[asterisk-bugs] [Asterisk 0015023]: [patch] Bad locking logic on res_config_mysql.c

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
====================================================================== 
https://issues.asterisk.org/view.php?id=15023 
====================================================================== 
Reported By:                cristiandimache
Assigned To:                tilghman
====================================================================== 
Project:                    Asterisk
Issue ID:                   15023
Category:                   Addons/res_config_mysql
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     feedback
Asterisk Version:           1.6.1.0 
Regression:                 No 
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
====================================================================== 
Date Submitted:             2009-05-03 14:09 CDT
Last Modified:              2009-05-14 09:01 CDT
====================================================================== 
Summary:                    [patch] Bad locking logic on res_config_mysql.c
Description: 
store_mysql calls find_database(), which locks the database handle.
Then, it calls internal_require(), which calls require_mysql(), which
calls find_table(), which calls find_database(), thus requesting a new lock
on the database handle.
I could be wrong in the call chain, but the result is always the same:
Asterisk stops waiting for a lock to be released.
======================================================================
Relationships       ID      Summary
----------------------------------------------------------------------
related to          0015090 chan_sip random deadlock
====================================================================== 

---------------------------------------------------------------------- 
 (0104728) tilghman (administrator) - 2009-05-14 09:01
 https://issues.asterisk.org/view.php?id=15023#c104728 
---------------------------------------------------------------------- 
Patch uploaded.  Found with a 'core show locks' in related issue
https://issues.asterisk.org/view.php?id=15090. 
Please test and verify. 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2009-05-14 09:01 tilghman       Note Added: 0104728                          
======================================================================