I suggest you to check the following:
1. if your DB has a query limit time, check the backgrounder logs and query limit time.
increase the time at DB side and tableau server side bu working with your db and tableau server administrator.
2. check the reasons for failure and try to fix it
Hi kumar bharat, thanks for the response.
I am having this failure because of huge data that takes much time, as when i tried extracting it with reduced number of records from my data, it was working fine.
Another thing is i am using tableau online. I know how to alter query limit time for server, but can't able to find solution for tableau online.
If it is online (off premise) or offline(on premise),there will be a tableau server and an administrator.
contact tab administrator.
*** suggest you to optimize extracts first