About sending renew request to eureka server

[VainEffort]

• I have searched the issues of this repository and believe that this is not a duplicate.

Ⅰ. Issue Description

Method "fescar-discovery: EurekaRegistryServiceImpl-getInstanceId()" builds the instanceId with pattern "%s/%s:%d" (appName, ipaddress, port).
Eureka client(DiscoveryClient-renew()) sends renew request to the url: myConfigEurekServerAddress/eureka/apps//

There is a "/" in instanceId, so the eureka client cannot succeed to renew.

Ⅱ. Describe what happened

If there is an exception, please attach the exception trace:

Just paste your stack trace here!

Ⅲ. Describe what you expected to happen

renew success.

Ⅳ. How to reproduce it (as minimally and precisely as possible)

1. xxx
2. xxx
3. xxx

Ⅴ. Anything else we need to know?

Ⅵ. Environment:

• JDK version :
• OS :
• Others: my eurke server version is 1.6.2

[slievrly]

@sunrui849

[sunrui849]

i see the renew method, you are true，i will change it