[HBASE-26268] Provide coprocessor hooks for updateConfiguration and clearRegionBlockCache - ASF JIRA

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Details

Type: Bug
Status: Resolved
Priority: Major
Resolution: Fixed
Affects Version/s: None
Fix Version/s: 2.6.0, 4.0.0-alpha-1, 3.0.0-beta-2
Component/s: None
Labels:
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Release Note:

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- Added methods preUpdateMasterConfiguration and postUpdateMasterConfiguration to MasterObserver to allow coprocessors to hook into configuration reloads in HMasters. Runs when reload is triggered by RPC or by SIGHUP.
- Added methods preUpdateRegionServerConfiguration and postUpdateRegionServerConfiguration to RegionServerObserver to do the same in RegionServers.
- Added methods preClearRegionBlockCache and postClearRegionBlockCache to RegionServerObserver to allow coprocessors to hook into block cache clearing.

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- Added methods preUpdateMasterConfiguration and postUpdateMasterConfiguration to MasterObserver to allow coprocessors to hook into configuration reloads in HMasters. Runs when reload is triggered by RPC or by SIGHUP. - Added methods preUpdateRegionServerConfiguration and postUpdateRegionServerConfiguration to RegionServerObserver to do the same in RegionServers. - Added methods preClearRegionBlockCache and postClearRegionBlockCache to RegionServerObserver to allow coprocessors to hook into block cache clearing.

Description

Sorry for the vague title, not sure if it'd be better to create individual jiras. I discovered that the following two AdminService endpoints are not covered by AccessController:

updateConfiguration
clearRegionBlockCache

There may be others, I haven't done a full audit. We should add coprocessor hooks for these and wrap with AccessController, especially since they can both have an affect on the cluster.