Jiri-Kremser commented on a change in pull request #2413: [wip] Draft 2 - Wrap
runs within OpenTracing spans
URL:
https://github.com/apache/incubator-openwhisk/pull/2413#discussion_r123772388
##########
File path:
core/invoker/src/main/scala/whisk/core/container/WhiskContainer.scala
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@@ -92,17 +96,53 @@ class WhiskContainer(
}
/**
+ * Starts the tracing.
+ */
+ private def startSpan(msg: ActivationMessage): Option[Span] = {
+ val tracerOption = if (GlobalTracer.isRegistered) Option.empty else
Some(TracerResolver.resolveTracer)
+ tracerOption foreach GlobalTracer.register
Review comment:
right, I didn't realize the `TracerResolver.resolveTracer()` can return also
null and when using `Some(null)` it actually creates the `Some(null)` what I
need here is the `Option(null)` that results in `None`
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