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Bug 9410 - Out of memory in diff


Summary:	Out of memory in diff

Status:	RESOLVED DUPLICATE of bug 7601

Product:	Wikimedia
Classification:	Unclassified
Component:	General/Unknown (Other open bugs)
Version:	unspecified
Hardware:	PC Windows XP

Importance:	Normal normal with 4 votes (vote)
Target Milestone:	---
Assigned To:	Nobody - You can work on this!

URL:	http://en.wikipedia.org/wiki/Wikipedi...
Whiteboard:
Keywords:

Depends on:
Blocks:
	Show dependency tree / graph

Reported:	2007-03-24 17:04 UTC by Jayden54
Modified:	2010-05-21 19:51 UTC (History)
CC List:	5 users (show)

See Also:
Web browser:	---
Mobile Platform:	---
Assignee Huggle Beta Tester:	---

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Description Jayden54 2007-03-24 17:04:30 UTC

It seems that the diff engine doesn't work when really large changes are made. 

The following diff demonstrates this problem:
http://en.wikipedia.org/w/index.php?title=Sanskrit&diff=117546265&oldid=117458836

If you look at the diff it appears as if no changes at all have been made, but
in reality around 64,000 characters were removed. Obviously something is wrong
as a message is also displayed: "Out of memory in diff."

Comment 1 nryan 2007-03-29 00:39:12 UTC

It's now occurring with small changes also:

http://en.wikipedia.org/w/index.php?title=Criticism_of_Islam&curid=2394308&diff=118645774&oldid=118547252

Comment 2 Hesperian 2007-03-29 13:36:59 UTC

Don't know if this helps, but here's another example where only one character
was changed:
http://en.wikipedia.org/w/index.php?title=Surat_Basin&diff=next&oldid=117464012

Comment 3 Tim Starling 2007-03-29 17:34:47 UTC

The changes are not really large. Those diffs would only require a few hundred
KB. The problem is probably that some servers (srv51, srv69, srv103) are
swapping and are probably experiencing transient out of memory conditions.

Comment 4 Thomas Goldammer 2008-02-16 20:10:56 UTC

Hoi. Found a new one outside enwiki: http://de.wikipedia.org/w/index.php?title=Wikipedia:Entsperrw%C3%BCnsche&diff=prev&oldid=42600173

Comment 5 Bryan Baron 2009-09-23 20:29:12 UTC

I can't reproduce this. This bug is very old and looks like sporadic server problems. WORKSFORME?

Comment 6 Chad H. 2010-05-21 19:51:20 UTC


*** This bug has been marked as a duplicate of bug 7601 ***

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