moxm commented on issue #5464:
URL: https://github.com/apache/skywalking/issues/5464#issuecomment-690332151


   ### agent log:
   
   
   ERROR 2020-09-10 22:24:32:063 SkywalkingAgent-7-JVMService-consume-0 
JVMMetricsSender : send JVM metrics to Collector fail. 
   org.apache.skywalking.apm.dependencies.io.grpc.StatusRuntimeException: 
UNAVAILABLE: Channel shutdownNow invoked
        at 
org.apache.skywalking.apm.dependencies.io.grpc.stub.ClientCalls.toStatusRuntimeException(ClientCalls.java:240)
        at 
org.apache.skywalking.apm.dependencies.io.grpc.stub.ClientCalls.getUnchecked(ClientCalls.java:221)
        at 
org.apache.skywalking.apm.dependencies.io.grpc.stub.ClientCalls.blockingUnaryCall(ClientCalls.java:140)
        at 
org.apache.skywalking.apm.network.language.agent.v3.JVMMetricReportServiceGrpc$JVMMetricReportServiceBlockingStub.collect(JVMMetricReportServiceGrpc.java:158)
        at 
org.apache.skywalking.apm.agent.core.jvm.JVMMetricsSender.run(JVMMetricsSender.java:82)
        at 
org.apache.skywalking.apm.util.RunnableWithExceptionProtection.run(RunnableWithExceptionProtection.java:33)
        at 
java.util.concurrent.Executors$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)


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