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Finding the root of a crasher-issue with infinite redirects
27 September 2009 at 3:42am Last edited: 27 September 2009 3:43am
Hello,
I have been working on a small project with Silverstripe recently, when my entire computer suddenly started to freeze. What I figured out was that this happens whenever I would open the home page. I also found out that in an instance about a hundred MySQL queries were launched. At this stage my computer typically became unusable, but I was able to catch the following line from MySQL administrator:
SELECT `SiteTree_Live`.*, `BlogEntry_Live`.*, `BlogHolder_Live`.*, `Forum_Live`.*, `ForumHolder_Live`.*, `ImageGalleryPage_Live`.*, `ErrorPage_Live`.*, `RedirectorPage_Live`.*, `VirtualPage_Live`.*, `SiteTree_Live`.ID, if(`SiteTree_Live`.ClassName,`SiteTree_Live`.ClassName,'SiteTree') AS RecordClassName FROM `SiteTree_Live` LEFT JOIN `BlogEntry_Live` ON `BlogEntry_Live`.ID = `SiteTree_Live`.ID LEFT JOIN `BlogHolder_Live` ON `BlogHolder_Live`.ID = `SiteTree_Live`.ID LEFT JOIN `Forum_Live` ON `Forum_Live`.ID = `SiteTree_Live`.ID LEFT JOIN `ForumHolder_Live` ON `ForumHolder_Live`.ID = `SiteTree_Live`.ID LEFT JOIN `ImageGalleryPage_Live` ON `ImageGalleryPage_Live`.ID = `SiteTree_Live`.ID LEFT JOIN `ErrorPage_Live` ON `ErrorPage_Live`.ID = `SiteTree_Live`.ID LEFT JOIN `RedirectorPage_Live` ON `RedirectorPage_Live`.ID = `SiteTree_Live`.ID LEFT JOIN `VirtualPage_Live` ON `VirtualPage_Live`.ID = `SiteTree_Live`.ID WHERE (`ParentID` = 18 ) AND (`SiteTree_Live`.ClassName IN ('Page','BlogEntry','BlogHolder','Forum','Fo
My Apache access log shows a long list like this, which matches a large number of spawned httpd processes, confirming my suspicions of it being a redirect problem (I only accessed the site once):
127.0.0.1 - - [26/Sep/2009:15:18:22 +0100] "GET / HTTP/1.1" 200 6509
127.0.0.1 - - [26/Sep/2009:15:18:21 +0100] "GET / HTTP/1.1" 200 7196
127.0.0.1 - - [26/Sep/2009:15:18:22 +0100] "GET / HTTP/1.1" 200 6509
127.0.0.1 - - [26/Sep/2009:15:18:23 +0100] "GET / HTTP/1.1" 200 6509
127.0.0.1 - - [26/Sep/2009:15:18:23 +0100] "GET / HTTP/1.1" 200 6509
127.0.0.1 - - [26/Sep/2009:15:18:26 +0100] "GET / HTTP/1.1" 500 8041
127.0.0.1 - - [26/Sep/2009:15:18:26 +0100] "GET / HTTP/1.1" 500 8041
127.0.0.1 - - [26/Sep/2009:15:18:28 +0100] "GET / HTTP/1.1" 500 8041
127.0.0.1 - - [26/Sep/2009:15:18:25 +0100] "GET / HTTP/1.1" 500 8041
127.0.0.1 - - [26/Sep/2009:15:18:26 +0100] "GET / HTTP/1.1" 500 8041
...I'm a bit afraid to do anything with Silverstripe now, but I will try to access the admin to look up details. I haven't been changing anything in my .htaccess file, but a notable thing I did was changing the page type of the Home page a BlogHolder and renaming its navigation label to "News". (Before I have been unsuccessful with removing the Home page and just having a News page since the Home page always returned from the dead at arbitrary times).
Help would be very much appreciated. Once again, I'll be happy to look up further details that might be helpful here - I can't really do anything else until this is fixed.
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Re: Finding the root of a crasher-issue with infinite redirects
27 September 2009 at 4:08am
I have found out that the problem only occurs when the RSS Feed module in the Blog is enabled and no URL of the RSS Feed is given.
It is not necessary to open the RSS feed itself to experience the problem. -
Re: Finding the root of a crasher-issue with infinite redirects
27 September 2009 at 5:11pm
This is certainly not normal behaviour for SS. You may have uncovered a cross compatibility bug within the modules. Crank up you apache logging to 'debug' and show what you get with those 500s. Check with the Trac issue list at http://open.silverstripe.com/ also.
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