Java SDK 429 Too Many Requests on bulk user updates — how to implement proper backoff

Trying to understand why my Spring Boot service consistently hits a 429 Too Many Requests error when performing bulk user updates via the Genesys Cloud Java SDK. The documentation states: “If the rate limit is exceeded, the API returns a 429 status code with a Retry-After header indicating the number of seconds to wait before retrying.”

I have configured the ApiClient with standard connection pooling, but the SDK does not seem to respect the Retry-After header automatically. Here is my current configuration:

spring:
 genesys:
 client-id: ${GC_CLIENT_ID}
 client-secret: ${GC_CLIENT_SECRET}
 base-url: https://api.mypurecloud.com
 pool-size: 20
 max-connections: 100

My code iterates through a list of users and calls usersApi.updateUser(userId, user). When the batch size exceeds 50, I start receiving 429 errors. Should I implement a custom exponential backoff strategy in the controller, or is there a built-in retry mechanism in the PureCloudPlatformClientV2 that I am missing? I want to avoid blocking threads manually if the SDK handles this internally.

TL;DR: SDK doesn’t handle 429s automatically. You need to parse Retry-After and sleep.

ResponseEntity<User> response = userApi.putUser(userId, body);
if (response.getStatusCode() == HttpStatus.TOO_MANY_REQUESTS) {
 int wait = Integer.parseInt(response.getHeaders().getFirst("Retry-After"));
 Thread.sleep(wait * 1000);
}

This is standard for bulk ops in Genesys. Don’t hammer the API without respecting the header.