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HBASE-22739 ArrayIndexOutOfBoundsException when balance (#729) 

Signed-off-by: stack <stack@apache.org>
This commit is contained in:
binlijin 2019-10-31 04:28:01 +08:00 committed by Michael Stack
parent 54425bf87b
commit e808ea1d04
2 changed files with 12 additions and 2 deletions
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5
hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.java
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@ -142,6 +142,7 @@ public abstract class BaseLoadBalancer implements LoadBalancer {
int[] serverIndexToRackIndex; //serverIndex -> rack index
int[][] regionsPerServer; //serverIndex -> region list
int[] serverIndexToRegionsOffset; //serverIndex -> offset of region list
int[][] regionsPerHost; //hostIndex -> list of regions
int[][] regionsPerRack; //rackIndex -> region list
int[][] primariesOfRegionsPerServer; //serverIndex -> sorted list of regions by primary region index
@ -276,6 +277,7 @@ public abstract class BaseLoadBalancer implements LoadBalancer {
serverIndexToHostIndex = new int[numServers];
serverIndexToRackIndex = new int[numServers];
regionsPerServer = new int[numServers][];
serverIndexToRegionsOffset = new int[numServers];
regionsPerHost = new int[numHosts][];
regionsPerRack = new int[numRacks][];
primariesOfRegionsPerServer = new int[numServers][];
@ -321,7 +323,7 @@ public abstract class BaseLoadBalancer implements LoadBalancer {
for (Entry<ServerName, List<RegionInfo>> entry : clusterState.entrySet()) {
int serverIndex = serversToIndex.get(entry.getKey().getHostAndPort());
regionPerServerIndex = 0;
regionPerServerIndex = serverIndexToRegionsOffset[serverIndex];
int hostIndex = hostsToIndex.get(entry.getKey().getHostname());
serverIndexToHostIndex[serverIndex] = hostIndex;
@ -334,6 +336,7 @@ public abstract class BaseLoadBalancer implements LoadBalancer {
regionsPerServer[serverIndex][regionPerServerIndex++] = regionIndex;
regionIndex++;
}
serverIndexToRegionsOffset[serverIndex] = regionPerServerIndex;
}
for (RegionInfo region : unassignedRegions) {

9
hbase-server/src/test/java/org/apache/hadoop/hbase/master/balancer/TestBaseLoadBalancer.java
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@ -473,7 +473,7 @@ public class TestBaseLoadBalancer extends BalancerTestBase {
// sharing same host and port
List<ServerName> servers = getListOfServerNames(randomServers(10, 10));
List<RegionInfo> regions = randomRegions(101);
Map<ServerName, List<RegionInfo>> clusterState = new HashMap<>();
Map<ServerName, List<RegionInfo>> clusterState = new TreeMap<>();
assignRegions(regions, servers, clusterState);
@ -491,6 +491,13 @@ public class TestBaseLoadBalancer extends BalancerTestBase {
BaseLoadBalancer.Cluster cluster = new Cluster(clusterState, null, null, null);
assertEquals(101 + 9, cluster.numRegions);
assertEquals(10, cluster.numServers); // only 10 servers because they share the same host + port
// test move
ServerName sn = oldServers.get(0);
int r0 = ArrayUtils.indexOf(cluster.regions, clusterState.get(sn).get(0));
int f0 = cluster.serversToIndex.get(sn.getHostAndPort());
int t0 = cluster.serversToIndex.get(servers.get(1).getHostAndPort());
cluster.doAction(new MoveRegionAction(r0, f0, t0));
}
private void assignRegions(List<RegionInfo> regions, List<ServerName> servers,