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Linked Servers - Oracle and SQL Agent
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12/3/2007 9:02:28 AM
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Burned again by the famous combination of Oracle and SQL Server linked servers, and a poorly configured SQL Agent job.
Scenario:
- Job Runs every 5 minutes
- Job Runs a standard T-SQL Stored Procedure
- Stored Procedure makes use of Oracle Linked Server (full 4 part naming and Open query used)
- Oracle goes down for scheduled maintenance
- SQL DBA's forget to stop job
- Job pages on-call (me)
- Disable job until Oracle maintenance complete
- Oracle maintenance complete.
- Connectivity of linked server verified
- Re-enable job
- JOB Fails !
- T-SQL Stored procedure runs from SSMS fine, but won't run as a job
Here is the poorly configured sql agent. 1st off the job output file is set to over-write, so know as I write this I can't quote the exact error, 2nd the system was set at the default job history retention, so I can't go into the job history to grab the error either.
Basically the error was something about reading a row from sysoledbservers or something.
The solution was to Stop and Start SQLAgent; now why SQLAgent, running tsql using a linked server would not work, when the sqm tsql would run just fine from SSMS is beyond me, which is why I wish i had the exact error, as I was going to call pss support, which i didn't do at 1am in the morning.
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