Cloudera Docs

Configuring Impala coordinator shutdown

To optimize resource utilization, you need to know how to configure Impala coordinators to automatically shutdown during idle periods. You need to know how to prevent unnecessary restarts. Monitoring programs that periodically connect to Impala can cause unnecessary restarts.

When you create a Virtual Warehouse, you can configure Impala coordinators to automatically shutdown during idle periods. The coordinator start up can last several minutes, so clients connected to the Virtual Warehouse can time out.
Update impyla, jdbc, impala shell clients if used to connect to Impala.
  1. Log in to the Data Warehouse service.
  2. Click under Virtual Warehouses to add a new Virtual Warehouse.
  3. Select IMPALA as the SQL engine type.
  4. Select a database catalog, or accept the default.
  5. Set User Groups that can access endpoints, keys, and Tagging for the Virtual Warehouse.
  6. Select a size for the Virtual Warehouse.
  7. Turn off Disable AutoSuspend.
    The Impala coordinator does not automatically shutdown unless the Impala executors are suspended.
  8. Turn on Allow Shutdown of Coordinator.
    After Impala executors have been suspended, the Impala coordinator waits for the time period specified by the Trigger Shutdown Delay before shutting down.

    For example, if AutoSuspend Timeout = 300 seconds and Trigger Shutdown Delay=150 seconds, after 300 seconds of inactivity Impala executors suspend, and then 150 seconds later, the Impala coordinator shuts down.