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[cc-devel] [ cctools-Bugs-2728181 ] Race condition in uploads
- From: "SourceForge.net" <noreply AT sourceforge.net>
- To: noreply AT sourceforge.net
- Subject: [cc-devel] [ cctools-Bugs-2728181 ] Race condition in uploads
- Date: Fri, 03 Apr 2009 12:22:54 +0000
Bugs item #2728181, was opened at 2009-04-03 14:22
Message generated for change (Tracker Item Submitted) made by mafu_
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Category: cchost
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Markus (mafu_)
Assigned to: Victor Stone (fourstones)
Summary: Race condition in uploads
Initial Comment:
When multiple users upload media at the same time, it's possible that a race
conditions occurs. The problem lies with the NextID()-method in the class
CCTable , which simply gets the next available auto_increment from the
database. So if two users call NextID() concurrently, they get the same ID
back, but only one can insert into the database with that ID -- the other
user gets a MySQL error about a duplicate entry.
We have currently fixed this with a hack, locking the required tables before
the insert (in cc-uploadapi.php), but really the row should be inserted
first, the ID gotten with mysql_insert_id, which can then be used in the rest
of the code.
Regards
----------------------------------------------------------------------
You can respond by visiting:
https://sourceforge.net/tracker/?func=detail&atid=559966&aid=2728181&group_id=80503
-
[cc-devel] [ cctools-Bugs-2728181 ] Race condition in uploads,
SourceForge.net, 04/03/2009
- <Possible follow-up(s)>
- [cc-devel] [ cctools-Bugs-2728181 ] Race condition in uploads, SourceForge.net, 04/22/2009
- [cc-devel] [ cctools-Bugs-2728181 ] Race condition in uploads, SourceForge.net, 04/22/2009
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