I have a problem with the page which I edit from my site admin (no CMS used), it have different versions based on all edits by admin user (me).
When I go to that page on the site as normal user (who available only to view public webpage, not to edit), and press Ctrl+R(refresh page) several times sometimes it loads (oops!) old version of the page with no sequence and sometimes shows 404 error page (like "page not found"). What's that magic and where I should look to fix it? I see no problem neither in Unicorn production.log, nor in browser logs. Tried different browsers from different machines (even that never opened my site before), clearing cookies&cache in browser, even going to that "magic" page from my iPhone - result was the same - strange behaviour.
Could you please tell me how to fix or at least where to look up for fixing this problem?
Related
The Problem
I have a website running in IIS. If I rename or delete one of the layout page .cshtml files under /Views/ the site immediately begins throwing following yellow screen error as expected
The layout page "_Layout.cshtml" could not be found at the following path: "~/Views/_Layout.cshtml".
What surprises me is that if I recreate or rename the file so it is exactly like it was before, the yellow screen persists. Why is this particular 500 error sticky?
I currently think that this has something to do with IIS and is specifically related to error handling. The site immediately detects that the layout page file is missing. It does not immediately realize when the file is back in place.
Thanks!
Some interesting clues
This happens on all of my sites I've tried this on so far. It isn't related to a specific site
I tried this on two websites at the same time. On one site I repeatedly and consistently refreshed the page hoping for a success. On the other, I left it alone for several minutes before checking again. The site I leave alone will resolve its problems and find the layout page on disk again. The site I continually make requests to appears to display the error indefinitely.
What I've tried
I have reproduced the problem on Umbraco websites using Umbraco's default routing as well as regular MVC pages using custom routing. The problem is the same for both.
I don't have output caching configured in IIS
When I am reproducing the yellow screen error, I am able to reproduce the error in multiple browsers, so I don't believe it is related to browser caching
I checked on the httpRuntime in the root web.config and the fcnMode is set to fcnMode="Single"
I've fiddled around with the web.config customErrors and httpErrors. Nothing I've done here has affected the problem.
I am able to reproduce the problem on websites where there is no custom code for caching. No CDN. No load balancer.
Versions
IIS: I have reproduced the problem on Windows Server 2012R2 running IIS 8 and Windows 11 running IIS 10
CMS: All of the websites I have tested on so far are Umbraco 7 sites. However, I have reproduced the problem on pages that are routed using Umbraco's out of the box routing as well as pages that are just set up using MVC and aren't leveraging Umbraco.
It appears to be part of the behavior of FcnMode="Single". See https://learn.microsoft.com/en-us/dotnet/api/system.web.configuration.fcnmode?view=netframework-4.8. It isn't an issue with caching. It is a problem with the way that the site's file change notifications (FCN) are configured.
The sticky 500 behavior on renaming files happens when I use FcnMode="Single" but not when I use FcnMode="Default".
FcnMode="Single" will result in only a single object to monitor file changes. This single object is responsible for monitoring changes to files in the main directory and sub directories.
FcnMode="Default" will result in a separate object to monitor file changes for each directory.
Umbraco sites, by default, use FcnMode="Single". This makes sense because Umbraco sites cache under very deeply nested directories in /App_Data/. This can result in so many of these monitors that it can affect the performance of the site. There is a great explanation of FcnMode and why it matters for Umbraco here: https://shazwazza.com/post/all-about-aspnet-file-change-notification-fcn/
Unfortunately, it appears that the single file monitor can miss renames of files in some cases.
I've met a very strange bug when tried to open my web site http://akr-congress2016.ru/ in iOS Safari. Please see the screenshot below.
It seems like some elements are loaded from a completely other web site. The new site is a copy of the old one, but layout files (I'm using Phalcon) are changed. There is no link to the old web site at the page.
Also I've noticed doubled logo, it seems like a rendering bug.
When I refresh the page it is loaded normally.
I'm weird what might make Safari to load some fragments of the page from completely another domain.
The screenshot
Try to remove cache from browser. Or maybe it's just an issue of DNS. In that case you just need to wait untill DNS will get updated.
I am running an instance of Umbraco 6.1.x and it has started throwing 404 on published pages.
My page structure is as follows,
Content
Home
About
Course
...
Component
Home
About
Course
Where component holds all resources and modules (HTML sections and stuff) for a page and using a partial view macro I dynamically load all components at runtime for a specific page.
We are facing an issue where we get 404 on every page after a full republish once we hit the HomePage. Before hitting home page they are all fine, but the moment we hit the homepage they are all throwing 404. By overriding the handlers I found out that they are hitting ~/umbraco/RenderMvc!
Any idea what can cause this?
Thanks in advance.
EDIT:
It is actually throwing:
No template exists to render the document at url '/'
considering the aforementioned scenario.
I have proper allowed template setup and property on nodes are showing the correct template associated with the respective items. Not sure why it's losing template info. I can force it to load under correct template using ?altTemplate=templateName.
Some pointers, we have a view in Views/Shared folder (apart from macro partials) tied to a surface controller.
One thing I would like to say is, we are using nested (library.RenderMacroContent with Umbraco markup) in our partial views and I have realized that the whole page throws 404 if there's a page with a link to the broken page which is broken (i.e. page got re-created and on t==e of the components is holding a link to the page with previous id). Suggestions?
did you get to the bottom of this? We're having exactly the same problem at the moment, on the same version of Umbraco.
I've noticed that when it happens, the umbraco.config becomes either corrupt or rolls back to a much, much earlier version, with all sorts of attributes missing. This lead us to believe it was a sync issue between the DB and umbraco.config.
We initially thought we had solved it by deleting App_Data > TEMP > ExamineIndex and recycling the app pool etc. Maybe give this ago, as it fixed it for a while for us, but alas, the demon has reared its ugly head once more. We are still in a full on dev stage though, so the constant changing may be complicating it further for us - perhaps it will be a fix for you.
If you have any more info, or even a fix, it would be greatly appreciated.
Cheers
EDIT:
Ok, I think I've solved this now, but only time will tell. Try emptying your recycle bin & then republish entire site.
I managed to consistently recreate the bug using IIS SEO site analysis. Each time I did this, the log threw up an error 'cannot find node id xyz', turns out that (and other) nodes were in the recycle bin. Upon emptying it the errors stopped. Good luck!
Here is the site I'm working on: http://demo1.omnihealthtech.com/
If you try navigating with the 'Quick Links' menu, all pages show only the Home page, even though the URL is different. This only happens when I turn SEO-Friendly URLs on.
I've already got my host to do this http://docs.joomla.org/Enabling_Search_Engine_Friendly_(SEF)_URLs , but the problem is still occurring.
Other info:
- This site is running on the 'Gavick Startup' template.
- I have another site running on the 'Gavick Boutique' template, but that has no problems with SEO-Friendly URLs.
Very puzzled by what's going on. I've done a lot of Googling but nothing comes up :\ Please help! Thanks!
Okay I found the problem.
The Gavick theme had plugins called "System - GK Cache" and "System - GK Extended Cache". The Extended Cache was meant as an alternative caching system. Turning both on at the same probably causes a conflict resulting in the problem above. Simply disabling the Extended Cache puts everything back to normal.
I just updated active scaffold on my rails app, and now all the links are broken on the site. If I hover over the link in firefox, I can see http://localhost:3000/correct_link; however, when I click the link, I end up at http://localhost:3000/current_link#__1_. When the link is loaded all styling/javascript is messed up. Furthermore, the number after the two underscores increases every time I click another link, but I can never navigate away from http://localhost:3000/current_link__NUM_.
Interestingly, if I type the url that I want into the browser, all is well. There don't seem to be any errors in my logs or in my server console.
I'm not sure how to go about debugging this
Aha! The error was caused by my removing active_scaffold, which introduced some weird behavior from custom javascript that had hooked into it. After active scaffold was removed, the javascript started hijacking the links. Shuffling the javascript around fixed the bug