Description

I was running some code in Aggregation Framework in Atlas UI. It failed with 'invalid parameter' message. Code looked ok so I tested it in Compass and runs without issues. After a browser page refresh it works in Atlas UI too. 

Steps to Reproduce

1. I cannot reproduce it anymore. If you think it is interesting enough to follow up maybe you can find information on this in the logs? I was testing in SA-NEUR organization Emil Zegers Demo Project in FreeTier cluster with sample_airbnb.listingsAndReviews
2. Used this code:

 

$group:

{ _id: null, count: \{ $sum: 1 }

}

Expected Results

1. .

 

_id:null
count:5555

Actual Results

 

Message below stage block mentioning 'invalid parameter'

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Engineering Notes

• .

UX Notes

• .