i test again, proceed as follows:
1. i use "http://192.168.1.12:51041/test" to test , but not connect
2. i use pc to ping vm vmware (ping ok)
3. run B4iBuildServer.jar on vm
4. run "sudo lsof -i:51041" to test 51041 port (Port not opened)
5. I write a test program to open 51041 port
6 run "sudo lsof -i:51041" (Port is opened)