Batch Alert Group ,Error

Hi All,

All of sudden when I run Batch Alert Job , unfortunately ending up with an error.

I have debugged the Class "EvenJobCud"  , run() method as soon as the breakpoint hits the below highlighted  code , the following error pops up

I have also written a job for EventCud table and found that there 2260924  exists which all are in "Waiting" state , I doubt that if this could be the problem ?. (I am not sure).

Also when I right the table and try to open the Table Browser for EventCud table the AX system is getting freezed for forever.

Please provide suggestion .