Add Delay chaos in Istio does not actually injects delay in the service

[SapnaGirdhani1]

Hi Team,

I used chaostoolkit-istio and implemented add_delay_fault to inject delay in one of my services ( via its virtual-service). I get response code as 200 after calling add_delay_fault. Which confirms that fault is injected or delay is added. But when I call my service, I don't see any impact of delay.Service responds immediately.
Let me explain my use case.

Scenario : My micro service is deployed on IBM Cloud Kubernetes cluster ( Istio Enabled). This service has one Virtual service associated. I am running chaos-toolkit and injecting a delay (300 sec) by providing my virtual-service name in add_delay_fault function. I get a response code of 200.
My service is associated with Istio Ingress gateway. I hit my service via browser and get immediate response, no impact of delay noticed.

Please help.Thanks!