How to do infinitely retry on exception for CosmosDBTrigger(Or other function trigger)

[blankor1]

Our services are using CosmosDBTrigger in isolated mode and are relying on attributes like [FixedDelayRetry] and [ExponentialBackoffRetry] for retry on exception.

Is it possible the let the CosmosDBTrigger do infinitely retry on exception during the execution? like setting the retry count to -1?

[jviau]

@blankor1 it sounds like you want high levels of resilience for this trigger. If that is the case, I don't recommend relying on retries as many other external factors may lead to even that not being a guarantee (instance crash, scale in, shutdown, etc). Additionally, sometimes there is a fatal error where no matter how many times your trigger retries it will never succeed (did you delete the resource / db / container? lose access? ETag issues?)

For resilience, I recommend looking into durable functions. This will be much more reliable for a distributed application, as it can retry between crashes, restarts, etc.

But to answer your question directly: retry attributes are just a convenience method. If they do not suit your needs (such as indefinite retry), you can look into using something like Polly directly in your trigger.

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[microsoft-github-policy-service]

This issue has been automatically marked as stale because it has been marked as requiring author feedback but has not had any activity for 4 days. It will be closed if no further activity occurs within 3 days of this comment.