opentelemetry连接被拒绝:localhost/0:0:0:0:0:1:4317

Question

我使用opentelemtry进行跟踪以下是命令，但出现错误有人能指出我在这里做错了什么吗：

java -Dotel.traces.exporter=jaeger  -Dotel.exporter.jaeger.endpoint=host:14250 -Dotel.resource.attributes=service.name=app-name 
-javaagent:./opentelemetry-javaagent-all.jar -jar app-1.0.0.jar

[opentelemetry.auto.trace 2021-03-17 12:41:19:593 +0530] [IntervalMetricReader-1] WARN io.opentelemetry.exporter.otlp.metrics.OtlpGrpcMetricExporter - Failed to export metrics
io.grpc.StatusRuntimeException: UNAVAILABLE: io exception
at io.grpc.Status.asRuntimeException(Status.java:534)
at io.grpc.stub.ClientCalls$UnaryStreamToFuture.onClose(ClientCalls.java:533)
at io.grpc.internal.ClientCallImpl.closeObserver(ClientCallImpl.java:617)
at io.grpc.internal.ClientCallImpl.access$300(ClientCallImpl.java:70)
at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInternal(ClientCallImpl.java:803)
at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInContext(ClientCallImpl.java:782)
at io.grpc.internal.ContextRunnable.run(ContextRunnable.java:37)
at io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:123)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: io.netty.channel.AbstractChannel$AnnotatedConnectException: Connection refused: localhost/0:0:0:0:0:0:0:1:4317
Caused by: java.net.ConnectException: Connection refused
at java.base/sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
at java.base/sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:779)
at io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:330)
at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:334)
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:702)
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:650)
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:576)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493)
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.base/java.lang.Thread.run(Thread.java:834)

Answer 1

据我所知，OTel有两个模块-跟踪和度量。这个错误似乎是在抱怨"；度量"；，而你的痕迹可能真的很好。它尝试使用默认度量导出器(non-jaeger(，该导出器将度量写入本地Otel收集器https://github.com/open-telemetry/opentelemetry-collector(localhost/0:0:0:0:0:1:4317(

在撰写本文时，度量仍标记为Alpha，如https://github.com/open-telemetry/opentelemetry-java/blob/v1.0.1/QUICKSTART.mds

我没有使用jaeger，也许他们也支持度量标准。试试-Dotel.metrics.exporter=jaeger，看看它是否有效。

如果您只想删除该警告，您可以考虑添加标志-Dotel.metrics.exporter=none，该标志应禁用指标的导出，而跟踪仍应起作用。