SYMPTOM:
Administrators may observe in Job Monitor in Developer two or three jobs for one document run by a single user; this happens when a RS document contains an iFrame embedding another RS document. This behaviour was tested with Windows authentication.
STEPS TO REPRODUCE:
1. Make sure that Windows authentication is used and caching is disabled for this project. Alternatively, you may disable caching on the document level.
2. Create two RS Documents, Document 'A' and Document 'B', based on a simple warehouse data report (not on report cache or a cube).
3. Add an iFrame to Document 'A' referencing Document 'B', e.g. using the following syntax (ensure that the document ID of the Document 'B' is updated correctly):
./Main.aspx?Server={&SERVERNAME}&Project={&PROJECT}&Port=34952&evt=2048001&src=Main.aspx.2048001&visMode=0¤tViewMedia=1&documentID=1E96FFAD4765B51C502702BDDB44E1D6
4. Run Document 'A' and observe that initially two jobs are created (for Document
'A' and the underlying dataset but after a moment, the two or three jobs for Documet 'B' are created.
CAUSE
There are two identified causes of this behaviour.
1) 'Fit to page' is enabled: when the document is rendered and with 'fit to the browser size; feature enabled, it is re-rendered to fit the size.
As a workaround, try to set a fixed zoom (for example 150%) while editing the document and save it. It will remove the 'fit to page' feature; please note that it will affect how the document displays in different browsers.
2) The 'preview image' is enabled'; when this feature is enabled, the thumbnail preview image of reports and documents in the "Recents" menu is displayed. This has been identified confirmed to cause the duplication of jobs.
As a workaround, disable the preview by changing the below value to 0 in sys_definitions.xml file
(The sys_definitions.xml file is located under [WEB DEPLOYMENT FOLDER]/WEB-INF/xml):
<pr des="Show Previews" n="showPreviews" v="0" dt="boolean" />KB439330
