Is the BatchSpanProcessor safe to use? Do I need to manually flush it at end of invocation?

[Wade-Roberts]

Pretty much the question in the title. I was trying to go through the docs, and I wasn't seeing anything specifically about this. From what I can tell using the auto instrumentation just uses the batch span processor. And I didn't see anything specifically about needing to flush before the lambda indication ends.

Is it safe to say that if I use the collector layer that's provided that all of this will be taken care of and I won't have to worry about spans getting dropped?

[tylerbenson]

You should look into the decouple processor. That is added automatically and works along with the batch processor to flush at more appropriate times.

[Wade-Roberts]

@tylerbenson I assume you are talking about the lambda collector binary?

https://github.com/open-telemetry/opentelemetry-lambda/releases/tag/layer-collector%2F0.21.0

[tylerbenson]

oh, right. sorry I got confused. yes, you'd want to flush after every invocation before return. I think the lambda instrumentation in each language does that. This hands off to the collector which has the decouple processor which is lambda lifecycle aware.