java.lang.NullPointerException
        at org.netbeans.modules.db.explorer.node.ProcedureParamNodeProvider$1.run(ProcedureParamNodeProvider.java:118)
        at org.netbeans.modules.db.explorer.node.ProcedureParamNodeProvider$1.run(ProcedureParamNodeProvider.java:98)
        at org.netbeans.modules.db.metadata.model.JDBCConnMetadataModel.runReadAction(JDBCConnMetadataModel.java:94)
        at org.netbeans.modules.db.metadata.model.api.MetadataModel.runReadAction(MetadataModel.java:89)
        at org.netbeans.modules.db.explorer.node.ProcedureParamNodeProvider.initialize(ProcedureParamNodeProvider.java:97)
        at org.netbeans.api.db.explorer.node.NodeProvider.getNodes(NodeProvider.java:103)
        at org.netbeans.modules.db.explorer.node.NodeRegistry.getNodes(NodeRegistry.java:149)
        at org.netbeans.api.db.explorer.node.ChildNodeFactory.createKeys(ChildNodeFactory.java:104)
        at org.openide.nodes.AsynchChildren.run(AsynchChildren.java:158)
Caused: org.openide.util.RequestProcessor$Item: task failed: java.lang.NullPointerException
        at org.openide.util.RequestProcessor$Item.fillInStackTrace(RequestProcessor.java:853)
        at java.lang.Throwable.<init>(Throwable.java:181)
        at java.lang.Exception.<init>(Exception.java:29)
        at org.openide.util.RequestProcessor$Item.<init>(RequestProcessor.java:819)
        at org.openide.util.RequestProcessor$Task.schedule(RequestProcessor.java:629)
        at org.openide.nodes.AsynchChildren.refresh(AsynchChildren.java:119)
        at org.openide.nodes.ChildFactory.refresh(ChildFactory.java:159)
        at org.netbeans.api.db.explorer.node.ChildNodeFactory.refresh(ChildNodeFactory.java:74)
        at org.netbeans.api.db.explorer.node.BaseNode.update(BaseNode.java:249)
        at org.netbeans.api.db.explorer.node.BaseNode.refresh(BaseNode.java:176)
        at org.netbeans.api.db.explorer.node.NodeProvider.refresh(NodeProvider.java:133)
        at org.netbeans.modules.db.explorer.node.NodeRegistry.refresh(NodeRegistry.java:136)
        at org.netbeans.api.db.explorer.node.BaseNode.refresh(BaseNode.java:175)
        at org.netbeans.modules.db.explorer.action.RefreshAction$1.run(RefreshAction.java:100)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:576)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1013)