oracle error- ORA-00041: active time limit exceeded - session terminated

ORA-00041: active time limit exceeded - session terminated

Cause:     The Resource Manager SWITCH_TIME limit was exceeded.

Action:     Reduce the complexity of the update or query, or contact your database 

administrator for more information.

oracle error- ORA-00040: active time limit exceeded - call aborted

ORA-00040: active time limit exceeded - call aborted

Cause:     The Resource Manager SWITCH_TIME limit was exceeded.

Action:     Reduce the complexity of the update or query, or contact your database 

administrator for more information.

oracle error- ORA-00042: Unknown Service name string

ORA-00042: Unknown Service name string

Cause:     An attempt was made to use an invalid application service.

Action:     Use a valid service name from SERVICE$ or add a new service using the 

DBMS_SERVICE package.