Examples with ZNRecordSerializer org.apache.helix.manager.zk.ZNRecordSerializer used on opensource projects

Example 1 with ZNRecordSerializer

use of org.apache.helix.manager.zk.ZNRecordSerializer in project pinot by linkedin.

the class HelixHelper method updateIdealState.

/**
   * Updates the ideal state, retrying if necessary in case of concurrent updates to the ideal state.
   *
   * @param helixManager The HelixManager used to interact with the Helix cluster
   * @param resourceName The resource for which to update the ideal state
   * @param updater A function that returns an updated ideal state given an input ideal state
   */
public static void updateIdealState(final HelixManager helixManager, final String resourceName, final Function<IdealState, IdealState> updater, RetryPolicy policy) {
    boolean successful = policy.attempt(new Callable<Boolean>() {

        @Override
        public Boolean call() {
            HelixDataAccessor dataAccessor = helixManager.getHelixDataAccessor();
            PropertyKey propertyKey = dataAccessor.keyBuilder().idealStates(resourceName);
            // Create an updated version of the ideal state
            IdealState idealState = dataAccessor.getProperty(propertyKey);
            PropertyKey key = dataAccessor.keyBuilder().idealStates(resourceName);
            String path = key.getPath();
            // Make a copy of the the idealState above to pass it to the updater, instead of querying again,
            // as the state my change between the queries.
            ZNRecordSerializer znRecordSerializer = new ZNRecordSerializer();
            IdealState idealStateCopy = new IdealState((ZNRecord) znRecordSerializer.deserialize(znRecordSerializer.serialize(idealState.getRecord())));
            IdealState updatedIdealState;
            try {
                updatedIdealState = updater.apply(idealStateCopy);
            } catch (Exception e) {
                LOGGER.error("Caught exception while updating ideal state", e);
                return false;
            }
            // If there are changes to apply, apply them
            if (!EqualityUtils.isEqual(idealState, updatedIdealState) && updatedIdealState != null) {
                BaseDataAccessor<ZNRecord> baseDataAccessor = dataAccessor.getBaseDataAccessor();
                boolean success;
                // If the ideal state is large enough, enable compression
                if (MAX_PARTITION_COUNT_IN_UNCOMPRESSED_IDEAL_STATE < updatedIdealState.getPartitionSet().size()) {
                    updatedIdealState.getRecord().setBooleanField("enableCompression", true);
                }
                try {
                    success = baseDataAccessor.set(path, updatedIdealState.getRecord(), idealState.getRecord().getVersion(), AccessOption.PERSISTENT);
                } catch (Exception e) {
                    boolean idealStateIsCompressed = updatedIdealState.getRecord().getBooleanField("enableCompression", false);
                    LOGGER.warn("Caught exception while updating ideal state for resource {} (compressed={}), retrying.", resourceName, idealStateIsCompressed, e);
                    return false;
                }
                if (success) {
                    return true;
                } else {
                    LOGGER.warn("Failed to update ideal state for resource {}, retrying.", resourceName);
                    return false;
                }
            } else {
                LOGGER.warn("Idempotent or null ideal state update for resource {}, skipping update.", resourceName);
                return true;
            }
        }
    });
    if (!successful) {
        throw new RuntimeException("Failed to update ideal state for resource " + resourceName);
    }
}

Example 2 with ZNRecordSerializer

use of org.apache.helix.manager.zk.ZNRecordSerializer in project pinot by linkedin.

the class HelixSetupUtils method createHelixClusterIfNeeded.

public static void createHelixClusterIfNeeded(String helixClusterName, String zkPath, boolean isUpdateStateModel) {
    final HelixAdmin admin = new ZKHelixAdmin(zkPath);
    final String segmentStateModelName = PinotHelixSegmentOnlineOfflineStateModelGenerator.PINOT_SEGMENT_ONLINE_OFFLINE_STATE_MODEL;
    if (admin.getClusters().contains(helixClusterName)) {
        LOGGER.info("cluster already exists ********************************************* ");
        if (isUpdateStateModel) {
            final StateModelDefinition curStateModelDef = admin.getStateModelDef(helixClusterName, segmentStateModelName);
            List<String> states = curStateModelDef.getStatesPriorityList();
            if (states.contains(PinotHelixSegmentOnlineOfflineStateModelGenerator.CONSUMING_STATE)) {
                LOGGER.info("State model {} already updated to contain CONSUMING state", segmentStateModelName);
                return;
            } else {
                LOGGER.info("Updating {} to add states for low level kafka consumers", segmentStateModelName);
                StateModelDefinition newStateModelDef = PinotHelixSegmentOnlineOfflineStateModelGenerator.generatePinotStateModelDefinition();
                ZkClient zkClient = new ZkClient(zkPath);
                zkClient.waitUntilConnected(20, TimeUnit.SECONDS);
                zkClient.setZkSerializer(new ZNRecordSerializer());
                HelixDataAccessor accessor = new ZKHelixDataAccessor(helixClusterName, new ZkBaseDataAccessor<ZNRecord>(zkClient));
                PropertyKey.Builder keyBuilder = accessor.keyBuilder();
                accessor.setProperty(keyBuilder.stateModelDef(segmentStateModelName), newStateModelDef);
                LOGGER.info("Completed updating statemodel {}", segmentStateModelName);
                zkClient.close();
            }
        }
        return;
    }
    LOGGER.info("Creating a new cluster, as the helix cluster : " + helixClusterName + " was not found ********************************************* ");
    admin.addCluster(helixClusterName, false);
    LOGGER.info("Enable auto join.");
    final HelixConfigScope scope = new HelixConfigScopeBuilder(ConfigScopeProperty.CLUSTER).forCluster(helixClusterName).build();
    final Map<String, String> props = new HashMap<String, String>();
    props.put(ZKHelixManager.ALLOW_PARTICIPANT_AUTO_JOIN, String.valueOf(true));
    //we need only one segment to be loaded at a time
    props.put(MessageType.STATE_TRANSITION + "." + HelixTaskExecutor.MAX_THREADS, String.valueOf(1));
    admin.setConfig(scope, props);
    LOGGER.info("Adding state model {} (with CONSUMED state) generated using {} **********************************************", segmentStateModelName, PinotHelixSegmentOnlineOfflineStateModelGenerator.class.toString());
    // If this is a fresh cluster we are creating, then the cluster will see the CONSUMING state in the
    // state model. But then the servers will never be asked to go to that STATE (whether they have the code
    // to handle it or not) unil we complete the feature using low-level kafka consumers and turn the feature on.
    admin.addStateModelDef(helixClusterName, segmentStateModelName, PinotHelixSegmentOnlineOfflineStateModelGenerator.generatePinotStateModelDefinition());
    LOGGER.info("Adding state model definition named : " + PinotHelixBrokerResourceOnlineOfflineStateModelGenerator.PINOT_BROKER_RESOURCE_ONLINE_OFFLINE_STATE_MODEL + " generated using : " + PinotHelixBrokerResourceOnlineOfflineStateModelGenerator.class.toString() + " ********************************************** ");
    admin.addStateModelDef(helixClusterName, PinotHelixBrokerResourceOnlineOfflineStateModelGenerator.PINOT_BROKER_RESOURCE_ONLINE_OFFLINE_STATE_MODEL, PinotHelixBrokerResourceOnlineOfflineStateModelGenerator.generatePinotStateModelDefinition());
    LOGGER.info("Adding empty ideal state for Broker!");
    HelixHelper.updateResourceConfigsFor(new HashMap<String, String>(), CommonConstants.Helix.BROKER_RESOURCE_INSTANCE, helixClusterName, admin);
    IdealState idealState = PinotTableIdealStateBuilder.buildEmptyIdealStateForBrokerResource(admin, helixClusterName);
    admin.setResourceIdealState(helixClusterName, CommonConstants.Helix.BROKER_RESOURCE_INSTANCE, idealState);
    initPropertyStorePath(helixClusterName, zkPath);
    LOGGER.info("New Cluster setup completed... ********************************************** ");
}

Example 3 with ZNRecordSerializer

use of org.apache.helix.manager.zk.ZNRecordSerializer in project pinot by linkedin.

the class HelixSetupUtils method initPropertyStorePath.

private static void initPropertyStorePath(String helixClusterName, String zkPath) {
    String propertyStorePath = PropertyPathConfig.getPath(PropertyType.PROPERTYSTORE, helixClusterName);
    ZkHelixPropertyStore<ZNRecord> propertyStore = new ZkHelixPropertyStore<ZNRecord>(zkPath, new ZNRecordSerializer(), propertyStorePath);
    propertyStore.create("/CONFIGS", new ZNRecord(""), AccessOption.PERSISTENT);
    propertyStore.create("/CONFIGS/CLUSTER", new ZNRecord(""), AccessOption.PERSISTENT);
    propertyStore.create("/CONFIGS/TABLE", new ZNRecord(""), AccessOption.PERSISTENT);
    propertyStore.create("/CONFIGS/INSTANCE", new ZNRecord(""), AccessOption.PERSISTENT);
    propertyStore.create("/SCHEMAS", new ZNRecord(""), AccessOption.PERSISTENT);
    propertyStore.create("/SEGMENTS", new ZNRecord(""), AccessOption.PERSISTENT);
}

Example 4 with ZNRecordSerializer

use of org.apache.helix.manager.zk.ZNRecordSerializer in project pinot by linkedin.

the class BenchmarkQueryEngine method startPinot.

@Setup
public void startPinot() throws Exception {
    System.out.println("Using table name " + TABLE_NAME);
    System.out.println("Using data directory " + DATA_DIRECTORY);
    System.out.println("Starting pinot");
    PerfBenchmarkDriverConf conf = new PerfBenchmarkDriverConf();
    conf.setStartBroker(true);
    conf.setStartController(true);
    conf.setStartServer(true);
    conf.setStartZookeeper(true);
    conf.setUploadIndexes(false);
    conf.setRunQueries(false);
    conf.setServerInstanceSegmentTarDir(null);
    conf.setServerInstanceDataDir(DATA_DIRECTORY);
    conf.setConfigureResources(false);
    _perfBenchmarkDriver = new PerfBenchmarkDriver(conf);
    _perfBenchmarkDriver.run();
    Set<String> tables = new HashSet<String>();
    File[] segments = new File(DATA_DIRECTORY, TABLE_NAME).listFiles();
    for (File segmentDir : segments) {
        SegmentMetadataImpl segmentMetadata = new SegmentMetadataImpl(segmentDir);
        if (!tables.contains(segmentMetadata.getTableName())) {
            _perfBenchmarkDriver.configureTable(segmentMetadata.getTableName());
            tables.add(segmentMetadata.getTableName());
        }
        System.out.println("Adding segment " + segmentDir.getAbsolutePath());
        _perfBenchmarkDriver.addSegment(segmentMetadata);
    }
    ZkClient client = new ZkClient("localhost:2191", 10000, 10000, new ZNRecordSerializer());
    ZNRecord record = client.readData("/PinotPerfTestCluster/EXTERNALVIEW/" + TABLE_NAME);
    while (true) {
        System.out.println("record = " + record);
        Uninterruptibles.sleepUninterruptibly(10, TimeUnit.SECONDS);
        int onlineSegmentCount = 0;
        for (Map<String, String> instancesAndStates : record.getMapFields().values()) {
            for (String state : instancesAndStates.values()) {
                if (state.equals("ONLINE")) {
                    onlineSegmentCount++;
                    break;
                }
            }
        }
        System.out.println(onlineSegmentCount + " segments online out of " + segments.length);
        if (onlineSegmentCount == segments.length) {
            break;
        }
        record = client.readData("/PinotPerfTestCluster/EXTERNALVIEW/" + TABLE_NAME);
    }
    ranOnce = false;
    System.out.println(_perfBenchmarkDriver.postQuery(QUERY_PATTERNS[queryPattern], optimizationFlags).toString(2));
}

Example 5 with ZNRecordSerializer

use of org.apache.helix.manager.zk.ZNRecordSerializer in project pinot by linkedin.

the class LLCRealtimeClusterIntegrationTest method testSegmentFlushSize.

@Test
public void testSegmentFlushSize() {
    ZkClient zkClient = new ZkClient(ZkStarter.DEFAULT_ZK_STR, 10000);
    zkClient.setZkSerializer(new ZNRecordSerializer());
    String zkPath = "/LLCRealtimeClusterIntegrationTest/PROPERTYSTORE/SEGMENTS/mytable_REALTIME";
    List<String> segmentNames = zkClient.getChildren(zkPath);
    for (String segmentName : segmentNames) {
        ZNRecord znRecord = zkClient.<ZNRecord>readData(zkPath + "/" + segmentName);
        Assert.assertEquals(znRecord.getSimpleField(CommonConstants.Segment.FLUSH_THRESHOLD_SIZE), Integer.toString(ROW_COUNT_FOR_REALTIME_SEGMENT_FLUSH / KAFKA_PARTITION_COUNT), "Segment " + segmentName + " does not have the expected flush size");
    }
    zkClient.close();
}