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fix NPE when applying failed shards several times

This commit is contained in:
kimchy 2010-04-18 20:36:46 +03:00
parent fcc32cbe21
commit 8ce9b3b1a0
2 changed files with 299 additions and 8 deletions
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7
modules/elasticsearch/src/main/java/org/elasticsearch/cluster/routing/strategy/DefaultShardsRoutingStrategy.java
View File

@ -333,6 +333,7 @@ public class DefaultShardsRoutingStrategy implements ShardsRoutingStrategy {
boolean inRelocation = failedShard.relocatingNodeId() != null;
if (inRelocation) {
RoutingNode routingNode = routingNodes.nodesToShards().get(failedShard.currentNodeId());
if (routingNode != null) {
Iterator<MutableShardRouting> shards = routingNode.iterator();
while (shards.hasNext()) {
MutableShardRouting shard = shards.next();
@ -344,10 +345,16 @@ public class DefaultShardsRoutingStrategy implements ShardsRoutingStrategy {
}
}
}
}
String nodeId = inRelocation ? failedShard.relocatingNodeId() : failedShard.currentNodeId();
RoutingNode currentRoutingNode = routingNodes.nodesToShards().get(nodeId);
if (currentRoutingNode == null) {
// already failed (might be called several times for the same shard)
continue;
}
Iterator<MutableShardRouting> shards = currentRoutingNode.iterator();
while (shards.hasNext()) {
MutableShardRouting shard = shards.next();

284
modules/elasticsearch/src/test/java/org/elasticsearch/cluster/routing/strategy/FailedShardsRoutingTests.java Normal file
View File

@ -0,0 +1,284 @@
/*
* Licensed to Elastic Search and Shay Banon under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Elastic Search licenses this
* file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.elasticsearch.cluster.routing.strategy;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.metadata.MetaData;
import org.elasticsearch.cluster.node.DiscoveryNode;
import org.elasticsearch.cluster.routing.MutableShardRouting;
import org.elasticsearch.cluster.routing.RoutingNodes;
import org.elasticsearch.cluster.routing.RoutingTable;
import org.elasticsearch.util.logging.Loggers;
import org.elasticsearch.util.transport.DummyTransportAddress;
import org.slf4j.Logger;
import org.testng.annotations.Test;
import java.util.List;
import static org.elasticsearch.cluster.ClusterState.*;
import static org.elasticsearch.cluster.metadata.IndexMetaData.*;
import static org.elasticsearch.cluster.metadata.MetaData.*;
import static org.elasticsearch.cluster.node.DiscoveryNodes.*;
import static org.elasticsearch.cluster.routing.RoutingBuilders.*;
import static org.elasticsearch.cluster.routing.ShardRoutingState.*;
import static org.hamcrest.MatcherAssert.*;
import static org.hamcrest.Matchers.*;
/**
* @author kimchy (shay.banon)
*/
@Test
public class FailedShardsRoutingTests {
private final Logger logger = Loggers.getLogger(FailedShardsRoutingTests.class);
@Test public void testFailures() {
DefaultShardsRoutingStrategy strategy = new DefaultShardsRoutingStrategy();
logger.info("Building initial routing table");
MetaData metaData = newMetaDataBuilder()
.put(newIndexMetaDataBuilder("test").numberOfShards(3).numberOfReplicas(1))
.build();
RoutingTable routingTable = routingTable()
.add(indexRoutingTable("test").initializeEmpty(metaData.index("test")))
.build();
ClusterState clusterState = newClusterStateBuilder().metaData(metaData).routingTable(routingTable).build();
logger.info("Adding two nodes and performing rerouting");
clusterState = newClusterStateBuilder().state(clusterState).nodes(newNodesBuilder().put(newNode("node1")).put(newNode("node2"))).build();
RoutingTable prevRoutingTable = routingTable;
routingTable = strategy.reroute(clusterState);
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
logger.info("Start the primary shard (on node1)");
RoutingNodes routingNodes = routingTable.routingNodes(clusterState.metaData());
prevRoutingTable = routingTable;
routingTable = strategy.applyStartedShards(clusterState, routingNodes.node("node1").shardsWithState(INITIALIZING));
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
logger.info("Start the backup shard (on node2)");
routingNodes = routingTable.routingNodes(clusterState.metaData());
prevRoutingTable = routingTable;
routingTable = strategy.applyStartedShards(clusterState, routingNodes.node("node2").shardsWithState(INITIALIZING));
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
assertThat(prevRoutingTable != routingTable, equalTo(true));
assertThat(routingTable.index("test").shards().size(), equalTo(3));
for (int i = 0; i < routingTable.index("test").shards().size(); i++) {
assertThat(routingTable.index("test").shard(i).size(), equalTo(2));
assertThat(routingTable.index("test").shard(i).shards().size(), equalTo(2));
assertThat(routingTable.index("test").shard(i).primaryShard().state(), equalTo(STARTED));
assertThat(routingTable.index("test").shard(i).primaryShard().currentNodeId(), equalTo("node1"));
assertThat(routingTable.index("test").shard(i).backupsShards().size(), equalTo(1));
// backup shards are initializing as well, we make sure that they recover from primary *started* shards in the IndicesClusterStateService
assertThat(routingTable.index("test").shard(i).backupsShards().get(0).state(), equalTo(STARTED));
assertThat(routingTable.index("test").shard(i).backupsShards().get(0).currentNodeId(), equalTo("node2"));
}
logger.info("Adding third node and reroute");
clusterState = newClusterStateBuilder().state(clusterState).nodes(newNodesBuilder().putAll(clusterState.nodes()).put(newNode("node3"))).build();
prevRoutingTable = routingTable;
routingTable = strategy.reroute(clusterState);
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
routingNodes = routingTable.routingNodes(metaData);
assertThat(prevRoutingTable != routingTable, equalTo(true));
assertThat(routingTable.index("test").shards().size(), equalTo(3));
assertThat(routingNodes.node("node1").numberOfShardsWithState(STARTED, RELOCATING), equalTo(3));
assertThat(routingNodes.node("node1").numberOfShardsWithState(STARTED), lessThan(3));
assertThat(routingNodes.node("node2").numberOfShardsWithState(STARTED, RELOCATING), equalTo(3));
assertThat(routingNodes.node("node2").numberOfShardsWithState(STARTED), lessThan(3));
assertThat(routingNodes.node("node3").numberOfShardsWithState(INITIALIZING), equalTo(2));
logger.info("Fail the shards on node 3");
routingNodes = routingTable.routingNodes(clusterState.metaData());
prevRoutingTable = routingTable;
routingTable = strategy.applyFailedShards(clusterState, routingNodes.node("node3").shardsWithState(INITIALIZING));
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
routingNodes = routingTable.routingNodes(metaData);
assertThat(prevRoutingTable != routingTable, equalTo(true));
assertThat(routingTable.index("test").shards().size(), equalTo(3));
assertThat(routingNodes.node("node1").numberOfShardsWithState(STARTED), equalTo(3));
assertThat(routingNodes.node("node2").numberOfShardsWithState(STARTED), equalTo(3));
assertThat(routingNodes.node("node3"), nullValue());
logger.info("Do another reroute, should try and assign again to node 3");
prevRoutingTable = routingTable;
routingTable = strategy.reroute(clusterState);
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
routingNodes = routingTable.routingNodes(metaData);
assertThat(prevRoutingTable != routingTable, equalTo(true));
assertThat(routingTable.index("test").shards().size(), equalTo(3));
assertThat(routingNodes.node("node1").numberOfShardsWithState(STARTED, RELOCATING), equalTo(3));
assertThat(routingNodes.node("node1").numberOfShardsWithState(STARTED), lessThan(3));
assertThat(routingNodes.node("node2").numberOfShardsWithState(STARTED, RELOCATING), equalTo(3));
assertThat(routingNodes.node("node2").numberOfShardsWithState(STARTED), lessThan(3));
assertThat(routingNodes.node("node3").numberOfShardsWithState(INITIALIZING), equalTo(2));
logger.info("Start the shards on node 3");
routingNodes = routingTable.routingNodes(clusterState.metaData());
prevRoutingTable = routingTable;
routingTable = strategy.applyStartedShards(clusterState, routingNodes.node("node3").shardsWithState(INITIALIZING));
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
routingNodes = routingTable.routingNodes(metaData);
assertThat(prevRoutingTable != routingTable, equalTo(true));
assertThat(routingTable.index("test").shards().size(), equalTo(3));
assertThat(routingNodes.node("node1").numberOfShardsWithState(STARTED), equalTo(2));
assertThat(routingNodes.node("node2").numberOfShardsWithState(STARTED), equalTo(2));
assertThat(routingNodes.node("node3").numberOfShardsWithState(STARTED), equalTo(2));
}
@Test public void test10ShardsWith1ReplicaFailure() {
DefaultShardsRoutingStrategy strategy = new DefaultShardsRoutingStrategy();
logger.info("Building initial routing table");
MetaData metaData = newMetaDataBuilder()
.put(newIndexMetaDataBuilder("test").numberOfShards(10).numberOfReplicas(1))
.build();
RoutingTable routingTable = routingTable()
.add(indexRoutingTable("test").initializeEmpty(metaData.index("test")))
.build();
ClusterState clusterState = newClusterStateBuilder().metaData(metaData).routingTable(routingTable).build();
assertThat(routingTable.index("test").shards().size(), equalTo(10));
for (int i = 0; i < routingTable.index("test").shards().size(); i++) {
assertThat(routingTable.index("test").shard(i).size(), equalTo(2));
assertThat(routingTable.index("test").shard(i).shards().size(), equalTo(2));
assertThat(routingTable.index("test").shard(i).shards().get(0).state(), equalTo(UNASSIGNED));
assertThat(routingTable.index("test").shard(i).shards().get(1).state(), equalTo(UNASSIGNED));
assertThat(routingTable.index("test").shard(i).shards().get(0).currentNodeId(), nullValue());
assertThat(routingTable.index("test").shard(i).shards().get(1).currentNodeId(), nullValue());
}
logger.info("Adding one node and performing rerouting");
clusterState = newClusterStateBuilder().state(clusterState).nodes(newNodesBuilder().put(newNode("node1"))).build();
RoutingTable prevRoutingTable = routingTable;
routingTable = strategy.reroute(clusterState);
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
assertThat(prevRoutingTable != routingTable, equalTo(true));
assertThat(routingTable.index("test").shards().size(), equalTo(10));
for (int i = 0; i < routingTable.index("test").shards().size(); i++) {
assertThat(routingTable.index("test").shard(i).size(), equalTo(2));
assertThat(routingTable.index("test").shard(i).shards().size(), equalTo(2));
assertThat(routingTable.index("test").shard(i).primaryShard().state(), equalTo(INITIALIZING));
assertThat(routingTable.index("test").shard(i).primaryShard().currentNodeId(), equalTo("node1"));
assertThat(routingTable.index("test").shard(i).backupsShards().size(), equalTo(1));
assertThat(routingTable.index("test").shard(i).backupsShards().get(0).state(), equalTo(UNASSIGNED));
assertThat(routingTable.index("test").shard(i).backupsShards().get(0).currentNodeId(), nullValue());
}
logger.info("Add another node and perform rerouting");
clusterState = newClusterStateBuilder().state(clusterState).nodes(newNodesBuilder().putAll(clusterState.nodes()).put(newNode("node2"))).build();
prevRoutingTable = routingTable;
routingTable = strategy.reroute(clusterState);
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
assertThat(prevRoutingTable != routingTable, equalTo(true));
assertThat(routingTable.index("test").shards().size(), equalTo(10));
for (int i = 0; i < routingTable.index("test").shards().size(); i++) {
assertThat(routingTable.index("test").shard(i).size(), equalTo(2));
assertThat(routingTable.index("test").shard(i).shards().size(), equalTo(2));
assertThat(routingTable.index("test").shard(i).primaryShard().state(), equalTo(INITIALIZING));
assertThat(routingTable.index("test").shard(i).primaryShard().currentNodeId(), equalTo("node1"));
assertThat(routingTable.index("test").shard(i).backupsShards().size(), equalTo(1));
// backup shards are initializing as well, we make sure that they recover from primary *started* shards in the IndicesClusterStateService
assertThat(routingTable.index("test").shard(i).backupsShards().get(0).state(), equalTo(INITIALIZING));
assertThat(routingTable.index("test").shard(i).backupsShards().get(0).currentNodeId(), equalTo("node2"));
}
logger.info("Start the primary shard (on node1)");
RoutingNodes routingNodes = routingTable.routingNodes(clusterState.metaData());
prevRoutingTable = routingTable;
routingTable = strategy.applyStartedShards(clusterState, routingNodes.node("node1").shardsWithState(INITIALIZING));
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
assertThat(prevRoutingTable != routingTable, equalTo(true));
assertThat(routingTable.index("test").shards().size(), equalTo(10));
for (int i = 0; i < routingTable.index("test").shards().size(); i++) {
assertThat(routingTable.index("test").shard(i).size(), equalTo(2));
assertThat(routingTable.index("test").shard(i).shards().size(), equalTo(2));
assertThat(routingTable.index("test").shard(i).primaryShard().state(), equalTo(STARTED));
assertThat(routingTable.index("test").shard(i).primaryShard().currentNodeId(), equalTo("node1"));
assertThat(routingTable.index("test").shard(i).backupsShards().size(), equalTo(1));
// backup shards are initializing as well, we make sure that they recover from primary *started* shards in the IndicesClusterStateService
assertThat(routingTable.index("test").shard(i).backupsShards().get(0).state(), equalTo(INITIALIZING));
assertThat(routingTable.index("test").shard(i).backupsShards().get(0).currentNodeId(), equalTo("node2"));
}
logger.info("Reroute, nothing should change");
prevRoutingTable = routingTable;
routingTable = strategy.reroute(clusterState);
assertThat(prevRoutingTable == routingTable, equalTo(true));
logger.info("Fail the backup shards");
routingNodes = routingTable.routingNodes(metaData);
prevRoutingTable = routingTable;
List<MutableShardRouting> failedShards = routingNodes.node("node2").shardsWithState(INITIALIZING);
routingTable = strategy.applyFailedShards(clusterState, failedShards);
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
routingNodes = routingTable.routingNodes(metaData);
assertThat(prevRoutingTable != routingTable, equalTo(true));
assertThat(routingTable.index("test").shards().size(), equalTo(10));
for (int i = 0; i < routingTable.index("test").shards().size(); i++) {
assertThat(routingTable.index("test").shard(i).size(), equalTo(2));
assertThat(routingTable.index("test").shard(i).shards().size(), equalTo(2));
assertThat(routingTable.index("test").shard(i).primaryShard().state(), equalTo(STARTED));
assertThat(routingTable.index("test").shard(i).primaryShard().currentNodeId(), equalTo("node1"));
assertThat(routingTable.index("test").shard(i).backupsShards().size(), equalTo(1));
// backup shards are initializing as well, we make sure that they recover from primary *started* shards in the IndicesClusterStateService
assertThat(routingTable.index("test").shard(i).backupsShards().get(0).state(), equalTo(UNASSIGNED));
assertThat(routingTable.index("test").shard(i).backupsShards().get(0).currentNodeId(), nullValue());
}
// fail them again...
routingTable = strategy.applyFailedShards(clusterState, failedShards);
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
routingNodes = routingTable.routingNodes(metaData);
assertThat(prevRoutingTable != routingTable, equalTo(true));
assertThat(routingTable.index("test").shards().size(), equalTo(10));
for (int i = 0; i < routingTable.index("test").shards().size(); i++) {
assertThat(routingTable.index("test").shard(i).size(), equalTo(2));
assertThat(routingTable.index("test").shard(i).shards().size(), equalTo(2));
assertThat(routingTable.index("test").shard(i).primaryShard().state(), equalTo(STARTED));
assertThat(routingTable.index("test").shard(i).primaryShard().currentNodeId(), equalTo("node1"));
assertThat(routingTable.index("test").shard(i).backupsShards().size(), equalTo(1));
// backup shards are initializing as well, we make sure that they recover from primary *started* shards in the IndicesClusterStateService
assertThat(routingTable.index("test").shard(i).backupsShards().get(0).state(), equalTo(UNASSIGNED));
assertThat(routingTable.index("test").shard(i).backupsShards().get(0).currentNodeId(), nullValue());
}
}
private DiscoveryNode newNode(String nodeId) {
return new DiscoveryNode(nodeId, DummyTransportAddress.INSTANCE);
}
}