Description:
------------
Description:
php-fpm is randomly crashing with error message:

WARNING: [pool www] child 20063 exited on signal 11 (SIGSEGV - core dumped) after 187826.894044 seconds from start

PHP package details:
PHP 5.3.18 (cli) (built: Nov  5 2012 19:35:04) 
Copyright (c) 1997-2012 The PHP Group
Zend Engine v2.3.0, Copyright (c) 1998-2012 Zend Technologies

Configuration command:
Configure Command =>  './configure'  '--build=x86_64-redhat-linux-gnu' '--host=x86_64-redhat-linux-gnu' '--target=x86_64-amazon-linux-gnu' '--program-prefix=' '--prefix=/usr' '--exec-prefix=/usr' '--bindir=/usr/bin' '--sbindir=/usr/sbin' '--sysconfdir=/etc' '--datadir=/usr/share' '--includedir=/usr/include' '--libdir=/usr/lib64' '--libexecdir=/usr/libexec' '--localstatedir=/var' '--sharedstatedir=/var/lib' '--mandir=/usr/share/man' '--infodir=/usr/share/info' '--cache-file=../config.cache' '--with-libdir=lib64' '--with-config-file-path=/etc' '--with-config-file-scan-dir=/etc/php.d' '--disable-debug' '--with-pic' '--disable-rpath' '--without-pear' '--with-bz2' '--with-exec-dir=/usr/bin' '--with-freetype-dir=/usr' '--with-png-dir=/usr' '--with-xpm-dir=/usr' '--enable-gd-native-ttf' '--with-t1lib=/usr' '--without-gdbm' '--with-gettext' '--with-gmp' '--with-iconv' '--with-jpeg-dir=/usr' '--with-openssl' '--with-pcre-regex=/usr' '--with-zlib' '--with-layout=GNU' '--enable-exif' '--enable-ftp' '--enable-magic-quotes' '--enable-sockets' '--with-kerberos' '--enable-ucd-snmp-hack' '--enable-shmop' '--enable-calendar' '--without-sqlite' '--with-libxml-dir=/usr' '--enable-xml' '--with-system-tzdata' '--with-mhash' '--enable-force-cgi-redirect' '--libdir=/usr/lib64/php' '--enable-pcntl' '--with-imap=shared' '--with-imap-ssl' '--enable-mbstring=shared' '--enable-mbregex' '--with-gd=shared' '--enable-bcmath=shared' '--enable-dba=shared' '--with-db4=/usr' '--with-xmlrpc=shared' '--with-ldap=shared' '--with-ldap-sasl' '--enable-mysqlnd=shared' '--with-mysql=shared,mysqlnd' '--with-mysqli=shared,mysqlnd' '--enable-dom=shared' '--with-pgsql=shared' '--enable-wddx=shared' '--with-snmp=shared,/usr' '--enable-soap=shared' '--with-xsl=shared,/usr' '--enable-xmlreader=shared' '--enable-xmlwriter=shared' '--with-curl=shared,/usr' '--enable-fastcgi' '--enable-pdo=shared' '--with-pdo-odbc=shared,unixODBC,/usr' '--with-pdo-mysql=shared,mysqlnd' '--with-pdo-pgsql=shared,/usr' '--with-pdo-sqlite=shared,/usr' '--with-pdo-dblib=shared,/usr' '--with-sqlite3=shared,/usr' '--enable-json=shared' '--enable-zip=shared,/usr' '--without-readline' '--with-libedit' '--with-pspell=shared' '--enable-phar=shared' '--with-mcrypt=shared,/usr' '--with-tidy=shared,/usr' '--with-mssql=shared,/usr' '--enable-sysvmsg=shared' '--enable-sysvshm=shared' '--enable-sysvsem=shared' '--enable-posix=shared' '--with-unixODBC=shared,/usr' '--enable-fileinfo=shared' '--enable-intl=shared' '--with-icu-dir=/usr' '--with-enchant=no' '--with-recode=shared,/usr'


Any other information unique or specific to your setup:
We are custom compiling sqlite3 extension. For compilation we followed following steps:
1. Download php source code. 
2. Download latest sqlite3 source code. 
3. Copy latest sqlite files to ext/sqlite3/libsqlite/ folder. 
4. Call phpize and then configure with following flags -DHAVE_READLINE -DNO_TCL -DSQLITE_THREADSAFE=1 -DSQLITE_ENABLE_FTS3_PARENTHESIS -DHAVE_USLEEP=1-DSQLITE_ENABLE_FTS3=1.
5. Call make and copy the destination sqlite3.so to our svn folder. 
6. Using some deployment script destination sqlit3.so gets copied to php extension_dir on other machines. 

Also,We are doing a custom session handling  using  session_set_save_handler function.


gdb backtrace on machine 'A' for one occurrence of such error:

#0  0x000000000059e571 in _zval_ptr_dtor ()
#1  0x00000000005b9ce8 in zend_hash_destroy ()
#2  0x00000000005ababf in _zval_dtor_func ()
#3  0x000000000059e5b1 in _zval_ptr_dtor ()
#4  0x00000000004b10e8 in ?? ()
#5  0x00000000005b355c in ?? ()
#6  0x00000000005ba16c in zend_hash_reverse_apply ()
#7  0x00000000005ac700 in ?? ()
#8  0x0000000000559475 in php_request_shutdown ()
#9  0x0000000000641508 in ?? ()
#10 0x00007f74383b1cdd in __libc_start_main (main=0x6408b0, argc=3, ubp_av=0x7fff2d9d2e58, init=<value optimized out>, 
    fini=<value optimized out>, rtld_fini=<value optimized out>, stack_end=0x7fff2d9d2e48) at libc-start.c:226
#11 0x000000000042318d in _start ()

gdb backtrace on machine 'B' for one occurrence of such error:
#0  0x000000000058d8c8 in ?? ()
#1  0x00000000005a31f7 in destroy_op_array ()
#2  0x00000000005b9ce8 in zend_hash_destroy ()
#3  0x00000000005a2fda in destroy_zend_class ()
#4  0x00000000005b8815 in ?? ()
#5  0x00000000005ba181 in zend_hash_reverse_apply ()
#6  0x000000000059ebe6 in ?? ()
#7  0x00000000005ac7e5 in ?? ()
#8  0x0000000000559290 in php_request_shutdown ()
#9  0x0000000000641508 in ?? ()
#10 0x00007f16fe0e4cdd in __libc_start_main () from /lib64/libc.so.6
#11 0x000000000042318d in _start ()