Hystrix timeout exception

Hystrix Timeout Exception

[ERROR] 2017-08-19 09:20:57,545 unexpected exception occurred. [] [http-nio-8110-exec-1] 
java.lang.reflect.UndeclaredThrowableException: null
        at com.sun.proxy.$Proxy135.fetchPaymentToken(Unknown Source)
        at xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx(xxxxxxxxxxxxxxxxxxxxx.java:87)
        at xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx(xxxxxxxxxxxxxxxxxxxxxxxxxx.java:76)
        at sun.reflect.GeneratedMethodAccessor215.invoke(Unknown Source)
	      ...
	      ...
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.util.concurrent.TimeoutException: null
        at com.netflix.hystrix.AbstractCommand.handleTimeoutViaFallback(AbstractCommand.java:980)
        at com.netflix.hystrix.AbstractCommand.access$500(AbstractCommand.java:59)
        at com.netflix.hystrix.AbstractCommand$12.call(AbstractCommand.java:595)
        at com.netflix.hystrix.AbstractCommand$12.call(AbstractCommand.java:587)
	      ...
	      ...
        at com.netflix.hystrix.util.HystrixTimer$1.run(HystrixTimer.java:99)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        ... 1 common frames omitted