Scheduler not yielding?

All,

I'm getting the following error in my SQL logs:

Process 51:16 (2bc) UMS Context 0x1249F118 appears to be non-yielding on Scheduler 0.

I killed the process, but it's been rolling back for 3 hours. It's done zero IO and consumed a TON of CPU time.

Any suggestions as to what I can do?

Thanks,

Isaacpost details abt scheduler job.Are u executing DBCC DBREINDEX in that scheduler? what version of SQL server u are using? I hope it is SQL server 2000.If it is did u applied latest service pack?