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Bug #24313

closed

Circular dependency in gm

Added by Jrgen Ladsttter almost 14 years ago. Updated about 6 years ago.

Status:
Closed
Priority:
Should have
Assignee:
Jigal van Hemert
Category:
-
Target version:
-
Start date:
2010-12-09
Due date:
% Done:

0%

Estimated time:
TYPO3 Version:
4.3
PHP Version:
5.2
Tags:
Complexity:
Is Regression:
Sprint Focus:

Description

We have a high traffic typo3 page that is within a multi node cluster, each cluster sharing a common device via iSCSI and a network file system.

Randomly (from 1x within 48 hours to 4x a day), one node hangs because GM is taking 100% cpu power. the node gets fenced (rebooted) by other nodes to make the network file system clear (its a security mechanism from ocfs2).

I was lucky to catch a shot at ps aux:
typo3 856 0.0 0.0 53484 2444 ? D 14:28 0:00 /usr/bin/gm convert +profile * typo3temp/pics/ob4_4d563cbc2c.gif typo3temp/pics/ob4_4d563cbc2c.gif
typo3 857 99.2 0.0 53340 2196 ? R 14:28 0:55 /usr/bin/gm convert +profile * typo3temp/pics/ob4_4d563cbc2c.gif typo3temp/pics/ob4_4d563cbc2c.gif

Network filesystems have a very hard policy on locking and thats imho why the circular dependency in the second case is hanging gm. Readlock and writelock on the same file doesnt really make sense.
Can this be a typo3 bug in the specified version? Is there any work around for this?

safe_mode = off
os = gentoo
typo3 = 4.3
gm = 1.3.12
php = 5.2.12
(issue imported from #M16707)

Files

Download all files
16707_4-3.patch (1.09 KB) 16707_4-3.patch Administrator Admin, 2010-12-12 10:10
16707.patch (1.11 KB) 16707.patch Administrator Admin, 2010-12-12 10:10
16707_4-4.patch (1.09 KB) 16707_4-4.patch Administrator Admin, 2010-12-12 21:05
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