#34149 [Opn->Fbk]: Hang (100% CPU) in malloc_consolidate

ID: 34149 Updated by: tony2001@php.net Reported By: mikael at chl dot chalmers dot se -Status: Open +Status: Feedback Bug Type: Apache2 related Operating System: Linux 2.6.10-ac9 PHP Version: 4.4.0 New Comment: Any info on how to reproduce it would be very good. Previous Comments: ------------------------------------------------------------------------ [2005-08-16 11:40:16] mikael at chl dot chalmers dot se Description: ------------ After some time (hours on a busy site), Apache processes hanged in malloc_consolidate() appear. Don't know if this really is a problem in PHP but we're hoping to get some clues, since both the backtraces we've extracted goes through libphp4.so (in php_handler() and mtx_append()) The problem appeared after upgrading from PHP 4.3.8 to 4.4.0 and the only ./configure difference was the need to add --with-imap-ssl to get 4.4.0 to build Reproduce code: --------------- Intermediate problem, hard to reproduce Actual result: -------------- If need be we can recompile apache/apr with debug symbols to try and extract more information and variable values. We have a couple of coredumps saved as it is. These are the two difference backtraces we've seen so far. #0 0xb7b9c35e in malloc_consolidate () from /lib/tls/libc.so.6 #1 0xb7b9bb29 in _int_malloc () from /lib/tls/libc.so.6 #2 0xb7b9aecd in malloc () from /lib/tls/libc.so.6 #3 0xb7d0a692 in allocator_alloc () from /usr/local/apache2/lib/libapr-0.so.0 #4 0xb7e00652 in apr_bucket_alloc () from /usr/local/apache2/lib/libaprutil-0.so.0 #5 0xb7e00063 in apr_brigade_writev () from /usr/local/apache2/lib/libaprutil-0.so.0 #6 0x08065119 in basic_http_header () #7 0x08062752 in ap_http_header_filter () #8 0x08075c6c in ap_pass_brigade () #9 0x080784cf in ap_content_length_filter () #10 0x08075c6c in ap_pass_brigade () #11 0x08063ff4 in ap_byterange_filter () #12 0x08075c6c in ap_pass_brigade () #13 0x08075c6c in ap_pass_brigade () #14 0xb77da099 in php_handler () from /foobar/web/mychl/modules/libphp4.so #15 0x08068b70 in ap_invoke_handler () #16 0x080662b5 in ap_internal_redirect () #17 0xb7ab2b7e in handler_redirect () from /foobar/web/mychl/modules/mod_rewrite.so #18 0x08068b70 in ap_invoke_handler () #19 0x0806604b in ap_process_request () #20 0x08060ebc in ap_process_http_connection () #21 0x08073b65 in ap_process_connection () #22 0x0806867a in child_main () #23 0x080679a5 in make_child () #24 0x08067bfa in perform_idle_server_maintenance () #25 0x080674bd in ap_mpm_run () #26 0x0806e9e3 in main () #0 0xb7b9c364 in malloc_consolidate () from /lib/tls/libc.so.6 #1 0xb7b9bb29 in _int_malloc () from /lib/tls/libc.so.6 #2 0xb7b9aecd in malloc () from /lib/tls/libc.so.6 #3 0xb7d0a692 in allocator_alloc () from /usr/local/apache2/lib/libapr-0.so.0 #4 0xb7d099a1 in apr_pool_create_ex () from /usr/local/apache2/lib/libapr-0.so.0 #5 0x0807f7b4 in core_output_filter () #6 0x08075c6c in ap_pass_brigade () #7 0x080628c7 in ap_http_header_filter () #8 0x08075c6c in ap_pass_brigade () #9 0x080784cf in ap_content_length_filter () #10 0x08075c6c in ap_pass_brigade () #11 0x08063ff4 in ap_byterange_filter () #12 0x08075c6c in ap_pass_brigade () #13 0x08075c6c in ap_pass_brigade () #14 0xb77da099 in mtx_append () from /foobar/web/mychl/modules/libphp4.so #15 0x08068b70 in ap_invoke_handler () #16 0x080662b5 in ap_internal_redirect () #17 0xb7ab2b7e in handler_redirect () from /foobar/web/mychl/modules/mod_rewrite.so #18 0x08068b70 in ap_invoke_handler () #19 0x0806604b in ap_process_request () #20 0x08060ebc in ap_process_http_connection () #21 0x08073b65 in ap_process_connection () #22 0x0806867a in child_main () #23 0x080679a5 in make_child () #24 0x08067bfa in perform_idle_server_maintenance () #25 0x080674bd in ap_mpm_run () #26 0x0806e9e3 in main () env CFLAGS="-O3 -march=i686" ./configure \ --with-apxs2=/usr/local/apache2/bin/apxs \ --disable-cgi \ --with-cpdflib=/usr/local \ --enable-ftp \ --with-gd \ --with-ttf=/usr \ --enable-gd-native-ttf \ --with-imap \ --with-imap-ssl \ --with-kerberos=/usr/kerberos \ --with-ldap \ --with-mysql=/usr/local/mysql-4.1 \ --with-oci8 \ --with-iodbc=/usr/local \ --enable-sockets \ --enable-yp \ --with-jpeg-dir=/usr \ --with-zlib-dir=/usr \ --with-png-dir=/usr \ --with-gettext \ --enable-exif \ --with-openssl \ --enable-pcntl \ --with-xmlrpc \ --enable-mbstring ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=34149&edit=1