Feign 两个坑

技术交流
1

1：@GetMapping Feign 不支持此get注解，必须使用ReqeustMapping
2：@Pathvariable() 注解，必须给@Pathvariable("id")

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解决Feign第一次请求timeout问题

java.util.concurrent.TimeoutException: null
    at com.netflix.hystrix.AbstractCommand.handleTimeoutViaFallback(AbstractCommand.java:980) ~[hystrix-core-1.5.6.jar:1.5.6]
    at com.netflix.hystrix.AbstractCommand.access$500(AbstractCommand.java:59) ~[hystrix-core-1.5.6.jar:1.5.6]
    at com.netflix.hystrix.AbstractCommand$12.call(AbstractCommand.java:595) ~[hystrix-core-1.5.6.jar:1.5.6]
    at com.netflix.hystrix.AbstractCommand$12.call(AbstractCommand.java:587) ~[hystrix-core-1.5.6.jar:1.5.6]
    at rx.internal.operators.OperatorOnErrorResumeNextViaFunction$4.onError(OperatorOnErrorResumeNextViaFunction.java:140) ~[rxjava-1.1.10.jar:1.1.10]
    at rx.internal.operators.OnSubscribeDoOnEach$DoOnEachSubscriber.onError(OnSubscribeDoOnEach.java:87) ~[rxjava-1.1.10.jar:1.1.10]
    at rx.internal.operators.OnSubscribeDoOnEach$DoOnEachSubscriber.onError(OnSubscribeDoOnEach.java:87) ~[rxjava-1.1.10.jar:1.1.10]
    at com.netflix.hystrix.AbstractCommand$HystrixObservableTimeoutOperator$1.run(AbstractCommand.java:1121) ~[hystrix-core-1.5.6.jar:1.5.6]
    at com.netflix.hystrix.strategy.concurrency.HystrixContextRunnable$1.call(HystrixContextRunnable.java:41) ~[hystrix-core-1.5.6.jar:1.5.6]
    at com.netflix.hystrix.strategy.concurrency.HystrixContextRunnable$1.call(HystrixContextRunnable.java:37) ~[hystrix-core-1.5.6.jar:1.5.6]
    at com.netflix.hystrix.strategy.concurrency.HystrixContextRunnable.run(HystrixContextRunnable.java:57) ~[hystrix-core-1.5.6.jar:1.5.6]
    at com.netflix.hystrix.AbstractCommand$HystrixObservableTimeoutOperator$2.tick(AbstractCommand.java:1138) ~[hystrix-core-1.5.6.jar:1.5.6]
    at com.netflix.hystrix.util.HystrixTimer$1.run(HystrixTimer.java:99) ~[hystrix-core-1.5.6.jar:1.5.6]
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[na:1.8.0_101]
    at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308) ~[na:1.8.0_101]
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180) ~[na:1.8.0_101]
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294) ~[na:1.8.0_101]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) ~[na:1.8.0_101]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) ~[na:1.8.0_101]
    at java.lang.Thread.run(Thread.java:745) [na:1.8.0_101]

2017-05-15 20:40:21.407  INFO 5108 --- [erListUpdater-0] c.netflix.config.ChainedDynamicProperty  : Flipping property: springcloud-userservcie.ribbon.ActiveConnectionsLimit to use NEXT property: niws.loadbalancer.availabilityFilteringRule.activeConnectionsLimit = 2147483647

解决方法

#索性禁用Feign的Hystrix
feign.hystrix.enabled=false