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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.allocation;
import org.elasticsearch.Version;
import org.elasticsearch.cluster.ClusterName;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.EmptyClusterInfoService;
import org.elasticsearch.cluster.metadata.IndexMetaData;
import org.elasticsearch.cluster.metadata.MetaData;
import org.elasticsearch.cluster.node.DiscoveryNodes;
import org.elasticsearch.cluster.routing.RoutingTable;
import org.elasticsearch.cluster.routing.ShardRouting;
import org.elasticsearch.cluster.routing.allocation.allocator.BalancedShardsAllocator;
import org.elasticsearch.cluster.routing.allocation.command.AllocationCommands;
import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
import org.elasticsearch.cluster.routing.allocation.decider.Decision;
import org.elasticsearch.cluster.routing.allocation.decider.MaxRetryAllocationDecider;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.test.ESAllocationTestCase;
import org.elasticsearch.test.gateway.NoopGatewayAllocator;
import java.util.Collections;
import java.util.List;
import static org.elasticsearch.cluster.routing.ShardRoutingState.INITIALIZING;
import static org.elasticsearch.cluster.routing.ShardRoutingState.STARTED;
import static org.elasticsearch.cluster.routing.ShardRoutingState.UNASSIGNED;
public class MaxRetryAllocationDeciderTests extends ESAllocationTestCase {
private AllocationService strategy;
@Override
public void setUp() throws Exception {
super.setUp();
strategy = new AllocationService(Settings.builder().build(), new AllocationDeciders(Settings.EMPTY,
Collections.singleton(new MaxRetryAllocationDecider(Settings.EMPTY))),
NoopGatewayAllocator.INSTANCE, new BalancedShardsAllocator(Settings.EMPTY), EmptyClusterInfoService.INSTANCE);
}
private ClusterState createInitialClusterState() {
MetaData.Builder metaBuilder = MetaData.builder();
metaBuilder.put(IndexMetaData.builder("idx").settings(settings(Version.CURRENT)).numberOfShards(1).numberOfReplicas(0));
MetaData metaData = metaBuilder.build();
RoutingTable.Builder routingTableBuilder = RoutingTable.builder();
routingTableBuilder.addAsNew(metaData.index("idx"));
RoutingTable routingTable = routingTableBuilder.build();
ClusterState clusterState = ClusterState.builder(ClusterName.CLUSTER_NAME_SETTING.getDefault(Settings.EMPTY))
.metaData(metaData).routingTable(routingTable).build();
clusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder().add(newNode("node1")).add(newNode("node2")))
.build();
RoutingTable prevRoutingTable = routingTable;
routingTable = strategy.reroute(clusterState, "reroute", false).routingTable();
clusterState = ClusterState.builder(clusterState).routingTable(routingTable).build();
assertEquals(prevRoutingTable.index("idx").shards().size(), 1);
assertEquals(prevRoutingTable.index("idx").shard(0).shards().get(0).state(), UNASSIGNED);
assertEquals(routingTable.index("idx").shards().size(), 1);
assertEquals(routingTable.index("idx").shard(0).shards().get(0).state(), INITIALIZING);
return clusterState;
}
public void testSingleRetryOnIgnore() {
ClusterState clusterState = createInitialClusterState();
RoutingTable routingTable = clusterState.routingTable();
final int retries = MaxRetryAllocationDecider.SETTING_ALLOCATION_MAX_RETRY.get(Settings.EMPTY);
// now fail it N-1 times
for (int i = 0; i < retries-1; i++) {
List<FailedRerouteAllocation.FailedShard> failedShards = Collections.singletonList(
new FailedRerouteAllocation.FailedShard(routingTable.index("idx").shard(0).shards().get(0), "boom" + i,
new UnsupportedOperationException()));
RoutingAllocation.Result result = strategy.applyFailedShards(clusterState, failedShards);
assertTrue(result.changed());
routingTable = result.routingTable();
clusterState = ClusterState.builder(clusterState).routingTable(routingTable).build();
assertEquals(routingTable.index("idx").shards().size(), 1);
assertEquals(routingTable.index("idx").shard(0).shards().get(0).state(), INITIALIZING);
assertEquals(routingTable.index("idx").shard(0).shards().get(0).unassignedInfo().getNumFailedAllocations(), i+1);
assertEquals(routingTable.index("idx").shard(0).shards().get(0).unassignedInfo().getMessage(), "boom" + i);
}
// now we go and check that we are actually stick to unassigned on the next failure
List<FailedRerouteAllocation.FailedShard> failedShards = Collections.singletonList(
new FailedRerouteAllocation.FailedShard(routingTable.index("idx").shard(0).shards().get(0), "boom",
new UnsupportedOperationException()));
RoutingAllocation.Result result = strategy.applyFailedShards(clusterState, failedShards);
assertTrue(result.changed());
routingTable = result.routingTable();
clusterState = ClusterState.builder(clusterState).routingTable(routingTable).build();
assertEquals(routingTable.index("idx").shards().size(), 1);
assertEquals(routingTable.index("idx").shard(0).shards().get(0).unassignedInfo().getNumFailedAllocations(), retries);
assertEquals(routingTable.index("idx").shard(0).shards().get(0).state(), UNASSIGNED);
assertEquals(routingTable.index("idx").shard(0).shards().get(0).unassignedInfo().getMessage(), "boom");
result = strategy.reroute(clusterState, new AllocationCommands(), false, true); // manual reroute should retry once
assertTrue(result.changed());
routingTable = result.routingTable();
clusterState = ClusterState.builder(clusterState).routingTable(routingTable).build();
assertEquals(routingTable.index("idx").shards().size(), 1);
assertEquals(routingTable.index("idx").shard(0).shards().get(0).unassignedInfo().getNumFailedAllocations(), retries);
assertEquals(routingTable.index("idx").shard(0).shards().get(0).state(), INITIALIZING);
assertEquals(routingTable.index("idx").shard(0).shards().get(0).unassignedInfo().getMessage(), "boom");
// now we go and check that we are actually stick to unassigned on the next failure ie. no retry
failedShards = Collections.singletonList(
new FailedRerouteAllocation.FailedShard(routingTable.index("idx").shard(0).shards().get(0), "boom",
new UnsupportedOperationException()));
result = strategy.applyFailedShards(clusterState, failedShards);
assertTrue(result.changed());
routingTable = result.routingTable();
clusterState = ClusterState.builder(clusterState).routingTable(routingTable).build();
assertEquals(routingTable.index("idx").shards().size(), 1);
assertEquals(routingTable.index("idx").shard(0).shards().get(0).unassignedInfo().getNumFailedAllocations(), retries+1);
assertEquals(routingTable.index("idx").shard(0).shards().get(0).state(), UNASSIGNED);
assertEquals(routingTable.index("idx").shard(0).shards().get(0).unassignedInfo().getMessage(), "boom");
}
public void testFailedAllocation() {
ClusterState clusterState = createInitialClusterState();
RoutingTable routingTable = clusterState.routingTable();
final int retries = MaxRetryAllocationDecider.SETTING_ALLOCATION_MAX_RETRY.get(Settings.EMPTY);
// now fail it N-1 times
for (int i = 0; i < retries-1; i++) {
List<FailedRerouteAllocation.FailedShard> failedShards = Collections.singletonList(
new FailedRerouteAllocation.FailedShard(routingTable.index("idx").shard(0).shards().get(0), "boom" + i,
new UnsupportedOperationException()));
RoutingAllocation.Result result = strategy.applyFailedShards(clusterState, failedShards);
assertTrue(result.changed());
routingTable = result.routingTable();
clusterState = ClusterState.builder(clusterState).routingTable(routingTable).build();
assertEquals(routingTable.index("idx").shards().size(), 1);
ShardRouting unassignedPrimary = routingTable.index("idx").shard(0).shards().get(0);
assertEquals(unassignedPrimary.state(), INITIALIZING);
assertEquals(unassignedPrimary.unassignedInfo().getNumFailedAllocations(), i+1);
assertEquals(unassignedPrimary.unassignedInfo().getMessage(), "boom" + i);
// MaxRetryAllocationDecider#canForceAllocatePrimary should return YES decisions because canAllocate returns YES here
assertEquals(Decision.YES, new MaxRetryAllocationDecider(Settings.EMPTY).canForceAllocatePrimary(
unassignedPrimary, null, new RoutingAllocation(null, null, clusterState, null, 0, false)));
}
// now we go and check that we are actually stick to unassigned on the next failure
{
List<FailedRerouteAllocation.FailedShard> failedShards = Collections.singletonList(
new FailedRerouteAllocation.FailedShard(routingTable.index("idx").shard(0).shards().get(0), "boom",
new UnsupportedOperationException()));
RoutingAllocation.Result result = strategy.applyFailedShards(clusterState, failedShards);
assertTrue(result.changed());
routingTable = result.routingTable();
clusterState = ClusterState.builder(clusterState).routingTable(routingTable).build();
assertEquals(routingTable.index("idx").shards().size(), 1);
ShardRouting unassignedPrimary = routingTable.index("idx").shard(0).shards().get(0);
assertEquals(unassignedPrimary.unassignedInfo().getNumFailedAllocations(), retries);
assertEquals(unassignedPrimary.state(), UNASSIGNED);
assertEquals(unassignedPrimary.unassignedInfo().getMessage(), "boom");
// MaxRetryAllocationDecider#canForceAllocatePrimary should return a NO decision because canAllocate returns NO here
assertEquals(Decision.NO, new MaxRetryAllocationDecider(Settings.EMPTY).canForceAllocatePrimary(
unassignedPrimary, null, new RoutingAllocation(null, null, clusterState, null, 0, false)));
}
// change the settings and ensure we can do another round of allocation for that index.
clusterState = ClusterState.builder(clusterState).routingTable(routingTable)
.metaData(MetaData.builder(clusterState.metaData())
.put(IndexMetaData.builder(clusterState.metaData().index("idx")).settings(
Settings.builder().put(clusterState.metaData().index("idx").getSettings()).put("index.allocation.max_retries",
retries+1).build()
).build(), true).build()).build();
RoutingAllocation.Result result = strategy.reroute(clusterState, "settings changed", false);
assertTrue(result.changed());
routingTable = result.routingTable();
clusterState = ClusterState.builder(clusterState).routingTable(routingTable).build();
// good we are initializing and we are maintaining failure information
assertEquals(routingTable.index("idx").shards().size(), 1);
ShardRouting unassignedPrimary = routingTable.index("idx").shard(0).shards().get(0);
assertEquals(unassignedPrimary.unassignedInfo().getNumFailedAllocations(), retries);
assertEquals(unassignedPrimary.state(), INITIALIZING);
assertEquals(unassignedPrimary.unassignedInfo().getMessage(), "boom");
// bumped up the max retry count, so canForceAllocatePrimary should return a YES decision
assertEquals(Decision.YES, new MaxRetryAllocationDecider(Settings.EMPTY).canForceAllocatePrimary(
routingTable.index("idx").shard(0).shards().get(0), null, new RoutingAllocation(null, null, clusterState, null, 0, false)));
// now we start the shard
routingTable = strategy.applyStartedShards(clusterState, Collections.singletonList(
routingTable.index("idx").shard(0).shards().get(0))).routingTable();
clusterState = ClusterState.builder(clusterState).routingTable(routingTable).build();
// all counters have been reset to 0 ie. no unassigned info
assertEquals(routingTable.index("idx").shards().size(), 1);
assertNull(routingTable.index("idx").shard(0).shards().get(0).unassignedInfo());
assertEquals(routingTable.index("idx").shard(0).shards().get(0).state(), STARTED);
// now fail again and see if it has a new counter
List<FailedRerouteAllocation.FailedShard> failedShards = Collections.singletonList(
new FailedRerouteAllocation.FailedShard(routingTable.index("idx").shard(0).shards().get(0), "ZOOOMG",
new UnsupportedOperationException()));
result = strategy.applyFailedShards(clusterState, failedShards);
assertTrue(result.changed());
routingTable = result.routingTable();
clusterState = ClusterState.builder(clusterState).routingTable(routingTable).build();
assertEquals(routingTable.index("idx").shards().size(), 1);
unassignedPrimary = routingTable.index("idx").shard(0).shards().get(0);
assertEquals(unassignedPrimary.unassignedInfo().getNumFailedAllocations(), 1);
assertEquals(unassignedPrimary.state(), INITIALIZING);
assertEquals(unassignedPrimary.unassignedInfo().getMessage(), "ZOOOMG");
// Counter reset, so MaxRetryAllocationDecider#canForceAllocatePrimary should return a YES decision
assertEquals(Decision.YES, new MaxRetryAllocationDecider(Settings.EMPTY).canForceAllocatePrimary(
unassignedPrimary, null, new RoutingAllocation(null, null, clusterState, null, 0, false)));
}
}
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