Rarely, the "found" key is missing from the multi-get response

We are using Elasticsearch 6.8. Our logs show that very very rarely, we get a responses from multi-get where the "found" field is missing, but the expected documents are otherwise intact.

Is this ever expected to happen? Has anyone else experienced this?

Thanks in advance if you have any insights.

Welcome to our community! :smiley:

Can you show us some examples of these responses?

Unfortunately we don't log the responses at this stage. We'll add in logging and I will update this thread if/when this crops up again.

For now, all I can add is that the request looked like this:

/_mget?_source_includes=sources.id%2Centity_id%2Cnum_contributions%2Csources.name

and the response was 200.