DRCP: ORA-12170 With Combination RAC, DRCP and a Firewall
(Doc ID 953277.1)
Last updated on MARCH 31, 2022
Applies to:
Oracle Net Services - Version 11.1.0.6 to 11.2.0.4 [Release 11.1 to 11.2]Information in this document applies to any platform.
This document is limited to situations where DRCP or Database Resident Connection Pooling is used with a Firewall in place.
Symptoms
Clients configured to use DRCP, connecting to a RAC cluster through a firewall may experience connection timeouts or failures. The following error would be returned:
ORA-12170: TNS:Connect timeout occurred
A level 16 Oracle Net client trace shows the following stack:
These errors are all indicative of a timeout.
TNS-12535 TNS: Operation timed out
.
Changes
This is likely a new implementation of Database Resident Connection Pooling or DRCP. It may also be the case that a firewall has recently been inserted between DRCP clients and the database server.
Note that since the creation of this document, a new feature has been introduced in version 12.
Please see this document as well: <NOTE:1333553.1> - 12g: How to Configure DRCP Broker to Use a Specific Listening IP Address
Cause
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In this Document
| Symptoms |
| Changes |
| Cause |
| Solution |
| References |