[HBASE-24250] CatalogJanitor resubmits GCMultipleMergedRegionsProcedure for the same region

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.2.4
• Fix Version/s: 3.0.0-alpha-1, 2.3.0
• Component/s: master

Environment

hdfs 3.1.3 with erasure coding

hbase 2.2.4

• Assignee: Yulin Niu Assign to me
• Reporter: Andrey Elenskiy
• Created: 24/Apr/20 04:40
• Updated: 08/May/20 02:08
• Resolved: 07/May/20 21:18

Description

If a lot of regions were merged (due to change of region sizes, for example), there can be a long backlog of procedures to clean up the merged regions. If going through this backlog is slower than the CatalogJanitor's scan interval, it will end resubmitting GCMultipleMergedRegionsProcedure for the same regions over and over again.

Issue Links

• is a parent of: HBASE-24328 skip duplicate GCMultipleMergedRegionsProcedure while previous finished
• is blocked by: HBASE-24323 Avoid two parallel running of GCMulitpleMergedRegionsProcedure over the same region.
• is related to: HBASE-24255 GCRegionProcedure doesn't assign region from RegionServer leading to orphans
• is related to: HBASE-24256 When fixOverlap hits the max region limit, it is possible to include the same region in multiple merge request