dubbo2.7.8 broadcast and injvm

[cwt9562]

Environment

• Dubbo version: 2.7.8
• Operating System version: windows10 centos7
• Java version: 8

Steps to reproduce this issue

1. i use cluster = broadcast to evict my cache, and i found broadcast was not working
2. in my case, @DubboService and @DubboReference are in the same application, and this application are running in 3 servers.
3. dubbo only call which @DubboService in the same java process
4. i guess it cause by injvm, so i set injvm to false, like @DubboReference(cluster = "broadcast", injvm = false). and it worked. dubbo call services at both local and remote.

and in dubbo 2.7.5, i dont need to set injvm to false, when i want to use broadcast
it happend after upgraded to dubbo 2.7.8

[cwt9562]

my fault, dubbo 2.7.5 also has this problem

[xiaoheng1]

let me have a look.