[HBASE-15848] Fix possible null point dereference in RSGroupBasedLoadBalancer#getMisplacedRegions()

• Type: Bug
• Status: Resolved
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 2.0.0
• Fix Version/s: 2.0.0
• Component/s: regionserver
• Hadoop Flags: Reviewed
• Assignee: Stephen Yuan Jiang
• Reporter: Stephen Yuan Jiang
• Created: 17/May/16 19:42
• Updated: 06/Jul/17 01:43
• Resolved: 17/May/16 21:09

Description

Possible null pointer dereference of local variable 'info' in the function RSGroupBasedLoadBalancer#getMisplacedRegions():

      if (assignedServer != null &&
          (info == null || !info.containsServer(assignedServer.getHostPort()))) {
        LOG.debug("Found misplaced region: " + region.getRegionNameAsString() +
            " on server: " + assignedServer +
            " found in group: " +
            RSGroupInfoManager.getRSGroupOfServer(assignedServer.getHostPort()) +
            " outside of group: " + info.getName());
        misplacedRegions.add(region);
      }

Issue Links

• is related to: HBASE-15631 Backport Regionserver Groups (HBASE-6721) to branch-1