thangTang commented on a change in pull request #1071: HBASE-23693 Split
failure may cause region hole and data loss when use zk assign
URL: https://github.com/apache/hbase/pull/1071#discussion_r368803882
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File path:
hbase-server/src/main/java/org/apache/hadoop/hbase/master/RegionStates.java
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@@ -758,8 +764,20 @@ public void regionOffline(
// Delete the ZNode if exists
ZKAssign.deleteNodeFailSilent(watcher, region);
regionsToOffline.add(region);
+ PairOfSameType<HRegionInfo> daughterRegions =
+
MetaTableAccessor.getDaughterRegionsFromParent(this.server.getConnection(),
region);
+ if (daughterRegions != null) {
+ if (daughterRegions.getFirst() != null) {
+
daughter2Parent.put(daughterRegions.getFirst().getEncodedName(), region);
+ }
+ if (daughterRegions.getSecond() != null) {
+
daughter2Parent.put(daughterRegions.getSecond().getEncodedName(), region);
+ }
+ }
} catch (KeeperException ke) {
server.abort("Unexpected ZK exception deleting node " + region,
ke);
+ } catch (IOException e) {
+ LOG.warn("get daughter from meta exception " + region, e);
Review comment:
If we update the meta information later, we can only put it after the
completion of execute `openDaughters`. It is not very clear to me what impact
this might have now. I may need more detailed and comprehensive thinking. My
idea is to merge this patch first, at least it can solve most of the problems.
Do you think it is okay? @wchevreuil
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