java.sql.SQLException: No current connection.
   at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(SQLExceptionFactory.java:0)
   at org.apache.derby.impl.jdbc.SQLExceptionFactory40.wrapArgsForTransportAcrossDRDA(SQLExceptionFactory40.java:0)
Caused: java.sql.SQLNonTransientConnectionException: No current connection.
   at org.apache.derby.impl.jdbc.SQLExceptionFactory40.getSQLException(SQLExceptionFactory40.java:0)
   at org.apache.derby.impl.jdbc.Util.newEmbedSQLException(Util.java:0)
   at org.apache.derby.impl.jdbc.Util.newEmbedSQLException(Util.java:0)
   at org.apache.derby.impl.jdbc.Util.noCurrentConnection(Util.java:0)
   at org.apache.derby.impl.jdbc.EmbedConnection.checkIfClosed(EmbedConnection.java:0)
   at org.apache.derby.impl.jdbc.EmbedConnection.getMetaData(EmbedConnection.java:0)
Caused: java.lang.RuntimeException: java.sql.SQLNonTransientConnectionException: No current connection.
   at org.netbeans.modules.db.sql.editor.completion.SQLCompletionQuery$1.run(SQLCompletionQuery.java:161)
   at org.netbeans.modules.db.sql.editor.completion.SQLCompletionQuery$1.run(SQLCompletionQuery.java:150)
   at org.netbeans.modules.db.metadata.model.JDBCConnMetadataModel.runReadAction(JDBCConnMetadataModel.java:97)
   at org.netbeans.modules.db.metadata.model.api.MetadataModel.runReadAction(MetadataModel.java:92)
   at org.netbeans.modules.db.sql.editor.completion.SQLCompletionQuery.doQuery(SQLCompletionQuery.java:150)
   at org.netbeans.modules.db.sql.editor.completion.SQLCompletionQuery.query(SQLCompletionQuery.java:128)
   at org.netbeans.spi.editor.completion.support.AsyncCompletionTask.run(AsyncCompletionTask.java:223)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1418)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1957)