Database Networking (MOSC)

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ORA-12541 No Listener appeared very randomly

edited Feb 1, 2018 8:05PM in Database Networking (MOSC) 5 commentsAnswered ✓

Hi Gurus,

Thanks for your time to read my question.

I am currently meeting a very weird problem in my environment(ENV INFO at Bottom of this post), I have a long time (5+ hours) running application batch job  which includes so many steps need to to connect database to complete transactions,

one step connects to DB to complete transactions and disconnect, and next step do same thing and so on...

During the app batch job running, some steps failed due to error ORA-12541 No Listener, and if re-run this step right way, the step can be completed successfully immediately, because the listener definitively is up and running on DB server side when the error is appearing.

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