This topic describes how to access the web UIs of Impala components. You can view the details of an Impala component, such as the status, metadata, and SQL execution results, on the web UI of the Impala component.
Access the web UIs of Impala components
You can access the web UIs of Impala components by using an SSH tunnel or in the E-MapReduce (EMR) console. For more information, see Create an SSH tunnel to access web UIs of open source components and Access the web UIs of open source components.
To use Knox to access the web UIs of the Impala components, you must assign a public IP address to the master node of your cluster. You can use Knox to access only the web UIs of the Catalogd and Statestored components of Impala.
Web UI ports of Impala components
Component name | Node with the component deployed | Web port |
Statestored | master-1-1 | 25010 |
Catalogd | master-1-1 | 25020 |
Impalad | Core and task node groups | 25000 |
Examples
View the details of a query on the web UI of the Impalad component
For example, after you execute an SQL statement on the core-1-2 node, you can view the execution plan and profile information of the SQL statement on the web UI of the Impalad component.
Enter http://core-1-2:25000 in the address bar of a browser and press Enter. The web UI of the Impalad component that is deployed on the core-1-2 node appears.
On the Completed Queries tab, find the desired query and click Details in the Details column.
View the details of the query on the tabs based on your business requirements.
View the metrics of the Catalogd component on the web UI of the Catalogd component
On the Access Links and Ports tab of the desired cluster in the EMR console, click the link in the Native UI Address column of IMPALA CATALOGD UI. The web UI of the Catalogd component appears.
Click /metrics. The Metrics page appears.
On the Metrics page, view the metrics of the Catalogd component based on your business requirements.
