Help Center> MapReduce Service> Component Operation Guide (Normal)> Using Tez> Common Issues> Error Occurs When a User Switches to the Tez Web UI
Updated on 2022-12-02 GMT+08:00

Error Occurs When a User Switches to the Tez Web UI

Question

When a user logs in to Manager and switches to the Tez web UI, error 404 or 503 is displayed.

Answer

The Tez web UI depends on the TimelineServer instance of Yarn. Therefore, TimelineServer must be installed in advance and in the Good state.