[Bug] skywalking java agent(injected in a scala project) can't send trace segment to oap server

[gaoyanyu]

Search before asking

• I had searched in the issues and found no similar issues.

Apache SkyWalking Component

Java Agent (apache/skywalking-java)

What happened

When I inject skywalking java agent in a scala project，I found no trace segment send to skywalking oap server. And skywalking UI has nothing except service and instance info.
skywalking-agent/logs/skywalking-api.log content is:
DEBUG 2025-04-25 07:51:27.696 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] INBOUND HEADERS: streamId=4817 headers=GrpcHttp2ResponseHeaders[:status: 200, content-type: application/grpc, grpc-encoding: identity, grpc-accept-encoding: gzip, x-envoy-upstream-service-time: 0, date: Fri, 25 Apr 2025 07:51:27 GMT, server: envoy] padding=0 endStream=false DEBUG 2025-04-25 07:51:27.696 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] INBOUND DATA: streamId=4817 padding=0 endStream=false length=5 bytes=0000000000 DEBUG 2025-04-25 07:51:27.696 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] INBOUND HEADERS: streamId=4817 headers=GrpcHttp2ResponseHeaders[grpc-status: 0] padding=0 endStream=true DEBUG 2025-04-25 07:51:28.032 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] OUTBOUND HEADERS: streamId=4819 headers=GrpcHttp2OutboundHeaders[:authority: skywalking.observability.svc:11800, :path: /skywalking.v3.ProfileTask/getProfileTaskCommands, :method: POST, :scheme: http, content-type: application/grpc, te: trailers, user-agent: grpc-java-netty/1.68.1, agent-version: 9.4.0, grpc-accept-encoding: gzip, grpc-timeout: 59999871u] streamDependency=0 weight=16 exclusive=false padding=0 endStream=false DEBUG 2025-04-25 07:51:28.032 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] OUTBOUND HEADERS: streamId=4821 headers=GrpcHttp2OutboundHeaders[:authority: skywalking.observability.svc:11800, :path: /skywalking.v10.AsyncProfilerTask/getAsyncProfilerTaskCommands, :method: POST, :scheme: http, content-type: application/grpc, te: trailers, user-agent: grpc-java-netty/1.68.1, agent-version: 9.4.0, grpc-accept-encoding: gzip, grpc-timeout: 59999843u] streamDependency=0 weight=16 exclusive=false padding=0 endStream=false DEBUG 2025-04-25 07:51:28.032 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] OUTBOUND DATA: streamId=4819 padding=0 endStream=true length=95 bytes=000000005a0a1d646f63756d656e742d61692d696e746567726174696f6e2d70722d3135122e646f63756d656e742d61692d696e746567726174696f6e2d7072... DEBUG 2025-04-25 07:51:28.032 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] OUTBOUND DATA: streamId=4821 padding=0 endStream=true length=95 bytes=000000005a0a1d646f63756d656e742d61692d696e746567726174696f6e2d70722d3135122e646f63756d656e742d61692d696e746567726174696f6e2d7072... DEBUG 2025-04-25 07:51:28.034 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] INBOUND HEADERS: streamId=4819 headers=GrpcHttp2ResponseHeaders[:status: 200, content-type: application/grpc, grpc-encoding: identity, grpc-accept-encoding: gzip, x-envoy-upstream-service-time: 0, date: Fri, 25 Apr 2025 07:51:27 GMT, server: envoy] padding=0 endStream=false DEBUG 2025-04-25 07:51:28.034 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] INBOUND DATA: streamId=4819 padding=0 endStream=false length=5 bytes=0000000000 DEBUG 2025-04-25 07:51:28.034 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] INBOUND HEADERS: streamId=4819 headers=GrpcHttp2ResponseHeaders[grpc-status: 0] padding=0 endStream=true DEBUG 2025-04-25 07:51:28.034 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] INBOUND HEADERS: streamId=4821 headers=GrpcHttp2ResponseHeaders[:status: 200, content-type: application/grpc, grpc-encoding: identity, grpc-accept-encoding: gzip, x-envoy-upstream-service-time: 0, date: Fri, 25 Apr 2025 07:51:27 GMT, server: envoy] padding=0 endStream=false DEBUG 2025-04-25 07:51:28.034 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] INBOUND DATA: streamId=4821 padding=0 endStream=false length=5 bytes=0000000000 DEBUG 2025-04-25 07:51:28.034 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] INBOUND HEADERS: streamId=4821 headers=GrpcHttp2ResponseHeaders[grpc-status: 0] padding=0 endStream=true DEBUG 2025-04-25 07:51:28.304 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] OUTBOUND HEADERS: streamId=4823 headers=GrpcHttp2OutboundHeaders[:authority: skywalking.observability.svc:11800, :path: /skywalking.v3.MeterReportService/collect, :method: POST, :scheme: http, content-type: application/grpc, te: trailers, user-agent: grpc-java-netty/1.68.1, agent-version: 9.4.0, grpc-accept-encoding: gzip, grpc-timeout: 59999893u] streamDependency=0 weight=16 exclusive=false padding=0 endStream=false DEBUG 2025-04-25 07:51:28.305 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] OUTBOUND DATA: streamId=4823 padding=0 endStream=true length=270 bytes=000000010912b0010a1b74726163696e675f636f6e746578745f706572666f726d616e63651a03108d081a0b090000000000408f4010571a0b09000000000088... DEBUG 2025-04-25 07:51:28.306 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] INBOUND HEADERS: streamId=4823 headers=GrpcHttp2ResponseHeaders[:status: 200, content-type: application/grpc, grpc-encoding: identity, grpc-accept-encoding: gzip, x-envoy-upstream-service-time: 0, date: Fri, 25 Apr 2025 07:51:28 GMT, server: envoy] padding=0 endStream=false DEBUG 2025-04-25 07:51:28.306 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] INBOUND DATA: streamId=4823 padding=0 endStream=false length=5 bytes=0000000000 DEBUG 2025-04-25 07:51:28.306 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] INBOUND HEADERS: streamId=4823 headers=GrpcHttp2ResponseHeaders[grpc-status: 0] padding=0 endStream=true DEBUG 2025-04-25 07:51:28.690 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] OUTBOUND HEADERS: streamId=4825 headers=GrpcHttp2OutboundHeaders[:authority: skywalking.observability.svc:11800, :path: /skywalking.v3.JVMMetricReportService/collect, :method: POST, :scheme: http, content-type: application/grpc, te: trailers, user-agent: grpc-java-netty/1.68.1, agent-version: 9.4.0, grpc-accept-encoding: gzip, grpc-timeout: 59999899u] streamDependency=0 weight=16 exclusive=false padding=0 endStream=false DEBUG 2025-04-25 07:51:28.690 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] OUTBOUND DATA: streamId=4825 padding=0 endStream=true length=323 bytes=000000013e0aec0108afb5b8dfe632120911becf22b0c142863f1a1a080110808080800118808080801020e8aa9ead0228808080d6021a1a108080d40318ffff... DEBUG 2025-04-25 07:51:28.691 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] INBOUND HEADERS: streamId=4825 headers=GrpcHttp2ResponseHeaders[:status: 200, content-type: application/grpc, grpc-encoding: identity, grpc-accept-encoding: gzip, x-envoy-upstream-service-time: 0, date: Fri, 25 Apr 2025 07:51:28 GMT, server: envoy] padding=0 endStream=false DEBUG 2025-04-25 07:51:28.691 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] INBOUND DATA: streamId=4825 padding=0 endStream=false length=5 bytes=0000000000 DEBUG 2025-04-25 07:51:28.691 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] INBOUND HEADERS: streamId=4825 headers=GrpcHttp2ResponseHeaders[grpc-status: 0] padding=0 endStream=true DEBUG 2025-04-25 07:51:29.690 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] OUTBOUND HEADERS: streamId=4827 headers=GrpcHttp2OutboundHeaders[:authority: skywalking.observability.svc:11800, :path: /skywalking.v3.JVMMetricReportService/collect, :method: POST, :scheme: http, content-type: application/grpc, te: trailers, user-agent: grpc-java-netty/1.68.1, agent-version: 9.4.0, grpc-accept-encoding: gzip, grpc-timeout: 59999917u] streamDependency=0 weight=16 exclusive=false padding=0 endStream=false DEBUG 2025-04-25 07:51:29.690 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] OUTBOUND DATA: streamId=4827 padding=0 endStream=true length=314 bytes=00000001350ae3010897bdb8dfe63212001a1a080110808080800118808080801020e8aa9ead0228808080d6021a1a108080d40318ffffffffffffffffff0120... DEBUG 2025-04-25 07:51:29.691 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] INBOUND HEADERS: streamId=4827 headers=GrpcHttp2ResponseHeaders[:status: 200, content-type: application/grpc, grpc-encoding: identity, grpc-accept-encoding: gzip, x-envoy-upstream-service-time: 0, date: Fri, 25 Apr 2025 07:51:29 GMT, server: envoy] padding=0 endStream=false DEBUG 2025-04-25 07:51:29.691 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] INBOUND DATA: streamId=4827 padding=0 endStream=false length=5 bytes=0000000000 DEBUG 2025-04-25 07:51:29.691 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] INBOUND HEADERS: streamId=4827 headers=GrpcHttp2ResponseHeaders[grpc-status: 0] padding=0 endStream=true DEBUG 2025-04-25 07:51:30.690 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] OUTBOUND HEADERS: streamId=4829 headers=GrpcHttp2OutboundHeaders[:authority: skywalking.observability.svc:11800, :path: /skywalking.v3.JVMMetricReportService/collect, :method: POST, :scheme: http, content-type: application/grpc, te: trailers, user-agent: grpc-java-netty/1.68.1, agent-version: 9.4.0, grpc-accept-encoding: gzip, grpc-timeout: 59999917u] streamDependency=0 weight=16 exclusive=false padding=0 endStream=false DEBUG 2025-04-25 07:51:30.690 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] OUTBOUND DATA: streamId=4829 padding=0 endStream=true length=323 bytes=000000013e0aec0108ffc4b8dfe632120911eabfb024c442863f1a1a080110808080800118808080801020e8aa9ead0228808080d6021a1a108080d40318ffff... DEBUG 2025-04-25 07:51:30.691 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] INBOUND HEADERS: streamId=4829 headers=GrpcHttp2ResponseHeaders[:status: 200, content-type: application/grpc, grpc-encoding: identity, grpc-accept-encoding: gzip, x-envoy-upstream-service-time: 0, date: Fri, 25 Apr 2025 07:51:30 GMT, server: envoy] padding=0 endStream=false DEBUG 2025-04-25 07:51:30.691 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] INBOUND DATA: streamId=4829 padding=0 endStream=false length=5 bytes=0000000000 DEBUG 2025-04-25 07:51:30.691 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] INBOUND HEADERS: streamId=4829 headers=GrpcHttp2ResponseHeaders[grpc-status: 0] padding=0 endStream=true DEBUG 2025-04-25 07:51:31.690 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] OUTBOUND HEADERS: streamId=4831 headers=GrpcHttp2OutboundHeaders[:authority: skywalking.observability.svc:11800, :path: /skywalking.v3.JVMMetricReportService/collect, :method: POST, :scheme: http, content-type: application/grpc, te: trailers, user-agent: grpc-java-netty/1.68.1, agent-version: 9.4.0, grpc-accept-encoding: gzip, grpc-timeout: 59999891u] streamDependency=0 weight=16 exclusive=false padding=0 endStream=false DEBUG 2025-04-25 07:51:31.690 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] OUTBOUND DATA: streamId=4831 padding=0 endStream=true length=314 bytes=00000001350ae30108e7ccb8dfe63212001a1a080110808080800118808080801020e8aa9ead0228808080d6021a1a108080d40318ffffffffffffffffff0120... DEBUG 2025-04-25 07:51:31.691 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] INBOUND HEADERS: streamId=4831 headers=GrpcHttp2ResponseHeaders[:status: 200, content-type: application/grpc, grpc-encoding: identity, grpc-accept-encoding: gzip, x-envoy-upstream-service-time: 0, date: Fri, 25 Apr 2025 07:51:31 GMT, server: envoy] padding=0 endStream=false DEBUG 2025-04-25 07:51:31.691 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] INBOUND DATA: streamId=4831 padding=0 endStream=false length=5 bytes=0000000000 DEBUG 2025-04-25 07:51:31.691 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] INBOUND HEADERS: streamId=4831 headers=GrpcHttp2ResponseHeaders[grpc-status: 0] padding=0 endStream=true DEBUG 2025-04-25 07:51:32.690 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] OUTBOUND HEADERS: streamId=4833 headers=GrpcHttp2OutboundHeaders[:authority: skywalking.observability.svc:11800, :path: /skywalking.v3.JVMMetricReportService/collect, :method: POST, :scheme: http, content-type: application/grpc, te: trailers, user-agent: grpc-java-netty/1.68.1, agent-version: 9.4.0, grpc-accept-encoding: gzip, grpc-timeout: 59999902u] streamDependency=0 weight=16 exclusive=false padding=0 endStream=false DEBUG 2025-04-25 07:51:32.690 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] OUTBOUND DATA: streamId=4833 padding=0 endStream=true length=314 bytes=00000001350ae30108cfd4b8dfe63212001a1a080110808080800118808080801020e8aa9ead0228808080d6021a1a108080d40318ffffffffffffffffff0120... DEBUG 2025-04-25 07:51:32.691 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] INBOUND HEADERS: streamId=4833 headers=GrpcHttp2ResponseHeaders[:status: 200, content-type: application/grpc, grpc-encoding: identity, grpc-accept-encoding: gzip, x-envoy-upstream-service-time: 0, date: Fri, 25 Apr 2025 07:51:32 GMT, server: envoy] padding=0 endStream=false DEBUG 2025-04-25 07:51:32.691 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] INBOUND DATA: streamId=4833 padding=0 endStream=false length=5 bytes=0000000000 DEBUG 2025-04-25 07:51:32.691 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] INBOUND HEADERS: streamId=4833 headers=GrpcHttp2ResponseHeaders[grpc-status: 0] padding=0 endStream=true DEBUG 2025-04-25 07:51:33.690 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] OUTBOUND HEADERS: streamId=4835 headers=GrpcHttp2OutboundHeaders[:authority: skywalking.observability.svc:11800, :path: /skywalking.v3.JVMMetricReportService/collect, :method: POST, :scheme: http, content-type: application/grpc, te: trailers, user-agent: grpc-java-netty/1.68.1, agent-version: 9.4.0, grpc-accept-encoding: gzip, grpc-timeout: 59999897u] streamDependency=0 weight=16 exclusive=false padding=0 endStream=false DEBUG 2025-04-25 07:51:33.690 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] OUTBOUND DATA: streamId=4835 padding=0 endStream=true length=314 bytes=00000001350ae30108b7dcb8dfe63212001a1a080110808080800118808080801020e8aa9ead0228808080d6021a1a108080d40318ffffffffffffffffff0120... DEBUG 2025-04-25 07:51:33.691 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] INBOUND HEADERS: streamId=4835 headers=GrpcHttp2ResponseHeaders[:status: 200, content-type: application/grpc, grpc-encoding: identity, grpc-accept-encoding: gzip, x-envoy-upstream-service-time: 0, date: Fri, 25 Apr 2025 07:51:33 GMT, server: envoy] padding=0 endStream=false DEBUG 2025-04-25 07:51:33.691 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] INBOUND DATA: streamId=4835 padding=0 endStream=false length=5 bytes=0000000000 DEBUG 2025-04-25 07:51:33.691 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] INBOUND HEADERS: streamId=4835 headers=GrpcHttp2ResponseHeaders[grpc-status: 0] padding=0 endStream=true DEBUG 2025-04-25 07:51:34.690 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] OUTBOUND HEADERS: streamId=4837 headers=GrpcHttp2OutboundHeaders[:authority: skywalking.observability.svc:11800, :path: /skywalking.v3.JVMMetricReportService/collect, :method: POST, :scheme: http, content-type: application/grpc, te: trailers, user-agent: grpc-java-netty/1.68.1, agent-version: 9.4.0, grpc-accept-encoding: gzip, grpc-timeout: 59999878u] streamDependency=0 weight=16 exclusive=false padding=0 endStream=false DEBUG 2025-04-25 07:51:34.690 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] OUTBOUND DATA: streamId=4837 padding=0 endStream=true length=323 bytes=000000013e0aec01089fe4b8dfe632120911be3ffec3c542863f1a1a080110808080800118808080801020e8aa9ead0228808080d6021a1a108080d40318ffff... DEBUG 2025-04-25 07:51:34.691 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] INBOUND HEADERS: streamId=4837 headers=GrpcHttp2ResponseHeaders[:status: 200, content-type: application/grpc, grpc-encoding: identity, grpc-accept-encoding: gzip, x-envoy-upstream-service-time: 0, date: Fri, 25 Apr 2025 07:51:34 GMT, server: envoy] padding=0 endStream=false DEBUG 2025-04-25 07:51:34.691 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] INBOUND DATA: streamId=4837 padding=0 endStream=false length=5 bytes=0000000000 DEBUG 2025-04-25 07:51:34.691 grpc-nio-worker-ELG-1-4 org.apache.skywalking.apm.dependencies.io.grpc.netty.NettyClientHandler : [id: 0xe53eb218, L:/172.19.208.30:43384 - R:skywalking.observability.svc/10.2.70.166:11800] INBOUND HEADERS: streamId=4837 headers=GrpcHttp2ResponseHeaders[grpc-status: 0] padding=0 endStream=true

What you expected to happen

skywalking java agent can send trace segment info to oap server.

How to reproduce

The startup script of my scala project is :
/usr/lib/jvm/default-jvm/bin/java -javaagent:/opt/docker/bin/../skywalking-agent/skywalking-agent.jar -Dskywalking.agent.service_name=document-ai-integration-pr-15 -Dskywalking.agent.instance_name=document-ai-integration-pr-15-5cb8456b55-8dcvn -Dskywalking.collector.backend_service=skywalking.observability.svc:11800 -Dskywalking_config=/opt/docker/bin/../skywalking-agent/config/agent.config -Dskywalking.agent.classloader_mode=CONTEXT_CLASSLOADER -Dskywalking.logging.level=DEBUG -Dconfig.file=/conf/application.conf -classpath /opt/docker/lib/document-ai-BUILD-0.1.0-6c68403.jar:/opt/docker/lib/documentai-application-BUILD-0.1.0-6c68403.jar:/opt/docker/lib/documentai-shared-BUILD-0.1.0-6c68403.jar:/opt/docker/lib/documentai-processor-BUILD-0.1.0-6c68403.jar:/opt/docker/lib/org.scala-lang.scala3-library_3-3.3.5.jar:/opt/docker/lib/com.thesamet.scalapb.scalapb-runtime_3-0.11.17.jar:/opt/docker/lib/com.thesamet.scalapb.zio-grpc.zio-grpc-core_3-0.6.0.jar:/opt/docker/lib/com.google.protobuf.protobuf-java-3.25.1.jar:/opt/docker/lib/dev.zio.zio-interop-reactivestreams_3-2.0.2.jar:/opt/docker/lib/dev.zio.zio-logging-slf4j_3-2.5.0.jar:/opt/docker/lib/dev.zio.zio-interop-cats_3-23.1.0.3.jar:/opt/docker/lib/io.circe.circe-config_3-0.10.1.jar:/opt/docker/lib/ch.qos.logback.logback-classic-1.5.16.jar:/opt/docker/lib/io.scalaland.chimney_3-1.6.0.jar:/opt/docker/lib/org.rogach.scallop_3-5.2.0.jar:/opt/docker/lib/com.typesafe.scala-logging.scala-logging_3-3.9.5.jar:/opt/docker/lib/dev.optics.monocle-core_3-3.3.0.jar:/opt/docker/lib/dev.optics.monocle-macro_3-3.3.0.jar:/opt/docker/lib/org.apache.logging.log4j.log4j-api-2.24.3.jar:/opt/docker/lib/org.apache.logging.log4j.log4j-to-slf4j-2.24.3.jar:/opt/docker/lib/io.circe.circe-core_3-0.14.10.jar:/opt/docker/lib/io.circe.circe-generic_3-0.14.10.jar:/opt/docker/lib/io.circe.circe-parser_3-0.14.10.jar:/opt/docker/lib/io.circe.circe-yaml_3-1.15.0.jar:/opt/docker/lib/com.lihaoyi.fastparse_3-3.1.1.jar:/opt/docker/lib/org.

Anything else

No response

Are you willing to submit a pull request to fix on your own?

• Yes I am willing to submit a pull request on my own!

Code of Conduct

• I agree to follow this project's Code of Conduct

[gaoyanyu]

skywalking version info:
skywalking oap & ui version: 10.2.0
skywalking java agent version: 9.4.0

[gaoyanyu]

I don't find "2 trace segments have been sent to collector. " log in skywalking-api.log，which shoud has Normally.
This picture contains skywalking api log which produced from another java web project, just for test.

[wu-sheng]

As you don't show any error logs, so, most likely, nothing wrong happens. You may use some RPC library we don't support.

[gaoyanyu]

so, which libraries are supported, where can I find them?

[wu-sheng]

I don't know. You should compare what you are using with our supported list.