问题
my Oracle ODBC has stopped working today and i can't figure out why.
the error im getting when testing the connection in ODBC Administrator is: connect failed because target host or object does not exist
getting the same error when trying to do a tnsping on it.
everything worked on friday, and no updates or anything has been done to the server.
what could it be?
回答1:
TNSPING and PING will go a long way.
If you see a line like
.. Attempting to connect to (ADDRESS=SomeServerOrIPAddress)(PORT=1521) ...
from TNSPING, try pinging the address yourself from the command prompt
PING SomeServerOrIPAddress
If you get a good reply from PING but not TNSPING it's now an issue for your DBA.
If PING doesn't work you need to look at network issues:
- Is the client actually connected to the network ?
- Name resolution if PING said it can't resolve the server name
- Firewalls / Virus checkers blocking your traffic
- any number of other things
来源：https://stackoverflow.com/questions/6902061/oracle-tns-cant-connect-through-odbc-administrator