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New Connections to the Database lead to ORA-12518 or TNS-12518 (Doc ID 340089.1)

Last updated on OCTOBER 20, 2019

Applies to:

Oracle Net Services - Version and later
Information in this document applies to any platform.
***Checked for relevance on 1-OCT-2014***
Database may be configured as DEDICATED or Shared Server (MTS).


* ORA-12518 errors in the listener log when new users are connecting to the Database. Example is as follows:

TNS-12518: TNS:listener could not hand off client connection
  TNS-12547: TNS:lost contact
   TNS-12560: TNS:protocol adapter error
    TNS-00517: Lost contact
     IBM/AIX RISC System/6000 Error: 32: Broken pipe

This is an intermittent problem that would likely occur at peak database usage times.


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