I am trying to understand the the default multiplier for exponential backoff strategy for Spring WebClient Retry.backoff method. And can this be configured? I cannot find documentation for this.
Version: reactor-netty 0.9.12.RELEASE
The utility method Retry.backoff, as you said correctly, creates an exponential backoff strategy. The multiplier is 2. In other words, the backoff period doubles in length on each retry/failure.
You can see this in action in reactor.util.retry.RetryBackoffSpec#generateCompanion.
The "multiplier", as you can see, is hardcoded and is therefore not configurable out-the-box. In order to use something other than 2 you would create your own Retry implementation and specifically implement the generateCompanion() method to do logic as is done in RetryBackoffSpec but using your own custom multiplier.