If there is a problem with the extraction, an extra comma is printed in the extracted json file

[surajreddy]

Problem:

If an export is incomplete because of a problem, the last JSON object has an extra column at the end:

  },

]

This is causing issues with the conversion step as this file cannot be read.

[surajreddy]

I looked through the code, and this shouldn't happen. The , is only printed if we can successfully print an object after it.