I have 100k events collected. The events tab shows the first few. When I was quickly scrolling down with the mouse wheel, the lower half of the screen went blank (empty lines; as exepected when making space for more to come), then the exception showed and the remaining lines of the screen showed Message is harmless, as the UI continues to work, but the message is annoying com.google.gwt.core.client.JavaScriptException:(TypeError): sourceLocation is null stack: org_rhq_enterprise_gui_coregui_client_inventory_common_event_EventCompositeDatasource$5_hoverHTML__Ljava_lang_Object_2Lcom_smartgwt_client_widgets_grid_ListGridRecord_2IILjava_lang_String_2(" ",[object Object],138,3)@http://snert:7080/coregui/org.rhq.enterprise.gui.coregui.CoreGUI/CE2276AC5BAC83316A1FFD8E5A1EDAB3.cache.html:134652 ("loading"," ",138,3,[object Object])@http://snert:7080/coregui/org.rhq.enterprise.gui.coregui.CoreGUI/CE2276AC5BAC83316A1FFD8E5A1EDAB3.cache.html:23812 com_google_gwt_core_client_impl_Impl_entry0__Ljava_lang_Object_2Ljava_lang_Object_2Ljava_lang_Object_2Ljava_lang_Object_2((function (record, value, rowNum, colNum, grid) {var recordJ = com_smartgwt_client_widgets_grid_ListGridRecord_getOrCreateRef__Lcom_google_gwt_core_client_JavaScriptObject_2Lcom_smartgwt_client_widgets_grid_ListGridRecord_2(record);var valueJ = $wnd.SmartGWT.convertToJavaType(value);return hoverCustomizer.hoverHTML__Ljava_lang_Object_2Lcom_smartgwt_client_widgets_grid_ListGridRecord_2IILjava_lang_String_2(valueJ, recordJ, rowNum, colNum);}),[object Object],[object Object])@http://snert:7080/coregui/org.rhq.enterprise.gui.coregui.CoreGUI/CE2276AC5BAC83316A1FFD8E5A1EDAB3.cache.html:2474 ("loading"," ",138,3,[object Object])@http://snert:7080/coregui/org.rhq.enterprise.gui.coregui.CoreGUI/CE2276AC5BAC83316A1FFD8E5A1EDAB3.cache.html:2463 isc_ListGrid_cellHoverHTML("loading",138,3)@http://snert:7080/coregui/org.rhq.enterprise.gui.coregui.CoreGUI/sc/modules/ISC_Grids.js:1557 anonymous("loading",138,3)@http://snert:7080/coregui/org.rhq.enterprise.gui.coregui.CoreGUI/sc/modules/ISC_Grids.js:927 isc_GridRenderer__showHover("loading",138,3)@http://snert:7080/coregui/org.rhq.enterprise.gui.coregui.CoreGUI/sc/modules/ISC_Grids.js:718 isc_GridRenderer__cellHover(138,3)@http://snert:7080/coregui/org.rhq.enterprise.gui.coregui.CoreGUI/sc/modules/ISC_Grids.js:717 isc_c_Hover__doAction()@http://snert:7080/coregui/org.rhq.enterprise.gui.coregui.CoreGUI/sc/modules/ISC_Core.js:3764 isc_c_Class_fireCallback([object Object],(void 0),[object Array],[object Object],true)@http://snert:7080/coregui/org.rhq.enterprise.gui.coregui.CoreGUI/sc/modules/ISC_Core.js:296 isc_c_Timer__fireTimeout("$ir32283")@http://snert:7080/coregui/org.rhq.enterprise.gui.coregui.CoreGUI/sc/modules/ISC_Core.js:1186 @http://snert:7080/coregui/org.rhq.enterprise.gui.coregui.CoreGUI/sc/modules/ISC_Core.js:1181 fileName: http://snert:7080/coregui/org.rhq.enterprise.gui.coregui.CoreGUI/CE2276AC5BAC83316A1FFD8E5A1EDAB3.cache.html lineNumber: 134652 --- STACK TRACE FOLLOWS --- (TypeError): sourceLocation is null stack: org_rhq_enterprise_gui_coregui_client_inventory_common_event_EventCompositeDatasource$5_hoverHTML__Ljava_lang_Object_2Lcom_smartgwt_client_widgets_grid_ListGridRecord_2IILjava_lang_String_2(" ",[object Object],138,3)@http://snert:7080/coregui/org.rhq.enterprise.gui.coregui.CoreGUI/CE2276AC5BAC83316A1FFD8E5A1EDAB3.cache.html:134652 ("loading"," ",138,3,[object Object])@http://snert:7080/coregui/org.rhq.enterprise.gui.coregui.CoreGUI/CE2276AC5BAC83316A1FFD8E5A1EDAB3.cache.html:23812 com_google_gwt_core_client_impl_Impl_entry0__Ljava_lang_Object_2Ljava_lang_Object_2Ljava_lang_Object_2Ljava_lang_Object_2((function (record, value, rowNum, colNum, grid) {var recordJ = com_smartgwt_client_widgets_grid_ListGridRecord_getOrCreateRef__Lcom_google_gwt_core_client_JavaScriptObject_2Lcom_smartgwt_client_widgets_grid_ListGridRecord_2(record);var valueJ = $wnd.SmartGWT.convertToJavaType(value);return hoverCustomizer.hoverHTML__Ljava_lang_Object_2Lcom_smartgwt_client_widgets_grid_ListGridRecord_2IILjava_lang_String_2(valueJ, recordJ, rowNum, colNum);}),[object Object],[object Object])@http://snert:7080/coregui/org.rhq.enterprise.gui.coregui.CoreGUI/CE2276AC5BAC83316A1FFD8E5A1EDAB3.cache.html:2474 ("loading"," ",138,3,[object Object])@http://snert:7080/coregui/org.rhq.enterprise.gui.coregui.CoreGUI/CE2276AC5BAC83316A1FFD8E5A1EDAB3.cache.html:2463 isc_ListGrid_cellHoverHTML("loading",138,3)@http://snert:7080/coregui/org.rhq.enterprise.gui.coregui.CoreGUI/sc/modules/ISC_Grids.js:1557 anonymous("loading",138,3)@http://snert:7080/coregui/org.rhq.enterprise.gui.coregui.CoreGUI/sc/modules/ISC_Grids.js:927 isc_GridRenderer__showHover("loading",138,3)@http://snert:7080/coregui/org.rhq.enterprise.gui.coregui.CoreGUI/sc/modules/ISC_Grids.js:718 isc_GridRenderer__cellHover(138,3)@http://snert:7080/coregui/org.rhq.enterprise.gui.coregui.CoreGUI/sc/modules/ISC_Grids.js:717 isc_c_Hover__doAction()@http://snert:7080/coregui/org.rhq.enterprise.gui.coregui.CoreGUI/sc/modules/ISC_Core.js:3764 isc_c_Class_fireCallback([object Object],(void 0),[object Array],[object Object],true)@http://snert:7080/coregui/org.rhq.enterprise.gui.coregui.CoreGUI/sc/modules/ISC_Core.js:296 isc_c_Timer__fireTimeout("$ir32283")@http://snert:7080/coregui/org.rhq.enterprise.gui.coregui.CoreGUI/sc/modules/ISC_Core.js:1186 @http://snert:7080/coregui/org.rhq.enterprise.gui.coregui.CoreGUI/sc/modules/ISC_Core.js:1181 fileName: http://snert:7080/coregui/org.rhq.enterprise.gui.coregui.CoreGUI/CE2276AC5BAC83316A1FFD8E5A1EDAB3.cache.html lineNumber: 134652 at Unknown.org_rhq_enterprise_gui_coregui_client_inventory_common_event_EventCompositeDatasource$5_hoverHTML__Ljava_lang_Object_2Lcom_smartgwt_client_widgets_grid_ListGridRecord_2IILjava_lang_String_2(Unknown source:0) at Unknown.anonymous(Unknown source:0) at Unknown.com_google_gwt_core_client_impl_Impl_entry0__Ljava_lang_Object_2Ljava_lang_Object_2Ljava_lang_Object_2Ljava_lang_Object_2(Unknown source:0) at Unknown.anonymous(Unknown source:0) at Unknown.isc_ListGrid_cellHoverHTML(Unknown source:0) at Unknown.anonymous(Unknown source:0) at Unknown.isc_GridRenderer__showHover(Unknown source:0) at Unknown.isc_GridRenderer__cellHover(Unknown source:0) at Unknown.isc_c_Hover__doAction(Unknown source:0) at Unknown.isc_c_Class_fireCallback(Unknown source:0) at Unknown.isc_c_Timer__fireTimeout(Unknown source:0) at Unknown.anonymous(Unknown source:0) at Unknown.anonymous(Unknown source:0)
Fixed in master - http://git.fedorahosted.org/git/?p=rhq/rhq.git;a=commitdiff;h=4f832a4 The key to preventing such NPEs is to know that the value and/or record parameters may be null when the following method in a ListGridField HoverCustomizer is invoked while the ListGrid's data is still loading: public String hoverHTML(Object value, ListGridRecord record, int rowNum, int colNum) So always check for null before trying to access value or record. If they are null, just return null, which tells the ListGrid not to show a tooltip at all.
Bulk close of old bugs in VERIFIED state.