Examples with ObjectObjectCursor com.carrotsearch.hppc.cursors.ObjectObjectCursor used on opensource projects

Example 11 with ObjectObjectCursor

use of com.carrotsearch.hppc.cursors.ObjectObjectCursor in project crate by crate.

the class SnapshotShardsService method startNewSnapshots.

private void startNewSnapshots(SnapshotsInProgress snapshotsInProgress) {
    // For now we will be mostly dealing with a single snapshot at a time but might have multiple simultaneously running
    // snapshots in the future
    // Now go through all snapshots and update existing or create missing
    final String localNodeId = clusterService.localNode().getId();
    for (SnapshotsInProgress.Entry entry : snapshotsInProgress.entries()) {
        final State entryState = entry.state();
        if (entryState == State.STARTED) {
            Map<ShardId, IndexShardSnapshotStatus> startedShards = null;
            final Snapshot snapshot = entry.snapshot();
            Map<ShardId, IndexShardSnapshotStatus> snapshotShards = shardSnapshots.getOrDefault(snapshot, emptyMap());
            for (ObjectObjectCursor<ShardId, ShardSnapshotStatus> shard : entry.shards()) {
                // Add all new shards to start processing on
                final ShardId shardId = shard.key;
                final ShardSnapshotStatus shardSnapshotStatus = shard.value;
                if (localNodeId.equals(shardSnapshotStatus.nodeId()) && shardSnapshotStatus.state() == ShardState.INIT && snapshotShards.containsKey(shardId) == false) {
                    LOGGER.trace("[{}] - Adding shard to the queue", shardId);
                    if (startedShards == null) {
                        startedShards = new HashMap<>();
                    }
                    startedShards.put(shardId, IndexShardSnapshotStatus.newInitializing(shardSnapshotStatus.generation()));
                }
            }
            if (startedShards != null && startedShards.isEmpty() == false) {
                shardSnapshots.computeIfAbsent(snapshot, s -> new HashMap<>()).putAll(startedShards);
                startNewShards(entry, startedShards);
            }
        } else if (entryState == State.ABORTED) {
            // Abort all running shards for this snapshot
            final Snapshot snapshot = entry.snapshot();
            Map<ShardId, IndexShardSnapshotStatus> snapshotShards = shardSnapshots.getOrDefault(snapshot, emptyMap());
            for (ObjectObjectCursor<ShardId, ShardSnapshotStatus> shard : entry.shards()) {
                final IndexShardSnapshotStatus snapshotStatus = snapshotShards.get(shard.key);
                if (snapshotStatus == null) {
                    // notify master that abort has completed by moving to FAILED
                    if (shard.value.state() == ShardState.ABORTED) {
                        notifyFailedSnapshotShard(snapshot, shard.key, shard.value.reason());
                    }
                } else {
                    snapshotStatus.abortIfNotCompleted("snapshot has been aborted");
                }
            }
        }
    }
}

Example 12 with ObjectObjectCursor

use of com.carrotsearch.hppc.cursors.ObjectObjectCursor in project elasticsearch by elastic.

the class MetaDataCreateIndexService method onlyCreateIndex.

private void onlyCreateIndex(final CreateIndexClusterStateUpdateRequest request, final ActionListener<ClusterStateUpdateResponse> listener) {
    Settings.Builder updatedSettingsBuilder = Settings.builder();
    updatedSettingsBuilder.put(request.settings()).normalizePrefix(IndexMetaData.INDEX_SETTING_PREFIX);
    indexScopedSettings.validate(updatedSettingsBuilder);
    request.settings(updatedSettingsBuilder.build());
    clusterService.submitStateUpdateTask("create-index [" + request.index() + "], cause [" + request.cause() + "]", new AckedClusterStateUpdateTask<ClusterStateUpdateResponse>(Priority.URGENT, request, wrapPreservingContext(listener)) {

        @Override
        protected ClusterStateUpdateResponse newResponse(boolean acknowledged) {
            return new ClusterStateUpdateResponse(acknowledged);
        }

        @Override
        public ClusterState execute(ClusterState currentState) throws Exception {
            Index createdIndex = null;
            String removalExtraInfo = null;
            IndexRemovalReason removalReason = IndexRemovalReason.FAILURE;
            try {
                validate(request, currentState);
                for (Alias alias : request.aliases()) {
                    aliasValidator.validateAlias(alias, request.index(), currentState.metaData());
                }
                // we only find a template when its an API call (a new index)
                // find templates, highest order are better matching
                List<IndexTemplateMetaData> templates = findTemplates(request, currentState);
                Map<String, Custom> customs = new HashMap<>();
                // add the request mapping
                Map<String, Map<String, Object>> mappings = new HashMap<>();
                Map<String, AliasMetaData> templatesAliases = new HashMap<>();
                List<String> templateNames = new ArrayList<>();
                for (Map.Entry<String, String> entry : request.mappings().entrySet()) {
                    mappings.put(entry.getKey(), MapperService.parseMapping(xContentRegistry, entry.getValue()));
                }
                for (Map.Entry<String, Custom> entry : request.customs().entrySet()) {
                    customs.put(entry.getKey(), entry.getValue());
                }
                // apply templates, merging the mappings into the request mapping if exists
                for (IndexTemplateMetaData template : templates) {
                    templateNames.add(template.getName());
                    for (ObjectObjectCursor<String, CompressedXContent> cursor : template.mappings()) {
                        String mappingString = cursor.value.string();
                        if (mappings.containsKey(cursor.key)) {
                            XContentHelper.mergeDefaults(mappings.get(cursor.key), MapperService.parseMapping(xContentRegistry, mappingString));
                        } else {
                            mappings.put(cursor.key, MapperService.parseMapping(xContentRegistry, mappingString));
                        }
                    }
                    // handle custom
                    for (ObjectObjectCursor<String, Custom> cursor : template.customs()) {
                        String type = cursor.key;
                        IndexMetaData.Custom custom = cursor.value;
                        IndexMetaData.Custom existing = customs.get(type);
                        if (existing == null) {
                            customs.put(type, custom);
                        } else {
                            IndexMetaData.Custom merged = existing.mergeWith(custom);
                            customs.put(type, merged);
                        }
                    }
                    //handle aliases
                    for (ObjectObjectCursor<String, AliasMetaData> cursor : template.aliases()) {
                        AliasMetaData aliasMetaData = cursor.value;
                        // ignore this one taken from the index template
                        if (request.aliases().contains(new Alias(aliasMetaData.alias()))) {
                            continue;
                        }
                        //if an alias with same name was already processed, ignore this one
                        if (templatesAliases.containsKey(cursor.key)) {
                            continue;
                        }
                        //Allow templatesAliases to be templated by replacing a token with the name of the index that we are applying it to
                        if (aliasMetaData.alias().contains("{index}")) {
                            String templatedAlias = aliasMetaData.alias().replace("{index}", request.index());
                            aliasMetaData = AliasMetaData.newAliasMetaData(aliasMetaData, templatedAlias);
                        }
                        aliasValidator.validateAliasMetaData(aliasMetaData, request.index(), currentState.metaData());
                        templatesAliases.put(aliasMetaData.alias(), aliasMetaData);
                    }
                }
                Settings.Builder indexSettingsBuilder = Settings.builder();
                // apply templates, here, in reverse order, since first ones are better matching
                for (int i = templates.size() - 1; i >= 0; i--) {
                    indexSettingsBuilder.put(templates.get(i).settings());
                }
                // now, put the request settings, so they override templates
                indexSettingsBuilder.put(request.settings());
                if (indexSettingsBuilder.get(SETTING_NUMBER_OF_SHARDS) == null) {
                    indexSettingsBuilder.put(SETTING_NUMBER_OF_SHARDS, settings.getAsInt(SETTING_NUMBER_OF_SHARDS, 5));
                }
                if (indexSettingsBuilder.get(SETTING_NUMBER_OF_REPLICAS) == null) {
                    indexSettingsBuilder.put(SETTING_NUMBER_OF_REPLICAS, settings.getAsInt(SETTING_NUMBER_OF_REPLICAS, 1));
                }
                if (settings.get(SETTING_AUTO_EXPAND_REPLICAS) != null && indexSettingsBuilder.get(SETTING_AUTO_EXPAND_REPLICAS) == null) {
                    indexSettingsBuilder.put(SETTING_AUTO_EXPAND_REPLICAS, settings.get(SETTING_AUTO_EXPAND_REPLICAS));
                }
                if (indexSettingsBuilder.get(SETTING_VERSION_CREATED) == null) {
                    DiscoveryNodes nodes = currentState.nodes();
                    final Version createdVersion = Version.min(Version.CURRENT, nodes.getSmallestNonClientNodeVersion());
                    indexSettingsBuilder.put(SETTING_VERSION_CREATED, createdVersion);
                }
                if (indexSettingsBuilder.get(SETTING_CREATION_DATE) == null) {
                    indexSettingsBuilder.put(SETTING_CREATION_DATE, new DateTime(DateTimeZone.UTC).getMillis());
                }
                indexSettingsBuilder.put(IndexMetaData.SETTING_INDEX_PROVIDED_NAME, request.getProvidedName());
                indexSettingsBuilder.put(SETTING_INDEX_UUID, UUIDs.randomBase64UUID());
                final Index shrinkFromIndex = request.shrinkFrom();
                int routingNumShards = IndexMetaData.INDEX_NUMBER_OF_SHARDS_SETTING.get(indexSettingsBuilder.build());
                ;
                if (shrinkFromIndex != null) {
                    prepareShrinkIndexSettings(currentState, mappings.keySet(), indexSettingsBuilder, shrinkFromIndex, request.index());
                    IndexMetaData sourceMetaData = currentState.metaData().getIndexSafe(shrinkFromIndex);
                    routingNumShards = sourceMetaData.getRoutingNumShards();
                }
                Settings actualIndexSettings = indexSettingsBuilder.build();
                IndexMetaData.Builder tmpImdBuilder = IndexMetaData.builder(request.index()).setRoutingNumShards(routingNumShards);
                // Set up everything, now locally create the index to see that things are ok, and apply
                final IndexMetaData tmpImd = tmpImdBuilder.settings(actualIndexSettings).build();
                ActiveShardCount waitForActiveShards = request.waitForActiveShards();
                if (waitForActiveShards == ActiveShardCount.DEFAULT) {
                    waitForActiveShards = tmpImd.getWaitForActiveShards();
                }
                if (waitForActiveShards.validate(tmpImd.getNumberOfReplicas()) == false) {
                    throw new IllegalArgumentException("invalid wait_for_active_shards[" + request.waitForActiveShards() + "]: cannot be greater than number of shard copies [" + (tmpImd.getNumberOfReplicas() + 1) + "]");
                }
                // create the index here (on the master) to validate it can be created, as well as adding the mapping
                final IndexService indexService = indicesService.createIndex(tmpImd, Collections.emptyList(), shardId -> {
                });
                createdIndex = indexService.index();
                // now add the mappings
                MapperService mapperService = indexService.mapperService();
                try {
                    mapperService.merge(mappings, MergeReason.MAPPING_UPDATE, request.updateAllTypes());
                } catch (Exception e) {
                    removalExtraInfo = "failed on parsing default mapping/mappings on index creation";
                    throw e;
                }
                // the context is only used for validation so it's fine to pass fake values for the shard id and the current
                // timestamp
                final QueryShardContext queryShardContext = indexService.newQueryShardContext(0, null, () -> 0L);
                for (Alias alias : request.aliases()) {
                    if (Strings.hasLength(alias.filter())) {
                        aliasValidator.validateAliasFilter(alias.name(), alias.filter(), queryShardContext, xContentRegistry);
                    }
                }
                for (AliasMetaData aliasMetaData : templatesAliases.values()) {
                    if (aliasMetaData.filter() != null) {
                        aliasValidator.validateAliasFilter(aliasMetaData.alias(), aliasMetaData.filter().uncompressed(), queryShardContext, xContentRegistry);
                    }
                }
                // now, update the mappings with the actual source
                Map<String, MappingMetaData> mappingsMetaData = new HashMap<>();
                for (DocumentMapper mapper : mapperService.docMappers(true)) {
                    MappingMetaData mappingMd = new MappingMetaData(mapper);
                    mappingsMetaData.put(mapper.type(), mappingMd);
                }
                final IndexMetaData.Builder indexMetaDataBuilder = IndexMetaData.builder(request.index()).settings(actualIndexSettings).setRoutingNumShards(routingNumShards);
                for (MappingMetaData mappingMd : mappingsMetaData.values()) {
                    indexMetaDataBuilder.putMapping(mappingMd);
                }
                for (AliasMetaData aliasMetaData : templatesAliases.values()) {
                    indexMetaDataBuilder.putAlias(aliasMetaData);
                }
                for (Alias alias : request.aliases()) {
                    AliasMetaData aliasMetaData = AliasMetaData.builder(alias.name()).filter(alias.filter()).indexRouting(alias.indexRouting()).searchRouting(alias.searchRouting()).build();
                    indexMetaDataBuilder.putAlias(aliasMetaData);
                }
                for (Map.Entry<String, Custom> customEntry : customs.entrySet()) {
                    indexMetaDataBuilder.putCustom(customEntry.getKey(), customEntry.getValue());
                }
                indexMetaDataBuilder.state(request.state());
                final IndexMetaData indexMetaData;
                try {
                    indexMetaData = indexMetaDataBuilder.build();
                } catch (Exception e) {
                    removalExtraInfo = "failed to build index metadata";
                    throw e;
                }
                indexService.getIndexEventListener().beforeIndexAddedToCluster(indexMetaData.getIndex(), indexMetaData.getSettings());
                MetaData newMetaData = MetaData.builder(currentState.metaData()).put(indexMetaData, false).build();
                String maybeShadowIndicator = indexMetaData.isIndexUsingShadowReplicas() ? "s" : "";
                logger.info("[{}] creating index, cause [{}], templates {}, shards [{}]/[{}{}], mappings {}", request.index(), request.cause(), templateNames, indexMetaData.getNumberOfShards(), indexMetaData.getNumberOfReplicas(), maybeShadowIndicator, mappings.keySet());
                ClusterBlocks.Builder blocks = ClusterBlocks.builder().blocks(currentState.blocks());
                if (!request.blocks().isEmpty()) {
                    for (ClusterBlock block : request.blocks()) {
                        blocks.addIndexBlock(request.index(), block);
                    }
                }
                blocks.updateBlocks(indexMetaData);
                ClusterState updatedState = ClusterState.builder(currentState).blocks(blocks).metaData(newMetaData).build();
                if (request.state() == State.OPEN) {
                    RoutingTable.Builder routingTableBuilder = RoutingTable.builder(updatedState.routingTable()).addAsNew(updatedState.metaData().index(request.index()));
                    updatedState = allocationService.reroute(ClusterState.builder(updatedState).routingTable(routingTableBuilder.build()).build(), "index [" + request.index() + "] created");
                }
                removalExtraInfo = "cleaning up after validating index on master";
                removalReason = IndexRemovalReason.NO_LONGER_ASSIGNED;
                return updatedState;
            } finally {
                if (createdIndex != null) {
                    // Index was already partially created - need to clean up
                    indicesService.removeIndex(createdIndex, removalReason, removalExtraInfo);
                }
            }
        }

        @Override
        public void onFailure(String source, Exception e) {
            if (e instanceof ResourceAlreadyExistsException) {
                logger.trace((Supplier<?>) () -> new ParameterizedMessage("[{}] failed to create", request.index()), e);
            } else {
                logger.debug((Supplier<?>) () -> new ParameterizedMessage("[{}] failed to create", request.index()), e);
            }
            super.onFailure(source, e);
        }
    });
}

Example 13 with ObjectObjectCursor

use of com.carrotsearch.hppc.cursors.ObjectObjectCursor in project elasticsearch by elastic.

the class RestGetIndicesAction method prepareRequest.

@Override
public RestChannelConsumer prepareRequest(final RestRequest request, final NodeClient client) throws IOException {
    String[] indices = Strings.splitStringByCommaToArray(request.param("index"));
    String[] featureParams = request.paramAsStringArray("type", null);
    // Work out if the indices is a list of features
    if (featureParams == null && indices.length > 0 && indices[0] != null && indices[0].startsWith("_") && !"_all".equals(indices[0])) {
        featureParams = indices;
        indices = new String[] { "_all" };
    }
    final GetIndexRequest getIndexRequest = new GetIndexRequest();
    getIndexRequest.indices(indices);
    if (featureParams != null) {
        Feature[] features = Feature.convertToFeatures(featureParams);
        getIndexRequest.features(features);
    }
    getIndexRequest.indicesOptions(IndicesOptions.fromRequest(request, getIndexRequest.indicesOptions()));
    getIndexRequest.local(request.paramAsBoolean("local", getIndexRequest.local()));
    getIndexRequest.humanReadable(request.paramAsBoolean("human", false));
    final boolean defaults = request.paramAsBoolean("include_defaults", false);
    return channel -> client.admin().indices().getIndex(getIndexRequest, new RestBuilderListener<GetIndexResponse>(channel) {

        @Override
        public RestResponse buildResponse(final GetIndexResponse response, final XContentBuilder builder) throws Exception {
            builder.startObject();
            {
                for (final String index : response.indices()) {
                    builder.startObject(index);
                    {
                        for (final Feature feature : getIndexRequest.features()) {
                            switch(feature) {
                                case ALIASES:
                                    writeAliases(response.aliases().get(index), builder, request);
                                    break;
                                case MAPPINGS:
                                    writeMappings(response.mappings().get(index), builder);
                                    break;
                                case SETTINGS:
                                    writeSettings(response.settings().get(index), builder, request, defaults);
                                    break;
                                default:
                                    throw new IllegalStateException("feature [" + feature + "] is not valid");
                            }
                        }
                    }
                    builder.endObject();
                }
            }
            builder.endObject();
            return new BytesRestResponse(OK, builder);
        }

        private void writeAliases(final List<AliasMetaData> aliases, final XContentBuilder builder, final Params params) throws IOException {
            builder.startObject("aliases");
            {
                if (aliases != null) {
                    for (final AliasMetaData alias : aliases) {
                        AliasMetaData.Builder.toXContent(alias, builder, params);
                    }
                }
            }
            builder.endObject();
        }

        private void writeMappings(final ImmutableOpenMap<String, MappingMetaData> mappings, final XContentBuilder builder) throws IOException {
            builder.startObject("mappings");
            {
                if (mappings != null) {
                    for (final ObjectObjectCursor<String, MappingMetaData> typeEntry : mappings) {
                        builder.field(typeEntry.key);
                        builder.map(typeEntry.value.sourceAsMap());
                    }
                }
            }
            builder.endObject();
        }

        private void writeSettings(final Settings settings, final XContentBuilder builder, final Params params, final boolean defaults) throws IOException {
            builder.startObject("settings");
            {
                settings.toXContent(builder, params);
            }
            builder.endObject();
            if (defaults) {
                builder.startObject("defaults");
                {
                    settingsFilter.filter(indexScopedSettings.diff(settings, RestGetIndicesAction.this.settings)).toXContent(builder, request);
                }
                builder.endObject();
            }
        }
    });
}

Example 14 with ObjectObjectCursor

use of com.carrotsearch.hppc.cursors.ObjectObjectCursor in project elasticsearch by elastic.

the class RestGetMappingAction method prepareRequest.

@Override
public RestChannelConsumer prepareRequest(final RestRequest request, final NodeClient client) throws IOException {
    final String[] indices = Strings.splitStringByCommaToArray(request.param("index"));
    final String[] types = request.paramAsStringArrayOrEmptyIfAll("type");
    GetMappingsRequest getMappingsRequest = new GetMappingsRequest();
    getMappingsRequest.indices(indices).types(types);
    getMappingsRequest.indicesOptions(IndicesOptions.fromRequest(request, getMappingsRequest.indicesOptions()));
    getMappingsRequest.local(request.paramAsBoolean("local", getMappingsRequest.local()));
    return channel -> client.admin().indices().getMappings(getMappingsRequest, new RestBuilderListener<GetMappingsResponse>(channel) {

        @Override
        public RestResponse buildResponse(GetMappingsResponse response, XContentBuilder builder) throws Exception {
            ImmutableOpenMap<String, ImmutableOpenMap<String, MappingMetaData>> mappingsByIndex = response.getMappings();
            if (mappingsByIndex.isEmpty()) {
                if (indices.length != 0 && types.length != 0) {
                    return new BytesRestResponse(OK, builder.startObject().endObject());
                } else if (indices.length != 0) {
                    builder.close();
                    return new BytesRestResponse(channel, new IndexNotFoundException(indices[0]));
                } else if (types.length != 0) {
                    builder.close();
                    return new BytesRestResponse(channel, new TypeMissingException("_all", types[0]));
                } else {
                    return new BytesRestResponse(OK, builder.startObject().endObject());
                }
            }
            builder.startObject();
            for (ObjectObjectCursor<String, ImmutableOpenMap<String, MappingMetaData>> indexEntry : mappingsByIndex) {
                if (indexEntry.value.isEmpty()) {
                    continue;
                }
                builder.startObject(indexEntry.key);
                builder.startObject(Fields.MAPPINGS);
                for (ObjectObjectCursor<String, MappingMetaData> typeEntry : indexEntry.value) {
                    builder.field(typeEntry.key);
                    builder.map(typeEntry.value.sourceAsMap());
                }
                builder.endObject();
                builder.endObject();
            }
            builder.endObject();
            return new BytesRestResponse(OK, builder);
        }
    });
}

Example 15 with ObjectObjectCursor

use of com.carrotsearch.hppc.cursors.ObjectObjectCursor in project elasticsearch by elastic.

the class SnapshotShardsService method processIndexShardSnapshots.

/**
     * Checks if any new shards should be snapshotted on this node
     *
     * @param event cluster state changed event
     */
private void processIndexShardSnapshots(ClusterChangedEvent event) {
    SnapshotsInProgress snapshotsInProgress = event.state().custom(SnapshotsInProgress.TYPE);
    Map<Snapshot, SnapshotShards> survivors = new HashMap<>();
    // First, remove snapshots that are no longer there
    for (Map.Entry<Snapshot, SnapshotShards> entry : shardSnapshots.entrySet()) {
        final Snapshot snapshot = entry.getKey();
        if (snapshotsInProgress != null && snapshotsInProgress.snapshot(snapshot) != null) {
            survivors.put(entry.getKey(), entry.getValue());
        } else {
            // state update, which is being processed here
            for (IndexShardSnapshotStatus snapshotStatus : entry.getValue().shards.values()) {
                if (snapshotStatus.stage() == Stage.INIT || snapshotStatus.stage() == Stage.STARTED) {
                    snapshotStatus.abort();
                }
            }
        }
    }
    // For now we will be mostly dealing with a single snapshot at a time but might have multiple simultaneously running
    // snapshots in the future
    Map<Snapshot, Map<ShardId, IndexShardSnapshotStatus>> newSnapshots = new HashMap<>();
    // Now go through all snapshots and update existing or create missing
    final String localNodeId = event.state().nodes().getLocalNodeId();
    final DiscoveryNode masterNode = event.state().nodes().getMasterNode();
    final Map<Snapshot, Map<String, IndexId>> snapshotIndices = new HashMap<>();
    if (snapshotsInProgress != null) {
        for (SnapshotsInProgress.Entry entry : snapshotsInProgress.entries()) {
            snapshotIndices.put(entry.snapshot(), entry.indices().stream().collect(Collectors.toMap(IndexId::getName, Function.identity())));
            if (entry.state() == State.STARTED) {
                Map<ShardId, IndexShardSnapshotStatus> startedShards = new HashMap<>();
                SnapshotShards snapshotShards = shardSnapshots.get(entry.snapshot());
                for (ObjectObjectCursor<ShardId, ShardSnapshotStatus> shard : entry.shards()) {
                    // Add all new shards to start processing on
                    if (localNodeId.equals(shard.value.nodeId())) {
                        if (shard.value.state() == State.INIT && (snapshotShards == null || !snapshotShards.shards.containsKey(shard.key))) {
                            logger.trace("[{}] - Adding shard to the queue", shard.key);
                            startedShards.put(shard.key, new IndexShardSnapshotStatus());
                        }
                    }
                }
                if (!startedShards.isEmpty()) {
                    newSnapshots.put(entry.snapshot(), startedShards);
                    if (snapshotShards != null) {
                        // We already saw this snapshot but we need to add more started shards
                        Map<ShardId, IndexShardSnapshotStatus> shards = new HashMap<>();
                        // Put all shards that were already running on this node
                        shards.putAll(snapshotShards.shards);
                        // Put all newly started shards
                        shards.putAll(startedShards);
                        survivors.put(entry.snapshot(), new SnapshotShards(unmodifiableMap(shards)));
                    } else {
                        // Brand new snapshot that we haven't seen before
                        survivors.put(entry.snapshot(), new SnapshotShards(unmodifiableMap(startedShards)));
                    }
                }
            } else if (entry.state() == State.ABORTED) {
                // Abort all running shards for this snapshot
                SnapshotShards snapshotShards = shardSnapshots.get(entry.snapshot());
                if (snapshotShards != null) {
                    for (ObjectObjectCursor<ShardId, ShardSnapshotStatus> shard : entry.shards()) {
                        IndexShardSnapshotStatus snapshotStatus = snapshotShards.shards.get(shard.key);
                        if (snapshotStatus != null) {
                            switch(snapshotStatus.stage()) {
                                case INIT:
                                case STARTED:
                                    snapshotStatus.abort();
                                    break;
                                case FINALIZE:
                                    logger.debug("[{}] trying to cancel snapshot on shard [{}] that is finalizing, letting it finish", entry.snapshot(), shard.key);
                                    break;
                                case DONE:
                                    logger.debug("[{}] trying to cancel snapshot on the shard [{}] that is already done, updating status on the master", entry.snapshot(), shard.key);
                                    updateIndexShardSnapshotStatus(entry.snapshot(), shard.key, new ShardSnapshotStatus(localNodeId, State.SUCCESS), masterNode);
                                    break;
                                case FAILURE:
                                    logger.debug("[{}] trying to cancel snapshot on the shard [{}] that has already failed, updating status on the master", entry.snapshot(), shard.key);
                                    updateIndexShardSnapshotStatus(entry.snapshot(), shard.key, new ShardSnapshotStatus(localNodeId, State.FAILED, snapshotStatus.failure()), masterNode);
                                    break;
                                default:
                                    throw new IllegalStateException("Unknown snapshot shard stage " + snapshotStatus.stage());
                            }
                        }
                    }
                }
            }
        }
    }
    // Update the list of snapshots that we saw and tried to started
    // If startup of these shards fails later, we don't want to try starting these shards again
    shutdownLock.lock();
    try {
        shardSnapshots = unmodifiableMap(survivors);
        if (shardSnapshots.isEmpty()) {
            // Notify all waiting threads that no more snapshots
            shutdownCondition.signalAll();
        }
    } finally {
        shutdownLock.unlock();
    }
    // We have new shards to starts
    if (newSnapshots.isEmpty() == false) {
        Executor executor = threadPool.executor(ThreadPool.Names.SNAPSHOT);
        for (final Map.Entry<Snapshot, Map<ShardId, IndexShardSnapshotStatus>> entry : newSnapshots.entrySet()) {
            Map<String, IndexId> indicesMap = snapshotIndices.get(entry.getKey());
            assert indicesMap != null;
            for (final Map.Entry<ShardId, IndexShardSnapshotStatus> shardEntry : entry.getValue().entrySet()) {
                final ShardId shardId = shardEntry.getKey();
                try {
                    final IndexShard indexShard = indicesService.indexServiceSafe(shardId.getIndex()).getShardOrNull(shardId.id());
                    final IndexId indexId = indicesMap.get(shardId.getIndexName());
                    assert indexId != null;
                    executor.execute(new AbstractRunnable() {

                        @Override
                        public void doRun() {
                            snapshot(indexShard, entry.getKey(), indexId, shardEntry.getValue());
                            updateIndexShardSnapshotStatus(entry.getKey(), shardId, new ShardSnapshotStatus(localNodeId, State.SUCCESS), masterNode);
                        }

                        @Override
                        public void onFailure(Exception e) {
                            logger.warn((Supplier<?>) () -> new ParameterizedMessage("[{}] [{}] failed to create snapshot", shardId, entry.getKey()), e);
                            updateIndexShardSnapshotStatus(entry.getKey(), shardId, new ShardSnapshotStatus(localNodeId, State.FAILED, ExceptionsHelper.detailedMessage(e)), masterNode);
                        }
                    });
                } catch (Exception e) {
                    updateIndexShardSnapshotStatus(entry.getKey(), shardId, new ShardSnapshotStatus(localNodeId, State.FAILED, ExceptionsHelper.detailedMessage(e)), masterNode);
                }
            }
        }
    }
}