Bug #52249 [Opn->Fbk]: Connection not closed on thrown exception, E_ERROR

From: Date: Mon, 05 Jul 2010 10:00:59 +0000
Subject: Bug #52249 [Opn->Fbk]: Connection not closed on thrown exception, E_ERROR
References: 1  Groups: php.bugs 
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Edit report at http://bugs.php.net/bug.php?id=52249&edit=1

 ID:               52249
 Updated by:       pajoye@php.net
 Reported by:      dinumarina at gmail dot com
 Summary:          Connection not closed on thrown exception, E_ERROR
-Status:           Open
+Status:           Feedback
 Type:             Bug
 Package:          MySQLi related
 Operating System: CentOs
 PHP Version:      Irrelevant

 New Comment:

If you are in a hurry, then test it with a decent version (5.2.13 or
5.2.14RC2, 5.3.2 or 5.3.3RC2).


Previous Comments:
------------------------------------------------------------------------
[2010-07-05 11:39:35] dinumarina at gmail dot com

Hi, 
Do you expect it will fix it or just for test? I'm really pressed with
time.

------------------------------------------------------------------------
[2010-07-05 10:18:18] johannes@php.net

Please try using this snapshot:

  http://snaps.php.net/php5.3-latest.tar.gz
 
For Windows:

  http://windows.php.net/snapshots/

------------------------------------------------------------------------
[2010-07-05 09:47:18] dinumarina at gmail dot com

Description:
------------
PHP version is 5.1.6 I haven't had the chance to run on newer versions
but I suspect it's a persistent structural bug; What happens is MySQLi
connection is not closed when script ends if it terminates due to a
raised exception or an E_ERROR. This causes a number of problems from
filling connection pool (mild) to blocking transactions (severe). The
connection is never closed until reset by mysql server. For exceptions,
there is the workaround of manually closing the connection in a default
exception handler, but for E_ERROR I couldn't find any closing protocol.
If this has been fixed in the later releases please be so kind to ignore
this. However I suspect otherwise since I could find no discussions
related to this. At the moment I don't have time to test with another
release.

Test script:
---------------
mysqli_connect($db_host,$db_user,$db_password);
throw new Exception();

Expected result:
----------------
When a script terminates (especially when crashed) all resources should
be freed: all open handles, tcp connections, etc. I realize there is a
problem with persistent connection handling, but a way should be found
to clean up the mess; otherwise one script can trash the whole server by
blocking transactions.

Actual result:
--------------
Connection lingers.


------------------------------------------------------------------------



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