tenacity retry and an "Alert! Unexpected" exception

When collecting information from a pipeline, sometime a message is send to the strout:

Alert! Unexpected <class 'tenacity.RetryError'> exception RetryError[<Future at 0x7fae805f9050 state=finished raised ChunkedEncodingError>]

There would be a subset of jobs in the pipeline failing in something we may have to catch earlier.