Question: What is the
oraclr_connection_data entry in the tnsnames.ora
file? How does it relate to the error message
ORA-28575? What does CLR stand for?
ORA-28575: unable to open RPC connection to external
Answer: One reason for the
"ORA-28575: unable to open RPC connection to external
procedure agent" is not having the correct ORACLR entry in
your TNSNAMES.ORA file.
See here for details on
the ORA-28575 error.
By default, the Oracle Database Extensions for .NET uses
CLRExtProc as the SID, and the Oracle CLR (Common Language
Runtime) is installed as a part of .NET. Oracle CLR
host is installed as part of Oracle Database Extensions for
.NET installation and runs in the extproc process, hence the
You can check for ORACLR_CONNECTION_DATA in tnsnames.ora
and CLRExtProc related entries in listener.ora.
To test a CLR connection, enter "tnsping
ORACLR_CONNECTION_DATA" and see if it succeeds.
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