Error: Server state changed to FORCE_SHUTTING_DOWN>

Error Message:
<Notice><WebLogicServer> <BEA-000365> <Server state changed to FAILED>
<Error><WebLogicServer> <BEA-000383> <A critical service failed. The server will shut itself down>
<Notice><WebLogicServer> <BEA-000365> <Server state changed to FORCE_SHUTTING_DOWN>

Solution:
Case1: Navigate to“boot.properties” and change with your new password as below.
Path: <BIEE_HOME>\user_projects\domains\bifoundation_domain\servers\AdminServer\security
Note: The Username and Password is already in encrypted format , just remove that and change the entry .
#Thu May 15 03:18:30 IST 2013
password=welcome123
username=weblogic
Save these files and start the services again. You should be able to start the server.

Case2: Otherwise Delete the "boot.properties" from the above location.
Start the BI services
At the time of starting the server it asks for "Username" and "Password", Enter the New "Username" and "Password"
A file named "boot.properties" will create in the above location with new credentials.

Note: If the above 2 cases didn't work means server is not accepting the new credentials.