Configuring hystrix command properties using application.yaml in Spring-Boot application

Question

I am having same issue, where i am trying to override the hystrix properties in application.yaml. When I run the app & check the properties with localhost:port/app-conte

Answer 1

The main problem was that, I was using groupKey value instead of commandKey value to define the properties. The wiki page for these configuration properties - https://github.com/Netflix/Hystrix/wiki/Configuration#intro says -

hystrix.command.HystrixCommandKey.execution.isolation.thread.timeoutInMilliseconds

Replace the HystrixCommandKey portion of the property with the value you set for commandkey.

hystrix.threadpool.HystrixThreadPoolKey.coreSize

Replace the HystrixThreadPoolKey portion of the property with the value you set for threadPoolKey.

Here is how I define both commandKey & threadPoolKey over the method wrapped by HystrixCommand -

@HystrixCommand(groupKey = "StoreSubmission", commandKey = "StoreSubmission", threadPoolKey = "StoreSubmission")
public String storeSubmission(ReturnType returnType, InputStream is, String id) {
}

You can actually define both command & threadpool properties on the method within @HystixCommand annotation.

@HystrixCommand(groupKey = "StoreSubmission", commandKey = "StoreSubmission", threadPoolKey = "StoreSubmission", commandProperties = {
        @HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds", value = "30000"),
        @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold", value = "4"),
        @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds", value = "60000"),
        @HystrixProperty(name = "metrics.rollingStats.timeInMilliseconds", value = "180000") }, threadPoolProperties = {
        @HystrixProperty(name = "coreSize", value = "30"),
        @HystrixProperty(name = "metrics.rollingStats.timeInMilliseconds", value = "180000") })
public String storeSubmission(ReturnType returnType, InputStream is, String id) {
}

I guess the best way to define these properties is in externalized application.yaml, that way you can control it better & change them for different environments.