With 12.5 I have had an issue with jobs getting stuck after the client beremote.exe crashes. Then my job stalls and does not progress onto the next server. I usually have to catch these manually, but I wrote some SQL that will detect them and email me.
Here is the SQL and attached is a C# console app that will generate an email. Just schedule the job every 30 or so minutes and let it run.
SELECT
JobName, [LastChangeDate], DATEDIFF(hh, [LastChangeDate], DATEADD(hh,5,getdate()))
FROM
[BEDB].[dbo].[Jobs]
WHERE
CurrentStatus = 16
AND
DATEDIFF(hh, [LastChangeDate], DATEADD(hh,5,getdate())) > 1
