Help Center/ MapReduce Service/ User Guide (Kuala Lumpur Region)/ MRS Cluster Component Operation Gudie/ Using Hive/ Authorizing Over 32 Roles in Hive
Updated on 2022-08-12 GMT+08:00
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Authorizing Over 32 Roles in Hive

Scenario

This function applies to Hive.

The number of OS user groups is limited, and the number of roles that can be created in Hive cannot exceed 32. After this function is enabled, more than 32 roles can be created in Hive.

  • After this function is enabled and the table or database is authorized, roles that have the same permission on the table or database will be combined using vertical bars (|). When the ACL permission is queried, the combined result is displayed, which is different from that before the function is enabled. This operation is irreversible. Determine whether to make adjustment based on the actual application scenario.
  • MRS 3.x and later versions support Ranger. If the current component uses Ranger for permission control, you need to configure related policies based on Ranger for permission management. For details, see Adding a Ranger Access Permission Policy for Hive.
  • After this function is enabled, a maximum of 512 roles (including owner) are supported by default. The number is controlled by the user-defined parameter hive.supports.roles.max of MetaStore. You can change the value based on the actual application scenario.

Procedure

  1. The Hive service configuration page is displayed.

    • For versions earlier than MRS 3.x, click the cluster name. On the cluster details page that is displayed, choose Components > Hive > Service Configuration, and select All from the Basic drop-down list.

      If the Components tab is unavailable, complete IAM user synchronization first. (On the Dashboard page, click Synchronize on the right side of IAM User Sync to synchronize IAM users.)

    • For MRS 3.x or later, log in to FusionInsight Manager. For details, see Accessing FusionInsight Manager (MRS 3.x or Later). And choose Cluster > Name of the desired cluster > Services > Hive > Configurations > All Configurations.

  2. Choose MetaStore(Role) > Customization, add a customized parameter to the hivemetastore-site.xml parameter file, set Name to hive.supports.over.32.roles, and set Value to true. Restart all Hive instances after the modification.
  3. Choose HiveServer(Role) > Customization, add a customized parameter to the hive-site.xml parameter file, set Name to hive.supports.over.32.roles, and set Value to true. Restart all Hive instances after the modification.
Parent topic: Using Hive