Hi @pavan venkata​ 

Yes, as the document says 0 means no timeout. It means that the notebook will take it's sweet time to complete execution without throwing an error due to a time limit. Be it if the notebook takes 1 min or 1 hour or 1 day or more. However, there is a limit of 30 days for job runs. you can find that in the same documentation place.

That 10 minutes you are seeing is for the databricks downtime. It has nothing to do with your code because obviously you can't do anything when databricks service itself is not working.

Cheers..