coverityfix

[inspurSDN]

Root cause: CID38551 CHECKED_RETURN CID37420 FORWARD_NULL CID36421 UNCAUGHT_EXCEPT CID38520 UNCAUGHT_EXCEPT CID323404 UNCAUGHT_EXCEPT

Solution: CID38551 add if block CID37420 add null check CID36421 add try block CID38520 add try block CID323404 add try block