kafka: Fix checker worst-realtime-lag default value #580
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worst-realtime-lag used to give 0 as default but it's used as a map with :time and :lag keys. This change gives a default with both keys mapping to 0
Fixing that uncovers another problem in
condense-error
, sometimes the error values are not collections, eg with the provided test the error is{:empty-transaction-graph true}
, andcount
can't be called on that.See jepsen-io/maelstrom#79 for more information.