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https://issues.apache.org/jira/browse/HBASE-18602?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wang, Xinglong updated HBASE-18602:
-----------------------------------
Attachment: HBASE-18602-master-v3.patch
resubmit patch to trigger jenkins
> rsgroup cleanup unassign code
> -----------------------------
>
> Key: HBASE-18602
> URL: https://issues.apache.org/jira/browse/HBASE-18602
> Project: HBase
> Issue Type: Improvement
> Components: rsgroup
> Reporter: Wang, Xinglong
> Assignee: Wang, Xinglong
> Priority: Minor
> Attachments: HBASE-18602-master-v1.patch,
> HBASE-18602-master-v2.patch, HBASE-18602-master-v3.patch
>
>
> While walking through rsgroup code, I found that variable misplacedRegions
> has never been added any element into. This makes the unassign region code is
> not functional. And according to my test, it is actually unnecessary to do
> that.
> RSGroupBasedLoadBalancer.java
> {code:java}
> private Map<ServerName, List<HRegionInfo>> correctAssignments(
> Map<ServerName, List<HRegionInfo>> existingAssignments)
> throws HBaseIOException{
> Map<ServerName, List<HRegionInfo>> correctAssignments = new TreeMap<>();
> List<HRegionInfo> misplacedRegions = new LinkedList<>();
> correctAssignments.put(LoadBalancer.BOGUS_SERVER_NAME, new
> LinkedList<>());
> for (Map.Entry<ServerName, List<HRegionInfo>> assignments :
> existingAssignments.entrySet()){
> ServerName sName = assignments.getKey();
> correctAssignments.put(sName, new LinkedList<>());
> List<HRegionInfo> regions = assignments.getValue();
> for (HRegionInfo region : regions) {
> RSGroupInfo info = null;
> try {
> info = rsGroupInfoManager.getRSGroup(
> rsGroupInfoManager.getRSGroupOfTable(region.getTable()));
> } catch (IOException exp) {
> LOG.debug("RSGroup information null for region of table " +
> region.getTable(),
> exp);
> }
> if ((info == null) || (!info.containsServer(sName.getAddress()))) {
> correctAssignments.get(LoadBalancer.BOGUS_SERVER_NAME).add(region);
> } else {
> correctAssignments.get(sName).add(region);
> }
> }
> }
> //TODO bulk unassign?
> //unassign misplaced regions, so that they are assigned to correct groups.
> for(HRegionInfo info: misplacedRegions) {
> try {
> this.masterServices.getAssignmentManager().unassign(info);
> } catch (IOException e) {
> throw new HBaseIOException(e);
> }
> }
> return correctAssignments;
> }
> {code}
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