[GitHub] [skywalking] g29times opened a new issue #3539: Agent services not detected

[GitBox <gi...@apache.org>]

g29times opened a new issue #3539: Agent services not detected
URL: https://github.com/apache/skywalking/issues/3539
 
 
   Please answer these questions before submitting your issue.
   
   - Why do you submit this issue?
   - [ X ] Question or discussion
   - [ ] Bug
   - [ ] Requirement
   - [ ] Feature or performance improvement
   
   ___
   ### Question
   - What do you want to know?
   [CN]无法监控到后端服务 [EN] Agent services not detected
   Env: ubuntu 18 , 2 Core, 8G Mem
   Sky BackEnd ：http://47.244.220.225:8080/
   Agent BackEnd(on same server) ：http://47.244.220.225:8013/welcome
   (user:'user'/password:'password') 
   ES V7.2 (on same server) ：http://47.244.220.225:9200/
   ___
   ### Bug
   - Which version of SkyWalking, OS and JRE?
   6.4.0
   - Which company or project?
   
   - What happen?
   If possible, provide a way for reproducing the error. e.g. demo application, component version.
   Agent services not detected on Sky UI (8080)
   ___
   ### Requirement or improvement
   - Please describe about your requirements or improvement suggestions.
   1 Where could I locate skywalk itself's log on linux
   2 What's the use of port 11800 12800? I don't see any ports listening using 'netstat -anp | grep 12800' after Sky started.
   3 What do i need to config for agent using spring boot with a "java -jar" fashion?  Do I need to specify like 'java -javaagent:/path-to/skywalking-agent.jar 
        -Dskywalking.agent.service_name=trace-api 
        -Dskywalking.collector.backend_service=localhost:**myAgentPort** 
        -jar xxx.jar'
   

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