ORACLE ERROR CODE ORA-00053
ERROR
maximum number of enqueues exceeded
CAUSE
Ran out of enqueue state objects
ACTION
Increase the value of the ENQUEUES initialization parameter

ORACLE ERROR CODE ORA-00052
ERROR
maximum number of enqueue resources (string) exceeded
CAUSE
Ran out of enqueue resources
ACTION
Increase the value of the ENQUEUE_RESOURCES initialization parameter

ORACLE ERROR CODE ORA-00051
ERROR
timeout occurred while waiting for a resource
CAUSE
Usually due to a dead instance
ACTION
Check for any dead, unrecovered instances and recover them

ORACLE ERROR CODE ORA-00050
ERROR
operating system error occurred while obtaining an enqueue
CAUSE
Could not obtain the operating system resources necessary to cover an oracle enqueue. This is normally the result of an operating system user quota that is too low
ACTION
Look up the operating system error in your system documentation and perform the needed action

ORACLE ERROR CODE ORA-00042
ERROR
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

ORACLE ERROR CODE ORA-00041
ERROR
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