Examples with MasterProcedureEnv org.apache.hadoop.hbase.master.procedure.MasterProcedureEnv used on opensource projects

Example 1 with MasterProcedureEnv

use of org.apache.hadoop.hbase.master.procedure.MasterProcedureEnv in project hbase by apache.

the class TestAccessController method testAbortProcedure.

@Test
public void testAbortProcedure() throws Exception {
    final TableName tableName = TableName.valueOf(name.getMethodName());
    final ProcedureExecutor<MasterProcedureEnv> procExec = TEST_UTIL.getHBaseCluster().getMaster().getMasterProcedureExecutor();
    Procedure proc = new TestTableDDLProcedure(procExec.getEnvironment(), tableName);
    proc.setOwner(USER_OWNER);
    final long procId = procExec.submitProcedure(proc);
    AccessTestAction abortProcedureAction = new AccessTestAction() {

        @Override
        public Object run() throws Exception {
            ACCESS_CONTROLLER.preAbortProcedure(ObserverContext.createAndPrepare(CP_ENV, null), procExec, procId);
            return null;
        }
    };
    verifyAllowed(abortProcedureAction, SUPERUSER, USER_ADMIN, USER_GROUP_ADMIN);
    verifyAllowed(abortProcedureAction, USER_OWNER);
    verifyDenied(abortProcedureAction, USER_RW, USER_RO, USER_NONE, USER_GROUP_READ, USER_GROUP_WRITE);
}

Example 2 with MasterProcedureEnv

use of org.apache.hadoop.hbase.master.procedure.MasterProcedureEnv in project hbase by apache.

the class ServerManager method expireServer.

/*
   * Expire the passed server.  Add it to list of dead servers and queue a
   * shutdown processing.
   */
public synchronized void expireServer(final ServerName serverName) {
    if (serverName.equals(master.getServerName())) {
        if (!(master.isAborted() || master.isStopped())) {
            master.stop("We lost our znode?");
        }
        return;
    }
    if (!master.isServerCrashProcessingEnabled()) {
        LOG.info("Master doesn't enable ServerShutdownHandler during initialization, " + "delay expiring server " + serverName);
        this.queuedDeadServers.add(serverName);
        return;
    }
    if (this.deadservers.isDeadServer(serverName)) {
        // TODO: Can this happen?  It shouldn't be online in this case?
        LOG.warn("Expiration of " + serverName + " but server shutdown already in progress");
        return;
    }
    moveFromOnlineToDeadServers(serverName);
    // process as a dead server
    if (this.clusterShutdown) {
        LOG.info("Cluster shutdown set; " + serverName + " expired; onlineServers=" + this.onlineServers.size());
        if (this.onlineServers.isEmpty()) {
            master.stop("Cluster shutdown set; onlineServer=0");
        }
        return;
    }
    boolean carryingMeta = master.getAssignmentManager().isCarryingMeta(serverName);
    ProcedureExecutor<MasterProcedureEnv> procExec = this.master.getMasterProcedureExecutor();
    procExec.submitProcedure(new ServerCrashProcedure(procExec.getEnvironment(), serverName, true, carryingMeta));
    LOG.debug("Added=" + serverName + " to dead servers, submitted shutdown handler to be executed meta=" + carryingMeta);
    // Tell our listeners that a server was removed
    if (!this.listeners.isEmpty()) {
        for (ServerListener listener : this.listeners) {
            listener.serverRemoved(serverName);
        }
    }
}

Example 3 with MasterProcedureEnv

use of org.apache.hadoop.hbase.master.procedure.MasterProcedureEnv in project hbase by apache.

the class AssignmentManager method submitServerCrash.

/**
 * Usually run by the Master in reaction to server crash during normal processing.
 * Can also be invoked via external RPC to effect repair; in the latter case,
 * the 'force' flag is set so we push through the SCP though context may indicate
 * already-running-SCP (An old SCP may have exited abnormally, or damaged cluster
 * may still have references in hbase:meta to 'Unknown Servers' -- servers that
 * are not online or in dead servers list, etc.)
 * @param force Set if the request came in externally over RPC (via hbck2). Force means
 *              run the SCP even if it seems as though there might be an outstanding
 *              SCP running.
 * @return pid of scheduled SCP or {@link Procedure#NO_PROC_ID} if none scheduled.
 */
public long submitServerCrash(ServerName serverName, boolean shouldSplitWal, boolean force) {
    // May be an 'Unknown Server' so handle case where serverNode is null.
    ServerStateNode serverNode = regionStates.getServerNode(serverName);
    // Remove the in-memory rsReports result
    synchronized (rsReports) {
        rsReports.remove(serverName);
    }
    // sure that, the region list fetched by SCP will not be changed any more.
    if (serverNode != null) {
        serverNode.writeLock().lock();
    }
    boolean carryingMeta;
    long pid;
    try {
        ProcedureExecutor<MasterProcedureEnv> procExec = this.master.getMasterProcedureExecutor();
        carryingMeta = isCarryingMeta(serverName);
        if (!force && serverNode != null && !serverNode.isInState(ServerState.ONLINE)) {
            LOG.info("Skip adding ServerCrashProcedure for {} (meta={}) -- running?", serverNode, carryingMeta);
            return Procedure.NO_PROC_ID;
        } else {
            MasterProcedureEnv mpe = procExec.getEnvironment();
            // If serverNode == null, then 'Unknown Server'. Schedule HBCKSCP instead.
            // HBCKSCP scours Master in-memory state AND hbase;meta for references to
            // serverName just-in-case. An SCP that is scheduled when the server is
            // 'Unknown' probably originated externally with HBCK2 fix-it tool.
            ServerState oldState = null;
            if (serverNode != null) {
                oldState = serverNode.getState();
                serverNode.setState(ServerState.CRASHED);
            }
            if (force) {
                pid = procExec.submitProcedure(new HBCKServerCrashProcedure(mpe, serverName, shouldSplitWal, carryingMeta));
            } else {
                pid = procExec.submitProcedure(new ServerCrashProcedure(mpe, serverName, shouldSplitWal, carryingMeta));
            }
            LOG.info("Scheduled ServerCrashProcedure pid={} for {} (carryingMeta={}){}.", pid, serverName, carryingMeta, serverNode == null ? "" : " " + serverNode.toString() + ", oldState=" + oldState);
        }
    } finally {
        if (serverNode != null) {
            serverNode.writeLock().unlock();
        }
    }
    return pid;
}

Example 4 with MasterProcedureEnv

use of org.apache.hadoop.hbase.master.procedure.MasterProcedureEnv in project hbase by apache.

the class HMaster method finishActiveMasterInitialization.

/**
 * Finish initialization of HMaster after becoming the primary master.
 * <p/>
 * The startup order is a bit complicated but very important, do not change it unless you know
 * what you are doing.
 * <ol>
 * <li>Initialize file system based components - file system manager, wal manager, table
 * descriptors, etc</li>
 * <li>Publish cluster id</li>
 * <li>Here comes the most complicated part - initialize server manager, assignment manager and
 * region server tracker
 * <ol type='i'>
 * <li>Create server manager</li>
 * <li>Create master local region</li>
 * <li>Create procedure executor, load the procedures, but do not start workers. We will start it
 * later after we finish scheduling SCPs to avoid scheduling duplicated SCPs for the same
 * server</li>
 * <li>Create assignment manager and start it, load the meta region state, but do not load data
 * from meta region</li>
 * <li>Start region server tracker, construct the online servers set and find out dead servers and
 * schedule SCP for them. The online servers will be constructed by scanning zk, and we will also
 * scan the wal directory to find out possible live region servers, and the differences between
 * these two sets are the dead servers</li>
 * </ol>
 * </li>
 * <li>If this is a new deploy, schedule a InitMetaProcedure to initialize meta</li>
 * <li>Start necessary service threads - balancer, catalog janitor, executor services, and also
 * the procedure executor, etc. Notice that the balancer must be created first as assignment
 * manager may use it when assigning regions.</li>
 * <li>Wait for meta to be initialized if necessary, start table state manager.</li>
 * <li>Wait for enough region servers to check-in</li>
 * <li>Let assignment manager load data from meta and construct region states</li>
 * <li>Start all other things such as chore services, etc</li>
 * </ol>
 * <p/>
 * Notice that now we will not schedule a special procedure to make meta online(unless the first
 * time where meta has not been created yet), we will rely on SCP to bring meta online.
 */
private void finishActiveMasterInitialization(MonitoredTask status) throws IOException, InterruptedException, KeeperException, ReplicationException {
    /*
     * We are active master now... go initialize components we need to run.
     */
    status.setStatus("Initializing Master file system");
    this.masterActiveTime = EnvironmentEdgeManager.currentTime();
    // TODO: Do this using Dependency Injection, using PicoContainer, Guice or Spring.
    // always initialize the MemStoreLAB as we use a region to store data in master now, see
    // localStore.
    initializeMemStoreChunkCreator(null);
    this.fileSystemManager = new MasterFileSystem(conf);
    this.walManager = new MasterWalManager(this);
    // warm-up HTDs cache on master initialization
    if (preLoadTableDescriptors) {
        status.setStatus("Pre-loading table descriptors");
        this.tableDescriptors.getAll();
    }
    // Publish cluster ID; set it in Master too. The superclass RegionServer does this later but
    // only after it has checked in with the Master. At least a few tests ask Master for clusterId
    // before it has called its run method and before RegionServer has done the reportForDuty.
    ClusterId clusterId = fileSystemManager.getClusterId();
    status.setStatus("Publishing Cluster ID " + clusterId + " in ZooKeeper");
    ZKClusterId.setClusterId(this.zooKeeper, fileSystemManager.getClusterId());
    this.clusterId = clusterId.toString();
    // hbase.write.hbck1.lock.file to false.
    if (this.conf.getBoolean("hbase.write.hbck1.lock.file", true)) {
        Pair<Path, FSDataOutputStream> result = null;
        try {
            result = HBaseFsck.checkAndMarkRunningHbck(this.conf, HBaseFsck.createLockRetryCounterFactory(this.conf).create());
        } finally {
            if (result != null) {
                Closeables.close(result.getSecond(), true);
            }
        }
    }
    status.setStatus("Initialize ServerManager and schedule SCP for crash servers");
    // The below two managers must be created before loading procedures, as they will be used during
    // loading.
    this.serverManager = createServerManager(this);
    this.syncReplicationReplayWALManager = new SyncReplicationReplayWALManager(this);
    if (!conf.getBoolean(HBASE_SPLIT_WAL_COORDINATED_BY_ZK, DEFAULT_HBASE_SPLIT_COORDINATED_BY_ZK)) {
        this.splitWALManager = new SplitWALManager(this);
    }
    // initialize master local region
    masterRegion = MasterRegionFactory.create(this);
    tryMigrateMetaLocationsFromZooKeeper();
    createProcedureExecutor();
    Map<Class<?>, List<Procedure<MasterProcedureEnv>>> procsByType = procedureExecutor.getActiveProceduresNoCopy().stream().collect(Collectors.groupingBy(p -> p.getClass()));
    // Create Assignment Manager
    this.assignmentManager = createAssignmentManager(this, masterRegion);
    this.assignmentManager.start();
    // TODO: TRSP can perform as the sub procedure for other procedures, so even if it is marked as
    // completed, it could still be in the procedure list. This is a bit strange but is another
    // story, need to verify the implementation for ProcedureExecutor and ProcedureStore.
    List<TransitRegionStateProcedure> ritList = procsByType.getOrDefault(TransitRegionStateProcedure.class, Collections.emptyList()).stream().filter(p -> !p.isFinished()).map(p -> (TransitRegionStateProcedure) p).collect(Collectors.toList());
    this.assignmentManager.setupRIT(ritList);
    // Start RegionServerTracker with listing of servers found with exiting SCPs -- these should
    // be registered in the deadServers set -- and with the list of servernames out on the
    // filesystem that COULD BE 'alive' (we'll schedule SCPs for each and let SCP figure it out).
    // We also pass dirs that are already 'splitting'... so we can do some checks down in tracker.
    // TODO: Generate the splitting and live Set in one pass instead of two as we currently do.
    this.regionServerTracker.upgrade(procsByType.getOrDefault(ServerCrashProcedure.class, Collections.emptyList()).stream().map(p -> (ServerCrashProcedure) p).map(p -> p.getServerName()).collect(Collectors.toSet()), walManager.getLiveServersFromWALDir(), walManager.getSplittingServersFromWALDir());
    // This manager must be accessed AFTER hbase:meta is confirmed on line..
    this.tableStateManager = new TableStateManager(this);
    status.setStatus("Initializing ZK system trackers");
    initializeZKBasedSystemTrackers();
    status.setStatus("Loading last flushed sequence id of regions");
    try {
        this.serverManager.loadLastFlushedSequenceIds();
    } catch (IOException e) {
        LOG.info("Failed to load last flushed sequence id of regions" + " from file system", e);
    }
    // Set ourselves as active Master now our claim has succeeded up in zk.
    this.activeMaster = true;
    // Start the Zombie master detector after setting master as active, see HBASE-21535
    Thread zombieDetector = new Thread(new MasterInitializationMonitor(this), "ActiveMasterInitializationMonitor-" + EnvironmentEdgeManager.currentTime());
    zombieDetector.setDaemon(true);
    zombieDetector.start();
    if (!maintenanceMode) {
        // default with quota support, avoiding if user specifically asks to not load this Observer.
        if (QuotaUtil.isQuotaEnabled(conf)) {
            updateConfigurationForQuotasObserver(conf);
        }
        // initialize master side coprocessors before we start handling requests
        status.setStatus("Initializing master coprocessors");
        this.cpHost = new MasterCoprocessorHost(this, this.conf);
    } else {
        // start an in process region server for carrying system regions
        maintenanceRegionServer = JVMClusterUtil.createRegionServerThread(getConfiguration(), HRegionServer.class, 0);
        maintenanceRegionServer.start();
    }
    // Checking if meta needs initializing.
    status.setStatus("Initializing meta table if this is a new deploy");
    InitMetaProcedure initMetaProc = null;
    // Print out state of hbase:meta on startup; helps debugging.
    if (!this.assignmentManager.getRegionStates().hasTableRegionStates(TableName.META_TABLE_NAME)) {
        Optional<InitMetaProcedure> optProc = procedureExecutor.getProcedures().stream().filter(p -> p instanceof InitMetaProcedure).map(o -> (InitMetaProcedure) o).findAny();
        initMetaProc = optProc.orElseGet(() -> {
            // schedule an init meta procedure if meta has not been deployed yet
            InitMetaProcedure temp = new InitMetaProcedure();
            procedureExecutor.submitProcedure(temp);
            return temp;
        });
    }
    // initialize load balancer
    this.balancer.setMasterServices(this);
    this.balancer.initialize();
    this.balancer.updateClusterMetrics(getClusterMetricsWithoutCoprocessor());
    // start up all service threads.
    status.setStatus("Initializing master service threads");
    startServiceThreads();
    // wait meta to be initialized after we start procedure executor
    if (initMetaProc != null) {
        initMetaProc.await();
    }
    // Wake up this server to check in
    sleeper.skipSleepCycle();
    // Wait for region servers to report in.
    // With this as part of master initialization, it precludes our being able to start a single
    // server that is both Master and RegionServer. Needs more thought. TODO.
    String statusStr = "Wait for region servers to report in";
    status.setStatus(statusStr);
    LOG.info(Objects.toString(status));
    waitForRegionServers(status);
    // Check if master is shutting down because issue initializing regionservers or balancer.
    if (isStopped()) {
        return;
    }
    status.setStatus("Starting assignment manager");
    // available. That's what waitForMetaOnline does.
    if (!waitForMetaOnline()) {
        return;
    }
    TableDescriptor metaDescriptor = tableDescriptors.get(TableName.META_TABLE_NAME);
    final ColumnFamilyDescriptor tableFamilyDesc = metaDescriptor.getColumnFamily(HConstants.TABLE_FAMILY);
    final ColumnFamilyDescriptor replBarrierFamilyDesc = metaDescriptor.getColumnFamily(HConstants.REPLICATION_BARRIER_FAMILY);
    this.assignmentManager.joinCluster();
    // The below depends on hbase:meta being online.
    this.assignmentManager.processOfflineRegions();
    // this must be called after the above processOfflineRegions to prevent race
    this.assignmentManager.wakeMetaLoadedEvent();
    // first.
    if (conf.get(HConstants.META_REPLICAS_NUM) != null) {
        int replicasNumInConf = conf.getInt(HConstants.META_REPLICAS_NUM, HConstants.DEFAULT_META_REPLICA_NUM);
        TableDescriptor metaDesc = tableDescriptors.get(TableName.META_TABLE_NAME);
        if (metaDesc.getRegionReplication() != replicasNumInConf) {
            // it is possible that we already have some replicas before upgrading, so we must set the
            // region replication number in meta TableDescriptor directly first, without creating a
            // ModifyTableProcedure, otherwise it may cause a double assign for the meta replicas.
            int existingReplicasCount = assignmentManager.getRegionStates().getRegionsOfTable(TableName.META_TABLE_NAME).size();
            if (existingReplicasCount > metaDesc.getRegionReplication()) {
                LOG.info("Update replica count of hbase:meta from {}(in TableDescriptor)" + " to {}(existing ZNodes)", metaDesc.getRegionReplication(), existingReplicasCount);
                metaDesc = TableDescriptorBuilder.newBuilder(metaDesc).setRegionReplication(existingReplicasCount).build();
                tableDescriptors.update(metaDesc);
            }
            // check again, and issue a ModifyTableProcedure if needed
            if (metaDesc.getRegionReplication() != replicasNumInConf) {
                LOG.info("The {} config is {} while the replica count in TableDescriptor is {}" + " for hbase:meta, altering...", HConstants.META_REPLICAS_NUM, replicasNumInConf, metaDesc.getRegionReplication());
                procedureExecutor.submitProcedure(new ModifyTableProcedure(procedureExecutor.getEnvironment(), TableDescriptorBuilder.newBuilder(metaDesc).setRegionReplication(replicasNumInConf).build(), null, metaDesc, false));
            }
        }
    }
    // Initialize after meta is up as below scans meta
    FavoredNodesManager fnm = getFavoredNodesManager();
    if (fnm != null) {
        fnm.initializeFromMeta();
    }
    // set cluster status again after user regions are assigned
    this.balancer.updateClusterMetrics(getClusterMetricsWithoutCoprocessor());
    // Start balancer and meta catalog janitor after meta and regions have been assigned.
    status.setStatus("Starting balancer and catalog janitor");
    this.clusterStatusChore = new ClusterStatusChore(this, balancer);
    getChoreService().scheduleChore(clusterStatusChore);
    this.balancerChore = new BalancerChore(this);
    if (!disableBalancerChoreForTest) {
        getChoreService().scheduleChore(balancerChore);
    }
    if (regionNormalizerManager != null) {
        getChoreService().scheduleChore(regionNormalizerManager.getRegionNormalizerChore());
    }
    this.catalogJanitorChore = new CatalogJanitor(this);
    getChoreService().scheduleChore(catalogJanitorChore);
    this.hbckChore = new HbckChore(this);
    getChoreService().scheduleChore(hbckChore);
    this.serverManager.startChore();
    // Only for rolling upgrade, where we need to migrate the data in namespace table to meta table.
    if (!waitForNamespaceOnline()) {
        return;
    }
    status.setStatus("Starting cluster schema service");
    try {
        initClusterSchemaService();
    } catch (IllegalStateException e) {
        if (e.getCause() != null && e.getCause() instanceof NoSuchColumnFamilyException && tableFamilyDesc == null && replBarrierFamilyDesc == null) {
            LOG.info("ClusterSchema service could not be initialized. This is " + "expected during HBase 1 to 2 upgrade", e);
        } else {
            throw e;
        }
    }
    if (this.cpHost != null) {
        try {
            this.cpHost.preMasterInitialization();
        } catch (IOException e) {
            LOG.error("Coprocessor preMasterInitialization() hook failed", e);
        }
    }
    status.markComplete("Initialization successful");
    LOG.info(String.format("Master has completed initialization %.3fsec", (EnvironmentEdgeManager.currentTime() - masterActiveTime) / 1000.0f));
    this.masterFinishedInitializationTime = EnvironmentEdgeManager.currentTime();
    configurationManager.registerObserver(this.balancer);
    configurationManager.registerObserver(this.hfileCleanerPool);
    configurationManager.registerObserver(this.logCleanerPool);
    configurationManager.registerObserver(this.hfileCleaner);
    configurationManager.registerObserver(this.logCleaner);
    configurationManager.registerObserver(this.regionsRecoveryConfigManager);
    // Set master as 'initialized'.
    setInitialized(true);
    if (tableFamilyDesc == null && replBarrierFamilyDesc == null) {
        // create missing CFs in meta table after master is set to 'initialized'.
        createMissingCFsInMetaDuringUpgrade(metaDescriptor);
        // services will be started during master init phase.
        throw new PleaseRestartMasterException("Aborting active master after missing" + " CFs are successfully added in meta. Subsequent active master " + "initialization should be uninterrupted");
    }
    if (maintenanceMode) {
        LOG.info("Detected repair mode, skipping final initialization steps.");
        return;
    }
    assignmentManager.checkIfShouldMoveSystemRegionAsync();
    status.setStatus("Starting quota manager");
    initQuotaManager();
    if (QuotaUtil.isQuotaEnabled(conf)) {
        // Create the quota snapshot notifier
        spaceQuotaSnapshotNotifier = createQuotaSnapshotNotifier();
        spaceQuotaSnapshotNotifier.initialize(getConnection());
        this.quotaObserverChore = new QuotaObserverChore(this, getMasterMetrics());
        // Start the chore to read the region FS space reports and act on them
        getChoreService().scheduleChore(quotaObserverChore);
        this.snapshotQuotaChore = new SnapshotQuotaObserverChore(this, getMasterMetrics());
        // Start the chore to read snapshots and add their usage to table/NS quotas
        getChoreService().scheduleChore(snapshotQuotaChore);
    }
    final SlowLogMasterService slowLogMasterService = new SlowLogMasterService(conf, this);
    slowLogMasterService.init();
    // clear the dead servers with same host name and port of online server because we are not
    // removing dead server with same hostname and port of rs which is trying to check in before
    // master initialization. See HBASE-5916.
    this.serverManager.clearDeadServersWithSameHostNameAndPortOfOnlineServer();
    // Check and set the znode ACLs if needed in case we are overtaking a non-secure configuration
    status.setStatus("Checking ZNode ACLs");
    zooKeeper.checkAndSetZNodeAcls();
    status.setStatus("Initializing MOB Cleaner");
    initMobCleaner();
    status.setStatus("Calling postStartMaster coprocessors");
    if (this.cpHost != null) {
        // don't let cp initialization errors kill the master
        try {
            this.cpHost.postStartMaster();
        } catch (IOException ioe) {
            LOG.error("Coprocessor postStartMaster() hook failed", ioe);
        }
    }
    zombieDetector.interrupt();
    /*
     * After master has started up, lets do balancer post startup initialization. Since this runs
     * in activeMasterManager thread, it should be fine.
     */
    long start = EnvironmentEdgeManager.currentTime();
    this.balancer.postMasterStartupInitialize();
    if (LOG.isDebugEnabled()) {
        LOG.debug("Balancer post startup initialization complete, took " + ((EnvironmentEdgeManager.currentTime() - start) / 1000) + " seconds");
    }
    this.rollingUpgradeChore = new RollingUpgradeChore(this);
    getChoreService().scheduleChore(rollingUpgradeChore);
}

Example 5 with MasterProcedureEnv

use of org.apache.hadoop.hbase.master.procedure.MasterProcedureEnv in project hbase by apache.

the class HMaster method isRegionOnline.

/**
 * @return True if region is online and scannable else false if an error or shutdown (Otherwise
 *   we just block in here holding up all forward-progess).
 */
private boolean isRegionOnline(RegionInfo ri) {
    RetryCounter rc = null;
    while (!isStopped()) {
        RegionState rs = this.assignmentManager.getRegionStates().getRegionState(ri);
        if (rs.isOpened()) {
            if (this.getServerManager().isServerOnline(rs.getServerName())) {
                return true;
            }
        }
        // Region is not OPEN.
        Optional<Procedure<MasterProcedureEnv>> optProc = this.procedureExecutor.getProcedures().stream().filter(p -> p instanceof ServerCrashProcedure).findAny();
        // TODO: Add a page to refguide on how to do repair. Have this log message point to it.
        // Page will talk about loss of edits, how to schedule at least the meta WAL recovery, and
        // then how to assign including how to break region lock if one held.
        LOG.warn("{} is NOT online; state={}; ServerCrashProcedures={}. Master startup cannot " + "progress, in holding-pattern until region onlined.", ri.getRegionNameAsString(), rs, optProc.isPresent());
        // Check once-a-minute.
        if (rc == null) {
            rc = new RetryCounterFactory(Integer.MAX_VALUE, 1000, 60_000).create();
        }
        Threads.sleep(rc.getBackoffTimeAndIncrementAttempts());
    }
    return false;
}