moxm opened a new issue #5465:
URL: https://github.com/apache/skywalking/issues/5465


   Please answer these questions before submitting your issue.
   
   Why do you submit this issue?
    Bug
   Bug
   Which version of SkyWalking, OS and JRE?
   SkyWalking version: 8.1.0
   Docker version 19.03.4, build 9013bf583a
   OS: centos 7
   Application JDK: Oracle JDK 1.8
   
   Which company or project?
   
   What happened?
   ### dashboard: Issue occurs ( data missing) in the end though the data is 
correct at the beginning
   
   ##### oap log:
   Sep 10, 2020 1:29:42 PM io.grpc.netty.NettyServerTransport notifyTerminated
   INFO: Transport failed
   io.netty.handler.codec.http2.Http2Exception: Unexpected HTTP/1.x request: 
GET /
   at 
io.netty.handler.codec.http2.Http2Exception.connectionError(Http2Exception.java:103)
   at 
io.netty.handler.codec.http2.Http2ConnectionHandler$PrefaceDecoder.readClientPrefaceString(Http2ConnectionHandler.java:302)
   at 
io.netty.handler.codec.http2.Http2ConnectionHandler$PrefaceDecoder.decode(Http2ConnectionHandler.java:239)
   at 
io.netty.handler.codec.http2.Http2ConnectionHandler.decode(Http2ConnectionHandler.java:438)
   at 
io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:505)
   at 
io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:444)
   at 
io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:283)
   at 
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:374)
   at 
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:360)
   at 
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:352)
   at 
io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1422)
   at 
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:374)
   at 
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:360)
   at 
io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:931)
   at 
io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163)
   at 
io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:700)
   at 
io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:635)
   at 
io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:552)
   at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:514)
   at 
io.netty.util.concurrent.SingleThreadEventExecutor$6.run(SingleThreadEventExecutor.java:1044)
   at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
   at 
io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
   at java.lang.Thread.run(Thread.java:748)
   
   ##### 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)
   
   
   
![image](https://user-images.githubusercontent.com/10267892/92746125-8e48fe80-f3b5-11ea-86c6-09dcd4aab433.png)
   
![image](https://user-images.githubusercontent.com/10267892/92746191-9d2fb100-f3b5-11ea-837f-d1ec9ff379d9.png)
   
![image](https://user-images.githubusercontent.com/10267892/92746275-b6386200-f3b5-11ea-9aa3-967514b08e8e.png)
   
![image](https://user-images.githubusercontent.com/10267892/92746348-cbad8c00-f3b5-11ea-9738-5c5a8f20a4e9.png)
   


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