Event ID - 6012

Event Id6012
SourceNotificationServices
DescriptionThe delivery protocol could not be closed.
Event InformationAccording to Microsoft:
Explanation:

This error occurs when a call by the distributor to the IDeliveryProtocol.Close() method of a delivery protocol generates an exception.
User Action:
If you are using a built-in delivery protocol, examine the error log entry to determine the cause of the failure. If you are using a custom delivery protocol, it is throwing an exception in its implementation of the IDeliveryProtocol.Close() method. The error log entry contains more details about the type of exception that was thrown. Examine your code to determine why the exception is being thrown.
Reference LinksEvent id 6012 from source Notificationservice

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