Examples with CoordinatorStats io.druid.server.coordinator.CoordinatorStats used on opensource projects

Example 1 with CoordinatorStats

use of io.druid.server.coordinator.CoordinatorStats in project druid by druid-io.

the class LoadRule method drop.

private CoordinatorStats drop(final Map<String, Integer> loadStatus, final DataSegment segment, final DruidCoordinatorRuntimeParams params) {
    CoordinatorStats stats = new CoordinatorStats();
    // Make sure we have enough loaded replicants in the correct tiers in the cluster before doing anything
    for (Integer leftToLoad : loadStatus.values()) {
        if (leftToLoad > 0) {
            return stats;
        }
    }
    final ReplicationThrottler replicationManager = params.getReplicationManager();
    // Find all instances of this segment across tiers
    Map<String, Integer> replicantsByTier = params.getSegmentReplicantLookup().getClusterTiers(segment.getIdentifier());
    for (Map.Entry<String, Integer> entry : replicantsByTier.entrySet()) {
        final String tier = entry.getKey();
        int loadedNumReplicantsForTier = entry.getValue();
        int expectedNumReplicantsForTier = getNumReplicants(tier);
        stats.addToTieredStat(droppedCount, tier, 0);
        MinMaxPriorityQueue<ServerHolder> serverQueue = params.getDruidCluster().get(tier);
        if (serverQueue == null) {
            log.makeAlert("No holders found for tier[%s]", entry.getKey()).emit();
            continue;
        }
        List<ServerHolder> droppedServers = Lists.newArrayList();
        while (loadedNumReplicantsForTier > expectedNumReplicantsForTier) {
            final ServerHolder holder = serverQueue.pollLast();
            if (holder == null) {
                log.warn("Wtf, holder was null?  I have no servers serving [%s]?", segment.getIdentifier());
                break;
            }
            if (holder.isServingSegment(segment)) {
                holder.getPeon().dropSegment(segment, null);
                --loadedNumReplicantsForTier;
                stats.addToTieredStat(droppedCount, tier, 1);
            }
            droppedServers.add(holder);
        }
        serverQueue.addAll(droppedServers);
    }
    return stats;
}

Example 2 with CoordinatorStats

use of io.druid.server.coordinator.CoordinatorStats in project druid by druid-io.

the class LoadRule method assign.

private CoordinatorStats assign(final ReplicationThrottler replicationManager, final String tier, final int totalReplicantsInCluster, final int expectedReplicantsInTier, final int totalReplicantsInTier, final BalancerStrategy strategy, final List<ServerHolder> serverHolderList, final DataSegment segment) {
    final CoordinatorStats stats = new CoordinatorStats();
    stats.addToTieredStat(assignedCount, tier, 0);
    int currReplicantsInTier = totalReplicantsInTier;
    int currTotalReplicantsInCluster = totalReplicantsInCluster;
    while (currReplicantsInTier < expectedReplicantsInTier) {
        boolean replicate = currTotalReplicantsInCluster > 0;
        if (replicate && !replicationManager.canCreateReplicant(tier)) {
            break;
        }
        final ServerHolder holder = strategy.findNewSegmentHomeReplicator(segment, serverHolderList);
        if (holder == null) {
            log.warn("Not enough [%s] servers or node capacity to assign segment[%s]! Expected Replicants[%d]", tier, segment.getIdentifier(), expectedReplicantsInTier);
            break;
        }
        if (replicate) {
            replicationManager.registerReplicantCreation(tier, segment.getIdentifier(), holder.getServer().getHost());
        }
        holder.getPeon().loadSegment(segment, new LoadPeonCallback() {

            @Override
            public void execute() {
                replicationManager.unregisterReplicantCreation(tier, segment.getIdentifier(), holder.getServer().getHost());
            }
        });
        stats.addToTieredStat(assignedCount, tier, 1);
        ++currReplicantsInTier;
        ++currTotalReplicantsInCluster;
    }
    return stats;
}

Example 3 with CoordinatorStats

use of io.druid.server.coordinator.CoordinatorStats in project druid by druid-io.

the class DruidCoordinatorCleanupUnneeded method run.

@Override
public DruidCoordinatorRuntimeParams run(DruidCoordinatorRuntimeParams params) {
    CoordinatorStats stats = new CoordinatorStats();
    Set<DataSegment> availableSegments = params.getAvailableSegments();
    DruidCluster cluster = params.getDruidCluster();
    // cleanup before it finished polling the metadata storage for available segments for the first time.
    if (!availableSegments.isEmpty()) {
        for (MinMaxPriorityQueue<ServerHolder> serverHolders : cluster.getSortedServersByTier()) {
            for (ServerHolder serverHolder : serverHolders) {
                ImmutableDruidServer server = serverHolder.getServer();
                for (ImmutableDruidDataSource dataSource : server.getDataSources()) {
                    for (DataSegment segment : dataSource.getSegments()) {
                        if (!availableSegments.contains(segment)) {
                            LoadQueuePeon queuePeon = params.getLoadManagementPeons().get(server.getName());
                            if (!queuePeon.getSegmentsToDrop().contains(segment)) {
                                queuePeon.dropSegment(segment, new LoadPeonCallback() {

                                    @Override
                                    public void execute() {
                                    }
                                });
                                stats.addToTieredStat("unneededCount", server.getTier(), 1);
                            }
                        }
                    }
                }
            }
        }
    } else {
        log.info("Found 0 availableSegments, skipping the cleanup of segments from historicals. This is done to prevent a race condition in which the coordinator would drop all segments if it started running cleanup before it finished polling the metadata storage for available segments for the first time.");
    }
    return params.buildFromExisting().withCoordinatorStats(stats).build();
}

Example 4 with CoordinatorStats

use of io.druid.server.coordinator.CoordinatorStats in project druid by druid-io.

the class DruidCoordinatorRuleRunner method run.

@Override
public DruidCoordinatorRuntimeParams run(DruidCoordinatorRuntimeParams params) {
    replicatorThrottler.updateParams(coordinator.getDynamicConfigs().getReplicationThrottleLimit(), coordinator.getDynamicConfigs().getReplicantLifetime());
    CoordinatorStats stats = new CoordinatorStats();
    DruidCluster cluster = params.getDruidCluster();
    if (cluster.isEmpty()) {
        log.warn("Uh... I have no servers. Not assigning anything...");
        return params;
    }
    // find available segments which are not overshadowed by other segments in DB
    // only those would need to be loaded/dropped
    // anything overshadowed by served segments is dropped automatically by DruidCoordinatorCleanupOvershadowed
    Map<String, VersionedIntervalTimeline<String, DataSegment>> timelines = new HashMap<>();
    for (DataSegment segment : params.getAvailableSegments()) {
        VersionedIntervalTimeline<String, DataSegment> timeline = timelines.get(segment.getDataSource());
        if (timeline == null) {
            timeline = new VersionedIntervalTimeline<>(Comparators.comparable());
            timelines.put(segment.getDataSource(), timeline);
        }
        timeline.add(segment.getInterval(), segment.getVersion(), segment.getShardSpec().createChunk(segment));
    }
    Set<DataSegment> overshadowed = new HashSet<>();
    for (VersionedIntervalTimeline<String, DataSegment> timeline : timelines.values()) {
        for (TimelineObjectHolder<String, DataSegment> holder : timeline.findOvershadowed()) {
            for (DataSegment dataSegment : holder.getObject().payloads()) {
                overshadowed.add(dataSegment);
            }
        }
    }
    Set<DataSegment> nonOvershadowed = new HashSet<>();
    for (DataSegment dataSegment : params.getAvailableSegments()) {
        if (!overshadowed.contains(dataSegment)) {
            nonOvershadowed.add(dataSegment);
        }
    }
    for (String tier : cluster.getTierNames()) {
        replicatorThrottler.updateReplicationState(tier);
    }
    DruidCoordinatorRuntimeParams paramsWithReplicationManager = params.buildFromExistingWithoutAvailableSegments().withReplicationManager(replicatorThrottler).withAvailableSegments(nonOvershadowed).build();
    // Run through all matched rules for available segments
    DateTime now = new DateTime();
    MetadataRuleManager databaseRuleManager = paramsWithReplicationManager.getDatabaseRuleManager();
    final List<String> segmentsWithMissingRules = Lists.newArrayListWithCapacity(MAX_MISSING_RULES);
    int missingRules = 0;
    for (DataSegment segment : paramsWithReplicationManager.getAvailableSegments()) {
        List<Rule> rules = databaseRuleManager.getRulesWithDefault(segment.getDataSource());
        boolean foundMatchingRule = false;
        for (Rule rule : rules) {
            if (rule.appliesTo(segment, now)) {
                stats.accumulate(rule.run(coordinator, paramsWithReplicationManager, segment));
                foundMatchingRule = true;
                break;
            }
        }
        if (!foundMatchingRule) {
            if (segmentsWithMissingRules.size() < MAX_MISSING_RULES) {
                segmentsWithMissingRules.add(segment.getIdentifier());
            }
            missingRules++;
        }
    }
    if (!segmentsWithMissingRules.isEmpty()) {
        log.makeAlert("Unable to find matching rules!").addData("segmentsWithMissingRulesCount", missingRules).addData("segmentsWithMissingRules", segmentsWithMissingRules).emit();
    }
    return paramsWithReplicationManager.buildFromExistingWithoutAvailableSegments().withCoordinatorStats(stats).withAvailableSegments(params.getAvailableSegments()).build();
}

Example 5 with CoordinatorStats

use of io.druid.server.coordinator.CoordinatorStats in project druid by druid-io.

the class DropRule method run.

@Override
public CoordinatorStats run(DruidCoordinator coordinator, DruidCoordinatorRuntimeParams params, DataSegment segment) {
    CoordinatorStats stats = new CoordinatorStats();
    coordinator.removeSegment(segment);
    stats.addToGlobalStat("deletedCount", 1);
    return stats;
}