Umbraco - The Xml cache is corrupt. Use the Health Check data integrity dashboard to fix it

Question

I am getting this error after deploying Umbraco website to the shared hosting site.

Couldn't able to find any solution. Tried refreshing App Pool

The Xml cache is corrupt. Use the Health Check data integrity dashboard to fix it.

Please if anyone can help, I am on production server now. Local is running perfectly fine.

Hanus

Answer 1

We've had the same issue recur a few times over the last few weeks, with content editors suddenly unable to preview anything.

• "Republish entire site" - doesn't work
• Restarting the site / recycle app pool - doesn't work
• Deleting Umbraco's cache - doesn't work
• umbracoUseSSL is already set correctly

What does work, every time: Empty Umbraco's recycle bin!

Can anyone provide some insight as to why that's a solution, or anything we can do about it? How could the recycle bin's contents even be involved in the previewing functionality?

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Edit: the issue we were experiencing was fixed in the 7.15.1 update, as mentioned by Steve Megson here:

There was an issue with preview in 7.15.0 (fixed in 7.15.1) which would throw this exception when it failed to generate the preview version of the XML cache

Arie

Answer 2

Are you able to access the URL "/umbraco/dialogs/republish.aspx?xml=true" on your production server?

I've had this happen in the past on earlier versions of Umbraco, and after running this I have been able to go into the backoffice and address the issues with the XML data integrity.

Outside of this, I echo Robert's point on posting on Our.

Quigley

If you were to use a backup of the production site on your local code base, does it work? – Quigley

To indulge me, have you tried clearing all the runtime generated files from your App_Data folder? Things like your Examine indexes and the like. – Quigley

Answer 3

See this forum thread on our.umbraco.org

It provides some troubleshooting tips you can try. It would also help to know what version of Umbraco the site is running on.

Have

Nothing works sir, that's why I posted here. Can you guide me? – Hanus

first of all, what version of Umbraco is the site running on? What have you tried so far? – Have

Umbraco version 7.9.2, App pool restarted, tried deleting Umbraco.config file – Hanus

Post the question on the forum on Our.Umbraco - I'll make sure it's not marked as spam, and you'll be able to get the help of the full Umbraco community - there are too many variables to be able to answer it here – Have

Something else you can try is looking in the logfile in ~/App_Data/Logs and see if there are any exceptions thrown there. It's possible there's a specific content node that's failing to publish properly, and you may need to go directly to it and click the Publish button. – Have

Answer 4

The same error message also appears if you forget to add providerName="System.Data.SqlClient" to the connection string!

Papilla

Answer 5

I had this same issue, i have fixed this by editing the web.config file. I had to set umbracoUseSSL to true

Phosphine

Answer 6

The web.config setting <add key="Umbraco.Preview.Mode" value="Legacy" /> is fixing it for us in version 7.15.6

Rhoads

Answer 7

I had this problem after upgrading an old v4 website to the latest version of v7(7.15.10) and adding MaxPool=1000 to the connection string seems to have fixed the problem.

Various