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?

Scheduler appears to be hung ...

SQL 7.0 SP4 logging this message :
The Scheduler 0 appears to be hung. PSS 0x652E50D0, EC 0x652E5280, UMS Context 0x2FB7E0A0

While SQL is logging these messages SQL is blocked
This is hapening 5-10 times in week.
In traced file I found that there is no same query from application that causes this blocking.
What this qould be ?!
Is it SQL engine or is it hardware on underlaying-server ?
What with combination beetwen SQL 7.0 and Windows Server 2000.
Or even is it problems with queries from application ?HTH

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