Getting http 400 bad request after database attachment

Question

Our client attached a database from SP 2013 testing environment to SP 2013 Production env. Now they are getting the error: http 400 bad request.

I have never done this before, so I was wondering if there are any tips as to what might be causing this, or where can I start to look for the issue?

I have checked the IIS, the sites and the pools are running fine. I have restarted them by the way. And I have checked the ULS logs and I see nothing there related to http 400 bad request.

Any ideas?

Answer 1

Some time when you attach a Content DB to the web application, it could not get updated all places in SharePoint. In this kind of sitution, we follow the below steps to fix it.

1. Dettach the Content DB from Web App, using Central admin or Powershell
2. Re attach the Content DB.