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SQLRecoverableException:No more data to read from socket After Failover With UCP (Doc ID 1663481.1)

Last updated on NOVEMBER 08, 2021

Applies to:

JDBC - Version to [Release 11.2 to 12.1]
Universal Connection Pool - Version and later
Information in this document applies to any platform.


Fast Connection Failover (FCF) does not work after failover with Universal Connection Pool (UCP) or

Even though the application recieves FAN event, UCP throws SQLRecoverableException when using the connection.

java.sql.SQLRecoverableException: No more data to read from socket
       at oracle.jdbc.driver.T4CMAREngine.unmarshalUB1(
       at oracle.jdbc.driver.T4CTTIfun.receive(
       at oracle.jdbc.driver.T4CTTIfun.doRPC(
       at oracle.jdbc.driver.T4C8Oall.doOALL(
       at oracle.jdbc.driver.T4CStatement.doOall8(
       at oracle.jdbc.driver.T4CStatement.executeForRows(
       at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(
       at oracle.jdbc.driver.OracleStatement.executeUpdateInternal(
       at oracle.jdbc.driver.OracleStatement.executeUpdate(
       at oracle.jdbc.driver.OracleStatementWrapper.executeUpdate(
       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
       at sun.reflect.NativeMethodAccessorImpl.invoke(
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(
       at java.lang.reflect.Method.invoke(
       at oracle.ucp.jdbc.proxy.StatementProxyFactory.invoke(



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