Bug #39582 [Asn->Opn]: Connection problems after SQL error
Edit report at https://bugs.php.net/bug.php?id=39582&edit=1
ID: 39582
Updated by: kalle@php.net
Reported by: lars dot roessiger at gmail dot com
Summary: Connection problems after SQL error
-Status: Assigned
+Status: Open
Type: Bug
Package: MSSQL related
Operating System: Windows Server 2003
PHP Version: 5.2.0
-Assigned To: fmk
+Assigned To:
Block user comment: N
Private report: N
Previous Comments:
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[2006-11-22 10:11:35] lars dot roessiger at gmail dot com
The "hanging script"-problem only occurs when connecting via NETBIOS. When I connect to
the server via TCP/IP, it does not hang.
However, I'm still getting "Unable to select database" when an SQL error occurs when
connecting via mssql_pconnect().
------------------------------------------------------------------------
[2006-11-22 09:56:50] lars dot roessiger at gmail dot com
Tried to reproduce the problem on Linux with FreeTDS:
"Unable to select database" with mssql_pconnect().
No problems with mssql_connect(). Error handler properly finishes.
------------------------------------------------------------------------
[2006-11-22 09:35:16] lars dot roessiger at gmail dot com
Description:
------------
Unexpected behaviour when SQL queries fail.
Reproduce code:
---------------
<?
$db_host = "";
$db_user = "";
$db_pass = "";
$db_base = "";
function error_handler($errno, $errmsg)
{
echo $errmsg;
exit(1);
}
// script will hang on sql error
$dbconn = mssql_connect($db_host, $db_user, $db_pass);
// refreshes will cause sql server to refuse selection of db
//$dbconn = mssql_pconnect($db_host, $db_user, $db_pass);
mssql_select_db($db_base, $dbconn);
error_reporting(0);
set_error_handler("error_handler");
if($_GET['error'] == "plain")
trigger_error("Error", E_USER_ERROR); // produce error
else if($_GET['error'] == "sql")
mssql_query("SELECT asdf FROM asdf"); // produce sql error
?>
Expected result:
----------------
mssql_connect(): On SQL error the script should not hang but finish.
mssql_pconnect(): On SQL error further connection requests should not fail.
Actual result:
--------------
If an SQL error occurs, database connections established with mssql_pconnect() get lost. New
connection requests fail with "mssql_select_db() [function.mssql-select-db]: Unable to select
database".
When using mssql_connect() instead of mssql_pconnect(), execution of the resp. PHP script will hang
(up to 5 minutes). The error handler will finish its job, but PHP does not close the connection to
the browser - it keeps "loading" (although no data is being sent anymore).
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