wallezhang commented on issue #6730:
URL: https://github.com/apache/skywalking/issues/6730#issuecomment-818381991
> @wallezhang Seems the problem is related to passing the span across
threads. Have you tried to get the `ContextCarrier` from the properties of the
message?
>
> ```
> ContextCarrier carrier = new ContextCarrier();
> CarrierItem next = carrier.items();
> while (next.hasNext()) {
> next = next.next();
> next.setHeadValue(msg.getProperty(next.getHeadKey()));
> }
> ```
>
> Then you can use the carrier to create a span or other operations
>
> ```
> ContextManager.createEntrySpan(<operationName>, carrier);
> ```
Why not pass the span in the message across the thread?
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