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Duplicate query results and data update failures

Duplicate query results and data update failures

New Contributor
Hi,
I try to finish the "The Getting Started with Hadoop" tutorial, but I meet two questions
 
First, in exercise 1, I run the code the guide offered but my result shows multiple identical records. As the graph shows, no.1-4 are the same record.
Carloszone_0-1604720599210.png

 

 
 
Second, in exercise 2, I try to update the dataset but I don't why my new table is empty. so I cannot finish the following parts.
Carloszone_1-1604720599203.png

 

Here is the code from the guide.
 

 

20201106214039.png