Working with other zipkin instrumentations?

[wuyangjack]

This works well by itself. Thanks!

However, it doesn't seem to work perfect when I tried to call the backend from the frontend in the Node.js example (https://github.com/openzipkin/zipkin-js-example). When I inspected the trace tree, the Node.js spans are correct, while the backend span is missing all annotations from finagle.

Is this normal? Any suggestions on making them interoperate?

p.s., I didn't change any code in these examples.