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

问题

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-context/hystrix.stream, I get all default values instead.

here is the hystrix config in my application.yaml

hystrix:
   command.StoreSubmission.execution.isolation.thread.timeoutInMilliseconds: 30000
   command.StoreSubmission.circuitBreaker.requestVolumeThreshold: 4
   command.StoreSubmission.circuitBreaker.sleepWindowInMilliseconds: 60000
   command.StoreSubmission.metrics.rollingStats.timeInMilliseconds: 180000
   collapser.StoreSubmission.maxRequestsInBatch: 1
   collapser.StoreSubmission.requestCache.enabled: FALSE
   threadpool.StoreSubmission.coreSize: 30
   threadpool.StoreSubmission.metrics.rollingStats.timeInMilliseconds: 180000

Here is what I see when I hit the url - localhost:port/app-context/hystrix.stream in browser [ this is same stream url used for hystrix dashboard ] -

data: {"type":"HystrixCommand","name":"storeSubmission","group":"StoreSubmission","currentTime":1435941064801,"isCircuitBreakerOpen":false,"errorPercentage":0,"errorCount":0,"requestCount":0,"rollingCountCollapsedRequests":0,"rollingCountExceptionsThrown":0,"rollingCountFailure":0,"rollingCountFallbackFailure":0,"rollingCountFallbackRejection":0,"rollingCountFallbackSuccess":0,"rollingCountResponsesFromCache":0,"rollingCountSemaphoreRejected":0,"rollingCountShortCircuited":0,"rollingCountSuccess":0,"rollingCountThreadPoolRejected":0,"rollingCountTimeout":0,"currentConcurrentExecutionCount":0,"latencyExecute_mean":0,"latencyExecute":{"0":0,"25":0,"50":0,"75":0,"90":0,"95":0,"99":0,"99.5":0,"100":0},"latencyTotal_mean":0,"latencyTotal":{"0":0,"25":0,"50":0,"75":0,"90":0,"95":0,"99":0,"99.5":0,"100":0},"propertyValue_circuitBreakerRequestVolumeThreshold":20,"propertyValue_circuitBreakerSleepWindowInMilliseconds":5000,"propertyValue_circuitBreakerErrorThresholdPercentage":50,"propertyValue_circuitBreakerForceOpen":false,"propertyValue_circuitBreakerForceClosed":false,"propertyValue_circuitBreakerEnabled":true,"propertyValue_executionIsolationStrategy":"THREAD","propertyValue_executionIsolationThreadTimeoutInMilliseconds":1000,"propertyValue_executionIsolationThreadInterruptOnTimeout":true,"propertyValue_executionIsolationThreadPoolKeyOverride":null,"propertyValue_executionIsolationSemaphoreMaxConcurrentRequests":10,"propertyValue_fallbackIsolationSemaphoreMaxConcurrentRequests":10,"propertyValue_metricsRollingStatisticalWindowInMilliseconds":10000,"propertyValue_requestCacheEnabled":true,"propertyValue_requestLogEnabled":true,"reportingHosts":1}

data: {"type":"HystrixThreadPool","name":"StoreSubmission","currentTime":1435941064801,"currentActiveCount":0,"currentCompletedTaskCount":35,"currentCorePoolSize":30,"currentLargestPoolSize":30,"currentMaximumPoolSize":30,"currentPoolSize":30,"currentQueueSize":0,"currentTaskCount":35,"rollingCountThreadsExecuted":0,"rollingMaxActiveThreads":0,"propertyValue_queueSizeRejectionThreshold":5,"propertyValue_metricsRollingStatisticalWindowInMilliseconds":180000,"reportingHosts":1}

The problem is with hystrix command & collapser properties, where as threadpool properties are set correctly. I have got following annotations in my @configuration class -

@EnableAutoConfiguration(exclude=MongoAutoConfiguration.class)
@EnableHystrix
@EnableHystrixDashboard

Has someone tried configuring hystrix command properties using application.yaml in thier Spring-Boot application, can help please?

回答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.

来源：https://stackoverflow.com/questions/31211685/configuring-hystrix-command-properties-using-application-yaml-in-spring-boot-app

标签

spring-boot

spring-cloud

hystrix