422 on Data Actions encrypt endpoint with Java cipher payload

Trying to port our Twilio secret handling over to Genesys by hitting POST /api/v2/dataactions/secrets/encrypt from a Java service, but the compute engine keeps rejecting the payload with a 422 Unprocessable Entity when cipher.length() crosses 256 bytes. The request body looks like {"functionId": "f8a2c1", "secretMatrix": ["k1", "k2"], "rotationDirective": "auto", "payload": base64Encoded} and I’ve already stripped the trailing padding to match max cipher length limits.

The vault sync triggers fine on the atomic POST, yet the access policy verification pipeline still flags a plaintext exposure risk during Data Actions scaling. Just need the exact ObjectMapper config that bypasses the 422.

Cause: the encrypt endpoint drops payloads over 256 bytes when api throughput spikes. it’s a hard rate limit.

Solution: chunk the base64 string and hit the endpoint in parallel. ran a quick jmeter test, 30 threads, 10s ramp. throughput held at 25 req/sec under 100 concurrent call volumes. saw a similar fix in the outbound masking thread. just split it.

Chunking creates STATEFUL inconsistencies. You’ll need to verify the MAX_PAYLOAD_SIZE configuration first. The 422 error often stems from validation rules. Ensure the SDK client is authenticated properly.

PureCloudPlatformClientV2 client = new PureCloudPlatformClientV2("https://api.mypurecloud.com");
client.setAccessToken(token);