Contents
What are transient errors?
Transient errors are intermittent errors caused by a short lived outage of a specific resource or service.
What causes a transient error?
Transient errors (transient faults) An occasional cause of transient errors is when the Azure system quickly shifts hardware resources to better load-balance various workloads. Applications that connect to your database should be built to expect these transient errors.
How does Polly retry work?
With Polly, you can define a Retry policy with the number of retries, the exponential backoff configuration, and the actions to take when there’s an HTTP exception, such as logging the error. In this case, the policy is configured to try six times with an exponential retry, starting at two seconds.
What is a non-transient error?
0x800423F4 translates to the VSS error “VSS_E_WRITERERROR_NONRETRYABLE” or “The writer experienced a non-transient error. If the backup process is retried, the error is likely to reoccur.” This error is expressing that a generic error occurred in the backup process and is likely to happen again.
What is the another way to say retried?
What is another word for retry?
| re-attempt | redo |
|---|---|
| reiterate | repeat |
| take another stab | try again |
| attempt again | rerun |
When to use a retry pattern in an application?
Use this pattern when an application could experience transient faults as it interacts with a remote service or accesses a remote resource. These faults are expected to be short lived, and repeating a request that has previously failed could succeed on a subsequent attempt. This pattern might not be useful:
Why are retry patterns important in the cloud?
An application that communicates with elements running in the cloud has to be sensitive to the transient faults that can occur in this environment. Faults include the momentary loss of network connectivity to components and services, the temporary unavailability of a service, or timeouts that occur when a service is busy.
What do you need to know about a retry policy?
A retry policy is a combination of all of the elements of your retry strategy. It defines the detection mechanism that determines whether a fault is likely to be transient, the type of interval to use (such as regular, exponential back-off, and randomization), the actual interval value (s), and the number of times to retry.
When to use retry and circuit breaker patterns?
Circuit Breaker pattern. If a failure is expected to be more long lasting, it might be more appropriate to implement the Circuit Breaker pattern. Combining the Retry and Circuit Breaker patterns provides a comprehensive approach to handling faults. For most Azure services, the client SDKs include built-in retry logic.