ORA-12518 / TNS-12518 Troubleshooting
(Doc ID 556428.1)
Last updated on FEBRUARY 20, 2019
Applies to:Oracle Net Services - Version 184.108.40.206 to 220.127.116.11 [Release 11.2 to 12.2]
Information in this document applies to any platform.
Connexion fails with the error : TNS-12518: TNS:listener could not hand off client connection
One of the following errors could also appear :
ORA-12547 / TNS-12547: lost contact
ORA-12537 / TNS-12537: connection closed
ORA-3135 / TNS-3135 : connection lost contact
ORA-3113 / TNS-3113 : end-of-file on communication channel
ORA-3106 / TNS-3106 : fatal two-task communication protocol error
ORA -3136 / TNS-3136 : WARNING inbound connection timed out
ORA-12535 / TNS-12535: TNS:operation timed out
ORA-12170 / TNS-12170: Connect timeout occurred
ORA-12637 / TNS-12637: Text: Packet receive failed
memory consumption and/or high load
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