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Jasper report is getting executed for hours and not generating the output.
Please find the below image.
Note :
Successful preview in Jasper Studio
No errors in MS logs
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I would have the DBA monitor for long running queries. Perhaps the report is doing a massive cross-product or is inefficient. If nothing is going on with the database, its possible that the browser/webserver timed out. In that case, it will never return and nothing is running on the back end.