Poison message
A poison message refers to a client–server model issue, where a client machine tries to send a message to the server and fails too many times (the actual amount of "too many" is variable). The behavior toward Poison messages varies - they are either discarded, create a service request event, or initiate other failure indications. The term is used mainly in Microsoft-related frameworks, like SQL Server or Windows Communication Foundation (WCF). RabbitMQ also has a notation of poisoned messages.