Last updated on AUGUST 07, 2016
Applies to:
JDBC - Version 11.2.0.1.0 to 12.1.0.1.0 [Release 11.2 to 12.1]Universal Connection Pool - Version 11.2.0.1.0 to 12.1.0.1.0 [Release 11.2 to 12.1]
Information in this document applies to any platform.
Symptoms
JDBC database connections using a driver earlier than 12.1.0.2 fail with a "Socket read timed out" error, such as the one listed in the following exception stack:
org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is java.sql.SQLException: Exception occurred while getting connection: oracle.ucp.UniversalConnectionPoolException: Cannot get Connection from Datasource: java.sql.SQLRecoverableException: IO Error: Socket read timed out
With a limited number of JDBC connections (such as a single, small JDBC or UCP connection pool), the application works successfully.
With a high number of JDBC connections, the "IO Error: Socket read timed out" error occurs.
Cause
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