From: jake dot levitt at mailtrust dot com
Operating system: Ubuntu 8.04 (linux:2.6.24-21)
PHP version: 5.2.9
PHP Bug Type: Reproducible crash
Bug description: imap_body causes memory leak
Description:
------------
I am creating a script that migrates e-mail from one server to another.
On really large mailboxes, my script dies with "PHP Fatal error: Out of
memory (allocated 13631488) (tried to allocate 3381512 bytes)" even though
memory_get_usage() function was reporting that the script was only using
around 10 MBs. My memory_limit is set to 1GB (but this isn't coming into
play). When I examined the memory usage of the script using ps, I noticed
that it would gradually increase until it reached ~92% of system memory (I
have 2GB). I eventually found that when I commented out imap_body, the
memory usage would stay flat. I wrote a script that can reproduce this
bug. I run the script in the background and then watch its memory using:
ps -eo pid,ppid,rss,vsize,pcpu,pmem,cmd -ww --sort=pid | grep
"\(memory-usage\)\|\(PID\)" | grep -v grep. Please let me know if you need
additional information. This script is intended to be run on the cli.
Reproduce code:
---------------
<?php
$flags = '/novalidate-cert';
$host = 'mail.server.com:143';
$username = 'user';
$password = 'pass';
$folder = 'INBOX';
$base_imap_string = '{' . $host . $flags . '}';
$connect_string = $base_imap_string . $folder;
$mailbox = @imap_open($connect_string, $username, $password, 0, 3);
$reopen_success = imap_reopen($mailbox, $connect_string, 0, 3);
$message_ids = imap_search($mailbox, "ALL", SE_UID);
for ($i = 0; $i < 10000000; $i++) {
imap_body($mailbox, $message_ids[0], FT_UID | FT_PEEK);
}
Expected result:
----------------
I would expect that memory usage as viewed by the ps command stays
relatively flat.
Actual result:
--------------
Memory usage as viewed by the ps command increases over time until the
script eventually dies with an "out of memory" error given.
--
Edit bug report at http://bugs.php.net/?id=47940&edit=1
--
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=47940&r=trysnapshot52
Try a CVS snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=47940&r=trysnapshot53
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=47940&r=trysnapshot60
Fixed in CVS:
http://bugs.php.net/fix.php?id=47940&r=fixedcvs
Fixed in CVS and need be documented:
http://bugs.php.net/fix.php?id=47940&r=needdocs
Fixed in release:
http://bugs.php.net/fix.php?id=47940&r=alreadyfixed
Need backtrace:
http://bugs.php.net/fix.php?id=47940&r=needtrace
Need Reproduce Script:
http://bugs.php.net/fix.php?id=47940&r=needscript
Try newer version:
http://bugs.php.net/fix.php?id=47940&r=oldversion
Not developer issue:
http://bugs.php.net/fix.php?id=47940&r=support
Expected behavior:
http://bugs.php.net/fix.php?id=47940&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=47940&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=47940&r=submittedtwice
register_globals:
http://bugs.php.net/fix.php?id=47940&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=47940&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=47940&r=dst
IIS Stability:
http://bugs.php.net/fix.php?id=47940&r=isapi
Install GNU Sed:
http://bugs.php.net/fix.php?id=47940&r=gnused
Floating point limitations:
http://bugs.php.net/fix.php?id=47940&r=float
No Zend Extensions:
http://bugs.php.net/fix.php?id=47940&r=nozend
MySQL Configuration Error:
http://bugs.php.net/fix.php?id=47940&r=mysqlcfg
