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HBASE-19752 RSGroupBasedLoadBalancer#getMisplacedRegions() should handle the case where rs group cannot be determined

This commit is contained in:
tedyu 2018-01-12 12:10:22 -08:00
parent a5601c8eac
commit f0ba7922f3
2 changed files with 29 additions and 5 deletions
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17
hbase-rsgroup/src/main/java/org/apache/hadoop/hbase/rsgroup/RSGroupBasedLoadBalancer.java
View File

@ -301,7 +301,8 @@ public class RSGroupBasedLoadBalancer implements RSGroupableBalancer {
return finalList;
}
private Set<RegionInfo> getMisplacedRegions(
@VisibleForTesting
public Set<RegionInfo> getMisplacedRegions(
Map<RegionInfo, ServerName> regions) throws IOException {
Set<RegionInfo> misplacedRegions = new HashSet<>();
for(Map.Entry<RegionInfo, ServerName> region : regions.entrySet()) {
@ -309,10 +310,16 @@ public class RSGroupBasedLoadBalancer implements RSGroupableBalancer {
ServerName assignedServer = region.getValue();
RSGroupInfo info = rsGroupInfoManager.getRSGroup(rsGroupInfoManager.
getRSGroupOfTable(regionInfo.getTable()));
if (assignedServer != null &&
(info == null || !info.containsServer(assignedServer.getAddress()))) {
RSGroupInfo otherInfo = null;
otherInfo = rsGroupInfoManager.getRSGroupOfServer(assignedServer.getAddress());
if (assignedServer == null) {
LOG.debug("There is no assigned server for {}", region);
continue;
}
RSGroupInfo otherInfo = rsGroupInfoManager.getRSGroupOfServer(assignedServer.getAddress());
if (info == null && otherInfo == null) {
LOG.warn("Couldn't obtain rs group information for {} on {}", region, assignedServer);
continue;
}
if ((info == null || !info.containsServer(assignedServer.getAddress()))) {
LOG.debug("Found misplaced region: " + regionInfo.getRegionNameAsString() +
" on server: " + assignedServer +
" found in group: " + otherInfo +

17
hbase-rsgroup/src/test/java/org/apache/hadoop/hbase/master/balancer/TestRSGroupBasedLoadBalancer.java
View File

@ -75,6 +75,7 @@ public class TestRSGroupBasedLoadBalancer {
private static SecureRandom rand;
static String[] groups = new String[] { RSGroupInfo.DEFAULT_GROUP, "dg2", "dg3", "dg4" };
static TableName table0 = TableName.valueOf("dt0");
static TableName[] tables =
new TableName[] { TableName.valueOf("dt1"),
TableName.valueOf("dt2"),
@ -214,6 +215,20 @@ public class TestRSGroupBasedLoadBalancer {
assertClusterAsBalanced(loadMap);
}
@Test
public void testGetMisplacedRegions() throws Exception {
// Test case where region is not considered misplaced if RSGroupInfo cannot be determined
Map<RegionInfo, ServerName> inputForTest = new HashMap<>();
RegionInfo ri = RegionInfoBuilder.newBuilder(table0)
.setStartKey(new byte[16])
.setEndKey(new byte[16])
.setSplit(false)
.setRegionId(regionId++)
.build();
inputForTest.put(ri, servers.iterator().next());
Set<RegionInfo> misplacedRegions = loadBalancer.getMisplacedRegions(inputForTest);
assertFalse(misplacedRegions.contains(ri));
}
/**
* Test the cluster startup bulk assignment which attempts to retain assignment info.
*/
@ -533,6 +548,8 @@ public class TestRSGroupBasedLoadBalancer {
tableMap.put(tables[i], groupName);
tds.add(htd);
}
tableMap.put(table0, "");
tds.add(new HTableDescriptor(table0));
return tds;
}