Nirdosh Kumar Yadav created HBASE-30352:
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Summary: "MergeTableRegionsProcedure/SplitTableRegionProcedure:
tolerate stale recovered.edits below durable seqid
Key: HBASE-30352
URL: https://issues.apache.org/jira/browse/HBASE-30352
Project: HBase
Issue Type: Bug
Components: master
Affects Versions: 2.6.7, 2.5.16, 3.0.0
Reporter: Nirdosh Kumar Yadav
{color:#172b4d}When MergeTableRegionsProcedure fails at the
MERGE_TABLE_REGIONS_CHECK_CLOSED_REGIONS state — e.g. because
AssignmentManagerUtil.checkClosedRegion() throws "Recovered.edits are found in
Region: … abort split/merge to prevent data loss" — the procedure framework
unwinds through rollbackState(). The MERGE_TABLE_REGIONS_CHECK_CLOSED_REGIONS
case is a bare break;, so the parents that were CLOSED during the prior forward
step MERGE_TABLE_REGIONS_CLOSE_REGIONS are never re-opened. Both parent regions
remain OFFLINE and the RIT can persist indefinitely until an operator
intervenes. So we will check the max seq ID of recovered edits and compare with
max Seq ID of region and Ignore if recovered edits are stale. {color}
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