Bug #64511 [Com]: Strange memory allocation error message spamming

Edit report at https://bugs.php.net/bug.php?id=64511&edit=1 ID: 64511 Comment by: gordon dot stratton at gmail dot com Reported by: psiek at mscgva dot ch Summary: Strange memory allocation error message spamming Status: Open Type: Bug Package: MSSQL related Operating System: ubuntu 12.10 PHP Version: 5.4.13 Block user comment: N Private report: N New Comment: We experienced this problem on PHP 5.4.4, but it was fixed by upgrading to 5.4.21. Previous Comments: ------------------------------------------------------------------------ [2013-07-31 14:30:42] psiek at mscgva dot ch Hi, I just added memory_get_usage and memory_get_peak_usage to my script and here is the result: [31-Jul-2013 16:20:56 Europe/Zurich] Script start [31-Jul-2013 16:20:56 Europe/Zurich] Memory Get Usage: 524288 [31-Jul-2013 16:20:56 Europe/Zurich] Memory Peak Usage: 524288 [31-Jul-2013 16:20:56 Europe/Zurich] Script end [31-Jul-2013 16:20:56 Europe/Zurich] PHP Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 140188914343656 bytes) in Unknown on line 0 The problem comes after script execution. Perhaps there is a problem with freeing object in memory? Any idea? ------------------------------------------------------------------------ [2013-07-31 01:33:32] yohgaki@php.net [Mon Mar 25 08:53:55 2013] [error] [client x.x.x.x] PHP Fatal error: Allowed memory size of 536870912 bytes exhausted (tried to allocate 140429927214120 bytes) in Unknown on line 0, referer: This log indicates that you have been exhausted available memory. (512MB) When you get query result from your db server, records are stored in memory which is not managed by PHP. If you do do { $rowset = $query->fetchAll(PDO::FETCH_ASSOC); if ($rowset) { $RecordsetFields[] = $rowset; } } while ($query->nextRowset()); Then results are stored in PHP managed memory. I wander why your script works(?) even with the memory exhaustion error. Are you sure that query result fit in your PHP managed memory? How many records are there? and what the size of each record? Could you use memory_get_usage() http://jp2.php.net/manual/en/function.memory-get-usage.php in the "do" loop to see memory usage of your script and report the result back? ------------------------------------------------------------------------ [2013-03-27 11:06:50] psiek at mscgva dot ch Hi, Thanks for your reply. Here is a sample code that reproduce the error. Please note that sometimes this code not generate the error, and I can't find why. When you reload the page, it mostly generated but a few time not. <?php $connection = new PDO('dblib:dbname=xxx;host=yyy;', 'zxzxzx', 'zxzxzx'); $connection->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); $query = $connection->query("xxx.dbo.zzzzz @ServerName = NULL, @ProcessName = NULL, @LayoutID = NULL"); $RecordsetFields = array(); do { $rowset = $query->fetchAll(PDO::FETCH_ASSOC); if ($rowset) { $RecordsetFields[] = $rowset; } } while ($query->nextRowset()); print_r($RecordsetFields); The query is working perfectly, excepted the message in error.log. This is anoyong because we are monitoring errors in real time and this is generating 99% of false positives. Once again, thanks for your help. Regards, ------------------------------------------------------------------------ [2013-03-26 16:31:38] laruence@php.net Thank you for this bug report. To properly diagnose the problem, we need a short but complete example script to be able to reproduce this bug ourselves. A proper reproducing script starts with <?php and ends with ?>, is max. 10-20 lines long and does not require any external resources such as databases, etc. If the script requires a database to demonstrate the issue, please make sure it creates all necessary tables, stored procedures etc. Please avoid embedding huge scripts into the report. ------------------------------------------------------------------------ [2013-03-25 14:09:57] psiek at mscgva dot ch Description: ------------ Hi, Each time I use dblib + freetds (read or write) I got following messages : [Mon Mar 25 08:53:55 2013] [error] [client x.x.x.x] PHP Fatal error: Allowed memory size of 536870912 bytes exhausted (tried to allocate 140429927214120 bytes) in Unknown on line 0, referer: http://blahblah All seems to work, excepted the weird message that fill my logs. I tryed with multiple versions of php (from 5.4.0 up to 5.4.11) on three different servers, they all give the same message. Regards, Expected result: ---------------- No error message in error/php log Actual result: -------------- [Mon Mar 25 08:53:55 2013] [error] [client x.x.x.x] PHP Fatal error: Allowed memory size of 536870912 bytes exhausted (tried to allocate 140429927214120 bytes) in Unknown on line 0, referer: http://blahblah ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=64511&edit=1