Tickets :: [#8379] High CPU utilization watching HTML messages

6.0.0-beta1

7/19/25

Summary	High CPU utilization watching HTML messages
Queue	DIMP
Queue Version	FRAMEWORK_3
Type	Bug
State	Not A Bug
Priority	1. Low
Owners
Requester	jan (at) horde (dot) org
Created	06/26/2009 (5867 days ago)
Due
Updated	07/13/2009 (5850 days ago)
Assigned
Resolved	07/13/2009 (5850 days ago)
Github Issue Link
Github Pull Request
Milestone
Patch	No

07/13/2009 10:12:28 AM	Jan Schneider	Comment #10 Taken from Michael Slusarz Taken from Jan Schneider State ⇒ Not A Bug	Reply to this comment
Turns out that this is due to the PHP-based JSON encoding, namely the preg_match_all() call when encoding strings.

07/07/2009 09:22:10 PM	Michael Slusarz	Comment #9	Reply to this comment
Jan's issue dealt with FW_3 - once he gets back, hopefully he'll be able to track this down a bit more.

07/07/2009 09:17:55 PM	Chuck Hagenbuch	Comment #8	Reply to this comment
Basically confirmed; the issue I saw is much much better after another pull.

07/07/2009 09:12:07 PM	Michael Slusarz	Comment #7	Reply to this comment
In the latest git IMP, as of today, I am now seeing HTML message not loading at all (maybe they'd complete after a long time) in the preview. If I open them in a separate window, it works. So there might be an issue with the difference (separate window vs. not?). This was not a problem for me until today's git updates for the Cleanhtml filters and related. This was likely due to a charset issue that was resolved earlier today.

07/07/2009 08:24:36 PM	Chuck Hagenbuch	Comment #6	Reply to this comment
In the latest git IMP, as of today, I am now seeing HTML message not loading at all (maybe they'd complete after a long time) in the preview. If I open them in a separate window, it works. So there might be an issue with the difference (separate window vs. not?). This was not a problem for me until today's git updates for the Cleanhtml filters and related.

06/26/2009 05:46:20 PM	Michael Slusarz	Comment #5	Reply to this comment
I don't see this. That message loads instantaneously in Git, and slightly slower (maybe a second or so) on FW_3. I am using tidy, although disabling in Git doesn't seem to affect loadspeed at all. But no crushing CPU utilization seen for me.

06/26/2009 01:34:29 PM	Jan Schneider	Summary ⇒ High CPU utilization watching HTML messages

06/26/2009 01:34:04 PM	Jan Schneider	Comment #4	Reply to this comment
Disabling the session handler doesn't change the CPU problem, but at least it doesn't log me out anymore. Both issues have to tracked separately.

06/26/2009 01:21:46 PM	Jan Schneider	Comment #3 New Attachment: heise online News 25.06.2009.eml	Reply to this comment
For the record, this also happens with loading the message in the preview, though the session doesn't time out. Attached is an example HTML message.

06/26/2009 01:17:26 PM	Jan Schneider	Comment #2	Reply to this comment
Maybe not a DIMP issue. Not sure if this is symptom or root of the problem, but I just noticed that I have the mysql session handler configured, probably for debugging reasons. This is what I get in the log: Jun 26 15:11:06 HORDE [error] [horde] Error retrieving session data (id = 6a119572ade9652e716a388de9afc4fc): Lock wait timeout exceeded; try restarting transaction [pid 31607 on line 144 of "/srv/www/htdocs/horde/framework/SessionHandler/SessionHandler/mysql.php"] Jun 26 15:15:09 HORDE [notice] [imp] 201.7.142.10 Ihre Webmail-Session ist abgelaufen. Bitte melden Sie sich erneut an. [pid 31622 on line 67 of "/srv/www/htdocs/horde/imp/login.php"] Jun 26 15:15:10 HORDE [notice] [imp] Session timeout for client [201.7.142.10] [pid 31622 on line 102 of "/srv/www/htdocs/horde/imp/login.php"]

06/26/2009 01:14:57 PM	Jan Schneider	Comment #1 State ⇒ Feedback Patch ⇒ No Milestone ⇒ Assigned to Michael Slusarz Assigned to Jan Schneider Queue ⇒ DIMP Summary ⇒ High CPU utilization watching HTML messages in a popup Type ⇒ Bug Priority ⇒ 1. Low	Reply to this comment
This is to track a problem I noticed that I can't track down any further at the moment. When viewing some HTML messages in a popup that otherwise render fine in plain IMP, causes a high CPU load on the server and eventually log me out of the session.