Non fatal Protocol violation errors seen in RmiServer logs

Document ID : KB000092690
Last Modified Date : 24/04/2018
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The following errors will be seen in the RmiServer<timestamp>.log files located in the master's $AW_HOME/log or %AW_HOME%\log (Windows OS) directory:

NotificationAction_149073146: .AxConnectionPool: returnConnection sID-19264257 UC4DB
NoificationAction_149073146: AwE-9999
NotificationAction_149073146: SQL Error: 17401
ErrorMsg: AwE-9999 Internal error (3/15/18 1:48 PM)
Details: null
java.sql.SQLException: Protocol violation: [1]
This is caused my a mismatch of the installed Oracle JDBC drivers and the version of Oracle the instance is running against.

Oracle JDBC driver
Oracle Database 12c Enterprise Edition Release - 64bit Production
Download the correct ojdbc.jar file from Oracle and replace this in the master's $AW_HOME/web/classes or %AW_HOME%\web\classes (Windows OS) directory.