Observe packet task failures to prevent unobserved overflow exceptions
Server dispatch and session enqueue operations create packet bus items without
waiting for delivery. When the pending-message queue overflows, Fail faults
the item's completion task, which can later raise UnobservedTaskException
even if the application handles the dropped-message notification.
Observe the completion task's exception inside MqttPacketBusItem.Fail. This
keeps the task faulted and preserves the original exception for existing and
future WaitAsync callers, including DeliverApplicationMessageAsync.
Add a garbage-collection regression test for failures without a waiter and
verify that requesting the task before or after failure preserves the original
overflow exception. Re-enable unobserved-exception tracking in the existing
overflow integration tests for both drop strategies.
Before the fix, the focused run failed the new unobserved-exception test and
both enqueue overflow tests. After the fix, all nine focused cases and all
489 tests in the .NET 10 Release test suite pass.
Fixes https://github.com/dotnet/MQTTnet/issues/2271
* Make use of language features line AsyncDispose, init etc.
* Fix build errors
* Improve Unit Tests
* Improve Unit Tests
* Improve Unit Tests
* Update samples
* Remove obsolete benchmarks
* Code cleanup
* Improve unit tests
* Improve Unit Tests
* Fix Unit Tests
* Improve Unit Tests
* Improve Unit Tests
* Restore unit tests
* Exclude load tests from unit tests
* Improve session message injection methods
* Add more tests for session injection
* Change return type from MqttPublishPacket to MqttPacketWithIdentifier
* Use dedicated type for MattApplicationMessage injection result
* Code review minor fixes
* Apply project code style
* Update release notes
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Co-authored-by: Anton Smolkov <anton.smolkov@idp.zyfra.com>
Co-authored-by: christian <6939810+chkr1011@users.noreply.github.com>
Jochen Kühner
Christian
