com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: No operations allowed after connection closed.
   at sun.reflect.NativeConstructorAccessorImpl.newInstance0(NativeConstructorAccessorImpl.java:0)
   at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
   at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
   at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
   at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
   at com.mysql.jdbc.Util.getInstance(Util.java:386)
   at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1013)
   at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:987)
   at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:982)
   at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:927)
   at com.mysql.jdbc.ConnectionImpl.throwConnectionClosedException(ConnectionImpl.java:1205)
   at com.mysql.jdbc.ConnectionImpl.checkClosed(ConnectionImpl.java:1197)
   at com.mysql.jdbc.ConnectionImpl.getMetaData(ConnectionImpl.java:3061)
   at com.mysql.jdbc.ConnectionImpl.getMetaData(ConnectionImpl.java:3056)
   at org.netbeans.modules.dbschema.jdbcimpl.ConnectionProvider.<init>(ConnectionProvider.java:67)
   at org.netbeans.modules.erd.wizard.CaptureERD.createConnectionProvider(CaptureERD.java:214)
   at org.netbeans.modules.erd.wizard.CaptureERD.createSchemaFromConnectionInAWT(CaptureERD.java:87)
   at org.netbeans.modules.erd.wizard.CaptureERD.access$000(CaptureERD.java:59)
   at org.netbeans.modules.erd.wizard.CaptureERD$1.run(CaptureERD.java:77)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:241)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:721)
   at java.awt.EventQueue.access$200(EventQueue.java:103)
   at java.awt.EventQueue$3.run(EventQueue.java:682)
   at java.awt.EventQueue$3.run(EventQueue.java:680)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:691)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:158)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:244)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:163)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:147)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:139)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:97)