[Bug 56795] New: Apache 2.4.10 Program received signal SIGPIPE, Broken pipe.

[bu...@apache.org]

https://issues.apache.org/bugzilla/show_bug.cgi?id=56795

            Bug ID: 56795
           Summary: Apache 2.4.10 Program received signal SIGPIPE, Broken
                    pipe.
           Product: Apache httpd-2
           Version: 2.4.10
          Hardware: All
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: mpm_worker
          Assignee: bugs@httpd.apache.org
          Reporter: manas_roni@yahoo.co.in

# /usr/local/apache/bin/httpd -V
Server version: Apache/2.4.10 (Unix)
Server built:   Jul 31 2014 14:23:52
Server's Module Magic Number: 20120211:36
Server loaded:  APR 1.5.1, APR-UTIL 1.5.3
Compiled using: APR 1.5.1, APR-UTIL 1.5.3
Architecture:   64-bit
Server MPM:     prefork
  threaded:     no
    forked:     yes (variable process count)
Server compiled with....
 -D APR_HAS_SENDFILE
 -D APR_HAS_MMAP
 -D APR_HAVE_IPV6 (IPv4-mapped addresses enabled)
 -D APR_USE_SYSVSEM_SERIALIZE
 -D APR_USE_PTHREAD_SERIALIZE
 -D SINGLE_LISTEN_UNSERIALIZED_ACCEPT
 -D APR_HAS_OTHER_CHILD
 -D AP_HAVE_RELIABLE_PIPED_LOGS
 -D DYNAMIC_MODULE_LIMIT=256
 -D HTTPD_ROOT="/usr/local/apache"
 -D SUEXEC_BIN="/usr/local/apache/bin/suexec"
 -D DEFAULT_PIDLOG="logs/httpd.pid"
 -D DEFAULT_SCOREBOARD="logs/apache_runtime_status"
 -D DEFAULT_ERRORLOG="logs/error_log"
 -D AP_TYPES_CONFIG_FILE="conf/mime.types"
 -D SERVER_CONFIG_FILE="conf/httpd.conf"

(gdb) run -X
Starting program: /usr/local/apache/bin/httpd -X
[Thread debugging using libthread_db enabled]

Program received signal SIGPIPE, Broken pipe.
0x00000030d46e0b2b in writev () from /lib64/libc.so.6
Missing separate debuginfos, use: debuginfo-install
cyrus-sasl-lib-2.1.23-13.el6_3.1.x86_64 freetype-2.3.11-6.el6_2.9.x86_64
keyutils-libs-1.4-4.el6.x86_64 krb5-libs-1.10.3-10.el6.x86_64
libcom_err-1.41.12-14.el6.x86_64 libcurl-7.19.7-35.el6.x86_64
libgcrypt-1.4.5-9.el6_2.2.x86_64 libgpg-error-1.7-4.el6.x86_64
libidn-1.18-2.el6.x86_64 libjpeg-turbo-1.2.1-1.el6.x86_64
libpng-1.2.49-1.el6_2.x86_64 libselinux-2.0.94-5.3.el6.x86_64
libssh2-1.4.2-1.el6.x86_64 libxml2-2.7.6-8.el6_3.4.x86_64
libxslt-1.1.26-2.el6_3.1.x86_64 nspr-4.9.2-1.el6.x86_64
nss-3.14.0.0-12.el6.x86_64 nss-util-3.14.0.0-2.el6.x86_64
openldap-2.4.23-31.el6.x86_64 openssl-1.0.1e-16.el6_5.14.x86_64
(gdb) where
#0  0x00000030d46e0b2b in writev () from /lib64/libc.so.6
#1  0x00007ffff7bb2266 in apr_socket_sendv (sock=0xb3c620, vec=0x7fffffffded0,
nvec=2, len=0x7fffffffde50) at network_io/unix/sendrecv.c:212
#2  0x0000000000445f71 in writev_nonblocking (s=<value optimized out>,
vec=0x7fffffffded0, nvec=2, bb=0xb3ce50, cumulative_bytes_written=0xb3cd48,
c=0xb3c810)
    at core_filters.c:789
#3  0x00000000004461f5 in send_brigade_nonblocking (s=0xb3c620, bb=0xb3ce50,
bytes_written=0xb3cd48, c=0xb3c810) at core_filters.c:705
#4  0x0000000000446997 in send_brigade_blocking (f=0xb3cc10, new_bb=0xb3ce50)
at core_filters.c:735
#5  ap_core_output_filter (f=0xb3cc10, new_bb=0xb3ce50) at core_filters.c:544
#6  0x0000000000461241 in ap_process_request (r=0x11e4210) at
http_request.c:369
#7  0x000000000045d662 in ap_process_http_sync_connection (c=0xb3c810) at
http_core.c:190
#8  ap_process_http_connection (c=0xb3c810) at http_core.c:231
#9  0x0000000000455220 in ap_run_process_connection (c=0xb3c810) at
connection.c:41
#10 0x00000000004679be in child_main (child_num_arg=<value optimized out>) at
prefork.c:704
#11 0x0000000000467bd7 in make_child (s=0x6be538, slot=0) at prefork.c:746
#12 0x0000000000468776 in prefork_run (_pconf=<value optimized out>,
plog=0x6c2378, s=0x6be538) at prefork.c:956
#13 0x0000000000430c7e in ap_run_mpm (pconf=0x695138, plog=0x6c2378,
s=0x6be538) at mpm_common.c:96
#14 0x000000000042af64 in main (argc=2, argv=0x7fffffffe638) at main.c:777
(gdb)

This is basically causing below.

[Thu Jul 31 14:34:43.437659 2014] [core:notice] [pid 31364] AH00052: child pid
31405 exit signal Segmentation fault (11)
[Thu Jul 31 14:34:43.437684 2014] [core:notice] [pid 31364] AH00052: child pid
31409 exit signal Segmentation fault (11)
[Thu Jul 31 14:34:43.437700 2014] [core:notice] [pid 31364] AH00052: child pid
31412 exit signal Segmentation fault (11)
[Thu Jul 31 14:34:43.437716 2014] [core:notice] [pid 31364] AH00052: child pid
31414 exit signal Segmentation fault (11)
[Thu Jul 31 14:34:43.437781 2014] [core:notice] [pid 31364] AH00052: child pid
31428 exit signal Segmentation fault (11)
[Thu Jul 31 14:34:43.437798 2014] [core:notice] [pid 31364] AH00052: child pid
31434 exit signal Segmentation fault (11)
[Thu Jul 31 14:34:43.437822 2014] [core:notice] [pid 31364] AH00052: child pid
31444 exit signal Segmentation fault (11)

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