OJDBC Error getting response; null

Hello everyone,

I'm having a small issue. 

I have an oracle db that I connecting to using a ojdbc8 connector. 

The problem is I am writing a query which should return a row with around 100 columns.

If I get all the columns' values I get an error getting response; null.

So I started decreasing the number of columns till I reached 85 where it worked and I got a response of (3658 bytes) 

What could be the problem ? I tried several  solutions here and on stackoverflow but didn't fix my problem.

Thank you