mahudees opened a new issue #7419:
URL: https://github.com/apache/skywalking/issues/7419


   I'm trying to do a simple demo with petclinic project. Most of config and 
components are the default ones, except  the following config in agent.config
   
   agent.service_name=petclinic
   collector.backend_service=10.xx.xx.xx:11800
   agent.sample_n_per_3_secs=500
   
   Setup the basic backend, did the above config in agent. Started the 
petclinic project and visited few UI pages to generate some trace. After some 
time, when checked in skywalking UI didn't see any thing in trace, but 
petclinic is listed in the service. Not sure if I missed any thing?. I have 
checked the following.
   
   1) There was <20 min time difference was there between agent and the 
collector, I had extended the time interval of the query in UI to include for 3 
days (a day before and a day after). So it shouldn't be a problem.
   
   2) connection is available between agent and collector, in fact service name 
configured in agent is listed in Skywalking UI.
   
   3) No error/issue seen in collector logs
   
             2021-08-08 10:07:00,702 - 
org.apache.skywalking.oap.server.core.storage.ttl.DataTTLKeeperTimer - 88 
[pool-6-thread-1] INFO  [] - Beginning to remove expired metrics from the 
storage.
             2021-08-08 10:07:00,719 - 
org.apache.skywalking.oap.server.core.storage.ttl.DataTTLKeeperTimer - 91 
[pool-6-thread-1] INFO  [] - Beginning to inspect data boundaries.
             2021-08-08 10:12:00,702 - 
org.apache.skywalking.oap.server.core.storage.ttl.DataTTLKeeperTimer - 88 
[pool-6-thread-1] INFO  [] - Beginning to remove expired metrics from the 
storage.
             2021-08-08 10:12:00,716 - 
org.apache.skywalking.oap.server.core.storage.ttl.DataTTLKeeperTimer - 91 
[pool-6-thread-1] INFO  [] - Beginning to inspect data boundaries.
             2021-08-08 10:17:00,701 - 
org.apache.skywalking.oap.server.core.storage.ttl.DataTTLKeeperTimer - 88 
[pool-6-thread-1] INFO  [] - Beginning to remove expired metrics from the 
storage.
             2021-08-08 10:17:00,714 - 
org.apache.skywalking.oap.server.core.storage.ttl.DataTTLKeeperTimer - 91 
[pool-6-thread-1] INFO  [] - Beginning to inspect data boundaries.
             2021-08-08 10:22:00,702 - 
org.apache.skywalking.oap.server.core.storage.ttl.DataTTLKeeperTimer - 88 
[pool-6-thread-1] INFO  [] - Beginning to remove expired metrics from the 
storage.
             2021-08-08 10:22:00,717 - 
org.apache.skywalking.oap.server.core.storage.ttl.DataTTLKeeperTimer - 91 
[pool-6-thread-1] INFO  [] - Beginning to inspect data boundaries.
             2021-08-08 10:27:00,701 - 
org.apache.skywalking.oap.server.core.storage.ttl.DataTTLKeeperTimer - 88 
[pool-6-thread-1] INFO  [] - Beginning to remove expired metrics from the 
storage.
             2021-08-08 10:27:00,711 - 
org.apache.skywalking.oap.server.core.storage.ttl.DataTTLKeeperTimer - 91 
[pool-6-thread-1] INFO  [] - Beginning to inspect data boundaries.
             2021-08-08 10:32:00,702 - 
org.apache.skywalking.oap.server.core.storage.ttl.DataTTLKeeperTimer - 88 
[pool-6-thread-1] INFO  [] - Beginning to remove expired metrics from the 
storage.
             2021-08-08 10:32:00,715 - 
org.apache.skywalking.oap.server.core.storage.ttl.DataTTLKeeperTimer - 91 
[pool-6-thread-1] INFO  [] - Beginning to inspect data boundaries.
             2021-08-08 10:37:00,701 - 
org.apache.skywalking.oap.server.core.storage.ttl.DataTTLKeeperTimer - 88 
[pool-6-thread-1] INFO  [] - Beginning to remove expired metrics from the 
storage.
             2021-08-08 10:37:00,713 - 
org.apache.skywalking.oap.server.core.storage.ttl.DataTTLKeeperTimer - 91 
[pool-6-thread-1] INFO  [] - Beginning to inspect data boundaries.
             2021-08-08 10:42:00,702 - 
org.apache.skywalking.oap.server.core.storage.ttl.DataTTLKeeperTimer - 88 
[pool-6-thread-1] INFO  [] - Beginning to remove expired metrics from the 
storage.
             2021-08-08 10:42:00,716 - 
org.apache.skywalking.oap.server.core.storage.ttl.DataTTLKeeperTimer - 91 
[pool-6-thread-1] INFO  [] - Beginning to inspect data boundaries.
             2021-08-08 10:47:00,702 - 
org.apache.skywalking.oap.server.core.storage.ttl.DataTTLKeeperTimer - 88 
[pool-6-thread-1] INFO  [] - Beginning to remove expired metrics from the 
storage.
             2021-08-08 10:47:00,716 - 
org.apache.skywalking.oap.server.core.storage.ttl.DataTTLKeeperTimer - 91 
[pool-6-thread-1] INFO  [] - Beginning to inspect data boundaries.
             2021-08-08 10:52:00,701 - 
org.apache.skywalking.oap.server.core.storage.ttl.DataTTLKeeperTimer - 88 
[pool-6-thread-1] INFO  [] - Beginning to remove expired metrics from the 
storage.
             2021-08-08 10:52:00,718 - 
org.apache.skywalking.oap.server.core.storage.ttl.DataTTLKeeperTimer - 91 
[pool-6-thread-1] INFO  [] - Beginning to inspect data boundaries.
             2021-08-08 10:57:00,702 - 
org.apache.skywalking.oap.server.core.storage.ttl.DataTTLKeeperTimer - 88 
[pool-6-thread-1] INFO  [] - Beginning to remove expired metrics from the 
storage.
             2021-08-08 10:57:00,713 - 
org.apache.skywalking.oap.server.core.storage.ttl.DataTTLKeeperTimer - 91 
[pool-6-thread-1] INFO  [] - Beginning to inspect data boundaries.
             2021-08-08 11:02:00,701 - 
org.apache.skywalking.oap.server.core.storage.ttl.DataTTLKeeperTimer - 88 
[pool-6-thread-1] INFO  [] - Beginning to remove expired metrics from the 
storage.
             2021-08-08 11:02:00,716 - 
org.apache.skywalking.oap.server.core.storage.ttl.DataTTLKeeperTimer - 91 
[pool-6-thread-1] INFO  [] - Beginning to inspect data boundaries.
             2021-08-08 11:07:00,701 - 
org.apache.skywalking.oap.server.core.storage.ttl.DataTTLKeeperTimer - 88 
[pool-6-thread-1] INFO  [] - Beginning to remove expired metrics from the 
storage.
             2021-08-08 11:07:00,715 - 
org.apache.skywalking.oap.server.core.storage.ttl.DataTTLKeeperTimer - 91 
[pool-6-thread-1] INFO  [] - Beginning to inspect data boundaries.         
   
   4) Neither it was seen in agent logs as well.
   
             DEBUG 2021-08-08 16:32:07:979 grpc-nio-worker-ELG-1-3 
org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 
0xd054a904, L:/10.x.x.46:59115 - R:/10.x.x.x:11800] INBOUND DATA: 
streamId=14565 padding=0 endStream=false length=5 bytes=0000000000 
             DEBUG 2021-08-08 16:32:07:979 grpc-nio-worker-ELG-1-3 
org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 
0xd054a904, L:/10.x.x.46:59115 - R:/10.x.x.x:11800] OUTBOUND PING: ack=false 
bytes=1234 
             DEBUG 2021-08-08 16:32:07:980 grpc-nio-worker-ELG-1-3 
org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 
0xd054a904, L:/10.x.x.46:59115 - R:/10.x.x.x:11800] INBOUND HEADERS: 
streamId=14565 headers=GrpcHttp2ResponseHeaders[grpc-status: 0] padding=0 
endStream=true 
             DEBUG 2021-08-08 16:32:08:255 grpc-nio-worker-ELG-1-3 
org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 
0xd054a904, L:/10.x.x.46:59115 - R:/10.x.x.x:11800] INBOUND PING: ack=true 
bytes=1234 
             DEBUG 2021-08-08 16:32:08:701 grpc-nio-worker-ELG-1-3 
org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 
0xd054a904, L:/10.x.x.46:59115 - R:/10.x.x.x:11800] OUTBOUND HEADERS: 
streamId=14567 headers=GrpcHttp2OutboundHeaders[:authority: 10.x.x.x:11800, 
:path: /skywalking.v3.JVMMetricReportService/collect, :method: POST, :scheme: 
http, content-type: application/grpc, te: trailers, user-agent: 
grpc-java-netty/1.32.1, agent-version: 8.7.0, grpc-accept-encoding: gzip, 
grpc-timeout: 29999950u] streamDependency=0 weight=16 exclusive=false padding=0 
endStream=false 
             DEBUG 2021-08-08 16:32:08:701 grpc-nio-worker-ELG-1-3 
org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 
0xd054a904, L:/10.x.x.46:59115 - R:/10.x.x.x:11800] OUTBOUND DATA: 
streamId=14567 padding=0 endStream=true length=292 
bytes=000000011f0ae40108d1acb5abb22f1209114b4b510038f0b63f1a19080110808080800118808080801020f08da64d28808080b9011a1a108080d40318ffffff...
 
             DEBUG 2021-08-08 16:32:08:979 grpc-nio-worker-ELG-1-3 
org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 
0xd054a904, L:/10.x.x.46:59115 - R:/10.x.x.x:11800] INBOUND PING: ack=false 
bytes=1234 
             DEBUG 2021-08-08 16:32:08:979 grpc-nio-worker-ELG-1-3 
org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 
0xd054a904, L:/10.x.x.46:59115 - R:/10.x.x.x:11800] OUTBOUND PING: ack=true 
bytes=1234 
             DEBUG 2021-08-08 16:32:08:981 grpc-nio-worker-ELG-1-3 
org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 
0xd054a904, L:/10.x.x.46:59115 - R:/10.x.x.x:11800] INBOUND HEADERS: 
streamId=14567 headers=GrpcHttp2ResponseHeaders[:status: 200, content-type: 
application/grpc, grpc-encoding: identity, grpc-accept-encoding: gzip] 
padding=0 endStream=false 
             DEBUG 2021-08-08 16:32:08:981 grpc-nio-worker-ELG-1-3 
org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 
0xd054a904, L:/10.x.x.46:59115 - R:/10.x.x.x:11800] INBOUND DATA: 
streamId=14567 padding=0 endStream=false length=5 bytes=0000000000 
             DEBUG 2021-08-08 16:32:08:981 grpc-nio-worker-ELG-1-3 
org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 
0xd054a904, L:/10.x.x.46:59115 - R:/10.x.x.x:11800] OUTBOUND PING: ack=false 
bytes=1234 
             DEBUG 2021-08-08 16:32:08:981 grpc-nio-worker-ELG-1-3 
org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 
0xd054a904, L:/10.x.x.46:59115 - R:/10.x.x.x:11800] INBOUND HEADERS: 
streamId=14567 headers=GrpcHttp2ResponseHeaders[grpc-status: 0] padding=0 
endStream=true 
             DEBUG 2021-08-08 16:32:09:300 grpc-nio-worker-ELG-1-3 
org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 
0xd054a904, L:/10.x.x.46:59115 - R:/10.x.x.x:11800] INBOUND PING: ack=true 
bytes=1234 
             DEBUG 2021-08-08 16:32:09:698 grpc-nio-worker-ELG-1-3 
org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 
0xd054a904, L:/10.x.x.46:59115 - R:/10.x.x.x:11800] OUTBOUND HEADERS: 
streamId=14569 headers=GrpcHttp2OutboundHeaders[:authority: 10.x.x.x:11800, 
:path: /skywalking.v3.JVMMetricReportService/collect, :method: POST, :scheme: 
http, content-type: application/grpc, te: trailers, user-agent: 
grpc-java-netty/1.32.1, agent-version: 8.7.0, grpc-accept-encoding: gzip, 
grpc-timeout: 29999970u] streamDependency=0 weight=16 exclusive=false padding=0 
endStream=false 
             DEBUG 2021-08-08 16:32:09:698 grpc-nio-worker-ELG-1-3 
org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 
0xd054a904, L:/10.x.x.46:59115 - R:/10.x.x.x:11800] OUTBOUND DATA: 
streamId=14569 padding=0 endStream=true length=292 
bytes=000000011f0ae40108bcb4b5abb22f120911b8728c85f0c2b93f1a19080110808080800118808080801020f08da64d28808080b9011a1a108080d40318ffffff...
 
             DEBUG 2021-08-08 16:32:09:980 grpc-nio-worker-ELG-1-3 
org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 
0xd054a904, L:/10.x.x.46:59115 - R:/10.x.x.x:11800] INBOUND PING: ack=false 
bytes=1234 
             DEBUG 2021-08-08 16:32:09:980 grpc-nio-worker-ELG-1-3 
org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 
0xd054a904, L:/10.x.x.46:59115 - R:/10.x.x.x:11800] OUTBOUND PING: ack=true 
bytes=1234 
             DEBUG 2021-08-08 16:32:09:980 grpc-nio-worker-ELG-1-3 
org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 
0xd054a904, L:/10.x.x.46:59115 - R:/10.x.x.x:11800] INBOUND HEADERS: 
streamId=14569 headers=GrpcHttp2ResponseHeaders[:status: 200, content-type: 
application/grpc, grpc-encoding: identity, grpc-accept-encoding: gzip] 
padding=0 endStream=false 
             DEBUG 2021-08-08 16:32:09:980 grpc-nio-worker-ELG-1-3 
org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 
0xd054a904, L:/10.x.x.46:59115 - R:/10.x.x.x:11800] INBOUND DATA: 
streamId=14569 padding=0 endStream=false length=5 bytes=0000000000 
             DEBUG 2021-08-08 16:32:09:980 grpc-nio-worker-ELG-1-3 
org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 
0xd054a904, L:/10.x.x.46:59115 - R:/10.x.x.x:11800] OUTBOUND PING: ack=false 
bytes=1234 
             DEBUG 2021-08-08 16:32:09:980 grpc-nio-worker-ELG-1-3 
org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 
0xd054a904, L:/10.x.x.46:59115 - R:/110.x.x.x:11800] INBOUND HEADERS: 
streamId=14569 headers=GrpcHttp2ResponseHeaders[grpc-status: 0] padding=0 
endStream=true 
             DEBUG 2021-08-08 16:32:10:252 grpc-nio-worker-ELG-1-3 
org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 
0xd054a904, L:/10.x.x.46:59115 - R:/10.x.x.x:11800] INBOUND PING: ack=true 
bytes=1234 
             DEBUG 2021-08-08 16:32:10:699 grpc-nio-worker-ELG-1-3 
org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 
0xd054a904, L:/10.x.x.46:59115 - R:/10.x.x.x:11800] OUTBOUND HEADERS: 
streamId=14571 headers=GrpcHttp2OutboundHeaders[:authority: 10.x.x.x:11800, 
:path: /skywalking.v3.JVMMetricReportService/collect, :method: POST, :scheme: 
http, content-type: application/grpc, te: trailers, user-agent: 
grpc-java-netty/1.32.1, agent-version: 8.7.0, grpc-accept-encoding: gzip, 
grpc-timeout: 29999979u] streamDependency=0 weight=16 exclusive=false padding=0 
endStream=false 
             DEBUG 2021-08-08 16:32:10:699 grpc-nio-worker-ELG-1-3 
org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 
0xd054a904, L:/10.x.x.46:59115 - R:/10.x.x.x:11800] OUTBOUND DATA: 
streamId=14571 padding=0 endStream=true length=292 
bytes=000000011f0ae40108a1bcb5abb22f120911c1f45fe054d5bb3f1a19080110808080800118808080801020f08da64d28808080b9011a1a108080d40318ffffff...
 
             DEBUG 2021-08-08 16:32:10:973 grpc-nio-worker-ELG-1-3 
org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 
0xd054a904, L:/10.x.x.46:59115 - R:/10.x.x.x:11800] INBOUND PING: ack=false 
bytes=1234 
             DEBUG 2021-08-08 16:32:10:973 grpc-nio-worker-ELG-1-3 
org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 
0xd054a904, L:/10.x.x.46:59115 - R:/10.x.x.x:11800] OUTBOUND PING: ack=true 
bytes=1234 
             DEBUG 2021-08-08 16:32:10:973 grpc-nio-worker-ELG-1-3 
org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 
0xd054a904, L:/10.x.x.46:59115 - R:/10.x.x.x:11800] INBOUND HEADERS: 
streamId=14571 headers=GrpcHttp2ResponseHeaders[:status: 200, content-type: 
application/grpc, grpc-encoding: identity, grpc-accept-encoding: gzip] 
padding=0 endStream=false 
             DEBUG 2021-08-08 16:32:10:973 grpc-nio-worker-ELG-1-3 
org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 
0xd054a904, L:/10.x.x.46:59115 - R:/10.x.x.x:11800] INBOUND DATA: 
streamId=14571 padding=0 endStream=false length=5 bytes=0000000000 
             DEBUG 2021-08-08 16:32:10:973 grpc-nio-worker-ELG-1-3 
org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 
0xd054a904, L:/10.x.x.46:59115 - R:/10.x.x.x:11800] OUTBOUND PING: ack=false 
bytes=1234 
             DEBUG 2021-08-08 16:32:10:973 grpc-nio-worker-ELG-1-3 
org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 
0xd054a904, L:/10.x.x.46:59115 - R:/10.x.x.x:11800] INBOUND HEADERS: 
streamId=14571 headers=GrpcHttp2ResponseHeaders[grpc-status: 0] padding=0 
endStream=tru
   
   
   Thanks,
   Mahudees


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