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I keep getting (about every 5-6 hours) this segfault in apache:

[Tue Jun 26 12:43:10 2012] [notice] child pid 26810 exit signal Aborted (6)
*** glibc detected *** /usr/sbin/apache2: free(): invalid pointer: 0xb68c2628 ***
======= Backtrace: =========
/lib/i386-linux-gnu/libc.so.6(+0x6ff22)[0xb75aef22]
/lib/i386-linux-gnu/libc.so.6(+0x70bc2)[0xb75afbc2]
/lib/i386-linux-gnu/libc.so.6(cfree+0x6d)[0xb75b2cad]
/usr/lib/apache2/modules/libphp5.so(destroy_zend_class+0x228)[0xb5d40518]
/usr/lib/apache2/modules/libphp5.so(zend_hash_clean+0x77)[0xb5d58957]
/usr/lib/php5/220100525+lfs/apc.so(apc_interned_strings_shutdown+0x32)[0xb64930b2]
/usr/lib/apache2/modules/libphp5.so(+0x318ff0)[0xb5d56ff0]
/usr/lib/apache2/modules/libphp5.so(zend_hash_graceful_reverse_destroy+0x27)[0xb5d58a67]
/usr/lib/apache2/modules/libphp5.so(zend_destroy_modules+0x3c)[0xb5d506cc]
/usr/lib/apache2/modules/libphp5.so(+0x30c743)[0xb5d4a743]
/usr/lib/apache2/modules/libphp5.so(php_module_shutdown+0x42)[0xb5ce5172]
/usr/lib/apache2/modules/libphp5.so(php_module_shutdown_wrapper+0x17)[0xb5ce5257]
/usr/lib/apache2/modules/libphp5.so(+0x3bebe1)[0xb5dfcbe1]
/usr/lib/libapr-1.so.0(+0x19846)[0xb76f2846]
/usr/lib/libapr-1.so.0(apr_pool_destroy+0x52)[0xb76f19ec]
/usr/sbin/apache2(+0x4ccee)[0xb77eccee]
======= Memory map: ========
b2e18000-b2e2c000 rw-s 00000000 00:04 8841030    /dev/zero (deleted)
b2e2c000-b2eaa000 rw-s 00000000 00:04 8841029    /dev/zero (deleted)
b2eaa000-b2eab000 ---p 00000000 00:00 0 
b2eab000-b36ab000 rw-p 00000000 00:00 0 
b5900000-b5921000 rw-p 00000000 00:00 0 
b5921000-b5a00000 ---p 00000000 00:00 0 
b5a3e000-b60bd000 r-xp 00000000 ca:00 44137      /usr/lib/apache2/modules/libphp5.so
b60bd000-b611e000 r--p 0067f000 ca:00 44137      /usr/lib/apache2/modules/libphp5.so
b611e000-b6123000 rw-p 006e0000 ca:00 44137      /usr/lib/apache2/modules/libphp5.so
b6123000-b6142000 rw-p 00000000 00:00 0 
b6142000-b6147000 r-xp 00000000 ca:00 24570      /lib/i386-linux-gnu/libnss_dns-2.13.so
b6147000-b6148000 r--p 00004000 ca:00 24570      /lib/i386-linux-gnu/libnss_dns-2.13.so
b6148000-b6149000 rw-p 00005000 ca:00 24570      /lib/i386-linux-gnu/libnss_dns-2.13.so
b6149000-b6175000 rw-p 00000000 00:00 0 
b6175000-b6180000 r-xp 00000000 ca:00 24572      /lib/i386-linux-gnu/libnss_files-2.13.so
b6180000-b6181000 r--p 0000a000 ca:00 24572      /lib/i386-linux-gnu/libnss_files-2.13.so
b6181000-b6182000 rw-p 0000b000 ca:00 24572      /lib/i386-linux-gnu/libnss_files-2.13.so
b6182000-b618c000 r-xp 00000000 ca:00 24576      /lib/i386-linux-gnu/libnss_nis-2.13.so
b618c000-b618d000 r--p 00009000 ca:00 24576      /lib/i386-linux-gnu/libnss_nis-2.13.so
b618d000-b618e000 rw-p 0000a000 ca:00 24576      /lib/i386-linux-gnu/libnss_nis-2.13.so
b618e000-b6196000 r-xp 00000000 ca:00 24562      /lib/i386-linux-gnu/libnss_compat-2.13.so
b6196000-b6197000 r--p 00007000 ca:00 24562      /lib/i386-linux-gnu/libnss_compat-2.13.so
b6197000-b6198000 rw-p 00008000 ca:00 24562      /lib/i386-linux-gnu/libnss_compat-2.13.so
b6198000-b6270000 rw-p 00000000 00:00 0 
b6270000-b6274000 rw-p 00000000 00:00 0 
b6468000-b6474000 rw-p 00000000 00:00 0 
b6475000-b6479000 rw-p 00000000 00:00 0 
b6479000-b649a000 r-xp 00000000 ca:00 65670      /usr/lib/php5/220100525+lfs/apc.so
b649a000-b649b000 r--p 00021000 ca:00 65670      /usr/lib/php5/220100525+lfs/apc.so
b649b000-b649c000 rw-p 00022000 ca:00 65670      /usr/lib/php5/220100525+lfs/apc.so
b649c000-b64a1000 rw-p 00000000 00:00 0 
b64a1000-b64a6000 rw-p 00000000 00:00 0 
b64a7000-b64aa000 rw-p 00000000 00:00 0 
b64aa000-b64af000 rw-p 00000000 00:00 0 
b64b0000-b64b3000 rw-p 00000000 00:00 0 
b64bf000-b64c4000 rw-p 00000000 00:00 0 
b64c4000-b64c9000 rw-p 00000000 00:00 0 
b64c9000-b64cc000 rw-p 00000000 00:00 0 
b64cd000-b64cf000 rw-p 00000000 00:00 0 
b64ea000-b64fd000 r-xp 00000000 ca:00 24598      /lib/i386-linux-gnu/libresolv-2.13.so
b64fd000-b64fe000 r--p 00012000 ca:00 24598      /lib/i386-linux-gnu/libresolv-2.13.so
b64fe000-b64ff000 rw-p 00013000 ca:00 24598      /lib/i386-linux-gnu/libresolv-2.13.so
b64ff000-b6501000 rw-p 00000000 00:00 0 
b650e000-b652a000 r-xp 00000000 ca:00 22450      /lib/i386-linux-gnu/libgcc_s.so.1
b652a000-b652b000 r--p 0001b000 ca:00 22450      /lib/i386-linux-gnu/libgcc_s.so.1
b652b000-b652c000 rw-p 0001c000 ca:00 22450      /lib/i386-linux-gnu/libgcc_s.so.1
b652c000-b6534000 rw-p 00000000 00:00 0 
b65dd000-b65df000 rw-p 00000000 00:00 0 
b67ad000-b67c2000 r-xp 00000000 ca:00 22063      /lib/i386-linux-gnu/libnsl-2.13.so
b67c2000-b67c3000 r--p 00015000 ca:00 22063      /lib/i386-linux-gnu/libnsl-2.13.so
b67c3000-b67c4000 rw-p 00016000 ca:00 22063      /lib/i386-linux-gnu/libnsl-2.13.so
b67c4000-b67c6000 rw-p 00000000 00:00 0 
b67c6000-b67ee000 r-xp 00000000 ca:00 21904      /lib/i386-linux-gnu/libm-2.13.so
b67ee000-b67ef000 r--p 00028000 ca:00 21904      /lib/i386-linux-gnu/libm-2.13.so
b67ef000-b67f0000 rw-p 00029000 ca:00 21904      /lib/i386-linux-gnu/libm-2.13.so
b67f0000-b67f7000 r-xp 00000000 ca:00 24600      /lib/i386-linux-gnu/librt-2.13.so
b67f7000-b67f8000 r--p 00006000 ca:00 24600      /lib/i386-linux-gnu/librt-2.13.so
b67f8000-b67f9000 rw-p 00007000 ca:00 24600      /lib/i386-linux-gnu/librt-2.13.so
b6886000-b69af000 rw-p 00000000 00:00 0 
b69af000-b6b3c000 r-xp 00000000 ca:00 23592      /lib/i386-linux-gnu/libcrypto.so.1.0.0
b6b3c000-b6b4a000 r--p 0018d000 ca:00 23592      /lib/i386-linux-gnu/libcrypto.so.1.0.0
b6b4a000-b6b50000 rw-p 0019b000 ca:00 23592      /lib/i386-linux-gnu/libcrypto.so.1.0.0
b6b50000-b6b53000 rw-p 00000000 00:00 0 
b6b53000-b6b9b000 r-xp 00000000 ca:00 23621      /lib/i386-linux-gnu/libssl.so.1.0.0
b6b9b000-b6b9d000 r--p 00047000 ca:00 23621      /lib/i386-linux-gnu/libssl.so.1.0.0
b6b9d000-b6ba0000 rw-p 00049000 ca:00 23621      /lib/i386-linux-gnu/libssl.so.1.0.0
b6ba0000-b6c7e000 r-xp 00000000 ca:00 9878       /usr/lib/i386-linux-gnu/libstdc++.so.6.0.16
b6c7e000-b6c7f000 ---p 000de000 ca:00 9878       /usr/lib/i386-linux-gnu/libstdc++.so.6.0.16
b6c7f000-b6c83000 r--p 000de000 ca:00 9878       /usr/lib/i386-linux-gnu/libstdc++.so.6.0.16
b6c83000-b6c84000 rw-p 000e2000 ca:00 9878       /usr/lib/i386-linux-gnu/libstdc++.so.6.0.16
b6c84000-b6c8b000 rw-p 00000000 00:00 0 
b6c93000-b6cd4000 rw-p 00000000 00:00 0 
b6cd4000-b6ce0000 rw-p 00000000 00:00 0 
b6cea000-b6cef000 r-xp 00000000 ca:00 45178      /usr/lib/apache2/modules/mod_status.so
b6cef000-b6cf0000 r--p 00004000 ca:00 45178      /usr/lib/apache2/modules/mod_status.so
b6cf0000-b6cf1000 rw-p 00005000 ca:00 45178      /usr/lib/apache2/modules/mod_status.so
b6cf1000-b6d19000 r-xp 00000000 ca:00 45175      /usr/lib/apache2/modules/mod_ssl.so
b6d19000-b6d1a000 ---p 00028000 ca:00 45175      /usr/lib/apache2/modules/mod_ssl.so
b6d1a000-b6d1b000 r--p 00028000 ca:00 45175      /usr/lib/apache2/modules/mod_ssl.so
b6d1b000-b6d1c000 rw-p 00029000 ca:00 45175      /usr/lib/apache2/modules/mod_ssl.so
b6d1c000-b6d1e000 rw-p 00000000 00:00 0 
b6d1e000-b6d20000 r-xp 00000000 ca:00 45166      /usr/lib/apache2/modules/mod_setenvif.so
b6d20000-b6d21000 r--p 00001000 ca:00 45166      /usr/lib/apache2/modules/mod_setenvif.so
b6d21000-b6d22000 rw-p 00002000 ca:00 45166      /usr/lib/apache2/modules/mod_setenvif.so
b6d22000-b6d30000 r-xp 00000000 ca:00 45195      /usr/lib/apache2/modules/mod_rewrite.so
b6d30000-b6d31000 r--p 0000e000 ca:00 45195      /usr/lib/apache2/modules/mod_rewrite.so
b6d31000-b6d32000 rw-p 0000f000 ca:00 45195      /usr/lib/apache2/modules/mod_rewrite.so
b6d32000-b6d45000 r-xp 00000000 ca:00 45168      /usr/lib/apache2/modules/mod_proxy.so
b6d45000-b6d46000 r--p 00012000 ca:00 45168      /usr/lib/apache2/modules/mod_proxy.so
b6d46000-b6d47000 rw-p 00013000 ca:00 45168      /usr/lib/apache2/modules/mod_proxy.so
b6d47000-b6d4e000 r-xp 00000000 ca:00 9904       /usr/lib/i386-linux-gnu/libkrb5support.so.0.1
b6d4e000-b6d4f000 r--p 00006000 ca:00 9904       /usr/lib/i386-linux-gnu/libkrb5support.so.0.1
b6d4f000-b6d50000 rw-p 00007000 ca:00 9904       /usr/lib/i386-linux-gnu/libkrb5support.so.0.1
b6d50000-b6e97000 r-xp 00000000 ca:00 3416       /usr/lib/libxml2.so.2.7.8
b6e97000-b6e9b000 r--p 00147000 ca:00 3416       /usr/lib/libxml2.so.2.7.8
b6e9b000-b6e9c000 rw-p 0014b000 ca:00 3416       /usr/lib/libxml2.so.2.7.8
b6e9c000-b6e9d000 rw-p 00000000 00:00 0 
b6e9d000-b6ec4000 r-xp 00000000 ca:00 12282      /usr/lib/i386-linux-gnu/libk5crypto.so.3.1
b6ec4000-b6ec5000 r--p 00026000 ca:00 12282      /usr/lib/i386-linux-gnu/libk5crypto.so.3.1
b6ec5000-b6ec6000 rw-p 00027000 ca:00 12282      /usr/lib/i386-linux-gnu/libk5crypto.so.3.1
b6ec6000-b6f88000 r-xp 00000000 ca:00 13335      /usr/lib/i386-linux-gnu/libkrb5.so.3.3
b6f88000-b6f8e000 r--p 000c1000 ca:00 13335      /usr/lib/i386-linux-gnu/libkrb5.so.3.3
b6f8e000-b6f8f000 rw-p 000c7000 ca:00 13335      /usr/lib/i386-linux-gnu/libkrb5.so.3.3
b6f8f000-b6fca000 r-xp 00000000 ca:00 9854       /usr/lib/i386-linux-gnu/libgssapi_krb5.so.2.2
b6fca000-b6fcb000 ---p 0003b000 ca:00 9854       /usr/lib/i386-linux-gnu/libgssapi_krb5.so.2.2
b6fcb000-b6fcc000 r--p 0003b000 ca:00 9854       /usr/lib/i386-linux-gnu/libgssapi_krb5.so.2.2
b6fcc000-b6fcd000 rw-p 0003c000 ca:00 9854       /usr/lib/i386-linux-gnu/libgssapi_krb5.so.2.2
b6fcd000-b6fdc000 r-xp 00000000 ca:00 21797      /lib/libbz2.so.1.0.4
b6fdc000-b6fdd000 r--p 0000e000 ca:00 21797      /lib/libbz2.so.1.0.4
b6fdd000-b6fde000 rw-p 0000f000 ca:00 21797      /lib/libbz2.so.1.0.4
b6fde000-b702a000 r-xp 00000000 ca:00 2505       /usr/lib/libqdbm.so.14.13.0
b702a000-b702b000 r--p 0004c000 ca:00 2505       /usr/lib/libqdbm.so.14.13.0
b702b000-b702c000 rw-p 0004d000 ca:00 2505       /usr/lib/libqdbm.so.14.13.0
b702c000-b71aa000 r-xp 00000000 ca:00 10201      /usr/lib/i386-linux-gnu/libdb-4.8.so
b71aa000-b71ac000 r--p 0017d000 ca:00 10201      /usr/lib/i386-linux-gnu/libdb-4.8.so
b71ac000-b71ad000 rw-p 0017f000 ca:00 10201      /usr/lib/i386-linux-gnu/libdb-4.8.so
b71ad000-b71f7000 r-xp 00000000 ca:00 23521      /lib/libssl.so.0.9.8
b71f7000-b71f8000 r--p 0004a000 ca:00 23521      /lib/libssl.so.0.9.8
b71f8000-b71fb000 rw-p 0004b000 ca:00 23521      /lib/libssl.so.0.9.8
b71fb000-b7359000 r-xp 00000000 ca:00 835379     /lib/libcrypto.so.0.9.8
b7359000-b735a000 ---p 0015e000 ca:00 835379     /lib/libcrypto.so.0.9.8
b735a000-b7362000 r--p 0015e000 ca:00 835379     /lib/libcrypto.so.0.9.8
b7362000-b7371000 rw-p 00166000 ca:00 835379     /lib/libcrypto.so.0.9.8
b7371000-b7374000 rw-p 00000000 00:00 0 
b7374000-b73ba000 r-xp 00000000 ca:00 2503       /usr/lib/libonig.so.2.0.0
b73ba000-b73bd000 rw-p 00045000 ca:00 2503       /usr/lib/libonig.so.2.0.0
b73be000-b73c0000 rw-p 00000000 00:00 0 
b73c0000-b73c7000 r-xp 00000000 ca:00 45171      /usr/lib/apache2/modules/mod_proxy_http.so
b73c7000-b73c8000 r--p 00006000 ca:00 45171      /usr/lib/apache2/modules/mod_proxy_http.so
b73c8000-b73c9000 rw-p 00007000 ca:00 45171      /usr/lib/apache2/modules/mod_proxy_http.so
b73c9000-b73dc000 r-xp 00000000 ca:00 22461      /lib/i386-linux-gnu/libz.so.1.2.3.4
b73dc000-b73dd000 r--p 00012000 ca:00 22461      /lib/i386-linux-gnu/libz.so.1.2.3.4
b73dd000-b73de000 rw-p 00013000 ca:00 22461      /lib/i386-linux-gnu/libz.so.1.2.3.4
b73de000-b73e3000 rw-p 00000000 00:00 0 
b73e3000-b73ea000 r-xp 00000000 ca:00 45188      /usr/lib/apache2/modules/mod_negotiation.so
b73ea000-b73eb000 r--p 00006000 ca:00 45188      /usr/lib/apache2/modules/mod_negotiation.so
b73eb000-b73ec000 rw-p 00007000 ca:00 45188      /usr/lib/apache2/modules/mod_negotiation.so
b73ec000-b73f1000 rw-p 00000000 00:00 0 
b73f2000-b73f5000 r-xp 00000000 ca:00 45149      /usr/lib/apache2/modules/mod_reqtimeout.so
b73f5000-b73f6000 r--p 00002000 ca:00 45149      /usr/lib/apache2/modules/mod_reqtimeout.so
b73f6000-b73f7000 rw-p 00003000 ca:00 45149      /usr/lib/apache2/modules/mod_reqtimeout.so
b73f7000-b73fc000 rw-p 00000000 00:00 0 
b73fc000-b73fe000 rw-p 00000000 00:00 0 
b73fe000-b7400000 r-xp 00000000 ca:00 22437      /lib/i386-linux-gnu/libkeyutils.so.1.3
b7400000-b7401000 r--p 00001000 ca:00 22437      /lib/i386-linux-gnu/libkeyutils.so.1.3
b7401000-b7402000 rw-p 00002000 ca:00 22437      /lib/i386-linux-gnu/libkeyutils.so.1.3
b7402000-b7407000 rw-p 00000000 00:00 0 
b7407000-b7409000 r-xp 00000000 ca:00 22344      /lib/i386-linux-gnu/libcom_err.so.2.1
b7409000-b740a000 r--p 00001000 ca:00 22344      /lib/i386-linux-gnu/libcom_err.so.2.1
b740a000-b740b000 rw-p 00002000 ca:00 22344      /lib/i386-linux-gnu/libcom_err.so.2.1
b740b000-b7410000 rw-p 00000000 00:00 0 
b7411000-b7413000 rw-p 00000000 00:00 0 
b7413000-b7416000 rw-p 00000000 00:00 0 
b7416000-b7418000 rw-p 00000000 00:00 0 
b7418000-b741c000 r-xp 00000000 ca:00 45176      /usr/lib/apache2/modules/mod_mime.so
b741c000-b741d000 r--p 00003000 ca:00 45176      /usr/lib/apache2/modules/mod_mime.so
b741d000-b741e000 rw-p 00004000 ca:00 45176      /usr/lib/apache2/modules/mod_mime.so
b741e000-b7422000 r-xp 00000000 ca:00 45162      /usr/lib/apache2/modules/mod_headers.so
b7422000-b7423000 r--p 00003000 ca:00 45162      /usr/lib/apache2/modules/mod_headers.so
b7423000-b7424000 rw-p 00004000 ca:00 45162      /usr/lib/apache2/modules/mod_headers.so
b7424000-b7426000 r-xp 00000000 ca:00 45161      /usr/lib/apache2/modules/mod_expires.so
b7426000-b7427000 r--p 00001000 ca:00 45161      /usr/lib/apache2/modules/mod_expires.so
b7427000-b7428000 rw-p 00002000 ca:00 45161      /usr/lib/apache2/modules/mod_expires.so
b7428000-b742a000 r-xp 00000000 ca:00 45189      /usr/lib/apache2/modules/mod_dir.so
b742a000-b742b000 r--p 00001000 ca:00 45189      /usr/lib/apache2/modules/mod_dir.so
b742b000-b742c000 rw-p 00002000 ca:00 45189      /usr/lib/apache2/modules/mod_dir.so
b742c000-b742e000 rw-p 00000000 00:00 0 
b742f000-b7430000 r-xp 00000000 ca:00 45158      /usr/lib/apache2/modules/mod_env.so
b7430000-b7431000 r--p 00000000 ca:00 45158      /usr/lib/apache2/modules/mod_env.so
b7431000-b7432000 rw-p 00001000 ca:00 45158      /usr/lib/apache2/modules/mod_env.so
b7432000-b7437000 rw-p 00000000 00:00 0 
b7437000-b743c000 r-xp 00000000 ca:00 45155      /usr/lib/apache2/modules/mod_deflate.so
b743c000-b743d000 r--p 00004000 ca:00 45155      /usr/lib/apache2/modules/mod_deflate.so
b743d000-b743e000 rw-p 00005000 ca:00 45155      /usr/lib/apache2/modules/mod_deflate.so
b743e000-b7443000 rw-p 00000000 00:00 0 
b7443000-b7448000 r-xp 00000000 ca:00 45184      /usr/lib/apache2/modules/mod_cgi.so
b7448000-b7449000 r--p 00004000 ca:00 45184      /usr/lib/apache2/modules/mod_cgi.so
b7449000-b744a000 rw-p 00005000 ca:00 45184      /usr/lib/apache2/modules/mod_cgi.so
b744a000-b744f000 rw-p 00000000 00:00 0 
b744f000-b7457000 r-xp 00000000 ca:00 45179      /usr/lib/apache2/modules/mod_autoindex.so
b7457000-b7458000 r--p 00007000 ca:00 45179      /usr/lib/apache2/modules/mod_autoindex.so
b7458000-b7459000 rw-p 00008000 ca:00 45179      /usr/lib/apache2/modules/mod_autoindex.so
b7459000-b745e000 rw-p 00000000 00:00 0 
b745e000-b745f000 r-xp 00000000 ca:00 45136      /usr/lib/apache2/modules/mod_authz_user.so
b745f000-b7460000 r--p 00000000 ca:00 45136      /usr/lib/apache2/modules/mod_authz_user.so
b7460000-b7461000 rw-p 00001000 ca:00 45136      /usr/lib/apache2/modules/mod_authz_user.so
b7461000-b7466000 rw-p 00000000 00:00 0 
b7466000-b7468000 r-xp 00000000 ca:00 45134      /usr/lib/apache2/modules/mod_authz_host.so
b7468000-b7469000 r--p 00001000 ca:00 45134      /usr/lib/apache2/modules/mod_authz_host.so
b7469000-b746a000 rw-p 00002000 ca:00 45134      /usr/lib/apache2/modules/mod_authz_host.so
b746a000-b746f000 rw-p 00000000 00:00 0 
b746f000-b7471000 r-xp 00000000 ca:00 45135      /usr/lib/apache2/modules/mod_authz_groupfile.so
b7471000-b7472000 r--p 00001000 ca:00 45135      /usr/lib/apache2/modules/mod_authz_groupfile.so
b7472000-b7473000 rw-p 00002000 ca:00 45135      /usr/lib/apache2/modules/mod_authz_groupfile.so
b7473000-b7478000 rw-p 00000000 00:00 0 
b7478000-b7479000 r-xp 00000000 ca:00 45140      /usr/lib/apache2/modules/mod_authz_default.so
b7479000-b747a000 r--p 00000000 ca:00 45140      /usr/lib/apache2/modules/mod_authz_default.so
b747a000-b747b000 rw-p 00001000 ca:00 45140      /usr/lib/apache2/modules/mod_authz_default.so
b747b000-b7480000 rw-p 00000000 00:00 0 
b7480000-b7481000 r-xp 00000000 ca:00 44436      /usr/lib/apache2/modules/mod_authn_file.so
b7481000-b7482000 ---p 00001000 ca:00 44436      /usr/lib/apache2/modules/mod_authn_file.so
b7482000-b7483000 r--p 00001000 ca:00 44436      /usr/lib/apache2/modules/mod_authn_file.so
b7483000-b7484000 rw-p 00002000 ca:00 44436      /usr/lib/apache2/modules/mod_authn_file.so
b7484000-b7489000 rw-p 00000000 00:00 0 
b7489000-b748b000 r-xp 00000000 ca:00 45141      /usr/lib/apache2/modules/mod_auth_basic.so
b748b000-b748c000 r--p 00001000 ca:00 45141      /usr/lib/apache2/modules/mod_auth_basic.so
b748c000-b748d000 rw-p 00002000 ca:00 45141      /usr/lib/apache2/modules/mod_auth_basic.so
b748d000-b7492000 rw-p 00000000 00:00 0 
b7492000-b7495000 r-xp 00000000 ca:00 45194      /usr/lib/apache2/modules/mod_alias.so
b7495000-b7496000 r--p 00002000 ca:00 45194      /usr/lib/apache2/modules/mod_alias.so
b7496000-b7497000 rw-p 00003000 ca:00 45194      /usr/lib/apache2/modules/mod_alias.so
b7497000-b74d8000 rw-p 00000000 00:00 0 
b74d8000-b74db000 r-xp 00000000 ca:00 21902      /lib/i386-linux-gnu/libdl-2.13.so
b74db000-b74dc000 r--p 00002000 ca:00 21902      /lib/i386-linux-gnu/libdl-2.13.so
b74dc000-b74dd000 rw-p 00003000 ca:00 21902      /lib/i386-linux-gnu/libdl-2.13.so
b74dd000-b74de000 rw-p 00000000 00:00 0 
b74de000-b74e2000 r-xp 00000000 ca:00 22401      /lib/i386-linux-gnu/libuuid.so.1.3.0
b74e2000-b74e3000 r--p 00003000 ca:00 22401      /lib/i386-linux-gnu/libuuid.so.1.3.0
b74e3000-b74e4000 rw-p 00004000 ca:00 22401      /lib/i386-linux-gnu/libuuid.so.1.3.0
b74e4000-b750a000 r-xp 00000000 ca:00 22420      /lib/i386-linux-gnu/libexpat.so.1.5.2
b750a000-b750b000 ---p 00026000 ca:00 22420      /lib/i386-linux-gnu/libexpat.so.1.5.2
b750b000-b750d000 r--p 00026000 ca:00 22420      /lib/i386-linux-gnu/libexpat.so.1.5.2
b750d000-b750e000 rw-p 00028000 ca:00 22420      /lib/i386-linux-gnu/libexpat.so.1.5.2
b750e000-b7516000 r-xp 00000000 ca:00 21889      /lib/i386-linux-gnu/libcrypt-2.13.so
b7516000-b7517000 r--p 00007000 ca:00 21889      /lib/i386-linux-gnu/libcrypt-2.13.so
b7517000-b7518000 rw-p 00008000 ca:00 21889      /lib/i386-linux-gnu/libcrypt-2.13.so
b7518000-b753f000 rw-p 00000000 00:00 0 
b753f000-b76b7000 r-xp 00000000 ca:00 21864      /lib/i386-linux-gnu/libc-2.13.so
b76b7000-b76b9000 r--p 00178000 ca:00 21864      /lib/i386-linux-gnu/libc-2.13.so
b76b9000-b76ba000 rw-p 0017a000 ca:00 21864      /lib/i386-linux-gnu/libc-2.13.so
b76ba000-b76bd000 rw-p 00000000 00:00 0 
b76bd000-b76d4000 r-xp 00000000 ca:00 24594      /lib/i386-linux-gnu/libpthread-2.13.so
b76d4000-b76d5000 r--p 00016000 ca:00 24594      /lib/i386-linux-gnu/libpthread-2.13.so
b76d5000-b76d6000 rw-p 00017000 ca:00 24594      /lib/i386-linux-gnu/libpthread-2.13.so
b76d6000-b76d9000 rw-p 00000000 00:00 0 
b76d9000-b770c000 r-xp 00000000 ca:00 6233       /usr/lib/libapr-1.so.0.4.5
b770c000-b770d000 r--p 00032000 ca:00 6233       /usr/lib/libapr-1.so.0.4.5
b770d000-b770e000 rw-p 00033000 ca:00 6233       /usr/lib/libapr-1.so.0.4.5
b770e000-b772f000 r-xp 00000000 ca:00 6236       /usr/lib/libaprutil-1.so.0.3.12
b772f000-b7730000 r--p 00020000 ca:00 6236       /usr/lib/libaprutil-1.so.0.3.12
b7730000-b7731000 rw-p 00021000 ca:00 6236       /usr/lib/libaprutil-1.so.0.3.12
b7731000-b776e000 r-xp 00000000 ca:00 22336      /lib/i386-linux-gnu/libpcre.so.3.12.1
b776e000-b776f000 r--p 0003c000 ca:00 22336      /lib/i386-linux-gnu/libpcre.so.3.12.1
b776f000-b7770000 rw-p 0003d000 ca:00 22336      /lib/i386-linux-gnu/libpcre.so.3.12.1
b7770000-b7780000 rw-p 00000000 00:00 0 
b7780000-b779e000 r-xp 00000000 ca:00 21844      /lib/i386-linux-gnu/ld-2.13.so
b779e000-b779f000 r--p 0001d000 ca:00 21844      /lib/i386-linux-gnu/ld-2.13.so
b779f000-b77a0000 rw-p 0001e000 ca:00 21844      /lib/i386-linux-gnu/ld-2.13.so
b77a0000-b7803000 r-xp 00000000 ca:00 44432      /usr/lib/apache2/mpm-prefork/apache2
b7803000-b7805000 r--p 00063000 ca:00 44432      /usr/lib/apache2/mpm-prefork/apache2
b7805000-b7807000 rw-p 00065000 ca:00 44432      /usr/lib/apache2/mpm-prefork/apache2
b7807000-b780a000 rw-p 00000000 00:00 0 
b7a17000-b7a55000 rw-p 00000000 00:00 0          [heap]
b7a55000-b7b9f000 rw-p 00000000 00:00 0          [heap]
b7b9f000-b7c1a000 rw-p 00000000 00:00 0          [heap]
bf9a1000-bf9c2000 rw-p 00000000 00:00 0          [stack]
f57fe000-f57ff000 r-xp 00000000 00:00 0          [vdso]
[Tue Jun 26 13:15:10 2012] [notice] child pid 26840 exit signal Aborted (6)

Sometimes it recovers, but sometimes it kills the server. It's unclear to me what glibc is doing to crash.. can anyone decipher what's crashing in this error log?

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I did recently turn on extension=apc.so for the first time.. not sure if I have to turn something else off after doing this.. –  tester Jun 26 '12 at 20:36
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3 Answers

up vote 3 down vote accepted

If you are using PHP 5.4.x, then the latest stable version of APC (3.1.9) won't work. You need 3.1.10, which is listed currently as beta. So:

 pear install apc-beta

should do it.

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hmm pear install apc-beta didn't work, but after a pear channel update, pecl install apc-beta seems to be installing 3.1.10. I will give this a shot! thanks –  tester Jun 28 '12 at 17:24
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At least php-fpm + APC is a known problematic combination. Might also affect PHP 5.4.x + APC, too, regardless what mode (mod_php, php-fpm, suPHP ...) your PHP is running on. It's APC which is buggy in this case.

Disabling APC should help. Have you tried XCache instead?

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I tried apt installing php5-xcache, but was getting php5-xcache : Depends: phpapi-20090626+lfs.. probably doesn't play nice with 5.4 either.. –  tester Jun 26 '12 at 20:49
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according to http://xcache.lighttpd.net/, XCache 2.0.0 works with PHP 5.4, not sure if your linux distro contain up to date PHP and XCache btw, PHP 5.3 up to 5.3.14 is unstable

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