Hi,

We have a busy site (~5k users per hour) that has been running fine for the last few months until yesterday morning when the client tried to publish an update via the CMS and the Save and Publish process just hung.

We started to look in to why that may be the case and half the site content disappeared and the site was left looking very bare. We tried to republish the entire site using the /dialogs/republish.aspx screen but shortly after running this the site only displayed the Install screen as if Umbraco had not been set up. I checked the database connectivity and this was fine. I checked for the umbracoConfigurationStatus value - this was 7.2.7. We tried re-publishing but this did not work the first few times.

The site is running in a failover configuration on Azure and the secondary site was also showing the Install screen - the only common factor being the database.

After much stress and recovered backups we set up a third copy of the site as a stand alone snapshot of the last working copy of the site and database and did the republish content. The third site worked OK but at this point we realised we had the live servers listed in the

So after about 3 hours of downtime the primary site came back online (probably due to the refresh of the third system mentioned above).

Has anybody come across this error before and can they point me in the right direction to stop it from happening again?

We have an extremely anxious client who is building many micro-sites in to the Umbraco installation and they have pulled any further development until we can identify what the issue is.

I have checked the Azure event log and there is nothing unusual in there apart from a few exceptions from the UrlTrackerRepository plugin.

I'd be grateful for any help on this as the project is now stalled until an explanation can be found.

Thanks