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Windows: Connections to Database are Slow / Hang and Report Errors TNS-12518/ORA-12518 (Doc ID 1346186.1)

Last updated on JUNE 30, 2021

Applies to:

Oracle Net Services - Version to [Release 11.1 to 11.2]
Microsoft Windows x64 (64-bit)
Microsoft Windows (32-bit)
Known to affect releases of Oracle, and


Remote and bequeath connections to Windows database hang, Finally reporting the error message TNS-12518: TNS:listener could not hand off client connection reported.
Oracle net client trace of a connection could show similar to the following:

Initial connect packet is sent from client to the TNS listener


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