Felicite93 opened a new issue #4450: GRPCChannelManager : Create channel to fail URL: https://github.com/apache/skywalking/issues/4450 Please answer these questions before submitting your issue. - Why do you submit this issue? - [v] Question or discussion - [ ] Bug - [ ] Requirement - [ ] Feature or performance improvement ___ ### Question - What do you want to know? What is the cause? help me, thanks. ___ ### Bug - Which version of SkyWalking, OS and JRE? version: 6.6.0 OS: centos 4.14.123-111.109.amzn2.x86_64 JDK version: 1.8.0_121 - Which company or project? - What happen? I remove the apm-vertx-core-3.x-plugin-6.6.0.jar from the plugins ___ ### log DEBUG 2020-03-06 12:13:18:636 SkywalkingAgent-5-ServiceAndEndpointRegisterClient-0 ServiceAndEndpointRegisterClient : ServiceAndEndpointRegisterClient running, status:DISCONNECT. DEBUG 2020-03-06 12:13:21:583 SkywalkingAgent-2-GRPCChannelManager-0 GRPCChannelManager : Selected collector grpc service running, reconnect:true. ERROR 2020-03-06 12:13:21:584 SkywalkingAgent-2-GRPCChannelManager-0 GRPCChannelManager : Create channel to fail. java.lang.NullPointerException at org.apache.skywalking.apm.agent.core.remote.GRPCChannelManager.run(GRPCChannelManager.java:122) at org.apache.skywalking.apm.util.RunnableWithExceptionProtection.run(RunnableWithExceptionProtection.java:36) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) DEBUG 2020-03-06 12:13:21:585 SkywalkingAgent-2-GRPCChannelManager-0 GRPCChannelManager : Selected collector grpc service is not available. Wait 30 seconds to retry DEBUG 2020-03-06 12:13:21:638 SkywalkingAgent-5-ServiceAndEndpointRegisterClient-0 ServiceAndEndpointRegisterClient : ServiceAndEndpointRegisterClient running, status:DISCONNECT. >
---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected] With regards, Apache Git Services
