Traces fail to send to stackdriver

[Nick Hudkins]

I recently upgraded my deployment of zipkin-gcp to 0.10.0, at which point traces were no longer making it into Stackdriver.

Upon enabling DEBUG mode on the zipkin deployment, I was able to see the failures resulting in the traces not sent to Stackdriver:

io.grpc.netty.shaded.io.netty.channel.AbstractChannel$AnnotatedSocketException: Network unreachable: cloudtrace.googleapis.com/2607:f8b0:4004:804:0:0:0:200a:443
    at sun.nio.ch.Net.connect0(Native Method) ~[?:1.8.0_191]
    at sun.nio.ch.Net.connect(Net.java:454) ~[?:1.8.0_191]
    at sun.nio.ch.Net.connect(Net.java:446) ~[?:1.8.0_191]
    at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java

I have since rolled back to 0.9.0 and all is well.

[Nick Hudkins]

Since this has nothing to do with the docker image, I have opened an issue on zipkin-gcp instead: openzipkin/zipkin-gcp#114