[Bug 54650] httpd-2.2.21 Program received signal SIGPIPE, Broken pipe.

[bu...@apache.org]

https://issues.apache.org/bugzilla/show_bug.cgi?id=54650

--- Comment #1 from Luca Gervasi <ap...@ashetic.net> ---
Same problem here...

This is the gdb run and stack trace:

[Switching to Thread 0x7fffd77eb700 (LWP 26768)]
0x00007ffff65c4c47 in __libc_writev (fd=<value optimized out>, vector=<value
optimized out>, 
    count=<value optimized out>) at ../sysdeps/unix/sysv/linux/writev.c:56
56          result = INLINE_SYSCALL (writev, 3, fd, CHECK_N (vector, count),
count);

#0  0x00007ffff65c4c47 in __libc_writev (fd=<value optimized out>,
vector=<value optimized out>, 
    count=<value optimized out>) at ../sysdeps/unix/sysv/linux/writev.c:56
#1  0x00007ffff6ab1726 in apr_socket_sendv (sock=0x7fffd0006cd8,
vec=0x7fffd81eb870, nvec=4, len=0x7fffd81eb678)
    at network_io/unix/sendrecv.c:205
#2  0x00007ffff7fd3ab3 in writev_it_all (s=0x7fffd0006cd8, vec=0x7fffd81eb870,
nvec=4, len=16008, 
    nbytes=0x7fffd81eb9a0) at
/usr/src/debug/httpd-2.2.15/server/core_filters.c:321
#3  0x00007ffff7fd4a65 in ap_core_output_filter (f=0x7fffd00076a0,
b=0x7fffbc0e7f78)
    at /usr/src/debug/httpd-2.2.15/server/core_filters.c:869
#4  0x00007ffff7fe69c4 in ap_http_chunk_filter (f=0x7fffbc0e8300,
b=0x7fffbc0e7f78)
    at /usr/src/debug/httpd-2.2.15/modules/http/chunk_filter.c:189
#5  0x00007ffff7fc9a00 in ap_content_length_filter (f=0x7fffbc003e88,
b=0x7fffbc0e7f78)
    at /usr/src/debug/httpd-2.2.15/server/protocol.c:1357
#6  0x00007ffff5c5c623 in send_parsed_content (f=0x7fffbc0141a8,
b=0x7fffbc00da30)
    at /usr/src/debug/httpd-2.2.15/modules/filters/mod_include.c:3190
#7  includes_filter (f=0x7fffbc0141a8, b=0x7fffbc00da30)
    at /usr/src/debug/httpd-2.2.15/modules/filters/mod_include.c:3671
#8  0x00007ffff7fce63c in default_handler (r=0x7fffbc002978) at
/usr/src/debug/httpd-2.2.15/server/core.c:3766
#9  0x00007ffff7fd5530 in ap_run_handler (r=0x7fffbc002978) at
/usr/src/debug/httpd-2.2.15/server/config.c:158
#10 0x00007ffff7fd8dee in ap_invoke_handler (r=0x7fffbc002978) at
/usr/src/debug/httpd-2.2.15/server/config.c:376
#11 0x00007ffff7fe41f0 in ap_process_request (r=0x7fffbc002978)
    at /usr/src/debug/httpd-2.2.15/modules/http/http_request.c:282
#12 0x00007ffff7fe1068 in ap_process_http_connection (c=0x7fffd0006ef0)
    at /usr/src/debug/httpd-2.2.15/modules/http/http_core.c:190
#13 0x00007ffff7fdd038 in ap_run_process_connection (c=0x7fffd0006ef0)
    at /usr/src/debug/httpd-2.2.15/server/connection.c:43
#14 0x00007ffff7fe9f02 in process_socket (thd=0x7ffff86aca88, dummy=<value
optimized out>)
    at /usr/src/debug/httpd-2.2.15/server/mpm/worker/worker.c:544
#15 worker_thread (thd=0x7ffff86aca88, dummy=<value optimized out>)
    at /usr/src/debug/httpd-2.2.15/server/mpm/worker/worker.c:894
#16 0x00007ffff687f9d1 in start_thread (arg=0x7fffd81ec700) at
pthread_create.c:301
#17 0x00007ffff65ccb5d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:115

It happens pretty often on a moderately high load server (around 2k
requests/s).

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