carlvine500 opened a new pull request #794: bugfix:no data collected after application started 20+seconds URL: https://github.com/apache/incubator-skywalking/pull/794 ### Bug fix - Bug description. skywalking can't collect data after application started 20+ seconds .eg : ``` public class JedisTest { public static void main(String[] args) throws InterruptedException { Jedis j = new Jedis("xx.xx.xx.xx", 6379); for (int i = 0; i < 20; i++) { Thread.sleep(1000L); String users = j.get("users"); System.out.println(users); } LockSupport.park(); } } ``` - reason? 1.DiscoveryRestServiceClient.run() init run in 0 seconds, interval is 60 seconds. 2.GRPCChannelManager.run() init run in 0 seconds, interval is 30 seconds. 3.ServiceManager.bootedServices is HashMap , GRPCChannelManager.run() always before DiscoveryRestServiceClient.run() - How to fix? 1.ServiceManager.bootedServices changed to LinckedHashMap , to make sure DiscoveryRestServiceClient.run() before GRPCChannelManager.run() 2.DiscoveryRestServiceClient.run() sychronized instead of asychronized
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