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Listener stops responding and connection requests hang indefinitely (12.1.0.2)

edited Jun 25, 2018 2:11PM in Database Administration (MOSC) 10 commentsAnswered

Hello,

We're having serious issues with our listener process. It seems that after a while, it just stops working or respond at all.

Trace file indicate that everything is "normal" up to a point, and then it stops responding.

Any connection requests in this period will end up just hanging indefinitely (hours), until we restart the listener service.

System is running on Windows Server 2012R2 Datacenter.

Snip from listener.log:

...

22-FEB-2017 01:52:03 * service_update * p11276598 * 0

22-FEB-2017 01:52:33 * service_update * p11258916 * 0

Wed Feb 22 01:56:04 2017

22-FEB-2017 01:56:04 * service_update * p11260242 * 0

22-FEB-2017 01:58:04 * service_update * p11258171 * 0

Wed Feb 22 06:57:38 2017

System parameter file is \app\oracle\product\12.1.0\dbhome_1\network\admin\listener.ora

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