I think I might be misunderstanding what is occurring. Are you attempting to extract the data from Tableau Server or from Tableau Desktop. The screen shot seems to be an error that is occuring on Tableau Server not on Tabeau Desktop.
Is this a published data source that you are attempting to extract?
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Hello Patrick Byrne,
Yes, the screenshot is from tableau server.
But, on desktop as well, it took around 290 minutes to process(Without published data source) and around 15 minutes(with published data source) for tableau to crash.
By, the way, I tested the scenario on published data source as well as directly connecting to my database(Exasol), but no luck so far.
As far as Tableau support is concerned, I raised query and they told us that this might be a network connectivity issue, but when you connect directly to your database, then it can not be a connectivity issue.