oracle.jbo.JboException: JBO-29000: Unexpected exception caught: java.sql.SQLDataException, msg=ORA-01882: timezone region not found

This JDeveloper error comes in Linux.
to remove this error.

first set DB Time
then, 

 set time zone in project properties.

A. In the Project properties of go by double clicking on them.

B.Go to Run/Debug/Profile on the Left Pane.
C.If you are using Project Settings Click on Edit by selecting your Profile most of the cases it is Default. 

D.Select Launch Settings on the left pane and in Java option enter this value Note: you can change according to your Timezone. 

Duser.timezone=Asia/Kolkata  or
Duser.timezone=+5.30 

 like I did it for Indian Time Zone.

E.Click OK and OK again Save your project exit JDeveloper and open again. 

F. Run your application again