Thought of sharing this query which helps in identifying the status of UDT polling jobs which have failed. Got this from petersent. So just reporsting it so that others can also know about.
use NetPerfMon;
select b.nodeid,b.engineid,c.ServerName,COUNT(*) numberOfFailures
from udt_job a,nodes b,Engines c
where a.NodeID=b.nodeid
and b.engineid = c.engineid
and a.JobLastResult = 0
group by b.nodeid,b.engineid,c.ServerName