ServiceBus Trigger - Fail With Retry

V2. .Net Functions

How do I signal that a message has failed to process and that the message should be retried?

Also by inference - How do I signal that a message has failed permanently?

Note - Exceptions within the function will cause the function app host to restart - this is not desirable or necessary - see #3945

Review the ServiceBus trigger handling in the V2 .NET Functions host and compare the exception behavior described in #3945. Determine the expected way to signal retryable versus permanently failed messages without restarting the app; done means both outcomes have a clearly defined host behavior.

Written by the indexing model from the issue text.