In Netbackup ,the most common issue came i.e EMM Server is down ,
So i search in Symantec , and very hidden article came up,by Symantec, and its not easy to find this article
So i am sharing this , its excellent one. i resolved a lot from this
How to troubleshoot NetBackup Enterprise Media Manager (EMM) startup issues
|Article:HOWTO61176|||||Created: 2011-12-02|||||Updated: 2012-09-27|||||Article URL http://www.symantec.com/docs/HOWTO61176
Note: It is not a comprehensive Process Flow for all issues, related to EMM, but does provide basic information for moving forward with an EMM related case.
Hoping it helps thousands of Symantec NetBackup Users.
Me too easy to troublehoot this
mANY THANKS TO Symantec