Connection to db fails from client if connecting with sqlplus user/ps@NAME

Question

Hi
I have just installed Oracle client 11.2 on a linux server.
When I connect with sqlplus apmr/******@apm
I am getting:
SQL*Plus: Release 11.2.0.2.0 Production on Thu Mar 29 11:11:17 2012
Copyright (c) 1982, 2010, Oracle. All rights reserved.
ERROR:
ORA-12545: Connect failed because target host or object does not exist
BUT, if I am connecting with /nolog and then insert user/password --> it success!!!
Could anyone solve this mystery ? :-)
sqlplus /nolog
SQL*Plus: Release 11.2.0.2.0 Production on Thu Mar 29 11:12:20 2012
Copyright (c) 1982, 2010, Oracle. All rights reserved.
SQL> conn apmr_larisa@apm
Enter password:
Connected.
Thanks
Larisa

Answer 1

884714 wrote:
Thanks a lot for the response. I am getting the following error :
java.sql.SQLException: Io exception: The Network Adapter could not establish the connection.Before asking you to get the help from your DBA, i would suggest to check couple of things like:
1) Write a standalone program and check whether everytime you are getting connection. If answer is yes.
2) Check whether in your web application do jdbc jar's are there (in lib folder) . If answer is yes. Check the version of jars. because the application first checks the dependant jars in application lib folder, if not found then it checks at classpath.
So this might casuse a problem.
If no luck after doing above steps, then i would suggest to ask the DBA, does DB goes down frequently? and show him that error. Because the error is pure say's SID is not up and running.