Hi everyone,
We’ve just released NServiceBus.Transport.AzureServiceBus 4.2.3, 4.0.3, 3.2.5, and 2.0.8.
Fixed bugs
- #1063 Receive failures lock transport into single concurrency mode
How to know if you are affected
You are affected if you are using NServiceBus.Transport.AzureServiceBus version 3.2.0 or greater. However, the circuit breaker improvements have also been backported to 2.0.8 even though 2.0 did not contain the same concurrency bug.
Symptoms
After a receive failure arms the message pump’s circuit breaker, it may fail to recover, causing the message queue size to grow due to the transport being locked into single concurrency mode. Only a restart of the endpoint can return it to full processing capacity.
This would be perceived as poor performance, but log files will show likely multiple instances of a circuit breaker being armed and/or disarmed.
When to upgrade
You should upgrade during your next maintenance window.
Where to get it
You can install the new versions of NServiceBus.Transport.AzureServiceBus from NuGet.
Please read our release policy for more details.
With thanks,
The team in Particular