*****SETUP*****
- Windows 2008 Server Standard Edition (64-bit)
- IIS 7
- ActiveState ActivePerl - 5.8.9.825 (32-bit)
- MySQL Server - 5.0.51a
- MovableType 4.261-en
- http://www.hoyty.com/MovType/mt-check.cgi
******************
I am having a very similar problem to one a friend of mine had as documented in http://forums.movabletype.org/2009/03/another-502-error-during-blog-entry-post.html and http://forums.movabletype.org/2009/03/502---web-server-received-an-invalid-response.html . Unfortunately he never found a fix and gave up on MT hosting on his own server. I however do not want to give up as I have been running MT fine myself since the 2.x branches.
Sometime this morning I suddenly started getting the 502 error only when posting to my main site http://www.hoyty.com/hoytyweblog/ it is not happening on my other two sites http://www.hoyty.com/htblog/ or http://www.hoyty.com/techedblog/ . I made a post successfully at 11:20 AM EST using Windows Live Writer. But then I tried to make another one at about 12:30 PM and started getting the 502 error. I have made test posts to the other two sites and can verify they both still work. I also tried making a post directly via http://www.hoyty.com/MovType/mt.cgi and it doesn't work. The post will show up in the Entry list but the updating of the html on the site doesn't occur. I can't find anything that changed in the hour or so between posts to explain this behavior and as I said it is only affecting one of the sites managed by this MT install. Any ideas or pointers greatly appreciated.
Reported on Movable Type 4.2
Is there any additional information in the IIS logs? A sub error maybe 502.1 or 502.2?
2009-06-28 15:49:12 96.244.44.18 GET /MovType/mt.cgi __mode=rebuild&blog_id=2&type=entry-912&next=0&offset=&limit=&total=0&start_time=1246204140&entry_id=912&is_new=0&old_status=1&old_previous=902&old_next=&fs=1 80 - 96.244.44.21 Opera/9.64+(Windows+NT+6.0;+U;+en)+Presto/2.1.1 502 2 3221225725 11154
This is the entry for the error in IIS logs. Does that help?
One other note I just figured out. I can save unpublished fine. When I publish it appears to be updating the archives fine it only fails on the main index page. I can get the attempted published item via monthly archives or direct link, it just doesn't show on front page.
There seems to have been a few issues in the past with IIS7 + Perl. This thread on iis.net has a little bit of information on how to debug http://forums.iis.net/t/1147121.aspx?PageIndex=1
Well after chasing my tail for weeks on wild goose chases of it being a problem with IIS 7.0, Perl, IIS 7.0+Perl I have narrowed the problem down. It was being caused by a widget called Home Page Widgets Group which is just a colleciton of widgets including Recent Comments, Recent Entries, Recent Assets and Tag Cloud. I then added each one of those four individually and found that it is the Recent Assets Widget that is causing the problem. At this point I have removed that widget since I am not sure how to troubleshoot that widget and what it does. I wish I could have figured this out a month and countless hours of troubleshooting before.
Oh and in case anyone else every has this happen the error in windows server event log was "perl.exe - Application Error : The exception unknown software exception (0xc00000fd) occurred in the application". Hopefully the finger won't always be pointed at Windows / IIS 7.0 in future.
The Recent Assets template would be grabbing thumbnails of image assets. Do you have ImageMagick installed?
Yes, from mt-check.cgi:
Image::Magick
Your server has Image::Magick installed (version 6.5.3).
Another problem that has shown up is Windows Live Writer is no longer working. It was working fine before I started ripping the guts out of Perl + IIS. Now when I try to configure or post from WLW I get this:
---------------------------
Error Connecting to Blog
---------------------------
An error occurred while attempting to connect to your blog:
Network Connection Error - Error attempting to connect to blog at:
http://www.hoyty.com/MovType/mt-xmlrpc.cgi
The operation has timed out
You must correct this error before proceeding.
---------------------------
OK
---------------------------
The mt-xmlrpc.cgi exists and is in its original state from the 4.261 zip file. I am not quite sure how that file works so I don't know what to look for. I followed the instructions at http://www.movabletype.org/documentation/author/windows-live-writer.html and it made no difference, but WLW was working fine without that before anyway. Perl seems to be working fine now except for this particular page?
I have never had to create a WLW manifest, can I check that you are using your web services password?
mt-xml-rpc.cgi should never respond to a get request for security reasons, only post requests.
Which authentication mode(s) are you running?
Anything in the event logs?
Thanks to this http://forums.movabletype.org/2010/04/corrupt-assets-cause-internal-error-500.html I was finally able to work around this issue. I switched to GD and the problem is gone. Not sure what the proble is with Magik but it doesn't affect GD. Only two years later finally a fix. I wanted to post this in case anyone else came across it.