /usr/lib/apache2/modules/mod_perl.so
No symbol table info available.
#5  0x00007ff69d01e3df in modperl_callback_per_srv () from /usr/lib/apache2/modules/mod_perl.so
No symbol table info available.
#6  0x00007ff6a0dd94a0 in ap_run_post_read_request (r=0x7ff68a0e70a0)
    at /build/buildd/apache2-2.2.20/server/protocol.c:1714
        pHook = <optimized out>
        n = <optimized out>
---Type <return> to continue, or q <return> to quit---
        rv = <optimized out>
#7  0x00007ff6a0dda028 in ap_read_request (conn=0x7ff6a0baa2c8)
    at /build/buildd/apache2-2.2.20/server/protocol.c:1044
        p = 0x7ff68a0e7028
        expect = <optimized out>
        access_status = <optimized out>
        tmp_bb = 0x7ff68a0e87f8
        csd = 0x7ff6a0baa0b0
        cur_timeout = 300000000
#8  0x00007ff6a0df3480 in ap_process_http_connection (c=0x7ff6a0baa2c8)
    at /build/buildd/apache2-2.2.20/modules/http/http_core.c:183
        r = <optimized out>
        csd = 0x0
#9  0x00007ff6a0ded428 in ap_run_process_connection (c=0x7ff6a0baa2c8)
    at /build/buildd/apache2-2.2.20/server/connection.c:43
        pHook = <optimized out>
        n = <optimized out>
        rv = <optimized out>
#10 0x00007ff6a0dfc80c in process_socket (bucket_alloc=<optimized out>, my_thread_num=9,
    my_child_num=1, sock=0x7ff6a0baa0b0, p=<optimized out>)
    at /build/buildd/apache2-2.2.20/server/mpm/worker/worker.c:544
        current_conn = 0x7ff6a0baa2c8
        conn_id = <optimized out>
        csd = 39
        sbh = 0x7ff6a0baa2c0
#11 worker_thread (thd=0x7ff6a0c477c0, dummy=<optimized out>)
    at /build/buildd/apache2-2.2.20/server/mpm/worker/worker.c:894
        ti = <optimized out>
        process_slot = 1
        thread_slot = 9
        csd = 0x7ff6a0baa0b0
        bucket_alloc = <optimized out>
        last_ptrans = <optimized out>
        ptrans = 0x7ff6a0baa028
        rv = <optimized out>
        is_idle = 0
#12 0x00007ff6a0517eb3 in ?? () from /usr/lib/libapr-1.so.0
No symbol table info available.
#13 0x00007ff6a02d4efc in start_thread (arg=0x7ff692b39700) at pthread_create.c:304
        __res = <optimized out>
        pd = 0x7ff692b39700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -290490582626846067, 140697235910992,
                140696999926208, 0, 3, 295791982675901069, 295751036598631053}, mask_was_saved = 0}},
          priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        robust = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
---Type <return> to continue, or q <return> to quit---
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#14 0x00007ff6a000f89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#15 0x0000000000000000 in ?? ()
No symbol table info available.

Thread 6 (Thread 0x7ff68f332700 (LWP 11467)):
#0  pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
No locals.
#1  0x00007ff69d0198e9 in modperl_tipool_pop () from /usr/lib/apache2/modules/mod_perl.so
No symbol table info available.
#2  0x00007ff69d018937 in modperl_interp_get () from /usr/lib/apache2/modules/mod_perl.so
No symbol table info available.
#3  0x00007ff69d018fee in modperl_interp_select () from /usr/lib/apache2/modules/mod_perl.so
No symbol table info available.
#4  0x00007ff69d01dba8 in modperl_callback_run_handlers () from /usr/lib/apache2/modules/mod_perl.so
No symbol table info available.
#5  0x00007ff69d01e3df in modperl_callback_per_srv () from /usr/lib/apache2/modules/mod_perl.so
No symbol table info available.
#6  0x00007ff6a0dd94a0 in ap_run_post_read_request (r=0x7ff68a0cb0a0)
    at /build/buildd/apache2-2.2.20/server/protocol.c:1714
        pHook = <optimized out>
        n = <optimized out>
        rv = <optimized out>
#7  0x00007ff6a0dda028 in ap_read_request (conn=0x7ff6a0bb42b8)
    at /build/buildd/apache2-2.2.20/server/protocol.c:1044
        p = 0x7ff68a0cb028
        expect = <optimized out>
        access_status = <optimized out>
        tmp_bb = 0x7ff68a0cc7f8
        csd = 0x7ff6a0bb40a0
        cur_timeout = 300000000
#8  0x00007ff6a0df3480 in ap_process_http_connection (c=0x7ff6a0bb42b8)
    at /build/buildd/apache2-2.2.20/modules/http/http_core.c:183
        r = <optimized out>
        csd = 0x0
#9  0x00007ff6a0ded428 in ap_run_process_connection (c=0x7ff6a0bb42b8)
    at /build/buildd/apache2-2.2.20/server/connection.c:43
        pHook = <optimized out>
        n = <optimized out>
        rv = <optimized out>
#10 0x00007ff6a0dfc80c in process_socket (bucket_alloc=<optimized out>, my_thread_num=16,
    my_child_num=1, sock=0x7ff6a0bb40a0, p=<optimized out>)
    at /build/buildd/apache2-2.2.20/server/mpm/worker/worker.c:544
        current_conn = 0x7ff6a0bb42b8
        conn_id = <optimized out>
        csd = 29
---Type <return> to continue, or q <return> to quit---
        sbh = 0x7ff6a0bb42b0
#11 worker_thread (thd=0x7ff6a0c47910, dummy=<optimized out>)
    at /build/buildd/apache2-2.2.20/server/mpm/worker/worker.c:894
        ti = <optimized out>
        process_slot = 1
        thread_slot = 16
        csd = 0x7ff6a0bb40a0
        bucket_alloc = <optimized out>
        last_ptrans = <optimized out>
        ptrans = 0x7ff6a0bb4028
        rv = <optimized out>
        is_idle = 0
#12 0x00007ff6a0517eb3 in ?? () from /usr/lib/libapr-1.so.0
No symbol table info available.
#13 0x00007ff6a02d4efc in start_thread (arg=0x7ff68f332700) at pthread_create.c:304
        __res = <optimized out>
        pd = 0x7ff68f332700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -290490582626846067, 140697235910992,
                140696941177280, 0, 3, 295801873448712845, 295751036598631053}, mask_was_saved = 0}},
          priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        robust = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#14 0x00007ff6a000f89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#15 0x0000000000000000 in ?? ()
No symbol table info available.

Thread 5 (Thread 0x7ff690334700 (LWP 11465)):
#0  pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
No locals.
#1  0x00007ff69d0198e9 in modperl_tipool_pop () from /usr/lib/apache2/modules/mod_perl.so
No symbol table info available.
#2  0x00007ff69d018937 in modperl_interp_get () from /usr/lib/apache2/modules/mod_perl.so
No symbol table info available.
#3  0x00007ff69d018fee in modperl_interp_select () from /usr/lib/apache2/modules/mod_perl.so
No symbol table info available.
#4  0x00007ff69d01dba8 in modperl_callback_run_handlers () from /usr/lib/apache2/modules/mod_perl.so
No symbol table info available.
#5  0x00007ff69d01e3df in modperl_callback_per_srv () from /usr/lib/apache2/modules/mod_perl.so
No symbol table info available.
#6  0x00007ff6a0dd94a0 in ap_run_post_read_request (r=0x7ff68a0d10a0)
    at /build/buildd/apache2-2.2.20/server/protocol.c:1714
        pHook = <optimized out>
---Type <return> to continue, or q <return> to quit---
        n = <optimized out>
        rv = <optimized out>
#7  0x00007ff6a0dda028 in ap_read_request (conn=0x7ff6a0bb22b8)
    at /build/buildd/apache2-2.2.20/server/protocol.c:1044
        p = 0x7ff68a0d1028
        expect = <optimized out>
        access_status = <optimized out>
        tmp_bb = 0x7ff68a0d27f8
        csd = 0x7ff6a0bb20a0
        cur_timeout = 300000000
#8  0x00007ff6a0df3480 in ap_process_http_connection (c=0x7ff6a0bb22b8)
    at /build/buildd/apache2-2.2.20/modules/http/http_core.c:183
        r = <optimized out>
        csd = 0x0
#9  0x00007ff6a0ded428 in ap_run_process_connection (c=0x7ff6a0bb22b8)
    at /build/buildd/apache2-2.2.20/server/connection.c:43
        pHook = <optimized out>
        n = <optimized out>
        rv = <optimized out>
#10 0x00007ff6a0dfc80c in process_socket (bucket_alloc=<optimized out>, my_thread_num=14,
    my_child_num=1, sock=0x7ff6a0bb20a0, p=<optimized out>)
    at /build/buildd/apache2-2.2.20/server/mpm/worker/worker.c:544
        current_conn = 0x7ff6a0bb22b8
        conn_id = <optimized out>
        csd = 30
        sbh = 0x7ff6a0bb22b0
#11 worker_thread (thd=0x7ff6a0c478b0, dummy=<optimized out>)
    at /build/buildd/apache2-2.2.20/server/mpm/worker/worker.c:894
        ti = <optimized out>
        process_slot = 1
        thread_slot = 14
        csd = 0x7ff6a0bb20a0
        bucket_alloc = <optimized out>
        last_ptrans = <optimized out>
        ptrans = 0x7ff6a0bb2028
        rv = <optimized out>
        is_idle = 0
#12 0x00007ff6a0517eb3 in ?? () from /usr/lib/libapr-1.so.0
No symbol table info available.
#13 0x00007ff6a02d4efc in start_thread (arg=0x7ff690334700) at pthread_create.c:304
        __res = <optimized out>
        pd = 0x7ff690334700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -290490582626846067, 140697235910992,
                140696957962688, 0, 3, 295786481359665805, 295751036598631053}, mask_was_saved = 0}},
          priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        robust = <optimized out>
        pagesize_m1 = <optimized out>
---Type <return> to continue, or q <return> to quit---
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#14 0x00007ff6a000f89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#15 0x0000000000000000 in ?? ()
No symbol table info available.

Thread 4 (Thread 0x7ff691b37700 (LWP 11462)):
#0  pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
No locals.
#1  0x00007ff69d0198e9 in modperl_tipool_pop () from /usr/lib/apache2/modules/mod_perl.so
No symbol table info available.
#2  0x00007ff69d018937 in modperl_interp_get () from /usr/lib/apache2/modules/mod_perl.so
No symbol table info available.
#3  0x00007ff69d018fee in modperl_interp_select () from /usr/lib/apache2/modules/mod_perl.so
No symbol table info available.
#4  0x00007ff69d01dba8 in modperl_callback_run_handlers () from /usr/lib/apache2/modules/mod_perl.so
No symbol table info available.
#5  0x00007ff69d01e3df in modperl_callback_per_srv () from /usr/lib/apache2/modules/mod_perl.so
No symbol table info available.
#6  0x00007ff6a0dd94a0 in ap_run_post_read_request (r=0x7ff68a0ed0a0)
    at /build/buildd/apache2-2.2.20/server/protocol.c:1714
        pHook = <optimized out>
        n = <optimized out>
        rv = <optimized out>
#7  0x00007ff6a0dda028 in ap_read_request (conn=0x7ff6a0ba82c8)
    at /build/buildd/apache2-2.2.20/server/protocol.c:1044
        p = 0x7ff68a0ed028
        expect = <optimized out>
        access_status = <optimized out>
        tmp_bb = 0x7ff68a0ee7f8
        csd = 0x7ff6a0ba80b0
        cur_timeout = 300000000
#8  0x00007ff6a0df3480 in ap_process_http_connection (c=0x7ff6a0ba82c8)
    at /build/buildd/apache2-2.2.20/modules/http/http_core.c:183
        r = <optimized out>
        csd = 0x0
#9  0x00007ff6a0ded428 in ap_run_process_connection (c=0x7ff6a0ba82c8)
    at /build/buildd/apache2-2.2.20/server/connection.c:43
        pHook = <optimized out>
        n = <optimized out>
        rv = <optimized out>
#10 0x00007ff6a0dfc80c in process_socket (bucket_alloc=<optimized out>, my_thread_num=11,
    my_child_num=1, sock=0x7ff6a0ba80b0, p=<optimized out>)
    at /build/buildd/apache2-2.2.20/server/mpm/worker/worker.c:544
        current_conn = 0x7ff6a0ba82c8
        conn_id = <optimized out>
---Type <return> to continue, or q <return> to quit---
        csd = 35
        sbh = 0x7ff6a0ba82c0
#11 worker_thread (thd=0x7ff6a0c47820, dummy=<optimized out>)
    at /build/buildd/apache2-2.2.20/server/mpm/worker/worker.c:894
        ti = <optimized out>
        process_slot = 1
        thread_slot = 11
        csd = 0x7ff6a0ba80b0
        bucket_alloc = <optimized out>
        last_ptrans = <optimized out>
        ptrans = 0x7ff6a0ba8028
        rv = <optimized out>
        is_idle = 0
#12 0x00007ff6a0517eb3 in ?? () from /usr/lib/libapr-1.so.0
No symbol table info available.
#13 0x00007ff6a02d4efc in start_thread (arg=0x7ff691b37700) at pthread_create.c:304
        __res = <optimized out>
        pd = 0x7ff691b37700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -290490582626846067, 140697235910992,
                140696983140800, 0, 3, 295789778283936397, 295751036598631053}, mask_was_saved = 0}},
          priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        robust = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#14 0x00007ff6a000f89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#15 0x0000000000000000 in ?? ()
No symbol table info available.

Thread 3 (Thread 0x7ff692338700 (LWP 11461)):
#0  pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
No locals.
#1  0x00007ff69d0198e9 in modperl_tipool_pop () from /usr/lib/apache2/modules/mod_perl.so
No symbol table info available.
#2  0x00007ff69d018937 in modperl_interp_get () from /usr/lib/apache2/modules/mod_perl.so
No symbol table info available.
#3  0x00007ff69d018fee in modperl_interp_select () from /usr/lib/apache2/modules/mod_perl.so
No symbol table info available.
#4  0x00007ff69d01dba8 in modperl_callback_run_handlers () from /usr/lib/apache2/modules/mod_perl.so
No symbol table info available.
#5  0x00007ff69d01e3df in modperl_callback_per_srv () from /usr/lib/apache2/modules/mod_perl.so
No symbol table info available.
#6  0x00007ff6a0dd94a0 in ap_run_post_read_request (r=0x7ff68a0e10a0)
    at /build/buildd/apache2-2.2.20/server/protocol.c:1714
---Type <return> to continue, or q <return> to quit---
        pHook = <optimized out>
        n = <optimized out>
        rv = <optimized out>
#7  0x00007ff6a0dda028 in ap_read_request (conn=0x7ff6a0bac2c8)
    at /build/buildd/apache2-2.2.20/server/protocol.c:1044
        p = 0x7ff68a0e1028
        expect = <optimized out>
        access_status = <optimized out>
        tmp_bb = 0x7ff68a0e27f8
        csd = 0x7ff6a0bac0b0
        cur_timeout = 300000000
#8  0x00007ff6a0df3480 in ap_process_http_connection (c=0x7ff6a0bac2c8)
    at /build/buildd/apache2-2.2.20/modules/http/http_core.c:183
        r = <optimized out>
        csd = 0x0
#9  0x00007ff6a0ded428 in ap_run_process_connection (c=0x7ff6a0bac2c8)
    at /build/buildd/apache2-2.2.20/server/connection.c:43
        pHook = <optimized out>
        n = <optimized out>
        rv = <optimized out>
#10 0x00007ff6a0dfc80c in process_socket (bucket_alloc=<optimized out>, my_thread_num=10,
    my_child_num=1, sock=0x7ff6a0bac0b0, p=<optimized out>)
    at /build/buildd/apache2-2.2.20/server/mpm/worker/worker.c:544
        current_conn = 0x7ff6a0bac2c8
        conn_id = <optimized out>
        csd = 34
        sbh = 0x7ff6a0bac2c0
#11 worker_thread (thd=0x7ff6a0c477f0, dummy=<optimized out>)
    at /build/buildd/apache2-2.2.20/server/mpm/worker/worker.c:894
        ti = <optimized out>
        process_slot = 1
        thread_slot = 10
        csd = 0x7ff6a0bac0b0
        bucket_alloc = <optimized out>
        last_ptrans = <optimized out>
        ptrans = 0x7ff6a0bac028
        rv = <optimized out>
        is_idle = 0
#12 0x00007ff6a0517eb3 in ?? () from /usr/lib/libapr-1.so.0
No symbol table info available.
#13 0x00007ff6a02d4efc in start_thread (arg=0x7ff692338700) at pthread_create.c:304
        __res = <optimized out>
        pd = 0x7ff692338700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -290490582626846067, 140697235910992,
                140696991533504, 0, 3, 295790877258693261, 295751036598631053}, mask_was_saved = 0}},
          priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        robust = <optimized out>
---Type <return> to continue, or q <return> to quit---
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#14 0x00007ff6a000f89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#15 0x0000000000000000 in ?? ()
No symbol table info available.

Thread 2 (Thread 0x7ff694b3d700 (LWP 11456)):
#0  pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
No locals.
#1  0x00007ff69d0198e9 in modperl_tipool_pop () from /usr/lib/apache2/modules/mod_perl.so
No symbol table info available.
#2  0x00007ff69d018937 in modperl_interp_get () from /usr/lib/apache2/modules/mod_perl.so
No symbol table info available.
#3  0x00007ff69d018fee in modperl_interp_select () from /usr/lib/apache2/modules/mod_perl.so
No symbol table info available.
#4  0x00007ff69d01dba8 in modperl_callback_run_handlers () from /usr/lib/apache2/modules/mod_perl.so
No symbol table info available.
#5  0x00007ff69d01e3df in modperl_callback_per_srv () from /usr/lib/apache2/modules/mod_perl.so
No symbol table info available.
#6  0x00007ff6a0dd94a0 in ap_run_post_read_request (r=0x7ff68a0f50a0)
    at /build/buildd/apache2-2.2.20/server/protocol.c:1714
        pHook = <optimized out>
        n = <optimized out>
        rv = <optimized out>
#7  0x00007ff6a0dda028 in ap_read_request (conn=0x7ff6a0ba42c8)
    at /build/buildd/apache2-2.2.20/server/protocol.c:1044
        p = 0x7ff68a0f5028
        expect = <optimized out>
        access_status = <optimized out>
        tmp_bb = 0x7ff68a0f67f8
        csd = 0x7ff6a0ba40b0
        cur_timeout = 300000000
#8  0x00007ff6a0df3480 in ap_process_http_connection (c=0x7ff6a0ba42c8)
    at /build/buildd/apache2-2.2.20/modules/http/http_core.c:183
        r = <optimized out>
        csd = 0x0
#9  0x00007ff6a0ded428 in ap_run_process_connection (c=0x7ff6a0ba42c8)
    at /build/buildd/apache2-2.2.20/server/connection.c:43
        pHook = <optimized out>
        n = <optimized out>
        rv = <optimized out>
#10 0x00007ff6a0dfc80c in process_socket (bucket_alloc=<optimized out>, my_thread_num=5,
    my_child_num=1, sock=0x7ff6a0ba40b0, p=<optimized out>)
    at /build/buildd/apache2-2.2.20/server/mpm/worker/worker.c:544
        current_conn = 0x7ff6a0ba42c8
---Type <return> to continue, or q <return> to quit---
        conn_id = <optimized out>
        csd = 33
        sbh = 0x7ff6a0ba42c0
#11 worker_thread (thd=0x7ff6a0c47700, dummy=<optimized out>)
    at /build/buildd/apache2-2.2.20/server/mpm/worker/worker.c:894
        ti = <optimized out>
        process_slot = 1
        thread_slot = 5
        csd = 0x7ff6a0ba40b0
        bucket_alloc = <optimized out>
        last_ptrans = <optimized out>
        ptrans = 0x7ff6a0ba4028
        rv = <optimized out>
        is_idle = 0
#12 0x00007ff6a0517eb3 in ?? () from /usr/lib/libapr-1.so.0
No symbol table info available.
#13 0x00007ff6a02d4efc in start_thread (arg=0x7ff694b3d700) at pthread_create.c:304
        __res = <optimized out>
        pd = 0x7ff694b3d700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -290490582626846067, 140697235910992,
                140697033497024, 0, 3, 295778786388884109, 295751036598631053}, mask_was_saved = 0}},
          priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        robust = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#14 0x00007ff6a000f89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#15 0x0000000000000000 in ?? ()
No symbol table info available.

Thread 1 (Thread 0x7ff696b41700 (LWP 11452)):
#0  pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
No locals.
#1  0x00007ff69d0198e9 in modperl_tipool_pop () from /usr/lib/apache2/modules/mod_perl.so
No symbol table info available.
#2  0x00007ff69d018937 in modperl_interp_get () from /usr/lib/apache2/modules/mod_perl.so
No symbol table info available.
#3  0x00007ff69d018fee in modperl_interp_select () from /usr/lib/apache2/modules/mod_perl.so
No symbol table info available.
#4  0x00007ff69d01dba8 in modperl_callback_run_handlers () from /usr/lib/apache2/modules/mod_perl.so
No symbol table info available.
#5  0x00007ff69d01e3df in modperl_callback_per_srv () from /usr/lib/apache2/modules/mod_perl.so
No symbol table info available.
#6  0x00007ff6a0dd94a0 in ap_run_post_read_request (r=0x7ff68a0730a0)
---Type <return> to continue, or q <return> to quit---
    at /build/buildd/apache2-2.2.20/server/protocol.c:1714
        pHook = <optimized out>
        n = <optimized out>
        rv = <optimized out>
#7  0x00007ff6a0dda028 in ap_read_request (conn=0x7ff68a0852b8)
    at /build/buildd/apache2-2.2.20/server/protocol.c:1044
        p = 0x7ff68a073028
        expect = <optimized out>
        access_status = <optimized out>
        tmp_bb = 0x7ff68a0747f8
        csd = 0x7ff68a0850a0
        cur_timeout = 300000000
#8  0x00007ff6a0df3480 in ap_process_http_connection (c=0x7ff68a0852b8)
    at /build/buildd/apache2-2.2.20/modules/http/http_core.c:183
        r = <optimized out>
        csd = 0x0
#9  0x00007ff6a0ded428 in ap_run_process_connection (c=0x7ff68a0852b8)
    at /build/buildd/apache2-2.2.20/server/connection.c:43
        pHook = <optimized out>
        n = <optimized out>
        rv = <optimized out>
#10 0x00007ff6a0dfc80c in process_socket (bucket_alloc=<optimized out>, my_thread_num=1,
    my_child_num=1, sock=0x7ff68a0850a0, p=<optimized out>)
    at /build/buildd/apache2-2.2.20/server/mpm/worker/worker.c:544
        current_conn = 0x7ff68a0852b8
        conn_id = <optimized out>
        csd = 42
        sbh = 0x7ff68a0852b0
#11 worker_thread (thd=0x7ff6a0c47640, dummy=<optimized out>)
    at /build/buildd/apache2-2.2.20/server/mpm/worker/worker.c:894
        ti = <optimized out>
        process_slot = 1
        thread_slot = 1
        csd = 0x7ff68a0850a0
        bucket_alloc = <optimized out>
        last_ptrans = <optimized out>
        ptrans = 0x7ff68a085028
        rv = <optimized out>
        is_idle = 0
#12 0x00007ff6a0517eb3 in ?? () from /usr/lib/libapr-1.so.0
No symbol table info available.
#13 0x00007ff6a02d4efc in start_thread (arg=0x7ff696b41700) at pthread_create.c:304
        __res = <optimized out>
        pd = 0x7ff696b41700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -290490582626846067, 140697235910992,
                140697067067840, 0, 3, 295783139338238605, 295751036598631053}, mask_was_saved = 0}},
          priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
---Type <return> to continue, or q <return> to quit---
        robust = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#14 0x00007ff6a000f89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#15 0x0000000000000000 in ?? ()
No symbol table info available.
(gdb)