You are viewing a plain text version of this content. The canonical link for it is here.
Posted to bugs@httpd.apache.org by bu...@apache.org on 2006/07/07 01:42:36 UTC
DO NOT REPLY [Bug 39985] New: - mod_dbd shutdown double free via dbd_close
DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG�
RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT
<http://issues.apache.org/bugzilla/show_bug.cgi?id=39985>.
ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND�
INSERTED IN THE BUG DATABASE.
http://issues.apache.org/bugzilla/show_bug.cgi?id=39985
Summary: mod_dbd shutdown double free via dbd_close
Product: Apache httpd-2
Version: 2.2.2
Platform: PC
OS/Version: Linux
Status: NEW
Severity: regression
Priority: P2
Component: Other Modules
AssignedTo: bugs@httpd.apache.org
ReportedBy: mkent@magoazul.com
My httpd threads are all exiting with:
*** glibc detected *** double free or corruption (!prev): 0xb8da2940 ***
on shutdown. And due to the MALLOC_CHECK this causes some issues.
I've isolated the problem to mod_dbd, more specifically to the
apr_pool_destroy(conn->pool) called in dbd_close during the shutdown cleanup. If
I comment out that destory, things are fine.
This didn't happen an older release of mod_dbd, but I've noticed there was some
reworking on the pools in this version.
I'll attach my gdb session were you can clearly see the problem, couldn't figure
out why this is happening though as I'm no debugging or apr wiz.
If it matters I've tried apr/apr-util 1.2.2 and 1.2.7 with the same results.
--
Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.
---------------------------------------------------------------------
To unsubscribe, e-mail: bugs-unsubscribe@httpd.apache.org
For additional commands, e-mail: bugs-help@httpd.apache.org
DO NOT REPLY [Bug 39985] - mod_dbd shutdown double free via dbd_close
Posted by bu...@apache.org.
DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG�
RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT
<http://issues.apache.org/bugzilla/show_bug.cgi?id=39985>.
ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND�
INSERTED IN THE BUG DATABASE.
http://issues.apache.org/bugzilla/show_bug.cgi?id=39985
------- Additional Comments From chrisd@pearsoncmg.com 2006-12-08 09:12 -------
Oops, sorry, didn't know! Thanks for catching that.
--
Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.
---------------------------------------------------------------------
To unsubscribe, e-mail: bugs-unsubscribe@httpd.apache.org
For additional commands, e-mail: bugs-help@httpd.apache.org
DO NOT REPLY [Bug 39985] - mod_dbd shutdown double free via dbd_close
Posted by bu...@apache.org.
DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG�
RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT
<http://issues.apache.org/bugzilla/show_bug.cgi?id=39985>.
ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND�
INSERTED IN THE BUG DATABASE.
http://issues.apache.org/bugzilla/show_bug.cgi?id=39985
------- Additional Comments From chrisd@pearsoncmg.com 2007-01-16 11:44 -------
The issues raised in this bug report should, I hope, be fixed in this
revision of mod_dbd in httpd trunk:
http://svn.apache.org/viewvc?view=rev&revision=496831
Note that the APR DBD Oracle driver needs the patch attached in PR #41250
to work with this mod_dbd fix. No other APR DBD drivers use memory sub-pools.
--
Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.
---------------------------------------------------------------------
To unsubscribe, e-mail: bugs-unsubscribe@httpd.apache.org
For additional commands, e-mail: bugs-help@httpd.apache.org
DO NOT REPLY [Bug 39985] - mod_dbd shutdown double free via dbd_close
Posted by bu...@apache.org.
DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG�
RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT
<http://issues.apache.org/bugzilla/show_bug.cgi?id=39985>.
ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND�
INSERTED IN THE BUG DATABASE.
http://issues.apache.org/bugzilla/show_bug.cgi?id=39985
------- Additional Comments From nick@webthing.com 2006-08-17 14:30 -------
I tried replying by email to try and sort this, but maybe your address here is
bogus.
=====================
Do you mind my emailing you about this?
(1) You are linking to the thread-safe libmysqlclient_r, aren't you?
(2) Can you get a traceback from this, and see if it's coming from within
function thread_end and/or mysql_thread_end?
(3) If you can't do that, please try commenting out line 790 in
apr_dbd_mysql.c, and tell me if that makes any difference. Line 790 is
an apr_pool_cleanup_register in function dbd_mysql_init. You'll see my
comment about being uncertain there!
Hope we can fix this, but I don't get the problem, so I need you to test
theories about the likely cause.
==========================
--
Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.
---------------------------------------------------------------------
To unsubscribe, e-mail: bugs-unsubscribe@httpd.apache.org
For additional commands, e-mail: bugs-help@httpd.apache.org
DO NOT REPLY [Bug 39985] - mod_dbd shutdown double free via dbd_close
Posted by bu...@apache.org.
DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG�
RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT
<http://issues.apache.org/bugzilla/show_bug.cgi?id=39985>.
ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND�
INSERTED IN THE BUG DATABASE.
http://issues.apache.org/bugzilla/show_bug.cgi?id=39985
jorton@redhat.com changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|Other Modules |mod_dbd
--
Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.
---------------------------------------------------------------------
To unsubscribe, e-mail: bugs-unsubscribe@httpd.apache.org
For additional commands, e-mail: bugs-help@httpd.apache.org
DO NOT REPLY [Bug 39985] - mod_dbd shutdown double free via dbd_close
Posted by bu...@apache.org.
DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG�
RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT
<http://issues.apache.org/bugzilla/show_bug.cgi?id=39985>.
ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND�
INSERTED IN THE BUG DATABASE.
http://issues.apache.org/bugzilla/show_bug.cgi?id=39985
nick@webthing.com changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |NEEDINFO
------- Additional Comments From nick@webthing.com 2006-08-08 21:50 -------
ISTR discussing this with someone recently. Was that you?
Does this happen during server operation, or is this at server shutdown?
And what backend and dbd-user modules are you using?
Any change with 2.2.3?
--
Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.
---------------------------------------------------------------------
To unsubscribe, e-mail: bugs-unsubscribe@httpd.apache.org
For additional commands, e-mail: bugs-help@httpd.apache.org
DO NOT REPLY [Bug 39985] - mod_dbd shutdown double free via dbd_close
Posted by bu...@apache.org.
DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG�
RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT
<http://issues.apache.org/bugzilla/show_bug.cgi?id=39985>.
ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND�
INSERTED IN THE BUG DATABASE.
http://issues.apache.org/bugzilla/show_bug.cgi?id=39985
chrisd@pearsoncmg.com changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|bugs@httpd.apache.org |chrisd@pearsoncmg.com
Status|NEEDINFO |ASSIGNED
------- Additional Comments From chrisd@pearsoncmg.com 2006-12-07 13:56 -------
Created an attachment (id=19226)
--> (http://issues.apache.org/bugzilla/attachment.cgi?id=19226&action=view)
Memory pool fixes for trunk.
These patches aim to prevent the following situation, which I suspect was
the cause of these bug reports. (I myself have rarely seen the problem,
so if someone who can replicate it reliably could try either of these patches,
that would be very helpful!)
When using a reslist, the reslist internally registers a cleanup function
on the memory pool used for the reslist, specifically the reslist_cleanup()
function. This function calls the destructor on each resource. For mod_dbd,
that destructor is dbd_destruct(), which just calls dbd_close(). Now
dbd_close() calls apr_pool_destroy() on the memory sub-pool that was
created in dbd_construct() for use by that particular DB connection; this
is where the connection's prepared statements are created.
Normally, we want this memory pool to be destroyed when dbd_destruct() or
dbd_close() is called -- suppose the reslist is expiring a resource, i.e.,
a DB connection, we want it to (a) close the DB connection and (b) reclaim
the memory used for that connection's prepared statements.
OK, but when the parent memory pool (the one used by the reslist itself)
is destroyed, apr_pool_destroy() first destroys all the sub-pools of that
pool -- in this case, these are the per-connection sub-pools. Then it calls
all the cleanup functions on the pool, including the reslist cleanup
function, which then calls dbd_destruct() on each connection, causes
apr_pool_destroy() to be called twice for each sub-pool and presumably
sometimes producing the segfaults people have reported.
Let me know if these patches fix the problem (and don't introduce new
problems!) and I'll commit the trunk version, and propose the fix for
2.2.x. Review of the no-threads logic would be especially helpful.
Thanks!
--
Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.
---------------------------------------------------------------------
To unsubscribe, e-mail: bugs-unsubscribe@httpd.apache.org
For additional commands, e-mail: bugs-help@httpd.apache.org
DO NOT REPLY [Bug 39985] - mod_dbd shutdown double free via dbd_close
Posted by bu...@apache.org.
DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG�
RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT
<http://issues.apache.org/bugzilla/show_bug.cgi?id=39985>.
ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND�
INSERTED IN THE BUG DATABASE.
http://issues.apache.org/bugzilla/show_bug.cgi?id=39985
poeml@suse.de changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #19228|0 |1
is obsolete| |
------- Additional Comments From poeml@suse.de 2007-01-20 12:20 -------
Created an attachment (id=19438)
--> (http://issues.apache.org/bugzilla/attachment.cgi?id=19438&action=view)
same thing for 2.2.x branch
--
Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.
---------------------------------------------------------------------
To unsubscribe, e-mail: bugs-unsubscribe@httpd.apache.org
For additional commands, e-mail: bugs-help@httpd.apache.org
DO NOT REPLY [Bug 39985] - mod_dbd shutdown double free via dbd_close
Posted by bu...@apache.org.
DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG�
RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT
<http://issues.apache.org/bugzilla/show_bug.cgi?id=39985>.
ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND�
INSERTED IN THE BUG DATABASE.
http://issues.apache.org/bugzilla/show_bug.cgi?id=39985
jorton@redhat.com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |chrisd@pearsoncmg.com
AssignedTo|chrisd@pearsoncmg.com |bugs@httpd.apache.org
Status|ASSIGNED |NEW
------- Additional Comments From jorton@redhat.com 2006-12-08 03:29 -------
Chris, please don't change the bug assignee field! It's the only way the bugs@
mailing list gets CCed on changes.
--
Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.
---------------------------------------------------------------------
To unsubscribe, e-mail: bugs-unsubscribe@httpd.apache.org
For additional commands, e-mail: bugs-help@httpd.apache.org
DO NOT REPLY [Bug 39985] - mod_dbd shutdown double free via dbd_close
Posted by bu...@apache.org.
DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG�
RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT
<http://issues.apache.org/bugzilla/show_bug.cgi?id=39985>.
ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND�
INSERTED IN THE BUG DATABASE.
http://issues.apache.org/bugzilla/show_bug.cgi?id=39985
------- Additional Comments From poeml@suse.de 2007-01-20 12:30 -------
I hope I got the backport right. It works for me, so far.
I didn't test other drivers than mysql, but I tried it with both prefork and worker.
My testcase is as described below.
The entire conf is:
--------------
User wwwrun
Group www
ErrorLog /var/log/apache2/error_log
Listen 81
DBDriver mysql
DBDParams "host=localhost, user=theuser, pass=thepass, dbname=thedbname"
<Directory /srv/www/htdocs/mysql-test>
AuthType Basic
AuthName "MySQL Testing"
AuthBasicProvider dbd
Require valid-user
AuthDBDUserPWQuery "select password from user where username=%s"
</Directory>
---------------
The server is built with the 2.2.4 tarball, and putting http://apache.webthing.com/svn/apache/apr/
apr_dbd_mysql.c into srclib/apr-util. In order to build the mysql driver, I used the following patch:
Index: build-outputs.mk
===============================================================
====
--- build-outputs.mk.orig 2006-11-29 12:48:46.000000000 +0100
+++ build-outputs.mk 2006-12-13 17:17:33.413014156 +0100
@@ -45,8 +45,9 @@ dbd/apr_dbd.lo: dbd/apr_dbd.c .make.dirs
dbd/apr_dbd_sqlite2.lo: dbd/apr_dbd_sqlite2.c .make.dirs
dbd/apr_dbd_sqlite3.lo: dbd/apr_dbd_sqlite3.c .make.dirs
dbd/apr_dbd_pgsql.lo: dbd/apr_dbd_pgsql.c .make.dirs
+dbd/apr_dbd_mysql.lo: dbd/apr_dbd_mysql.c .make.dirs include/apu_version.h
-OBJECTS_all = buckets/apr_buckets_pipe.lo buckets/apr_buckets_flush.lo buckets/
apr_buckets_alloc.lo buckets/apr_buckets_pool.lo buckets/apr_buckets_socket.lo buckets/
apr_buckets_heap.lo buckets/apr_buckets_simple.lo buckets/apr_buckets_file.lo buckets/
apr_buckets.lo buckets/apr_buckets_mmap.lo buckets/apr_buckets_eos.lo buckets/apr_brigade.lo
buckets/apr_buckets_refcount.lo crypto/apr_sha1.lo crypto/uuid.lo crypto/getuuid.lo crypto/
apr_md5.lo crypto/apr_md4.lo dbm/apr_dbm.lo dbm/apr_dbm_berkeleydb.lo dbm/apr_dbm_gdbm.lo
dbm/apr_dbm_ndbm.lo dbm/apr_dbm_sdbm.lo dbm/sdbm/sdbm_pair.lo dbm/sdbm/sdbm.lo dbm/
sdbm/sdbm_hash.lo dbm/sdbm/sdbm_lock.lo encoding/apr_base64.lo hooks/apr_hooks.lo ldap/
apr_ldap_url.lo ldap/apr_ldap_option.lo ldap/apr_ldap_init.lo misc/apr_reslist.lo misc/apu_version.lo
misc/apr_date.lo misc/apr_rmm.lo misc/apr_queue.lo uri/apr_uri.lo xml/apr_xml.lo strmatch/
apr_strmatch.lo xlate/xlate.lo dbd/apr_dbd.lo dbd/apr_dbd_sqlite2.lo dbd/apr_dbd_sqlite3.lo dbd/
apr_dbd_pgsql.lo
+OBJECTS_all = buckets/apr_buckets_pipe.lo buckets/apr_buckets_flush.lo buckets/
apr_buckets_alloc.lo buckets/apr_buckets_pool.lo buckets/apr_buckets_socket.lo buckets/
apr_buckets_heap.lo buckets/apr_buckets_simple.lo buckets/apr_buckets_file.lo buckets/
apr_buckets.lo buckets/apr_buckets_mmap.lo buckets/apr_buckets_eos.lo buckets/apr_brigade.lo
buckets/apr_buckets_refcount.lo crypto/apr_sha1.lo crypto/uuid.lo crypto/getuuid.lo crypto/
apr_md5.lo crypto/apr_md4.lo dbm/apr_dbm.lo dbm/apr_dbm_berkeleydb.lo dbm/apr_dbm_gdbm.lo
dbm/apr_dbm_ndbm.lo dbm/apr_dbm_sdbm.lo dbm/sdbm/sdbm_pair.lo dbm/sdbm/sdbm.lo dbm/
sdbm/sdbm_hash.lo dbm/sdbm/sdbm_lock.lo encoding/apr_base64.lo hooks/apr_hooks.lo ldap/
apr_ldap_url.lo ldap/apr_ldap_option.lo ldap/apr_ldap_init.lo misc/apr_reslist.lo misc/apu_version.lo
misc/apr_date.lo misc/apr_rmm.lo misc/apr_queue.lo uri/apr_uri.lo xml/apr_xml.lo strmatch/
apr_strmatch.lo xlate/xlate.lo dbd/apr_dbd.lo dbd/apr_dbd_sqlite2.lo dbd/apr_dbd_sqlite3.lo dbd/
apr_dbd_pgsql.lo dbd/apr_dbd_mysql.lo
OBJECTS_unix = $(OBJECTS_all)
Then I did
./configure --enable-dbd --enable-authn_dbd --with-included-apr && \
make && make install
The database account data must be valid.
In order to reproduce the bug, I used the commands
/usr/local/apache2/bin/httpd
kill $(cat /usr/local/apache2/logs/httpd.pid)
--
Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.
---------------------------------------------------------------------
To unsubscribe, e-mail: bugs-unsubscribe@httpd.apache.org
For additional commands, e-mail: bugs-help@httpd.apache.org
DO NOT REPLY [Bug 39985] - mod_dbd shutdown double free via dbd_close
Posted by bu...@apache.org.
DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG�
RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT
<http://issues.apache.org/bugzilla/show_bug.cgi?id=39985>.
ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND�
INSERTED IN THE BUG DATABASE.
http://issues.apache.org/bugzilla/show_bug.cgi?id=39985
------- Additional Comments From mkent@magoazul.com 2006-07-06 23:44 -------
Created an attachment (id=18565)
--> (http://issues.apache.org/bugzilla/attachment.cgi?id=18565&action=view)
gdb session
attaching to a running thread and sending it a SIGTERM
--
Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.
---------------------------------------------------------------------
To unsubscribe, e-mail: bugs-unsubscribe@httpd.apache.org
For additional commands, e-mail: bugs-help@httpd.apache.org
DO NOT REPLY [Bug 39985] - mod_dbd shutdown double free via dbd_close
Posted by bu...@apache.org.
DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG�
RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT
<http://issues.apache.org/bugzilla/show_bug.cgi?id=39985>.
ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND�
INSERTED IN THE BUG DATABASE.
http://issues.apache.org/bugzilla/show_bug.cgi?id=39985
------- Additional Comments From mkent@magoazul.com 2006-08-09 18:36 -------
Don't think it was me, I've never discussed this outside of this ticket.
- The problem happens during shutdown.
- I'm using a current copy of the apr_dbd_mysql.c backend compiled against MySQL
4.1.20
- I'm using a copy of mod_vhost_dbi modified to work with dbd instead. But the
problem happens regardless of what modules are loaded. I can run a single thread
with the bare minimum (no 3rd party modules or my own) and reproduce the problem.
- Just retested on 2.2.3 and got the same result.
--
Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.
---------------------------------------------------------------------
To unsubscribe, e-mail: bugs-unsubscribe@httpd.apache.org
For additional commands, e-mail: bugs-help@httpd.apache.org
DO NOT REPLY [Bug 39985] - mod_dbd shutdown double free via dbd_close
Posted by bu...@apache.org.
DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG�
RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT
<http://issues.apache.org/bugzilla/show_bug.cgi?id=39985>.
ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND�
INSERTED IN THE BUG DATABASE.
http://issues.apache.org/bugzilla/show_bug.cgi?id=39985
chrisd@pearsoncmg.com changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #19227|0 |1
is obsolete| |
------- Additional Comments From chrisd@pearsoncmg.com 2006-12-09 21:54 -------
Created an attachment (id=19238)
--> (http://issues.apache.org/bugzilla/attachment.cgi?id=19238&action=view)
catch some error condition leaks in dbd_construct
--
Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.
---------------------------------------------------------------------
To unsubscribe, e-mail: bugs-unsubscribe@httpd.apache.org
For additional commands, e-mail: bugs-help@httpd.apache.org
DO NOT REPLY [Bug 39985] - mod_dbd shutdown double free via dbd_close
Posted by bu...@apache.org.
DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG�
RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT
<http://issues.apache.org/bugzilla/show_bug.cgi?id=39985>.
ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND�
INSERTED IN THE BUG DATABASE.
http://issues.apache.org/bugzilla/show_bug.cgi?id=39985
------- Additional Comments From oakad@yahoo.com 2006-12-03 22:37 -------
I also think that this bug does not turns up more often because of the fact
that junk value in apr_dbd_t->conn is most often NULL, so it gets silently
eaten by the mysql_close (for example). This even happens with pool debug
enabled (and pools are supposed to be poisoned); httpd -X is a safe way to
trigger a real fault.
--
Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.
---------------------------------------------------------------------
To unsubscribe, e-mail: bugs-unsubscribe@httpd.apache.org
For additional commands, e-mail: bugs-help@httpd.apache.org
DO NOT REPLY [Bug 39985] - mod_dbd shutdown double free via dbd_close
Posted by bu...@apache.org.
DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG�
RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT
<http://issues.apache.org/bugzilla/show_bug.cgi?id=39985>.
ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND�
INSERTED IN THE BUG DATABASE.
http://issues.apache.org/bugzilla/show_bug.cgi?id=39985
------- Additional Comments From chrisd@pearsoncmg.com 2006-12-06 22:34 -------
Yes, I'd spotted that as well and might have a patch tomorrow that
addresses the issue -- ping me if I'm slow!
--
Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.
---------------------------------------------------------------------
To unsubscribe, e-mail: bugs-unsubscribe@httpd.apache.org
For additional commands, e-mail: bugs-help@httpd.apache.org
DO NOT REPLY [Bug 39985] - mod_dbd shutdown double free via dbd_close
Posted by bu...@apache.org.
DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG�
RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT
<http://issues.apache.org/bugzilla/show_bug.cgi?id=39985>.
ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND�
INSERTED IN THE BUG DATABASE.
http://issues.apache.org/bugzilla/show_bug.cgi?id=39985
poeml@suse.de changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |poeml@suse.de
--
Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.
---------------------------------------------------------------------
To unsubscribe, e-mail: bugs-unsubscribe@httpd.apache.org
For additional commands, e-mail: bugs-help@httpd.apache.org
DO NOT REPLY [Bug 39985] - mod_dbd shutdown double free via dbd_close
Posted by bu...@apache.org.
DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG�
RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT
<http://issues.apache.org/bugzilla/show_bug.cgi?id=39985>.
ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND�
INSERTED IN THE BUG DATABASE.
http://issues.apache.org/bugzilla/show_bug.cgi?id=39985
------- Additional Comments From oakad@yahoo.com 2006-12-03 22:29 -------
I can verify this bug (httpd-2.2.3). It appears that pool that hosts apr_dbd_t
struct (the one passed to apr_dbd_open) gets destroyed before the apr_dbd_close
is run. Easy to verify with "httpd -X" and gdb by setting watch value to look
at apr_dbd_t.
--
Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.
---------------------------------------------------------------------
To unsubscribe, e-mail: bugs-unsubscribe@httpd.apache.org
For additional commands, e-mail: bugs-help@httpd.apache.org
DO NOT REPLY [Bug 39985] - mod_dbd shutdown double free via dbd_close
Posted by bu...@apache.org.
DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG�
RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT
<http://issues.apache.org/bugzilla/show_bug.cgi?id=39985>.
ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND�
INSERTED IN THE BUG DATABASE.
http://issues.apache.org/bugzilla/show_bug.cgi?id=39985
------- Additional Comments From nick@webthing.com 2006-08-09 19:38 -------
OK, there's clearly a genuine bug here, though I'm struggling to see it in the
mod_dbd code (which leads me to wonder about either the pools or - more
likely - the mysql driver). Bug me if nothing happens on this.
Has anyone seen this bug with derivers other than MySQL?
--
Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.
---------------------------------------------------------------------
To unsubscribe, e-mail: bugs-unsubscribe@httpd.apache.org
For additional commands, e-mail: bugs-help@httpd.apache.org
DO NOT REPLY [Bug 39985] - mod_dbd shutdown double free via dbd_close
Posted by bu...@apache.org.
DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG�
RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT
<http://issues.apache.org/bugzilla/show_bug.cgi?id=39985>.
ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND�
INSERTED IN THE BUG DATABASE.
http://issues.apache.org/bugzilla/show_bug.cgi?id=39985
------- Additional Comments From poeml@suse.de 2007-04-23 14:31 -------
Meanwhile, I run the trunk version of mod_dbd.c (r531611) with 2.2, which works fine for me.
--
Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.
---------------------------------------------------------------------
To unsubscribe, e-mail: bugs-unsubscribe@httpd.apache.org
For additional commands, e-mail: bugs-help@httpd.apache.org
DO NOT REPLY [Bug 39985] - mod_dbd shutdown double free via dbd_close
Posted by bu...@apache.org.
DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG�
RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT
<http://issues.apache.org/bugzilla/show_bug.cgi?id=39985>.
ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND�
INSERTED IN THE BUG DATABASE.
http://issues.apache.org/bugzilla/show_bug.cgi?id=39985
------- Additional Comments From chrisd@pearsoncmg.com 2006-12-28 14:57 -------
The patches attached so far don't completely solve all the problems
identified in the report. For the latest, see the first three patches
(1tidy, 2misc, and 3pools) for httpd trunk in:
http://people.apache.org/~chrisd/patches/mod_dbd_pools_groups/
These should be applied sequentially. The third (3pools) patch is the one
that actually addresses the original issue from this report. It makes use
of the fact that MPMs (should) call apr_pool_destroy() on the pool they
pass to the child_init hook functions, when each child process exits. However,
they don't call apr_pool_destroy() on s->process->pool in child processes.
This allows us to work around the interaction of APR reslists and memory
pools at pool destruction time.
--
Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.
---------------------------------------------------------------------
To unsubscribe, e-mail: bugs-unsubscribe@httpd.apache.org
For additional commands, e-mail: bugs-help@httpd.apache.org
DO NOT REPLY [Bug 39985] - mod_dbd shutdown double free via dbd_close
Posted by bu...@apache.org.
DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG�
RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT
<http://issues.apache.org/bugzilla/show_bug.cgi?id=39985>.
ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND�
INSERTED IN THE BUG DATABASE.
http://issues.apache.org/bugzilla/show_bug.cgi?id=39985
chrisd@pearsoncmg.com changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
--
Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.
---------------------------------------------------------------------
To unsubscribe, e-mail: bugs-unsubscribe@httpd.apache.org
For additional commands, e-mail: bugs-help@httpd.apache.org
DO NOT REPLY [Bug 39985] - mod_dbd shutdown double free via dbd_close
Posted by bu...@apache.org.
DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG�
RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT
<http://issues.apache.org/bugzilla/show_bug.cgi?id=39985>.
ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND�
INSERTED IN THE BUG DATABASE.
http://issues.apache.org/bugzilla/show_bug.cgi?id=39985
------- Additional Comments From oakad@yahoo.com 2006-12-06 22:12 -------
It appears that this problem is caused by pool destruction on line 316 in
mod_dbd.c:
---
apr_pool_destroy(conn->pool);
---
The pool in question may be (as it happens on my machine) already destroyed by
its parent (I'm using mpm_prefork - have to try yet with mpm_worker).
Commenting this line out seems to solve the problem and database handle is
still closed (or at least it appears that way).
--
Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.
---------------------------------------------------------------------
To unsubscribe, e-mail: bugs-unsubscribe@httpd.apache.org
For additional commands, e-mail: bugs-help@httpd.apache.org