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Database names are not validated when entering a name either through the rename function or through the property editor. Steps to Reproduce ------------------ 1. Open the Services tab and expand Databases. 2. Right click the default jdbc:derby sample database and invoke "Rename..." 3. Rename to a single space and click "Ok" 4. Create new Java DB database (right click Java DB > Create Database...) 5. Rename new database to a single space and click "Ok". Expected Result --------------- Rename dialog should error on either of the following or the Ok button should be disabled with a warning as to why. - Invalid name - Name already exists Actual Result ------------- Database name is accepted as a single space at #3, if one renames again to a nothing the connection disappears altogether.