ORA-12170

Not All ORA Errors Are Thrown By Database Instance

by Ed Chen
June 30, 2014December 11, 2022

You might think all ORA errors are all thrown by databases. Actually, some ORA errors are thrown by JDBC drivers, listeners or Oracle clients. For… Read More »

How to Resolve ORA-12170: TNS:Connect timeout occurred

by Ed Chen
May 29, 2014December 11, 2022

ORA-12170 At some points, the client sides received intermittent ORA-12170 repeatedly: ORA-12170: TNS:Connect timeout occurred Meanwhile, the server side did not receive any errors either… Read More »

How to Resolve ORA-3136 Inbound Connection Timed Out

by Ed Chen
October 11, 2012February 7, 2023
2 Comments

ORA-3136 At times, some users complained about connection timeout, and you saw error messages ORA-3136 in sqlnet.log as such: Fatal NI connect error 12170. … Read More »