Daniel Roudnitsky created HBASE-28560: -----------------------------------------
Summary: Region quotas: Split/merge procedure rollback can lead to inaccurate account of region counts Key: HBASE-28560 URL: https://issues.apache.org/jira/browse/HBASE-28560 Project: HBase Issue Type: Bug Affects Versions: 3.0.0-beta-2 Reporter: Daniel Roudnitsky Assignee: Daniel Roudnitsky When region quotas are enabled, HMaster keeps an in memory account of region counts through NamespaceStateManager. Region counts in NamespaceStateManager are incremented/decremented at the beginning stages of split/merge procedures, in SPLIT_TABLE_REGION_PRE_OPERATION/MERGE_TABLE_REGIONS_PRE_MERGE_OPERATION before any region is offlined. If the split/merge procedure gets rolled back after the region count change in NamespaceStateManager is made, the split/merge procedure rollback does not revert the region count change in NamespaceStateManager to reflect that the expected split/merge never succeeded. This leaves NamespaceStateManager with an inaccurate account of the number of regions, believing that there are more/less regions than actually exist. -- This message was sent by Atlassian Jira (v8.20.10#820010)