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HBASE-24517 Addendum add more comments (#1882)

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Signed-off-by: Jan Hentschel <jan.hentschel@ultratendency.com>
Signed-off-by: Viraj Jasani <vjasani@apache.org>
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Duo Zhang 2020-06-15 10:43:57 +08:00 committed by GitHub
parent b83d38fb94
commit d0f190bdf0
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hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/AssignmentManager.java
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@ -228,6 +228,9 @@ public class AssignmentManager {
ZKWatcher zkw = master.getZooKeeper(); ZKWatcher zkw = master.getZooKeeper();
// it could be null in some tests // it could be null in some tests
if (zkw != null) { if (zkw != null) {
// here we are still in the early steps of active master startup. There is only one thread(us)
// can access AssignmentManager and create region node, so here we do not need to lock the
// region node.
RegionState regionState = MetaTableLocator.getMetaRegionState(zkw); RegionState regionState = MetaTableLocator.getMetaRegionState(zkw);
RegionStateNode regionNode = RegionStateNode regionNode =
regionStates.getOrCreateRegionStateNode(RegionInfoBuilder.FIRST_META_REGIONINFO); regionStates.getOrCreateRegionStateNode(RegionInfoBuilder.FIRST_META_REGIONINFO);