java.lang.IllegalStateException: Too many org.netbeans.modules.dbschema.nodes.SchemaRootChildren$1 (3) in shared RequestProcessor; create your own
   at org.openide.util.RequestProcessor.post(RequestProcessor.java:439)
   at org.netbeans.modules.dbschema.nodes.SchemaRootChildren.getElement(SchemaRootChildren.java:165)
   at org.netbeans.modules.dbschema.nodes.SchemaRootChildren.refreshKeys(SchemaRootChildren.java:221)
   at org.netbeans.modules.dbschema.nodes.SchemaRootChildren.setElement(SchemaRootChildren.java:204)
   at org.netbeans.modules.dbschema.jdbcimpl.DBschemaDataObject.setSchema(DBschemaDataObject.java:141)
   at org.netbeans.modules.dbschema.jdbcimpl.DBschemaDataObject.getSchema(DBschemaDataObject.java:131)
   at org.netbeans.modules.dbschema.nodes.SchemaRootChildren$1.run(SchemaRootChildren.java:170)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1411)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1991)