org.netbeans.api.db.explorer.DatabaseException: No operations allowed after connection closed.
        at org.netbeans.modules.db.explorer.infos.ProcedureListNodeInfo.initChildren(ProcedureListNodeInfo.java:83)
        at org.netbeans.modules.db.explorer.infos.DatabaseNodeInfo.getChildren(DatabaseNodeInfo.java:688)
        at org.netbeans.modules.db.explorer.nodes.DatabaseNode$DatabaseNodeChildFactory.createKeys(DatabaseNode.java:382)
        at org.openide.nodes.AsynchChildren.run(AsynchChildren.java:147)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:572)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:997)
com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: No operations allowed after connection closed.
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(NativeConstructorAccessorImpl.java:0)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
        at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
        at com.mysql.jdbc.Util.getInstance(Util.java:381)
        at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:985)
        at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:957)
        at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:927)
        at com.mysql.jdbc.ConnectionImpl.checkClosed(ConnectionImpl.java:1113)
        at com.mysql.jdbc.ConnectionImpl.versionMeetsMinimum(ConnectionImpl.java:5326)
        at com.mysql.jdbc.DatabaseMetaData.supportsStoredProcedures(DatabaseMetaData.java:7858)
        at com.mysql.jdbc.DatabaseMetaData.getProceduresAndOrFunctions(DatabaseMetaData.java:4201)
        at com.mysql.jdbc.DatabaseMetaData.getProcedures(DatabaseMetaData.java:4162)
        at org.netbeans.lib.ddl.adaptors.DefaultAdaptor.getProcedures(DefaultAdaptor.java:3203)
        at org.netbeans.lib.ddl.impl.DriverSpecification.getProcedures(DriverSpecification.java:147)
        at org.netbeans.modules.db.explorer.infos.ProcedureListNodeInfo.initChildren(ProcedureListNodeInfo.java:57)
        at org.netbeans.modules.db.explorer.infos.DatabaseNodeInfo.getChildren(DatabaseNodeInfo.java:688)
        at org.netbeans.modules.db.explorer.nodes.DatabaseNode$DatabaseNodeChildFactory.createKeys(DatabaseNode.java:382)
        at org.openide.nodes.AsynchChildren.run(AsynchChildren.java:147)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:572)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:997)