Duncan-tree-zhou commented on issue #2836: get http 500 error when sending a span without "kind" attribute to zipkin receiver URL: https://github.com/apache/skywalking/issues/2836#issuecomment-500260847 > We support, but first not production ready, we said very clearly in our document, then, we need those tags today. If you want to support this feature, I could assist you, but SkyWalking PMC are interesting in SkyWalking native agents more, and our users are too. Acutally i had tried the java auto again first. But there some problem to assist the skywalking tracing with our rpc component which is in the [supported list](https://github.com/apache/skywalking/blob/master/docs/en/setup/service-agent/java-agent/Supported-list.md) (dubbox 2.8.4). It looks like they had some custom enhancement on the rpc component. So the next step, I will try to use the java againt and find out the compatibility problem. Thanks for your advise.
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