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Posted to bugs@httpd.apache.org by bu...@apache.org on 2004/11/19 19:50:13 UTC
DO NOT REPLY [Bug 32325] New: -
Deadlock situation detected/avoided: Failed to acquire global mutex lock
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http://issues.apache.org/bugzilla/show_bug.cgi?id=32325
Summary: Deadlock situation detected/avoided: Failed to acquire
global mutex lock
Product: Apache httpd-2.0
Version: 2.0.52
Platform: Sun
OS/Version: Solaris
Status: NEW
Severity: normal
Priority: P3
Component: All
AssignedTo: bugs@httpd.apache.org
ReportedBy: asmorgrav@yahoo.no
The following error message appears in the error log file of a virtual host
under load:
[warn] (45)Deadlock situation detected/avoided: Failed to acquire global mutex
lock
Then, the following error message appears in the main server error log:
[emerg] (45)Deadlock situation detected/avoided: apr_proc_mutex_lock failed.
Attempting to shutdown process gracefully.
Then a new process is spawned and operations resume.
I have this problem with Apache 2.0.52 on Sun Solaris 8 (USparc), but I am
unable to reproduce it using Apache 2.0.49 with the exact same configuration.
During compilation of both server versions I use the following configuration
flags (in addition to enabling modules): --enable-rule=SHARED_CORE
--enable-rule=SSL_EXPERIMENTAL --with-mpm=worker --enable-nonportable-atomics
--with-ssl=/u01/opt --with-expat=$PWD/`ls -d srclib/apr-util/xml/expat`
# apache2/bin/httpd -V
Server version: Apache/2.0.52
Server built: Oct 19 2004 12:07:03
Server's Module Magic Number: 20020903:9
Architecture: 32-bit
Server compiled with....
-D APACHE_MPM_DIR="server/mpm/worker"
-D APR_HAS_SENDFILE
-D APR_HAS_MMAP
-D APR_HAVE_IPV6 (IPv4-mapped addresses enabled)
-D APR_USE_FCNTL_SERIALIZE
-D APR_USE_PTHREAD_SERIALIZE
-D SINGLE_LISTEN_UNSERIALIZED_ACCEPT
-D APR_HAS_OTHER_CHILD
-D AP_HAVE_RELIABLE_PIPED_LOGS
-D HTTPD_ROOT="/u01/opt/apache2"
-D SUEXEC_BIN="/u01/opt/apache2/bin/suexec"
-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"
# apache2/bin/httpd -l
Compiled in modules:
core.c
mod_access.c
mod_log_config.c
mod_env.c
mod_headers.c
mod_setenvif.c
mod_proxy.c
proxy_connect.c
proxy_ftp.c
proxy_http.c
worker.c
http_core.c
mod_mime.c
mod_status.c
mod_autoindex.c
mod_cgi.c
mod_negotiation.c
mod_dir.c
mod_userdir.c
mod_alias.c
mod_rewrite.c
mod_so.c
DSO Modules included:
apache2.0.52/modules/mod_info.so
apache2.0.52/modules/mod_expires.so
apache2.0.52/modules/mod_deflate.so
apache2.0.52/modules/mod_ssl.so
siteminder/webagent/lib/libmod_sm20.so
siteminder/webagent/lib/libbtunicode.so
siteminder/webagent/lib/libsmlogging.so
siteminder/webagent/lib/libsmgda.so
siteminder/webagent/lib/libsmvariable.so
I use
AcceptMutex default
SSLMutex default
According to the logs they default to fcntl and shmcb respectively.
Another user has reported getting the same error with 2.0.51 on the Apache
mailing list. He also uses the worker MPM and modSSL, but not the siteminder
stuff.
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