httpd-users mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Jeff Trawick <traw...@gmail.com>
Subject Re: [users@httpd] Apache Startup Problems with mod_wsgi : Missing Symbols ap_cleanup_scoreboard and ap_accept_lock_mech
Date Sun, 21 Nov 2010 21:06:31 GMT
On Sun, Nov 21, 2010 at 3:22 PM, Anurag Chourasia
<anurag.chourasia@gmail.com> wrote:
> All,
> I hope you could help me with a mod_wsgi load error upon startup of apache.
> This is affecting one of our site Go Live and I would appreciate any help
> offered in this regard.
> The error upon startup of Apache is as follows
> root [zibal]% ./usr/local/apache2/bin/apachectl restart
> httpd: Syntax error on line 53 of /usr/local/apache2/conf/httpd.conf:
> Cannot load /usr/local/apache2/modules/mod_wsgi.so into server:
> rtld:0712-001 Symbol ap_cleanup_scoreboard was referenced from module
> /usr/local/apache2/modules/mod_wsgi.so(), but a runtime definition of the
> symbol was not found.
> rtld: 0712-001 Symbol ap_accept_lock_mech was referenced from module
> /usr/local/apache2/modules/mod_wsgi.so(), but a runtime definition of the
> symbol was not found.

those two functions aren't APIs (not expected to be called by
modules), so maybe they aren't visible?

perhaps there are special instructions *somewhere* from someone who
has gotten mod_wsgi to work on AIX, as it is not supposed to work

patch httpd with this, rebuild completely, and see if that gets you
going; the two missing symbols should be exported with this patch

Index: include/mpm_common.h
===================================================================
--- include/mpm_common.h	(revision 1034992)
+++ include/mpm_common.h	(working copy)
@@ -298,7 +298,7 @@
  * The system mutex implementation to use for the accept mutex.
  */
 #ifdef AP_MPM_WANT_SET_ACCEPT_LOCK_MECH
-extern apr_lockmech_e ap_accept_lock_mech;
+AP_DECLARE_DATA extern apr_lockmech_e ap_accept_lock_mech;
 extern const char ap_valid_accept_mutex_string[];
 const char *ap_mpm_set_accept_lock_mech(cmd_parms *cmd, void *dummy,
                                         const char *arg);
Index: include/scoreboard.h
===================================================================
--- include/scoreboard.h	(revision 1034992)
+++ include/scoreboard.h	(working copy)
@@ -178,7 +178,7 @@
 apr_status_t ap_reopen_scoreboard(apr_pool_t *p, apr_shm_t **shm, int
detached);
 void ap_init_scoreboard(void *shared_score);
 AP_DECLARE(int) ap_calc_scoreboard_size(void);
-apr_status_t ap_cleanup_scoreboard(void *d);
+AP_DECLARE(apr_status_t) ap_cleanup_scoreboard(void *d);

 AP_DECLARE(void) ap_create_sb_handle(ap_sb_handle_t **new_sbh, apr_pool_t *p,
                                      int child_num, int thread_num);


>
> I am pasting the output of nm command on the apache executable and those
> symbols seem to exist.
> root [zibal]% nm ./usr/local/apache2/bin/httpd | grep  ap_accept_lock_mech
> ap_accept_lock_mech  D   536880332
> ap_accept_lock_mech  d   536900392           4
> ap_accept_lock_mech:G879 -           0
> root [zibal]% nm ./usr/local/apache2/bin/httpd | grep ap_cleanup_scoreboard
> .ap_cleanup_scoreboard T   268613428         212
> ap_cleanup_scoreboard D   536890068
> ap_cleanup_scoreboard d   536890068          12
> ap_cleanup_scoreboard d   536899972           4
> ap_cleanup_scoreboard:F385 -        2976
>
> I am wondering if there is a way to statically link mod_wsgi into apache?
> Please guide.
> I built Apache 2.2.17 and Mod_Wsgi 3.3 using the source and the compiler was
> gcc-4.2.
>
> Here is the Apache Build Information
> =====================================
> root [zibal]% ./usr/local/apache2/bin/httpd -V
> Server version: Apache/2.2.17 (Unix)
> Server built:   Nov 18 2010 05:04:25
> Server's Module Magic Number: 20051115:25
> Server loaded:  APR 1.4.2, APR-Util 1.3.10
> Compiled using: APR 1.4.2, APR-Util 1.3.10
> Architecture:   32-bit
> Server MPM:     Prefork
>  threaded:     no
>    forked:     yes (variable process count)
> Server compiled with....
>  -D APACHE_MPM_DIR="server/mpm/prefork"
>  -D APR_HAS_SENDFILE
>  -D APR_HAS_MMAP
>  -D APR_HAVE_IPV6 (IPv4-mapped addresses enabled)
>  -D APR_USE_SYSVSEM_SERIALIZE
>  -D APR_USE_PTHREAD_SERIALIZE
>  -D SINGLE_LISTEN_UNSERIALIZED_ACCEPT
>  -D APR_HAS_OTHER_CHILD
>  -D AP_HAVE_RELIABLE_PIPED_LOGS
>  -D DYNAMIC_MODULE_LIMIT=128
>  -D HTTPD_ROOT="/usr/local/apache2"
>  -D SUEXEC_BIN="/usr/local/apache2/bin/suexec"
>  -D DEFAULT_PIDLOG="logs/httpd.pid"
>  -D DEFAULT_SCOREBOARD="logs/apache_runtime_status"
>  -D DEFAULT_LOCKFILE="logs/accept.lock"
>  -D DEFAULT_ERRORLOG="logs/error_log"
>  -D AP_TYPES_CONFIG_FILE="conf/mime.types"
>  -D SERVER_CONFIG_FILE="conf/httpd.conf"
> Contents of config.nice file are as follows
> ++++++++++++++++++++++++
> #! /bin/sh
> #
> # Created by configure
> CC="gcc"; export CC
> "./configure" \
> "CC=gcc" \
> "$@"
> ++++++++++++++++++++++++
>
>
> Information about Apache Modules Loaded
> =======================================
> root [zibal]% ./usr/local/apache2/bin/httpd -l
> Compiled in modules:
>  core.c
>  mod_authn_file.c
>  mod_authn_default.c
>  mod_authz_host.c
>  mod_authz_groupfile.c
>  mod_authz_user.c
>  mod_authz_default.c
>  mod_auth_basic.c
>  mod_include.c
>  mod_filter.c
>  mod_log_config.c
>  mod_env.c
>  mod_setenvif.c
>  mod_version.c
>  prefork.c
>  http_core.c
>  mod_mime.c
>  mod_status.c
>  mod_autoindex.c
>  mod_asis.c
>  mod_cgi.c
>  mod_negotiation.c
>  mod_dir.c
>  mod_actions.c
>  mod_userdir.c
>  mod_alias.c
>  mod_so.c
>
> In httpd.conf, i only have the following LoadModule Statement
> =============================================================
> LoadModule wsgi_module modules/mod_wsgi.so
> Information about Global Accept Mutex
> =====================================
> Valid accept mutexes for this platform and MPM are: default, fcntl,
> sysvsem, posixsem, pthread.
> Alo, here is my build session transcript while building mod_wsgi.....There
> was absolutely no error during build.
> root [zibal]% make
>         /usr/local/apache2/bin/apxs -c -I/usr/local/include/python2.6
> -DNDEBUG   mod_wsgi.c -L/usr/local/lib -L/usr/local/lib/python2.6/config
>  -lpython2.6 -ldl -lm
> /usr/local/apache2/build/libtool --silent --mode=compile gcc -prefer-pic
> -U__STR__ -D_THREAD_SAFE -D_USE_IRS -D_LARGEFILE64_SOURCE -g -O2 -pthread
> -I/usr/local/apache2/include  -I/usr/local/apache2/include
> -I/usr/local/apache2/include -I/usr/local/include
> -I/usr/local/include/python2.6 -DNDEBUG  -c -o mod_wsgi.lo mod_wsgi.c &&
> touch mod_wsgi.slo
> /usr/local/apache2/build/libtool --silent --mode=link gcc -o mod_wsgi.la
>  -rpath /usr/local/apache2/modules -module -avoid-version  -Wl,-brtl
>  mod_wsgi.lo -L/usr/local/lib -L/usr/local/lib/python2.6/config -lpython2.6
> -ldl -lm
> Target "all" is up to date.
> root [zibal]% make install
>         /usr/local/apache2/bin/apxs -i -S
> LIBEXECDIR=/usr/local/apache2/modules -n 'mod_wsgi' mod_wsgi.la
> /usr/local/apache2/build/instdso.sh
> SH_LIBTOOL='/usr/local/apache2/build/libtool' mod_wsgi.la
> /usr/local/apache2/modules
> rm -f /usr/local/apache2/modules/mod_wsgi.so
> /usr/local/apache2/build/libtool --mode=install cp mod_wsgi.la
> /usr/local/apache2/modules/
> cp .libs/mod_wsgi.so /usr/local/apache2/modules/mod_wsgi.so
> cp .libs/mod_wsgi.lai /usr/local/apache2/modules/mod_wsgi.la
> cp .libs/mod_wsgi.a /usr/local/apache2/modules/mod_wsgi.a
> chmod 644 /usr/local/apache2/modules/mod_wsgi.a
> ranlib /usr/local/apache2/modules/mod_wsgi.a
> ----------------------------------------------------------------------
> Libraries have been installed in:
>    /usr/local/apache2/modules
> If you ever happen to want to link against installed libraries
> in a given directory, LIBDIR, you must either use libtool, and
> specify the full pathname of the library, or use the `-LLIBDIR'
> flag during linking and do at least one of the following:
>    - add LIBDIR to the `LIBPATH' environment variable
>      during execution
>    - use the
> `-Wl,-blibpath:LIBDIR:/opt/freeware/lib/gcc/powerpc-ibm-aix5.3.0.0/4.2.4:/opt/freeware/lib/gcc/powerpc-ibm-aix5.3.0.0/4.2.4/../../..:/usr/lib:/lib
> ' linker flag
> See any operating system documentation about shared libraries for
> more information, such as the ld(1) and ld.so(8) manual pages.
> ----------------------------------------------------------------------
> chmod 755 /usr/local/apache2/modules/mod_wsgi.so
> Please let me know if I should provide some additional information.
> Regards,
> Anurag



-- 
Born in Roswell... married an alien...

---------------------------------------------------------------------
The official User-To-User support forum of the Apache HTTP Server Project.
See <URL:http://httpd.apache.org/userslist.html> for more info.
To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
   "   from the digest: users-digest-unsubscribe@httpd.apache.org
For additional commands, e-mail: users-help@httpd.apache.org


Mime
View raw message