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Tez will propagate most of the exceptions to client side. So please first check the client side log to look for any useful information about the errors.n If the client side log still does not convey much information, you can check for the yarn application logs. 

Users can invoke command "yarn logs -applicationId {your_app_id}" to fetch the yarn app log to your local directory. This command is only available when the yarn log aggregation is enabled, for . For how to enable the yarn app log aggregation, you can refer refer to http://hortonworks.com/blog/simplifying-user-logs-management-and-access-in-yarn/ . If the log aggregation is not enabled, you may have to find the logs on each node manager machines. 

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