K8s pod keeps getting restarted when http client object creation is within resource function

[nilushancosta]

Description:
I deployed the following ballerina passthrough service on Kubernetes. JMeter was used as the client and a Netty echo service as the backend.

import ballerina/http;
import ballerina/log;

@http:ServiceConfig {
    basePath: "/"
}
service testapi1 on new http:Listener(8090) {

    @http:ResourceConfig {
        methods: ["POST"],
        path: "/api1"
    }
    resource function api1(http:Caller caller, http:Request req) {
        http:Client API1 = new("http://<NettyIP>:8600");
        var response = API1->forward("/", req);

        if (response is http:Response) {
            var result = caller->respond(response);
        } else {
            log:printError("Error at h1c_h1c_passthrough", err = response);
            http:Response res = new;
            res.statusCode = 500;
            res.setPayload(response.message());
            var result = caller->respond(res);
        }
    }
}

This resulted in the pod being restarted even for low concurrency tests (concurrency of 5).
However when I move http:Client API1 = new("http://<NettyIP>:8600"); out of the service as follows, the service works without an issue.

import ballerina/http;
import ballerina/log;

http:Client API1 = new("http://<NettyIP>:8600");

@http:ServiceConfig {
    basePath: "/"
}
<code omitted>

Steps to reproduce:
Run the passthrough service given above with the specified line in the resource function block and outside the service block

Affected Versions:
Swan Lake Preview 1

OS, DB, other environment details and versions:
Kubernetes version - 1.16

Resource requests and limits are as follows

apiVersion: v1
kind: LimitRange
metadata:
  name: lr-cpu-mem
spec:
  limits:
  - default:
      cpu: 500m
      memory: 768Mi
    defaultRequest:
      cpu: 100m
      memory: 256Mi
    type: Container

[malithjayasinghe]

When repeating the tests please ensure that you apply the same resource limits. The observability should be on

[Bhashinee]

Fixed with #24738