Examples with ExponentialBackoffRetry org.apache.curator.retry.ExponentialBackoffRetry used on opensource projects

Example 1 with ExponentialBackoffRetry

use of org.apache.curator.retry.ExponentialBackoffRetry in project druid by druid-io.

the class RemoteTaskRunnerFactoryTest method setUp.

@Before
public void setUp() throws Exception {
    TestUtils testUtils = new TestUtils();
    jsonMapper = testUtils.getTestObjectMapper();
    testingCluster = new TestingCluster(1);
    testingCluster.start();
    cf = CuratorFrameworkFactory.builder().connectString(testingCluster.getConnectString()).retryPolicy(new ExponentialBackoffRetry(1, 10)).compressionProvider(new PotentiallyGzippedCompressionProvider(false)).build();
    cf.start();
    cf.blockUntilConnected();
}

Example 2 with ExponentialBackoffRetry

use of org.apache.curator.retry.ExponentialBackoffRetry in project druid by druid-io.

the class WorkerTaskMonitorTest method setUp.

@Before
public void setUp() throws Exception {
    testingCluster = new TestingCluster(1);
    testingCluster.start();
    cf = CuratorFrameworkFactory.builder().connectString(testingCluster.getConnectString()).retryPolicy(new ExponentialBackoffRetry(1, 10)).compressionProvider(new PotentiallyGzippedCompressionProvider(false)).build();
    cf.start();
    cf.blockUntilConnected();
    cf.create().creatingParentsIfNeeded().forPath(basePath);
    worker = new Worker("worker", "localhost", 3, "0");
    workerCuratorCoordinator = new WorkerCuratorCoordinator(jsonMapper, new IndexerZkConfig(new ZkPathsConfig() {

        @Override
        public String getBase() {
            return basePath;
        }
    }, null, null, null, null, null), new TestRemoteTaskRunnerConfig(new Period("PT1S")), cf, worker);
    workerCuratorCoordinator.start();
    // Start a task monitor
    workerTaskMonitor = createTaskMonitor();
    TestTasks.registerSubtypes(jsonMapper);
    jsonMapper.registerSubtypes(new NamedType(TestRealtimeTask.class, "test_realtime"));
    workerTaskMonitor.start();
    task = TestTasks.immediateSuccess("test");
}

Example 3 with ExponentialBackoffRetry

use of org.apache.curator.retry.ExponentialBackoffRetry in project druid by druid-io.

the class WorkerResourceTest method setUp.

@Before
public void setUp() throws Exception {
    testingCluster = new TestingCluster(1);
    testingCluster.start();
    cf = CuratorFrameworkFactory.builder().connectString(testingCluster.getConnectString()).retryPolicy(new ExponentialBackoffRetry(1, 10)).compressionProvider(new PotentiallyGzippedCompressionProvider(false)).build();
    cf.start();
    cf.blockUntilConnected();
    cf.create().creatingParentsIfNeeded().forPath(basePath);
    worker = new Worker("host", "ip", 3, "v1");
    curatorCoordinator = new WorkerCuratorCoordinator(jsonMapper, new IndexerZkConfig(new ZkPathsConfig() {

        @Override
        public String getBase() {
            return basePath;
        }
    }, null, null, null, null, null), new RemoteTaskRunnerConfig(), cf, worker);
    curatorCoordinator.start();
    workerResource = new WorkerResource(worker, curatorCoordinator, null);
}

Example 4 with ExponentialBackoffRetry

use of org.apache.curator.retry.ExponentialBackoffRetry in project hive by apache.

the class HiveServer2 method addServerInstanceToZooKeeper.

/**
   * Adds a server instance to ZooKeeper as a znode.
   *
   * @param hiveConf
   * @throws Exception
   */
private void addServerInstanceToZooKeeper(HiveConf hiveConf) throws Exception {
    String zooKeeperEnsemble = ZooKeeperHiveHelper.getQuorumServers(hiveConf);
    String rootNamespace = hiveConf.getVar(HiveConf.ConfVars.HIVE_SERVER2_ZOOKEEPER_NAMESPACE);
    String instanceURI = getServerInstanceURI();
    setUpZooKeeperAuth(hiveConf);
    int sessionTimeout = (int) hiveConf.getTimeVar(HiveConf.ConfVars.HIVE_ZOOKEEPER_SESSION_TIMEOUT, TimeUnit.MILLISECONDS);
    int baseSleepTime = (int) hiveConf.getTimeVar(HiveConf.ConfVars.HIVE_ZOOKEEPER_CONNECTION_BASESLEEPTIME, TimeUnit.MILLISECONDS);
    int maxRetries = hiveConf.getIntVar(HiveConf.ConfVars.HIVE_ZOOKEEPER_CONNECTION_MAX_RETRIES);
    // Create a CuratorFramework instance to be used as the ZooKeeper client
    // Use the zooKeeperAclProvider to create appropriate ACLs
    zooKeeperClient = CuratorFrameworkFactory.builder().connectString(zooKeeperEnsemble).sessionTimeoutMs(sessionTimeout).aclProvider(zooKeeperAclProvider).retryPolicy(new ExponentialBackoffRetry(baseSleepTime, maxRetries)).build();
    zooKeeperClient.start();
    // Create the parent znodes recursively; ignore if the parent already exists.
    try {
        zooKeeperClient.create().creatingParentsIfNeeded().withMode(CreateMode.PERSISTENT).forPath(ZooKeeperHiveHelper.ZOOKEEPER_PATH_SEPARATOR + rootNamespace);
        LOG.info("Created the root name space: " + rootNamespace + " on ZooKeeper for HiveServer2");
    } catch (KeeperException e) {
        if (e.code() != KeeperException.Code.NODEEXISTS) {
            LOG.error("Unable to create HiveServer2 namespace: " + rootNamespace + " on ZooKeeper", e);
            throw e;
        }
    }
    // Znode name: serverUri=host:port;version=versionInfo;sequence=sequenceNumber
    try {
        String pathPrefix = ZooKeeperHiveHelper.ZOOKEEPER_PATH_SEPARATOR + rootNamespace + ZooKeeperHiveHelper.ZOOKEEPER_PATH_SEPARATOR + "serverUri=" + instanceURI + ";" + "version=" + HiveVersionInfo.getVersion() + ";" + "sequence=";
        String znodeData = "";
        if (hiveConf.getBoolVar(HiveConf.ConfVars.HIVE_SERVER2_ZOOKEEPER_PUBLISH_CONFIGS)) {
            // HiveServer2 configs that this instance will publish to ZooKeeper,
            // so that the clients can read these and configure themselves properly.
            Map<String, String> confsToPublish = new HashMap<String, String>();
            addConfsToPublish(hiveConf, confsToPublish);
            // Publish configs for this instance as the data on the node
            znodeData = Joiner.on(';').withKeyValueSeparator("=").join(confsToPublish);
        } else {
            znodeData = instanceURI;
        }
        byte[] znodeDataUTF8 = znodeData.getBytes(Charset.forName("UTF-8"));
        znode = new PersistentEphemeralNode(zooKeeperClient, PersistentEphemeralNode.Mode.EPHEMERAL_SEQUENTIAL, pathPrefix, znodeDataUTF8);
        znode.start();
        // We'll wait for 120s for node creation
        long znodeCreationTimeout = 120;
        if (!znode.waitForInitialCreate(znodeCreationTimeout, TimeUnit.SECONDS)) {
            throw new Exception("Max znode creation wait time: " + znodeCreationTimeout + "s exhausted");
        }
        setDeregisteredWithZooKeeper(false);
        znodePath = znode.getActualPath();
        // Set a watch on the znode
        if (zooKeeperClient.checkExists().usingWatcher(new DeRegisterWatcher()).forPath(znodePath) == null) {
            // No node exists, throw exception
            throw new Exception("Unable to create znode for this HiveServer2 instance on ZooKeeper.");
        }
        LOG.info("Created a znode on ZooKeeper for HiveServer2 uri: " + instanceURI);
    } catch (Exception e) {
        LOG.error("Unable to create a znode for this server instance", e);
        if (znode != null) {
            znode.close();
        }
        throw (e);
    }
}

Example 5 with ExponentialBackoffRetry

use of org.apache.curator.retry.ExponentialBackoffRetry in project hive by apache.

the class ZooKeeperTokenStore method getSession.

private CuratorFramework getSession() {
    if (zkSession == null || zkSession.getState() == CuratorFrameworkState.STOPPED) {
        synchronized (this) {
            if (zkSession == null || zkSession.getState() == CuratorFrameworkState.STOPPED) {
                zkSession = CuratorFrameworkFactory.builder().connectString(zkConnectString).connectionTimeoutMs(connectTimeoutMillis).aclProvider(aclDefaultProvider).retryPolicy(new ExponentialBackoffRetry(1000, 3)).build();
                zkSession.start();
            }
        }
    }
    return zkSession;
}