Read timed out when using Hystrix on RPC - spring-cloud

Question

I use #HystrixCommand to package a RPC，if not use Hystrix it will run normally。This RPC is not a microservice instead a normall http
#Override
#HystrixCommand(commandProperties = {#HystrixProperty( name ="execution.isolation.thread.timeoutInMilliseconds",value="5000")},fallbackMethod="doAccountQueryFallback")
public CBIBAcctQueryResponseVO doAccountQuery(#RequestBody CBIBAcctQueryRequestVO cbibAcctQueryRequestVO) {
//initialize message
// ....
try {
responseMessage = (AcctTypeInqResponse) HTTPUtil.sendHttp("http://********", inqRequest, *****.class);
} catch (RuntimeException e) {
//...
}
logger.debug("success");// 1
return cbibAcctQueryResponseVO;
}
public CBIBAcctQueryResponseVO doAccountQueryFallback(#RequestBody CBIBAcctQueryRequestVO cbibAcctQueryRequestVO){
//....
}
the error infomation like:
feign.RetryableException: Read timed out executing POST http://****/doAccountQuery
at feign.FeignException.errorExecuting(FeignException.java:67)
at feign.SynchronousMethodHandler.executeAndDecode(SynchronousMethodHandler.java:104)
at feign.SynchronousMethodHandler.invoke(SynchronousMethodHandler.java:76)
at feign.ReflectiveFeign$FeignInvocationHandler.invoke(ReflectiveFeign.java:103)
at com.sun.proxy.$Proxy153.doAccountQuery(Unknown Source)
...
...
Caused by: java.net.SocketTimeoutException: Read timed out
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.read(SocketInputStream.java:150)
at java.net.SocketInputStream.read(SocketInputStream.java:121)
I change the value of the #HystrixCommand properties. Though I set a long time it will also show this exception,do // 1 and do not call fallback method.
When I set 100 ，it show this exception,do // 1 and call fallback method.
I suspect is it send some times?
When I set 1 ，it does not show this exception and call fallback method.
it's actually expected.
the doAccountQuery is a mircoservice and there is a normal http request in the doAccountQuery. I want to package this normal http request with Hystrix only(not use feign).but once i add # #HystrixCommand on the doAccountQuery.the microservice doAccountQuery itself will timed out,but it also will return the result (retransmission？ only the first transmission timed out ? I dont know)
1 also try
ribbon:
ReadTimeout: 60000
ConnectTimeout: 60000
but useless
Besides sometimes the exception will become
connect timed out and not do //1 and even not call fallback method!
I want have some debug suggest thanks!