Duo Zhang created HBASE-25872:
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Summary: Add documentation for LoadBalancer about synchronization
Key: HBASE-25872
URL: https://issues.apache.org/jira/browse/HBASE-25872
Project: HBase
Issue Type: Sub-task
Reporter: Duo Zhang
In general, the balanceCluster call is not thread safe and we only allow one
balanceCluster call at the same time, so we need to synchronize balanceCluster,
onConfigurationChange, and setClusterMetrics(which will be called periodically,
maybe we should rename it to updateClusterMetrics).
Most setters do not need to be synchronized as they will only be called once
before initialization.
And anothe group of methods are XXXAssignment, these methods should be thread
safe and should not be synchronized to improve the assignment performance.
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