Predictive Routing queue depth spikes during JMeter load

Genesys Cloud Routing
1

Stuck on Predictive Routing logic during a 200-concurrent user test from ap-southeast-1. The GET /api/v2/routing/queues/{queueId}/stats endpoint returns valid data, but the actual answered rate drops to zero after 5 minutes. No explicit errors in the Architect logs, just silent failures. Is there a hidden WebSocket limit for PR agents?

[429] Too Many Requests: Rate limit exceeded for routing queue statistics endpoint

Using JMeter 5.4.2 with standard WebSampler. Any config tweaks for high throughput?

2

Is there a hidden WebSocket limit for PR agents?

I usually solve this by implementing exponential backoff in the JMeter HTTP Request Default Configurator to handle the 429s gracefully.

<HTTPSamplerProxy guiclass="HttpTestSampleGui" testclass="HTTPSamplerProxy" testname="Queue Stats">
 <boolProp name="HTTPSampler.POST_BODY_MODE">true</boolProp>
 <elementProp name="HTTPsampler.Arguments" elementType="Arguments">
 <collectionProp name="Arguments.arguments"/>
 </elementProp>
 <stringProp name="HTTPSampler.domain">api.mypurecloud.com</stringProp>
 <stringProp name="HTTPSampler.port">443</stringProp>
 <stringProp name="HTTPSampler.protocol">https</stringProp>
 <stringProp name="HTTPSampler.path">/api/v2/routing/queues/${queueId}/stats</stringProp>
 <stringProp name="HTTPSampler.method">GET</stringProp>
</HTTPSamplerProxy>