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Intermittent Connection Errors ORA-17002 Using JDBC And SQL*Plus Client While Connecting To RAC (Doc ID 399136.1)

Last updated on JULY 27, 2018

Applies to:

Oracle Net Services - Version and later
JDBC - Version and later
Information in this document applies to any platform.
***Checked for relevance on 05-Mar-2013***


Intermittent failures to connect JDBC/thin to a RAC database with error:

IOException: The network adapter could not establish the connection. ( ORA-17002)

Connection string is


Connection to individual nodes always works:

Or this:


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