Jdbc JDBCOutputFormat and JDBCLookupFunction PreparedStatement loss connection, if long time not records to write.

In my thought, jdbc connector is the one of most frequently used connector in flink . But maybe there is a problem for jdbc connector. For example, if there are no records to write or join with dim table for a long time , the exception will throw like this :

java.sql.SQLException: No operations allowed after statement closed

Because there are long time no records to write , the PreparedStatement loss the connection.
If there is no other jira to solve this problem , can you assign this jira to me , I will try my best to solve it , thank you .