Oracle Error Message
ORA-00053: maximum number of enqueues exceeded
Reason for the Error
An operation requested a resource that was not available, and the resource’s enqueue list had reached its maximum length.
If a request is made for an unavailable resource, the request is enqueued to wait for the resource.
The initialization parameter ENQUEUE RESOURCES specifies the maximum number of requests that can be queued for a given resource.
When the maximum number of requests is reached, no more requests can be added to the enqueue list.
In a few minutes, try the operation again.
If you receive this message frequently, restart Oracle, increase the ENQUEUE RESOURCES parameter in the initialization parameter file, and restart Oracle.