Row is not a valid JSON Object - JSONException: Expected a ',' or '}'

Hi ,

the error seems to indicate that the JSON data set you are trying to read might be not be formatted correctly for Athena.

Athena expect the file to be in the format:

{ "id" : 50, "name":"John" }
{ "id" : 51, "name":"Jane" }
{ "id" : 53, "name":"Jill" }

the format below will not work:

{
  "id" : 50,
  "name":"John"
},
{
  "id" : 51,
  "name":"Jane"
}
{
  "id" : 53,
  "name":"Jill"
}

for more information please look this knowledge base article.

hope this helps