MockTracer.reset doesn't appear to work all cases

[mdedetrich]

From the PR here opentracing-contrib/scala-concurrent#7 it appears that in some cases MockTracer.reset() doesn't appear to clear all spans, quoting the PR.

Note that for some reason, one test is still failing, i.e.

• testNoActiveSpan *** FAILED ***
  {traceId:1, spanId:2, parentId:0, operationName:"one"} did not equal null (TracedExecutionContextTest.scala:75)

For some reason the testPropagation test is leaving over the span and its not getting reset by mockTracer.reset(), do you have any idea what could be going on here?

You can use mvn:test to reproduce the problem.

[yurishkuro]

Perhaps you have a race condition in your code, where some span is getting finish()-ed after reset() is called.