Does gRPC retry mechanism work and if so, where am I wrong?

What version of gRPC are you using?

1.20

What did you expect to see?

I’m trying to figure out how to set up custom retry mechanism. After looking at A6-client-retries and searching through github/google I didn’t find any real examples/explanations. So I think that I missed some notable thing.

So, I try to create a client connection with a retry mechanism. Like:

    Map<String, Object> retryPolicy = new HashMap<>();
    retryPolicy.put("maxAttempts", 5D);
    retryPolicy.put("initialBackoff", "10s");
    retryPolicy.put("maxBackoff", "30s");
    retryPolicy.put("backoffMultiplier", 2D);
    retryPolicy.put("retryableStatusCodes", Arrays.<Object>asList("UNAVAILABLE", "UNAUTHENTICATED"));
    Map<String, Object> methodConfig = new HashMap<>();
    Map<String, Object> name = new HashMap<>();
    name.put("service", "client");
    methodConfig.put("name", Collections.<Object>singletonList(name));
    methodConfig.put("retryPolicy", retryPolicy);
    Map<String, Object> serviceConfig = new HashMap<>();
    serviceConfig.put("methodConfig", Collections.<Object>singletonList(methodConfig));

    final NettyChannelBuilder channelBuilder = NettyChannelBuilder
        .forAddress(host, port)
        .enableRetry()
        .defaultServiceConfig(serviceConfig)
        .intercept(authInterceptor);

And client behavior doesn’t change. Could anybody get me an advice/example or move me in the right direction?

[voidzcy]

@dshylov

You service name still does not look right. It should be the full name of the service, which is PROTO_FILENAME.SERVICE_NAME. For example, for the helloworld example, it should be helloworld.Greeter. I’ve tried with your retry config, it worked for me by using the helloworld example.

[dshylov]

Thanks for the explanation @voidzcy I will close this issue since the original problem was resolved.