Examples with AllocateEmptyPrimaryAllocationCommand org.elasticsearch.cluster.routing.allocation.command.AllocateEmptyPrimaryAllocationCommand used on opensource projects

Example 6 with AllocateEmptyPrimaryAllocationCommand

use of org.elasticsearch.cluster.routing.allocation.command.AllocateEmptyPrimaryAllocationCommand in project crate by crate.

the class AllocationCommandsTests method testConflictingCommandsInSingleRequest.

@Test
public void testConflictingCommandsInSingleRequest() {
    AllocationService allocation = createAllocationService(Settings.builder().put(EnableAllocationDecider.CLUSTER_ROUTING_ALLOCATION_ENABLE_SETTING.getKey(), "none").put(EnableAllocationDecider.CLUSTER_ROUTING_REBALANCE_ENABLE_SETTING.getKey(), "none").build());
    final String index1 = "test1";
    final String index2 = "test2";
    final String index3 = "test3";
    logger.info("--> building initial routing table");
    Metadata metadata = Metadata.builder().put(IndexMetadata.builder(index1).settings(Settings.builder().put(IndexMetadata.SETTING_VERSION_CREATED, Version.CURRENT).put(IndexMetadata.SETTING_AUTO_EXPAND_REPLICAS, false).put(IndexMetadata.SETTING_INDEX_UUID, UUIDs.randomBase64UUID()).build()).numberOfShards(1).numberOfReplicas(1).putInSyncAllocationIds(0, Collections.singleton("randomAllocID")).putInSyncAllocationIds(1, Collections.singleton("randomAllocID2"))).put(IndexMetadata.builder(index2).settings(Settings.builder().put(IndexMetadata.SETTING_VERSION_CREATED, Version.CURRENT).put(IndexMetadata.SETTING_AUTO_EXPAND_REPLICAS, false).put(IndexMetadata.SETTING_INDEX_UUID, UUIDs.randomBase64UUID()).build()).numberOfShards(1).numberOfReplicas(1).putInSyncAllocationIds(0, Collections.singleton("randomAllocID")).putInSyncAllocationIds(1, Collections.singleton("randomAllocID2"))).put(IndexMetadata.builder(index3).settings(Settings.builder().put(IndexMetadata.SETTING_VERSION_CREATED, Version.CURRENT).put(IndexMetadata.SETTING_AUTO_EXPAND_REPLICAS, false).put(IndexMetadata.SETTING_INDEX_UUID, UUIDs.randomBase64UUID()).build()).numberOfShards(1).numberOfReplicas(1).putInSyncAllocationIds(0, Collections.singleton("randomAllocID")).putInSyncAllocationIds(1, Collections.singleton("randomAllocID2"))).build();
    RoutingTable routingTable = RoutingTable.builder().addAsRecovery(metadata.index(index1)).addAsRecovery(metadata.index(index2)).addAsRecovery(metadata.index(index3)).build();
    ClusterState clusterState = ClusterState.builder(ClusterName.CLUSTER_NAME_SETTING.getDefault(Settings.EMPTY)).metadata(metadata).routingTable(routingTable).build();
    final String node1 = "node1";
    final String node2 = "node2";
    clusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder().add(newNode(node1)).add(newNode(node2))).build();
    final ClusterState finalClusterState = allocation.reroute(clusterState, "reroute");
    logger.info("--> allocating same index primary in multiple commands should fail");
    assertThat(expectThrows(IllegalArgumentException.class, () -> {
        allocation.reroute(finalClusterState, new AllocationCommands(new AllocateStalePrimaryAllocationCommand(index1, 0, node1, true), new AllocateStalePrimaryAllocationCommand(index1, 0, node2, true)), false, false);
    }).getMessage(), containsString("primary [" + index1 + "][0] is already assigned"));
    assertThat(expectThrows(IllegalArgumentException.class, () -> {
        allocation.reroute(finalClusterState, new AllocationCommands(new AllocateEmptyPrimaryAllocationCommand(index2, 0, node1, true), new AllocateEmptyPrimaryAllocationCommand(index2, 0, node2, true)), false, false);
    }).getMessage(), containsString("primary [" + index2 + "][0] is already assigned"));
    clusterState = allocation.reroute(clusterState, new AllocationCommands(new AllocateEmptyPrimaryAllocationCommand(index3, 0, node1, true)), false, false).getClusterState();
    clusterState = startInitializingShardsAndReroute(allocation, clusterState);
    final ClusterState updatedClusterState = clusterState;
    assertThat(updatedClusterState.getRoutingNodes().node(node1).shardsWithState(STARTED).size(), equalTo(1));
    logger.info("--> subsequent replica allocation fails as all configured replicas have been allocated");
    assertThat(expectThrows(IllegalArgumentException.class, () -> {
        allocation.reroute(updatedClusterState, new AllocationCommands(new AllocateReplicaAllocationCommand(index3, 0, node2), new AllocateReplicaAllocationCommand(index3, 0, node2)), false, false);
    }).getMessage(), containsString("all copies of [" + index3 + "][0] are already assigned. Use the move allocation command instead"));
}

Example 7 with AllocateEmptyPrimaryAllocationCommand

use of org.elasticsearch.cluster.routing.allocation.command.AllocateEmptyPrimaryAllocationCommand in project crate by crate.

the class AllocationCommandsTests method testCancelCommand.

@Test
public void testCancelCommand() {
    AllocationService allocation = createAllocationService(Settings.builder().put(EnableAllocationDecider.CLUSTER_ROUTING_ALLOCATION_ENABLE_SETTING.getKey(), "none").put(EnableAllocationDecider.CLUSTER_ROUTING_REBALANCE_ENABLE_SETTING.getKey(), "none").build());
    logger.info("--> building initial routing table");
    Metadata metadata = Metadata.builder().put(IndexMetadata.builder("test").settings(settings(Version.CURRENT)).numberOfShards(1).numberOfReplicas(1)).build();
    RoutingTable routingTable = RoutingTable.builder().addAsNew(metadata.index("test")).build();
    ClusterState clusterState = ClusterState.builder(org.elasticsearch.cluster.ClusterName.CLUSTER_NAME_SETTING.getDefault(Settings.EMPTY)).metadata(metadata).routingTable(routingTable).build();
    logger.info("--> adding 3 nodes");
    clusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder().add(newNode("node1")).add(newNode("node2")).add(newNode("node3"))).build();
    clusterState = allocation.reroute(clusterState, "reroute");
    assertThat(clusterState.getRoutingNodes().shardsWithState(INITIALIZING).size(), equalTo(0));
    logger.info("--> allocating empty primary shard with accept_data_loss flag set to true");
    ClusterState newState = allocation.reroute(clusterState, new AllocationCommands(new AllocateEmptyPrimaryAllocationCommand("test", 0, "node1", true)), false, false).getClusterState();
    assertThat(newState, not(equalTo(clusterState)));
    clusterState = newState;
    assertThat(clusterState.getRoutingNodes().node("node1").size(), equalTo(1));
    assertThat(clusterState.getRoutingNodes().node("node1").shardsWithState(INITIALIZING).size(), equalTo(1));
    assertThat(clusterState.getRoutingNodes().node("node2").size(), equalTo(0));
    logger.info("--> cancel primary allocation, make sure it fails...");
    try {
        allocation.reroute(clusterState, new AllocationCommands(new CancelAllocationCommand("test", 0, "node1", false)), false, false);
        fail();
    } catch (IllegalArgumentException e) {
    }
    logger.info("--> start the primary shard");
    clusterState = startInitializingShardsAndReroute(allocation, clusterState);
    assertThat(clusterState.getRoutingNodes().node("node1").size(), equalTo(1));
    assertThat(clusterState.getRoutingNodes().node("node1").shardsWithState(STARTED).size(), equalTo(1));
    assertThat(clusterState.getRoutingNodes().node("node2").size(), equalTo(0));
    logger.info("--> cancel primary allocation, make sure it fails...");
    try {
        allocation.reroute(clusterState, new AllocationCommands(new CancelAllocationCommand("test", 0, "node1", false)), false, false);
        fail();
    } catch (IllegalArgumentException e) {
    }
    logger.info("--> allocate the replica shard on on the second node");
    newState = allocation.reroute(clusterState, new AllocationCommands(new AllocateReplicaAllocationCommand("test", 0, "node2")), false, false).getClusterState();
    assertThat(newState, not(equalTo(clusterState)));
    clusterState = newState;
    assertThat(clusterState.getRoutingNodes().node("node1").size(), equalTo(1));
    assertThat(clusterState.getRoutingNodes().node("node1").shardsWithState(STARTED).size(), equalTo(1));
    assertThat(clusterState.getRoutingNodes().node("node2").size(), equalTo(1));
    assertThat(clusterState.getRoutingNodes().node("node2").shardsWithState(INITIALIZING).size(), equalTo(1));
    logger.info("--> cancel the relocation allocation");
    newState = allocation.reroute(clusterState, new AllocationCommands(new CancelAllocationCommand("test", 0, "node2", false)), false, false).getClusterState();
    assertThat(newState, not(equalTo(clusterState)));
    clusterState = newState;
    assertThat(clusterState.getRoutingNodes().node("node1").size(), equalTo(1));
    assertThat(clusterState.getRoutingNodes().node("node1").shardsWithState(STARTED).size(), equalTo(1));
    assertThat(clusterState.getRoutingNodes().node("node2").size(), equalTo(0));
    assertThat(clusterState.getRoutingNodes().node("node3").size(), equalTo(0));
    logger.info("--> allocate the replica shard on on the second node");
    newState = allocation.reroute(clusterState, new AllocationCommands(new AllocateReplicaAllocationCommand("test", 0, "node2")), false, false).getClusterState();
    assertThat(newState, not(equalTo(clusterState)));
    clusterState = newState;
    assertThat(clusterState.getRoutingNodes().node("node1").size(), equalTo(1));
    assertThat(clusterState.getRoutingNodes().node("node1").shardsWithState(STARTED).size(), equalTo(1));
    assertThat(clusterState.getRoutingNodes().node("node2").size(), equalTo(1));
    assertThat(clusterState.getRoutingNodes().node("node2").shardsWithState(INITIALIZING).size(), equalTo(1));
    logger.info("--> cancel the primary being replicated, make sure it fails");
    try {
        allocation.reroute(clusterState, new AllocationCommands(new CancelAllocationCommand("test", 0, "node1", false)), false, false);
        fail();
    } catch (IllegalArgumentException e) {
    }
    logger.info("--> start the replica shard");
    clusterState = startInitializingShardsAndReroute(allocation, clusterState);
    assertThat(clusterState.getRoutingNodes().node("node1").size(), equalTo(1));
    assertThat(clusterState.getRoutingNodes().node("node1").shardsWithState(STARTED).size(), equalTo(1));
    assertThat(clusterState.getRoutingNodes().node("node2").size(), equalTo(1));
    assertThat(clusterState.getRoutingNodes().node("node2").shardsWithState(STARTED).size(), equalTo(1));
    logger.info("--> cancel allocation of the replica shard");
    newState = allocation.reroute(clusterState, new AllocationCommands(new CancelAllocationCommand("test", 0, "node2", false)), false, false).getClusterState();
    assertThat(newState, not(equalTo(clusterState)));
    clusterState = newState;
    assertThat(clusterState.getRoutingNodes().node("node1").size(), equalTo(1));
    assertThat(clusterState.getRoutingNodes().node("node1").shardsWithState(STARTED).size(), equalTo(1));
    assertThat(clusterState.getRoutingNodes().node("node2").size(), equalTo(0));
    assertThat(clusterState.getRoutingNodes().node("node3").size(), equalTo(0));
    logger.info("--> allocate the replica shard on on the second node");
    newState = allocation.reroute(clusterState, new AllocationCommands(new AllocateReplicaAllocationCommand("test", 0, "node2")), false, false).getClusterState();
    assertThat(newState, not(equalTo(clusterState)));
    clusterState = newState;
    assertThat(clusterState.getRoutingNodes().node("node1").size(), equalTo(1));
    assertThat(clusterState.getRoutingNodes().node("node1").shardsWithState(STARTED).size(), equalTo(1));
    assertThat(clusterState.getRoutingNodes().node("node2").size(), equalTo(1));
    assertThat(clusterState.getRoutingNodes().node("node2").shardsWithState(INITIALIZING).size(), equalTo(1));
    logger.info("--> start the replica shard");
    clusterState = startInitializingShardsAndReroute(allocation, clusterState);
    assertThat(clusterState.getRoutingNodes().node("node1").size(), equalTo(1));
    assertThat(clusterState.getRoutingNodes().node("node1").shardsWithState(STARTED).size(), equalTo(1));
    assertThat(clusterState.getRoutingNodes().node("node2").size(), equalTo(1));
    assertThat(clusterState.getRoutingNodes().node("node2").shardsWithState(STARTED).size(), equalTo(1));
    logger.info("--> move the replica shard");
    clusterState = allocation.reroute(clusterState, new AllocationCommands(new MoveAllocationCommand("test", 0, "node2", "node3")), false, false).getClusterState();
    assertThat(clusterState.getRoutingNodes().node("node1").size(), equalTo(1));
    assertThat(clusterState.getRoutingNodes().node("node1").shardsWithState(STARTED).size(), equalTo(1));
    assertThat(clusterState.getRoutingNodes().node("node2").size(), equalTo(1));
    assertThat(clusterState.getRoutingNodes().node("node2").shardsWithState(RELOCATING).size(), equalTo(1));
    assertThat(clusterState.getRoutingNodes().node("node3").size(), equalTo(1));
    assertThat(clusterState.getRoutingNodes().node("node3").shardsWithState(INITIALIZING).size(), equalTo(1));
    if (randomBoolean()) {
        logger.info("--> cancel the primary allocation (with allow_primary set to true)");
        newState = allocation.reroute(clusterState, new AllocationCommands(new CancelAllocationCommand("test", 0, "node1", true)), false, false).getClusterState();
        assertThat(newState, not(equalTo(clusterState)));
        clusterState = newState;
        assertThat(clusterState.getRoutingNodes().node("node1").size(), equalTo(0));
        assertThat(clusterState.getRoutingNodes().node("node2").shardsWithState(STARTED).iterator().next().primary(), equalTo(true));
        assertThat(clusterState.getRoutingNodes().node("node3").size(), equalTo(0));
    } else {
        logger.info("--> cancel the move of the replica shard");
        clusterState = allocation.reroute(clusterState, new AllocationCommands(new CancelAllocationCommand("test", 0, "node3", false)), false, false).getClusterState();
        assertThat(clusterState.getRoutingNodes().node("node1").size(), equalTo(1));
        assertThat(clusterState.getRoutingNodes().node("node1").shardsWithState(STARTED).size(), equalTo(1));
        assertThat(clusterState.getRoutingNodes().node("node2").size(), equalTo(1));
        assertThat(clusterState.getRoutingNodes().node("node2").shardsWithState(STARTED).size(), equalTo(1));
        logger.info("--> move the replica shard again");
        clusterState = allocation.reroute(clusterState, new AllocationCommands(new MoveAllocationCommand("test", 0, "node2", "node3")), false, false).getClusterState();
        assertThat(clusterState.getRoutingNodes().node("node1").size(), equalTo(1));
        assertThat(clusterState.getRoutingNodes().node("node1").shardsWithState(STARTED).size(), equalTo(1));
        assertThat(clusterState.getRoutingNodes().node("node2").size(), equalTo(1));
        assertThat(clusterState.getRoutingNodes().node("node2").shardsWithState(RELOCATING).size(), equalTo(1));
        assertThat(clusterState.getRoutingNodes().node("node3").size(), equalTo(1));
        assertThat(clusterState.getRoutingNodes().node("node3").shardsWithState(INITIALIZING).size(), equalTo(1));
        logger.info("--> cancel the source replica shard");
        clusterState = allocation.reroute(clusterState, new AllocationCommands(new CancelAllocationCommand("test", 0, "node2", false)), false, false).getClusterState();
        assertThat(clusterState.getRoutingNodes().node("node1").size(), equalTo(1));
        assertThat(clusterState.getRoutingNodes().node("node1").shardsWithState(STARTED).size(), equalTo(1));
        assertThat(clusterState.getRoutingNodes().node("node2").size(), equalTo(0));
        assertThat(clusterState.getRoutingNodes().node("node3").size(), equalTo(1));
        assertThat(clusterState.getRoutingNodes().node("node3").shardsWithState(INITIALIZING).size(), equalTo(1));
        assertThat(clusterState.getRoutingNodes().node("node3").shardsWithState(INITIALIZING).get(0).relocatingNodeId(), nullValue());
        logger.info("--> start the former target replica shard");
        clusterState = startInitializingShardsAndReroute(allocation, clusterState);
        assertThat(clusterState.getRoutingNodes().node("node1").size(), equalTo(1));
        assertThat(clusterState.getRoutingNodes().node("node1").shardsWithState(STARTED).size(), equalTo(1));
        assertThat(clusterState.getRoutingNodes().node("node2").size(), equalTo(0));
        assertThat(clusterState.getRoutingNodes().node("node3").shardsWithState(STARTED).size(), equalTo(1));
        logger.info("--> cancel the primary allocation (with allow_primary set to true)");
        newState = allocation.reroute(clusterState, new AllocationCommands(new CancelAllocationCommand("test", 0, "node1", true)), false, false).getClusterState();
        assertThat(newState, not(equalTo(clusterState)));
        clusterState = newState;
        assertThat(clusterState.getRoutingNodes().node("node3").shardsWithState(STARTED).iterator().next().primary(), equalTo(true));
        assertThat(clusterState.getRoutingNodes().node("node1").size(), equalTo(0));
        assertThat(clusterState.getRoutingNodes().node("node2").size(), equalTo(0));
    }
}

Example 8 with AllocateEmptyPrimaryAllocationCommand

use of org.elasticsearch.cluster.routing.allocation.command.AllocateEmptyPrimaryAllocationCommand in project elasticsearch by elastic.

the class ClusterRerouteTests method testSerializeRequest.

public void testSerializeRequest() throws IOException {
    ClusterRerouteRequest req = new ClusterRerouteRequest();
    req.setRetryFailed(randomBoolean());
    req.dryRun(randomBoolean());
    req.explain(randomBoolean());
    req.add(new AllocateEmptyPrimaryAllocationCommand("foo", 1, "bar", randomBoolean()));
    req.timeout(TimeValue.timeValueMillis(randomIntBetween(0, 100)));
    BytesStreamOutput out = new BytesStreamOutput();
    req.writeTo(out);
    BytesReference bytes = out.bytes();
    NamedWriteableRegistry namedWriteableRegistry = new NamedWriteableRegistry(NetworkModule.getNamedWriteables());
    StreamInput wrap = new NamedWriteableAwareStreamInput(bytes.streamInput(), namedWriteableRegistry);
    ClusterRerouteRequest deserializedReq = new ClusterRerouteRequest();
    deserializedReq.readFrom(wrap);
    assertEquals(req.isRetryFailed(), deserializedReq.isRetryFailed());
    assertEquals(req.dryRun(), deserializedReq.dryRun());
    assertEquals(req.explain(), deserializedReq.explain());
    assertEquals(req.timeout(), deserializedReq.timeout());
    // allocation commands have their own tests
    assertEquals(1, deserializedReq.getCommands().commands().size());
    assertEquals(req.getCommands().commands().size(), deserializedReq.getCommands().commands().size());
}

Example 9 with AllocateEmptyPrimaryAllocationCommand

use of org.elasticsearch.cluster.routing.allocation.command.AllocateEmptyPrimaryAllocationCommand in project elasticsearch by elastic.

the class InSyncAllocationIdTests method testInSyncAllocationIdsUpdated.

public void testInSyncAllocationIdsUpdated() {
    logger.info("creating an index with 1 shard, 2 replicas");
    MetaData metaData = MetaData.builder().put(IndexMetaData.builder("test").settings(settings(Version.CURRENT)).numberOfShards(1).numberOfReplicas(2)).put(IndexMetaData.builder("test-old").settings(settings(Version.CURRENT)).numberOfShards(1).numberOfReplicas(2).putInSyncAllocationIds(0, new HashSet<>(Arrays.asList("x", "y")))).build();
    RoutingTable routingTable = RoutingTable.builder().addAsNew(metaData.index("test")).build();
    ClusterState clusterState = ClusterState.builder(org.elasticsearch.cluster.ClusterName.CLUSTER_NAME_SETTING.getDefault(Settings.EMPTY)).metaData(metaData).routingTable(routingTable).build();
    logger.info("adding three nodes and performing rerouting");
    clusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder().add(newNode("node1")).add(newNode("node2")).add(newNode("node3"))).build();
    clusterState = allocation.reroute(clusterState, "reroute");
    assertThat(clusterState.metaData().index("test").inSyncAllocationIds(0).size(), equalTo(0));
    assertThat(clusterState.metaData().index("test-old").inSyncAllocationIds(0), equalTo(new HashSet<>(Arrays.asList("x", "y"))));
    logger.info("start primary shard");
    clusterState = allocation.applyStartedShards(clusterState, clusterState.getRoutingNodes().shardsWithState(INITIALIZING));
    assertThat(clusterState.getRoutingTable().shardsWithState(STARTED).size(), equalTo(1));
    assertThat(clusterState.metaData().index("test").inSyncAllocationIds(0).size(), equalTo(1));
    assertThat(clusterState.getRoutingTable().shardsWithState(STARTED).get(0).allocationId().getId(), equalTo(clusterState.metaData().index("test").inSyncAllocationIds(0).iterator().next()));
    assertThat(clusterState.metaData().index("test-old").inSyncAllocationIds(0), equalTo(new HashSet<>(Arrays.asList("x", "y"))));
    logger.info("start replica shards");
    clusterState = allocation.applyStartedShards(clusterState, clusterState.getRoutingNodes().shardsWithState(INITIALIZING));
    assertThat(clusterState.metaData().index("test").inSyncAllocationIds(0).size(), equalTo(3));
    logger.info("remove a node");
    clusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder(clusterState.nodes()).remove("node1")).build();
    clusterState = allocation.deassociateDeadNodes(clusterState, true, "reroute");
    // in-sync allocation ids should not be updated
    assertThat(clusterState.metaData().index("test").inSyncAllocationIds(0).size(), equalTo(3));
    logger.info("remove all remaining nodes");
    clusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder(clusterState.nodes()).remove("node2").remove("node3")).build();
    clusterState = allocation.deassociateDeadNodes(clusterState, true, "reroute");
    // in-sync allocation ids should not be updated
    assertThat(clusterState.getRoutingTable().shardsWithState(UNASSIGNED).size(), equalTo(3));
    assertThat(clusterState.metaData().index("test").inSyncAllocationIds(0).size(), equalTo(3));
    // force empty primary
    clusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder(clusterState.nodes()).add(newNode("node1"))).build();
    clusterState = allocation.reroute(clusterState, new AllocationCommands(new AllocateEmptyPrimaryAllocationCommand("test", 0, "node1", true)), false, false).getClusterState();
    // check that in-sync allocation ids are reset by forcing an empty primary
    assertThat(clusterState.metaData().index("test").inSyncAllocationIds(0).size(), equalTo(0));
    logger.info("start primary shard");
    clusterState = allocation.applyStartedShards(clusterState, clusterState.getRoutingNodes().shardsWithState(INITIALIZING));
    assertThat(clusterState.getRoutingTable().shardsWithState(STARTED).size(), equalTo(1));
    assertThat(clusterState.metaData().index("test").inSyncAllocationIds(0).size(), equalTo(1));
    logger.info("fail primary shard");
    ShardRouting startedPrimary = clusterState.getRoutingNodes().shardsWithState(STARTED).get(0);
    clusterState = allocation.applyFailedShard(clusterState, startedPrimary);
    assertThat(clusterState.getRoutingTable().shardsWithState(STARTED).size(), equalTo(0));
    assertEquals(Collections.singleton(startedPrimary.allocationId().getId()), clusterState.metaData().index("test").inSyncAllocationIds(0));
}

Example 10 with AllocateEmptyPrimaryAllocationCommand

use of org.elasticsearch.cluster.routing.allocation.command.AllocateEmptyPrimaryAllocationCommand in project elasticsearch by elastic.

the class AllocationCommandsTests method testSerialization.

public void testSerialization() throws Exception {
    AllocationCommands commands = new AllocationCommands(new AllocateEmptyPrimaryAllocationCommand("test", 1, "node1", true), new AllocateStalePrimaryAllocationCommand("test", 2, "node1", true), new AllocateReplicaAllocationCommand("test", 2, "node1"), new MoveAllocationCommand("test", 3, "node2", "node3"), new CancelAllocationCommand("test", 4, "node5", true));
    BytesStreamOutput bytes = new BytesStreamOutput();
    AllocationCommands.writeTo(commands, bytes);
    StreamInput in = bytes.bytes().streamInput();
    // Since the commands are named writeable we need to register them and wrap the input stream
    NamedWriteableRegistry namedWriteableRegistry = new NamedWriteableRegistry(NetworkModule.getNamedWriteables());
    in = new NamedWriteableAwareStreamInput(in, namedWriteableRegistry);
    // Now we can read them!
    AllocationCommands sCommands = AllocationCommands.readFrom(in);
    assertThat(sCommands.commands().size(), equalTo(5));
    assertThat(((AllocateEmptyPrimaryAllocationCommand) (sCommands.commands().get(0))).shardId(), equalTo(1));
    assertThat(((AllocateEmptyPrimaryAllocationCommand) (sCommands.commands().get(0))).index(), equalTo("test"));
    assertThat(((AllocateEmptyPrimaryAllocationCommand) (sCommands.commands().get(0))).node(), equalTo("node1"));
    assertThat(((AllocateEmptyPrimaryAllocationCommand) (sCommands.commands().get(0))).acceptDataLoss(), equalTo(true));
    assertThat(((AllocateStalePrimaryAllocationCommand) (sCommands.commands().get(1))).shardId(), equalTo(2));
    assertThat(((AllocateStalePrimaryAllocationCommand) (sCommands.commands().get(1))).index(), equalTo("test"));
    assertThat(((AllocateStalePrimaryAllocationCommand) (sCommands.commands().get(1))).node(), equalTo("node1"));
    assertThat(((AllocateStalePrimaryAllocationCommand) (sCommands.commands().get(1))).acceptDataLoss(), equalTo(true));
    assertThat(((AllocateReplicaAllocationCommand) (sCommands.commands().get(2))).shardId(), equalTo(2));
    assertThat(((AllocateReplicaAllocationCommand) (sCommands.commands().get(2))).index(), equalTo("test"));
    assertThat(((AllocateReplicaAllocationCommand) (sCommands.commands().get(2))).node(), equalTo("node1"));
    assertThat(((MoveAllocationCommand) (sCommands.commands().get(3))).shardId(), equalTo(3));
    assertThat(((MoveAllocationCommand) (sCommands.commands().get(3))).index(), equalTo("test"));
    assertThat(((MoveAllocationCommand) (sCommands.commands().get(3))).fromNode(), equalTo("node2"));
    assertThat(((MoveAllocationCommand) (sCommands.commands().get(3))).toNode(), equalTo("node3"));
    assertThat(((CancelAllocationCommand) (sCommands.commands().get(4))).shardId(), equalTo(4));
    assertThat(((CancelAllocationCommand) (sCommands.commands().get(4))).index(), equalTo("test"));
    assertThat(((CancelAllocationCommand) (sCommands.commands().get(4))).node(), equalTo("node5"));
    assertThat(((CancelAllocationCommand) (sCommands.commands().get(4))).allowPrimary(), equalTo(true));
}