joshelser commented on a change in pull request #1258: HBASE-23932 Minor
improvements to Region Normalizer
URL: https://github.com/apache/hbase/pull/1258#discussion_r389999814
##########
File path:
hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
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@@ -1868,52 +1889,50 @@ public RegionNormalizer getRegionNormalizer() {
* is globally disabled)
*/
public boolean normalizeRegions() throws IOException {
- if (!isInitialized()) {
- LOG.debug("Master has not been initialized, don't run region
normalizer.");
- return false;
- }
- if (this.getServerManager().isClusterShutdown()) {
- LOG.info("Cluster is shutting down, don't run region normalizer.");
+ if (regionNormalizerTracker == null ||
!regionNormalizerTracker.isNormalizerOn()) {
+ LOG.debug("Region normalization is disabled, don't run region
normalizer.");
return false;
}
- if (isInMaintenanceMode()) {
- LOG.info("Master is in maintenance mode, don't run region normalizer.");
+ if (skipRegionManagementAction("region normalizer")) {
return false;
}
- if (!this.regionNormalizerTracker.isNormalizerOn()) {
- LOG.debug("Region normalization is disabled, don't run region
normalizer.");
+ if (assignmentManager.hasRegionsInTransition()) {
return false;
}
synchronized (this.normalizer) {
// Don't run the normalizer concurrently
+
List<TableName> allEnabledTables = new ArrayList<>(
this.tableStateManager.getTablesInStates(TableState.State.ENABLED));
Collections.shuffle(allEnabledTables);
for (TableName table : allEnabledTables) {
- if (isInMaintenanceMode()) {
- LOG.debug("Master is in maintenance mode, stop running region
normalizer.");
- return false;
- }
-
TableDescriptor tblDesc = getTableDescriptors().get(table);
if (table.isSystemTable() || (tblDesc != null &&
!tblDesc.isNormalizationEnabled())) {
LOG.trace("Skipping normalization for {}, as it's either system"
+ " table or doesn't have auto normalization turned on", table);
continue;
}
- List<NormalizationPlan> plans =
this.normalizer.computePlanForTable(table);
- if (plans != null) {
- for (NormalizationPlan plan : plans) {
- plan.execute(asyncClusterConnection.toConnection().getAdmin());
- if (plan.getType() == PlanType.SPLIT) {
- splitPlanCount++;
- } else if (plan.getType() == PlanType.MERGE) {
- mergePlanCount++;
- }
+
+ // make one last check that the cluster isn't shutting down before
proceeding.
+ if (skipRegionManagementAction("region normalizer")) {
+ return false;
+ }
+
+ final List<NormalizationPlan> plans =
this.normalizer.computePlanForTable(table);
+ if (CollectionUtils.isEmpty(plans)) {
Review comment:
Nice -- wraps a null-check around `isEmpty()`. Had to look it up.
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