Error executing two jasper connectors in parallel

I have two tasks after a parallel gateway, each of the executing a Jasper connector with different jrxml files and the same database configuration. They generate the following exception (complete stack trace at the bottom):

org.bonitasoft.engine.connector.exception.SConnectorException: java.util.concurrent.ExecutionException: org.bonitasoft.engine.connector.exception.SConnectorException: org.bonitasoft.engine.connector.ConnectorException: org.postgresql.util.PSQLException: This connection has been closed.

Parallel execution

Suppose there is an organization with following structure:
* ManagerX & ManagerY report to CEO.
* EmployeeX1 & EmployeeX2 report to ManagerX.
* EmployeeY1 & EmployeeY2 report to ManagerY.

I want to implement following scenario using Bonita.

How I can do parallel pools?

Hi, I'm new using this program and after reading a lot of documentation I can not find solution to my problem: I need to insert parallel "pools" as in the image attached. Someone can tell me how?

I need do this Thanks!