I've just tried with SDDM v 220.127.116.113 and Oracle XE 11gR2 on Win7. It is working as expected.
What is your environment? Seems that problem might be there.
'Connection is closed' indicates that connection was established at beginning, but no longer open at some point.
Do you have firewall, terminating connections after some idle time?
Thanks for your reply.
The issue occurs when I am working in the office. When I was working from home I was able to import the data dictionary, so it must be a network issue.
I can connect to the database with SQL developer over port 1521, and I am using the same connection settings in SDDM. Do you have any ideas?
Well, it is network issue for sure, but it's hard to say what exactly.
Just a few thoughts.
Check yours and Oracle firewalls. Maybe SQLDveleoper 'is allowed' to use the DB, but DM is not. Talk to DBA.
Try to import objects from DM within SQLDeveloper and see if the connection closed again.
Where did you saw 'Connection is Closed'? Is it error message box? Check the log file for exceptions (stacktrace) if any. Maybe stacktrace will be more explanatory.
Or maybe some of the other guys have more experience and will participate ...
I've just found some old thread - Importing a Database
Thanks for your thoughts.
I am getting an Error alert box with the Closed connection message. In the datamodeler log file I see
2014-02-07 14:11:23,649 [AWT-EventQueue-0] ERROR AbstractDBMExtractionWizardImpl - java.sql.SQLRecoverableException: Closed Connection
I checked my Windows firewall and saw my SQL Developer 3.2.2 in their with permissions to communicate through the firewall (for all network types). My SQL Developer 4.0 is not in the list, but is still able to connect to the remote database.
I have added SDDM 4.0 to the allowed applications for all network types, but I still get the error message. SDDM is allowed to use the database, since it works from home.
I still have to look into the firewall settings of my company.
Thanks so far, Wouter