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HBASE-23561 acquire lock before update regionsMap (#1263) 

Addendum: tie add and delete of regionMap and encodedRegionsMap

Signed-off-by: stack <stack@apache.org>
This commit is contained in:
Minwoo Kang 2020-03-12 08:57:21 +09:00 committed by GitHub
parent 0b18a7dc26
commit 6f1e8abc30
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1 changed files with 10 additions and 5 deletions
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11
hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/RegionStates.java
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@ -71,6 +71,8 @@ public class RegionStates {
public final static RegionStateStampComparator REGION_STATE_STAMP_COMPARATOR =
new RegionStateStampComparator();
private final Object regionsMapLock = new Object();
// TODO: Replace the ConcurrentSkipListMaps
/**
* RegionName -- i.e. RegionInfo.getRegionName() -- as bytes to {@link RegionStateNode}
@ -125,11 +127,12 @@ public class RegionStates {
// ==========================================================================
@VisibleForTesting
RegionStateNode createRegionStateNode(RegionInfo regionInfo) {
return regionsMap.computeIfAbsent(regionInfo.getRegionName(), key -> {
final RegionStateNode node = new RegionStateNode(regionInfo, regionInTransition);
synchronized (regionsMapLock) {
RegionStateNode node = regionsMap.computeIfAbsent(regionInfo.getRegionName(),
key -> new RegionStateNode(regionInfo, regionInTransition));
encodedRegionsMap.putIfAbsent(regionInfo.getEncodedName(), node);
return node;
});
}
}
public RegionStateNode getOrCreateRegionStateNode(RegionInfo regionInfo) {
@ -146,8 +149,10 @@ public class RegionStates {
}
public void deleteRegion(final RegionInfo regionInfo) {
synchronized (regionsMapLock) {
regionsMap.remove(regionInfo.getRegionName());
encodedRegionsMap.remove(regionInfo.getEncodedName());
}
// See HBASE-20860
// After master restarts, merged regions' RIT state may not be cleaned,
// making sure they are cleaned here