Firewall blocking in Spark 2.5

Hi,

With this new version of Spark I am having problens with reconnections. But searching for a way to solve the problem I saw that the machines that are free from the firewall don’‘t have any problems of reconnections. So I am searching for the new ports that are in use with Spark 2.5.0 and didn’'t exists in Spark 2.0.8.

Monitoring my firewall I could see it is dropping the ports 137 and 138 in many computers. Someone knows if this is the problem?

Everything is alright now.

The firewalll was blocking from the server.

Message was edited by: Leisses