Ora-12518 on Oracle 12c Multitenant Architecture
(Doc ID 2252001.1)
Last updated on MARCH 31, 2022
Applies to:
Oracle Net Services - Version 12.1.0.1 and laterOracle Database - Enterprise Edition - Version 11.2.0.4 to 11.2.0.4 [Release 11.2]
Information in this document applies to any platform.
Symptoms
When attempting to connect to PDB via listener,
the following error occurs.
ERROR
-----------------------
ORA-12518: TNS:listener could not hand off client connection
Listener log:
=======
03-APR-2017 08:57:31 * (CONNECT_DATA=(SID=wd1)(CID=(PROGRAM=d:\orasfw\prd1\bin\sqlplus.exe)(HOST=Host name )(USER=ismeirb))) * (ADDRESS=(PROTOCOL=tcp)(HOST=XX.XX.XX.XX)(PORT=63994)) * establish * wd1 * 12518
TNS-12518: TNS:listener could not hand off client connection
TNS-12560: TNS:protocol adapter error
TNS-00530: Protocol adapter error
64-bit Windows Error: 203: Unknown error
Cause
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In this Document
| Symptoms |
| Cause |
| Solution |
| References |