SOA 11g : EM Console fails with HTTP 404 error ; JspServlet error

After restarting servers (admin and managed) found that EM console isn't coming up and it shows below error either on browser or Admin server log files:

"JspServlet error: Servlet unable to dispatch to the following requested page: java.io.FileNotFoundException: /targetauth/asLogin.jspx"

On further checking the directory targetauth was missing from <MW_HOME>/user_projects/domains/<domain_name>/servers/AdminServer/tmp/_WL_user/emcore/28c293 location. This directory has the asLogin.jspx file.

You can copy this directory from a different domain but that would still give errors like

"JspServlet error: Servlet unable to dispatch to the following requested page: java.io.FileNotFoundException: MDS-00013: no metadata found for metadata object "/targetauth/asLogin.jspx"

Solution :

1. Stop the Admin server

2. Rename <MW_HOME>/user_projects/domains/<domain_name>/servers/AdminServer/tmp/ directory to tmp-old

3. Restart the Admin server. The tmp directory will be recreated again.

Open EM Console.It should work now !