Span finishes before webclient completes

[winster]

Please take a look at https://github.com/winster/jaeger-trace-reactive

This is a spring boot application with opentracing. As per the doc, java-spring-cloud supports webflux and webclient. But the trace is finished before the reactive flow is completed when there is a webclient call.

Initial analysis shows that following method are invoked everytime webclient makes http request.

TracingExchangeFilterFunction::filter
TracingClientResponseMono::subscribe
TracingClientResponseSubscriber::onSubscribe

Also noted that SpanLogsAppender::append is called for every log with the same spanId.

It is observed that JaegerSpan::finish is called before missing logs are appended. But span is still not null.

I tried removing, @Async annotation in service method for which Jaeger shows only POST trace.

Is there a way to get the complete reactive flow in the trace?