11.1p Exception in Showcase and request flood in application on ListGridField hover

[Blama]

Hi Isomorphic,

please see this showcase sample (v11.1p_2018-01-09), which causes many errors like this in the Developer Console on hover for me.

15:46:11.806:TMR9:WARN:Label:isc_Label_2:Attempt to access destroyed widget in the DOM - destroy() called at invalid time (eg: mid-draw) or invalid method called on destroy()d widget. Stack Trace:
    Canvas.getHandle() on [Label ID:isc_Label_2] @ ISC_Core.js:2701:328
    Button._getTableElement() on [Label ID:isc_Label_2] @ ISC_Foundation.js:494:83
    Button._getCellElement() on [Label ID:isc_Label_2] @ ISC_Foundation.js:494:183
    Button.setBackgroundColor(_1=>"#ffff77") on [Label ID:isc_Label_2] @ ISC_Foundation.js:507:25
    _3.updateServerContactLabel(requests=>Array[1]) on [Class RPCManager] @ [no file]:262:21
    _3.queueSent(requests=>Array[1]) on [Class RPCManager] @ [no file]:255:31
    RPCManager._sendQueue(_1=>undef, _2=>null, _3=>"https://www-demos.smartclient.com/smartc..."[113], _4=>Obj) on [Class RPCManager] @ ISC_DataBinding.js:1258:42
    [c]RPCManager.sendQueue(_1=>undef, _2=>undef, _3=>undef, _4=>undef) on [Class RPCManager] @ ISC_DataBinding.js:1229:61
    [c]RPCManager.sendRequest(_1=>Obj) on [Class RPCManager] @ ISC_DataBinding.js:1175:218
    DataSource.performSCServerOperation(_1=>Obj, _2=>Obj) on [DataSource ID:supplyItemWithOps] @ ISC_DataBinding.js:2104:75
    DataSource.sendDSRequest(_1=>Obj) on [DataSource ID:supplyItemWithOps] @ ISC_DataBinding.js:623:13
    DataSource.performDSOperation(_1=>"fetch", _2=>Obj, _3=>Obj, _4=>Obj) on [DataSource ID:supplyItemWithOps] @ ISC_DataBinding.js:596:13
    DataSource.fetchData(_1=>Obj, _2=>Obj, _3=>Obj) on [DataSource ID:supplyItemWithOps] @ ISC_DataBinding.js:546:99
    ResultSet.fetchRemoteData(_1=>Obj, _2=>undef, _3=>undef) on [ResultSet ID:isc_ResultSet_25 (dataSource: supplyItemWithOps, created by: isc_DetailViewer_0)] @ ISC_DataBinding.js:1438:88
    ResultSet._fetchAllRemoteData() on [ResultSet ID:isc_ResultSet_25 (dataSource: supplyItemWithOps, created by: isc_DetailViewer_0)] @ ISC_DataBinding.js:1433:697
    ResultSet.getRange(_1=>0, _2=>1, _3=>undef, _4=>undef) on [ResultSet ID:isc_ResultSet_25 (dataSource: supplyItemWithOps, created by: isc_DetailViewer_0)] @ ISC_DataBinding.js:1416:74
    ResultSet.get(_1=>0) on [ResultSet ID:isc_ResultSet_25 (dataSource: supplyItemWithOps, created by: isc_DetailViewer_0)] @ ISC_DataBinding.js:1414:13
    Canvas.requestVisibleRows() on [DetailViewer ID:isc_DetailViewer_0] @ ISC_Core.js:3896:353
    Canvas.filterWithCriteria(_1=>Obj, _2=>Obj{ID:supplyItemWithOps_fetch}, _3=>Obj) on [DetailViewer ID:isc_DetailViewer_0] @ ISC_Core.js:3887:201
    Canvas._filter(_1=>"fetch", _2=>Obj, _3=>null, _4=>Obj) on [DetailViewer ID:isc_DetailViewer_0] @ ISC_Core.js:3885:6
    Canvas.fetchData(_1=>Obj, _2=>null, _3=>Obj) on [DetailViewer ID:isc_DetailViewer_0] @ ISC_Core.js:3852:921
    _3.getCellHoverComponent(record=>Obj, rowNum=>7, colNum=>2) on[ListGrid ID:itemList] @ [no file]:160:32
    ListGrid._getCellHoverComponent(_1=>Obj, _2=>7, _3=>2) on[ListGrid ID:itemList] @ ISC_Grids.js:1625:407
    GridBody._getCellHoverComponent(_1=>Obj, _2=>7, _3=>2) on [GridBody ID:itemList_body] @ ISC_Grids.js:630:398
    GridRenderer._showHover(_1=>Obj, _2=>7, _3=>2, _4=>false) on [GridBody ID:itemList_body] @ ISC_Grids.js:527:126
    GridRenderer._cellHover(_1=>7, _2=>2) on [GridBody ID:itemList_body] @ ISC_Grids.js:526:162
    Hover._doAction() on [Class Hover] @ ISC_Core.js:4248:311
    [c]Class.fireCallback(_1=>Obj, _2=>null, _3=>null, _4=>null, _5=>true) on [Class Timer] @ ISC_Core.js:307:104
    Timer._fireTimeout(_1=>"$ir4485", _2=>4505, _3=>undef) on [Class Timer] @ ISC_Core.js:1760:166
    <anonymous>() @ ISC_Core.js:1757:40

15:46:12.313:TMR9:WARN:Label:isc_Label_2:Attempt to access destroyed widget in the DOM - destroy() called at invalid time (eg: mid-draw) or invalid method called on destroy()d widget. Stack Trace:
    Canvas.getHandle() on [Label ID:isc_Label_2] @ ISC_Core.js:2701:328
    Button._getTableElement() on [Label ID:isc_Label_2] @ ISC_Foundation.js:494:83
    Button._getCellElement() on [Label ID:isc_Label_2] @ ISC_Foundation.js:494:183
    Button.setBackgroundColor(_1=>undef) on [Label ID:isc_Label_2] @ ISC_Foundation.js:507:25
    eval() @ [no file]:265:25
    [c]Class.fireCallback(_1=>callback(), _2=>null, _3=>null, _4=>null, _5=>true) on [Class Timer] @ ISC_Core.js:307:104
    Timer._fireTimeout(_1=>"$ir4489", _2=>4509, _3=>undef) on [Class Timer] @ ISC_Core.js:1760:166
    <anonymous>() @ ISC_Core.js:1757:40

In my code I'm using this at field level with ListGridField.setShowHover(true) + ListGridField.setShowHoverComponents(true) and then

    @Override
    protected Canvas getCellHoverComponent(Record record, Integer rowNum, Integer colNum) {
        if ("myfield".equals(getFieldName(colNum))) { ....

For me locally, it does not result in exceptions, but in many calls to the DB in the ListGrid I'm returning from getCellHoverComponent(), basically on every mouse-move.
IMHO as long as the mouse is over the field, the hover should not be recreated and moving the mouse over the field should not change anything.

Best regards
Blama

[Isomorphic]

We did some testing and were not able to reproduce and see the reported warning messages. We need more information on how to reproduce the issue, or post a standalone test case so that we can test it.

Regards
Isomorphic Software

[Blama]

Hi Isomorphic,

using current online showcase (v11.1p_2018-01-11) I don't see the log issue either?!
Is it possible that it was fixed in the meantime or that it was caused by some intermittent issue?

I'll create a testcase for my "many calls to the DB"-issue I can see in my application soon.

Best regards
Blama

[Blama]

Hi Isomorphic,

I created the testcase I mentioned in #3 here.

Best regards
Blama