Failover Failure and The Network Adapter Could Not Establish The Connection Error When Using DESCRIPTION_LIST with JDBC 12.1.0.2
(Doc ID 2108614.1)
Last updated on AUGUST 09, 2023
Applies to:
JDBC - Version 12.1.0.2.0 and laterInformation in this document applies to any platform.
Symptoms
Standalone test shows a connection attempt using the JDBC/thin 12.1.0.2 (ojdbc7.jar) fails with "The Network Adapter could not establish the connection".
The same test succeeds with JDBC 11.2.0.3 (ojdbc6.jar) or JDBC 12.1.0.1 (ojdbc7.jar).
The connect string is:
url=jdbc:oracle:thin:@(DESCRIPTION_LIST=(LOAD_BALANCE=off)(FAILOVER=on)(DESCRIPTION=(CONNECT_TIMEOUT=3)(RETRY_COUNT=3)(ADDRESS_LIST=(LOAD_BALANCE=on)(ADDRESS=(PROTOCOL=TCP)(HOST=<HOSTNAME1>)(PORT=<PORT>)))(CONNECT_DATA=(SERVICE_NAME=<SERVICE_NAME1>)))(DESCRIPTION=(ADDRESS_LIST=(LOAD_BALANCE=on)(ADDRESS=(PROTOCOL=TCP)(HOST=<HOSTNAME2>)(PORT=<PORT>))) (CONNECT_DATA=(SERVICE_NAME=<SERVICE_NAME2>))))
If the <SERVICE_NAME1> is available on <HOSTNAME1>, the connection will be made successfully. If, however, the <SERVICE_NAME1> is not available on <HOSTNAME1>, but <SERVICE_NAME2> is available on <HOSTNAME2>, the connection will still fail.
Changes
Cause
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In this Document
| Symptoms |
| Changes |
| Cause |
| Solution |
| References |