Scenario
User have created a Map/Reduce Script, however, the End Date is not populating even though the script execution has already completed on the Map/Reduce Script Status
Solution
In the events that the Map/Reduce script is not showing its End Date on the Map/Reduce Script Status, this is because there is no Summarize stage on the script.
Kindly ensure that the summarize stage is included on your script in order to populate the End Date after the script has completed its execution.