DataSource fetch method called twice

[jmke9998]

Upgrade SmartGWT from 1.3 to 2.5
GWt 2.0.4, GWT-SL0.1.5

PagedDataSource extends GwtDataSource extends DataSource

@Override
protected void executeFetch(final String requestId, final DSRequest request, final DSResponse response) {
	int pageNumber = 0;
	if (pagingCanvas != null)
		pageNumber = pagingCanvas.getCurrentPage();
	
        String sortBy = request.getAttribute("sortBy");

        if (!isSortByMatches(sortBy, lastSortBy)) {
	     pageNumber = 1;
	}
	lastSortBy = sortBy;
				
	executePagedFetch(createSearchVo(sortBy, pageNumber), requestId, request, response);
}

ContentProviderDataSource extends PagedDataSource

@Override
public void executePagedFetch(SearchVo searchVo,  final String requestId, final DSRequest request, final DSResponse response) {		
	AsyncCallback<PagingVO<ContentVO>> callBack = new AsyncCallback<PagingVO<ContentVO>>() {

		@Override
		public void onFailure(Throwable exception) {
			myApp.closeWaitDialog();
			setPagedFetchFailed(requestId, request, response, exception);
			MyGwtExceptionHandler.alertException(this.getClass(), exception);
		}

		@Override
		public void onSuccess(PagingVO<ContentVO> result) {
			myApp.closeWaitDialog();
			setPagedFetchResults(requestId, request, response, result);
		}
	};
	myApp.openWaitDialog();
}

By put the break point, I found the onSuccess method was called multiple times. After first 5 rows were shown, the ContentGrid is refreshed itself and the second set of same data attached to the ContentGrid.

I use the contentGrid.invalidateCache() before the call reaches the method executeFetch from the PagedDataSource. The invalidateCache() only reaches once.

Please help.
Thanks a lot.
James.

[Ozi]

I'm not sure if this is the cause, but try to set for your listgrid:

tableGrid.setDataFetchMode(FetchMode.BASIC);

I've had similar problem with multiple fetch requests after upgrade to smartGWT2.5. It seems, there is set FetchMode.PAGED as the default value...