Hi Kevin, Here is what we use, works for us in production: https://gist.github.com/kluyg/46ae3dee9000a358edf9
To unit test it, you'll need to check that your custom retry policy returns the RetryDecision you want for the inputs. To verify that it works in production, you can wrap it in a LoggingRetryPolicy like this: .withRetryPolicy(new LoggingRetryPolicy(new MyRetryPolicy(maxRetries = 3))) and you'll see the retries in the logs. Kind regards, Mikhail On Sun, Jul 12, 2015 at 10:07 AM, Kevin Burton <bur...@spinn3r.com> wrote: > I can’t seem to find a decent resource to really explain this… > > Our app seems to fail some write requests, a VERY low percentage. I’d > like to retry the write requests that fail due to number of replicas not > being correct. > > > http://docs.datastax.com/en/developer/java-driver/2.0/common/drivers/reference/tuningPolicies_c.html > > This is the best resource I can find. > > I think the best strategy is to look at DefaultRetryPolicy and then create > a custom one that keeps retrying on write failures up to say 1 minute. > Latency isn’t critical for us as this is a batch processing system. > > The biggest issue is how to test it? I could unit test that my methods > return on the correct inputs but not really in real world situations. > > What’s the best way to unit test this? > > -- > > Founder/CEO Spinn3r.com > Location: *San Francisco, CA* > blog: http://burtonator.wordpress.com > … or check out my Google+ profile > <https://plus.google.com/102718274791889610666/posts> > >
