If an Azure Function that is triggered by a message on a Storage Queue throws an exception, the message will automatically be returned to the queue and retried again in the future. In addition to specifying how soon the message will be retried, you can also configure how many times the message will be retried by editing the host.json file. By default a message will be retried 5 times before finally failing. The following host.json specifies that a message should be retried 10 times before finally failing: { version: 2.0, extensions: { queues: { maxDequeueCount: 10 } } } Handling Poison Messages in Azure Functions Once a message has been retried the maximum number of times, it will be considered a poisonous message, essentially that if we keep it on the queue it will “poison” the application/func
