>Number: 5525 >Category: os-linux >Synopsis: Many sockets left in CLOSE_WAIT, many apache children hang >Confidential: no >Severity: serious >Priority: medium >Responsible: apache >State: open >Class: sw-bug >Submitter-Id: apache >Arrival-Date: Fri Dec 31 01:10:00 PST 1999 >Last-Modified: >Originator: [EMAIL PROTECTED] >Organization: apache >Release: 1.3.9 >Environment: Linux 2.2.7-ac2 gcc: gcc version egcs-2.91.66 19990314/Linux (egcs-1.1.2 release) uname -a: Linux srv1 2.2.7-ac2 #2 Sun May 9 23:53:58 EDT 1999 i586 unknown >Description: Apache has the following modules staticly linked: Compiled-in modules: http_core.c mod_mmap_static.c mod_env.c mod_log_config.c mod_log_agent.c mod_log_referer.c mod_mime_magic.c mod_mime.c mod_negotiation.c mod_status.c mod_info.c mod_include.c mod_autoindex.c mod_dir.c mod_cgi.c mod_asis.c mod_imap.c mod_actions.c mod_userdir.c mod_alias.c mod_rewrite.c mod_access.c mod_auth.c mod_auth_dbm.c mod_auth_db.c mod_digest.c mod_proxy.c mod_expires.c mod_headers.c mod_usertrack.c mod_unique_id.c mod_so.c mod_setenvif.c It Dynamicly loads:
LoadModule pam_auth_module libexec/mod_auth_pam.so LoadModule perl_module libexec/libperl.so LoadModule php3_module libexec/libphp3.so LoadModule roaming_module libexec/mod_roaming.so LoadModule mysql_auth_module libexec/mod_auth_mysql.so LoadModule throttle_module libexec/mod_throttle.so Apache starts up and begins to use more and more memory. It leaves many sockets in CLOSE_WAIT and the children hand and idle. CPU usage hits 100% and the load average has gotten as high as 62.00. A strace of a hung child reveals many calls to munmap(). Partial output is include as it spans many many similar lines munmap(0x403be000, 4096) = 0 munmap(0x403bd000, 4096) = 0 munmap(0x403bc000, 4096) = 0 munmap(0x403bb000, 4096) = 0 munmap(0x403ba000, 4096) = 0 munmap(0x403b9000, 4096) = 0 munmap(0x403b8000, 4096) = 0 munmap(0x403b7000, 4096) = 0 munmap(0x403b6000, 4096) = 0 munmap(0x40392000, 4096) = 0 munmap(0x40391000, 4096) = 0 munmap(0x40390000, 4096) = 0 munmap(0x4038f000, 4096) = 0 munmap(0x4038e000, 4096) = 0 munmap(0x4038d000, 4096) = 0 munmap(0x4018c000, 4096) = 0 munmap(0x40016000, 4096) = 0 munmap(0x40015000, 4096) = 0 munmap(0x40014000, 4096) = 0 This problem seems similar to one solved on solaris. If i add the following lines to my httpd.conf: ClearModuleList AddModule http_core.c AddModule mod_env.c AddModule mod_log_config.c AddModule mod_log_agent.c AddModule mod_log_referer.c AddModule mod_mime_magic.c AddModule mod_mime.c AddModule mod_negotiation.c AddModule mod_status.c AddModule mod_info.c AddModule mod_include.c AddModule mod_autoindex.c AddModule mod_dir.c AddModule mod_cgi.c AddModule mod_asis.c AddModule mod_imap.c AddModule mod_actions.c AddModule mod_userdir.c AddModule mod_alias.c AddModule mod_rewrite.c AddModule mod_access.c AddModule mod_auth.c AddModule mod_auth_dbm.c AddModule mod_auth_db.c AddModule mod_digest.c AddModule mod_proxy.c AddModule mod_expires.c AddModule mod_headers.c AddModule mod_usertrack.c AddModule mod_unique_id.c AddModule mod_so.c AddModule mod_setenvif.c Apache will take a very long time to start and use lots of memory producing this error message: Ouch! malloc failed in malloc_block() Contact me at [EMAIL PROTECTED] for more info >How-To-Repeat: Problem happens regularly. No changes were made to teh configuration. >Fix: >Audit-Trail: >Unformatted: [In order for any reply to be added to the PR database, you need] [to include <[EMAIL PROTECTED]> in the Cc line and make sure the] [subject line starts with the report component and number, with ] [or without any 'Re:' prefixes (such as "general/1098:" or ] ["Re: general/1098:"). If the subject doesn't match this ] [pattern, your message will be misfiled and ignored. The ] ["apbugs" address is not added to the Cc line of messages from ] [the database automatically because of the potential for mail ] [loops. If you do not include this Cc, your reply may be ig- ] [nored unless you are responding to an explicit request from a ] [developer. Reply only with text; DO NOT SEND ATTACHMENTS! ]
