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Update Settings: Changing the number of replicas does cause allocation / deallocation of shards, closes #1162.

This commit is contained in:
Shay Banon 2011-07-26 11:16:13 +03:00
parent 68868c4d3f
commit b70694ce63
1 changed files with 15 additions and 2 deletions
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17
modules/elasticsearch/src/main/java/org/elasticsearch/cluster/metadata/MetaDataUpdateSettingsService.java
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@ -26,6 +26,8 @@ import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.ClusterStateListener; import org.elasticsearch.cluster.ClusterStateListener;
import org.elasticsearch.cluster.ProcessedClusterStateUpdateTask; import org.elasticsearch.cluster.ProcessedClusterStateUpdateTask;
import org.elasticsearch.cluster.routing.RoutingTable; import org.elasticsearch.cluster.routing.RoutingTable;
import org.elasticsearch.cluster.routing.allocation.RoutingAllocation;
import org.elasticsearch.cluster.routing.allocation.ShardsAllocation;
import org.elasticsearch.common.Booleans; import org.elasticsearch.common.Booleans;
import org.elasticsearch.common.collect.Sets; import org.elasticsearch.common.collect.Sets;
import org.elasticsearch.common.component.AbstractComponent; import org.elasticsearch.common.component.AbstractComponent;
@ -36,6 +38,8 @@ import org.elasticsearch.common.settings.Settings;
import java.util.Map; import java.util.Map;
import java.util.Set; import java.util.Set;
import static org.elasticsearch.cluster.ClusterState.*;
/** /**
* @author kimchy (shay.banon) * @author kimchy (shay.banon)
*/ */
@ -43,10 +47,13 @@ public class MetaDataUpdateSettingsService extends AbstractComponent implements
private final ClusterService clusterService; private final ClusterService clusterService;
@Inject public MetaDataUpdateSettingsService(Settings settings, ClusterService clusterService) { private final ShardsAllocation shardsAllocation;
@Inject public MetaDataUpdateSettingsService(Settings settings, ClusterService clusterService, ShardsAllocation shardsAllocation) {
super(settings); super(settings);
this.clusterService = clusterService; this.clusterService = clusterService;
this.clusterService.add(this); this.clusterService.add(this);
this.shardsAllocation = shardsAllocation;
} }
@Override public void clusterChanged(ClusterChangedEvent event) { @Override public void clusterChanged(ClusterChangedEvent event) {
@ -175,7 +182,13 @@ public class MetaDataUpdateSettingsService extends AbstractComponent implements
} }
return ClusterState.builder().state(currentState).metaData(metaDataBuilder).routingTable(routingTableBuilder).build(); ClusterState updatedState = ClusterState.builder().state(currentState).metaData(metaDataBuilder).routingTable(routingTableBuilder).build();
// now, reroute in case things change that require it (like number of replicas)
RoutingAllocation.Result routingResult = shardsAllocation.reroute(updatedState);
updatedState = newClusterStateBuilder().state(updatedState).routingResult(routingResult).build();
return updatedState;
} catch (Exception e) { } catch (Exception e) {
listener.onFailure(e); listener.onFailure(e);
return currentState; return currentState;