Known issues in Impala Virtual Warehouses

This topic describes the Impala Virtual Warehouse known issues for Cloudera Data Warehouse Private Cloud.

Known issues identified in 1.5.4

DWX-18505: Resource template changes back to Reduced resources while creating a Virtual Warehouse
On the Create Virtual Warehouse modal, suppose you selected Default resources from the Resource Template drop-down menu. When you wait for a few seconds or click elsewhere on the modal, you see that the resource template changes back to Reduced resources. However, when you create the Virtual Warehouse, the Virtual Warehouse is created with the resource template you initially selected. This is a CDW UI defect you encounter on environments that are activated using the low resource mode.
DWX-18445: Virtual Warehouses get stuck in the deleting state
You may intermittently notice that a Virtual Warehouses gets stuck in the deleting state when you delete a Virtual Warehouse in CDW. This could be due to a failing diagnostic job that is in an Init:0/1 state in the namespace.
None. The diagnostic job gets cleaned up in one hour, after which the Virtual Warehouse gets deleted successfully.

Known issues identified in 1.5.1

DWX-14292: Impala executors and coordinator pods get stuck in pending state
If you have enabled low resource mode while activating an environment in CDW and also enabled the option to customize pod sizes for Impala from the Advanced Settings page, then you may notice that the executors and coordinator pods do not request the set amount of memory and CPU. This happens because the low resource mode overrides the default pod configuration.
Low resource mode and custom pod configurations for Impala cannot be used at the same time. To resolve this issue, do not select the Low resource mode option while activating an environment. Instead, create custom pod configurations with lower resources for Impala. You can continue to use lesser resources as defined in the custom pod configuration for Hive.
VIZ-2046: Trusted impersonation does not work in CDW
When you try to create a connection to the Impala Virtual Warehouse from Cloudera Data Visualization (CDV), CDV is unable to use Trusted Impersonation as a mode of authentication. Therefore, you need to enter both the username and password for authentication.