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HBASE-26117 RIT counts should be configured when cluster is balancing #3524

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HBASE-26117 RIT counts should be configured when cluster is balancing #3524

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3 changes: 3 additions & 0 deletions hbase-common/src/main/java/org/apache/hadoop/hbase/HConstants.java
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Original file line number Diff line number Diff line change
Expand Up @@ -133,6 +133,9 @@ public enum OperationStatusCode {
/** Cluster is in distributed mode or not */
public static final String CLUSTER_DISTRIBUTED = "hbase.cluster.distributed";

/** Config for balancing the cluster parallel*/
public static final String BALANCE_PARALLEL_REGIONS = "hbase.master.balance.parallel.regions";

/** Config for pluggable load balancers */
public static final String HBASE_MASTER_LOADBALANCER_CLASS = "hbase.master.loadbalancer.class";

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7 changes: 4 additions & 3 deletions hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
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Expand Up @@ -409,6 +409,7 @@ public class HMaster extends HRegionServer implements MasterServices {

// Cached clusterId on stand by masters to serve clusterID requests from clients.
private final CachedClusterId cachedClusterId;
private int balanceParallelRegions;

/**
* Initializes the HMaster. The steps are as follows:
Expand Down Expand Up @@ -484,6 +485,7 @@ public HMaster(final Configuration conf) throws IOException {
this.activeMasterManager = createActiveMasterManager(zooKeeper, serverName, this);

cachedClusterId = new CachedClusterId(this, conf);
this.balanceParallelRegions = conf.getInt(HConstants.BALANCE_PARALLEL_REGIONS, 5);
} catch (Throwable t) {
// Make sure we log the exception. HMaster is often started via reflection and the
// cause of failed startup is lost.
Expand Down Expand Up @@ -1763,10 +1765,9 @@ public boolean balance(boolean force) throws IOException {
// ignore the force flag in that case
boolean metaInTransition = assignmentManager.isMetaRegionInTransition();
List<RegionStateNode> toPrint = regionsInTransition;
int max = 5;
boolean truncated = false;
if (regionsInTransition.size() > max) {
toPrint = regionsInTransition.subList(0, max);
if (regionsInTransition.size() > this.balanceParallelRegions) {
toPrint = regionsInTransition.subList(0, this.balanceParallelRegions);
truncated = true;
}
if (!force || metaInTransition) {
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