Expose counts for dropped attributes/events/links in ReadableSpan

[aabmass]

Regarding span limits, the spec says here:

Counts for attributes, events and links dropped due to collection limits MUST be available for exporters to report as described in the exporters specification.

However these counts are not exposed to exporters anywhere in ReadableSpan and should be made available

opentelemetry-js/packages/opentelemetry-tracing/src/export/ReadableSpan.ts

Line 29 in 81c4bce

export interface ReadableSpan {

[github-actions]

This issue is stale because it has been open 60 days with no activity. Remove stale label or comment or this will be closed in 14 days.

[github-actions]

This issue was closed because it has been stale for 14 days with no activity.

[aabmass]

@dyladan should this issue stay open? Looks like a missing MUST requirement

[mohitk05]

Hello @aabmass @dyladan, is this still an open issue? I see that the ReadableSpan tagged in the description points to the deprecated tracing package. Though the new ReadableSpan interface in the sdk-trace-base package does not have the dropped count properties as well. If this still needs a contribution, I can pick it!

[dyladan]

yes it still needs a contribution. thanks for volunteering!

[mohitk05]

Okay, sure! Will start on this one.

[mohitk05]

Hey @dyladan, have added a solution for this in #3576, let me know how it looks!