Examples with Daemon org.apache.hadoop.util.Daemon used on opensource projects

Example 11 with Daemon

use of org.apache.hadoop.util.Daemon in project hadoop by apache.

the class JournalNodeSyncer method startSyncJournalsDaemon.

private void startSyncJournalsDaemon() {
    syncJournalDaemon = new Daemon(new Runnable() {

        @Override
        public void run() {
            while (shouldSync) {
                try {
                    if (!journal.isFormatted()) {
                        LOG.warn("Journal not formatted. Cannot sync.");
                    } else {
                        syncJournals();
                    }
                    Thread.sleep(journalSyncInterval);
                } catch (Throwable t) {
                    if (!shouldSync) {
                        if (t instanceof InterruptedException) {
                            LOG.info("Stopping JournalNode Sync.");
                        } else {
                            LOG.warn("JournalNodeSyncer received an exception while " + "shutting down.", t);
                        }
                        break;
                    } else {
                        if (t instanceof InterruptedException) {
                            LOG.warn("JournalNodeSyncer interrupted", t);
                            break;
                        }
                    }
                    LOG.error("JournalNodeSyncer daemon received Runtime exception. ", t);
                }
            }
        }
    });
    syncJournalDaemon.start();
}

Example 12 with Daemon

use of org.apache.hadoop.util.Daemon in project hadoop by apache.

the class SecondaryNameNode method startCheckpointThread.

public void startCheckpointThread() {
    Preconditions.checkState(checkpointThread == null, "Should not already have a thread");
    Preconditions.checkState(shouldRun, "shouldRun should be true");
    checkpointThread = new Daemon(this);
    checkpointThread.start();
}

Example 13 with Daemon

use of org.apache.hadoop.util.Daemon in project hadoop by apache.

the class DataNodeDiskMetrics method startDiskOutlierDetectionThread.

private void startDiskOutlierDetectionThread() {
    slowDiskDetectionDaemon = new Daemon(new Runnable() {

        @Override
        public void run() {
            while (shouldRun) {
                Map<String, Double> metadataOpStats = Maps.newHashMap();
                Map<String, Double> readIoStats = Maps.newHashMap();
                Map<String, Double> writeIoStats = Maps.newHashMap();
                FsDatasetSpi.FsVolumeReferences fsVolumeReferences = null;
                try {
                    fsVolumeReferences = dn.getFSDataset().getFsVolumeReferences();
                    Iterator<FsVolumeSpi> volumeIterator = fsVolumeReferences.iterator();
                    while (volumeIterator.hasNext()) {
                        FsVolumeSpi volume = volumeIterator.next();
                        DataNodeVolumeMetrics metrics = volumeIterator.next().getMetrics();
                        String volumeName = volume.getBaseURI().getPath();
                        metadataOpStats.put(volumeName, metrics.getMetadataOperationMean());
                        readIoStats.put(volumeName, metrics.getReadIoMean());
                        writeIoStats.put(volumeName, metrics.getWriteIoMean());
                    }
                } finally {
                    if (fsVolumeReferences != null) {
                        try {
                            fsVolumeReferences.close();
                        } catch (IOException e) {
                            LOG.error("Error in releasing FS Volume references", e);
                        }
                    }
                }
                if (metadataOpStats.isEmpty() && readIoStats.isEmpty() && writeIoStats.isEmpty()) {
                    LOG.debug("No disk stats available for detecting outliers.");
                    return;
                }
                detectAndUpdateDiskOutliers(metadataOpStats, readIoStats, writeIoStats);
                try {
                    Thread.sleep(detectionInterval);
                } catch (InterruptedException e) {
                    LOG.error("Disk Outlier Detection thread interrupted", e);
                    Thread.currentThread().interrupt();
                }
            }
        }
    });
    slowDiskDetectionDaemon.start();
}

Example 14 with Daemon

use of org.apache.hadoop.util.Daemon in project hive by apache.

the class TokenStoreDelegationTokenSecretManager method startThreads.

@Override
public synchronized void startThreads() throws IOException {
    try {
        // updateCurrentKey needs to be called to initialize the master key
        // (there should be a null check added in the future in rollMasterKey)
        // updateCurrentKey();
        Method m = AbstractDelegationTokenSecretManager.class.getDeclaredMethod("updateCurrentKey");
        m.setAccessible(true);
        m.invoke(this);
    } catch (Exception e) {
        throw new IOException("Failed to initialize master key", e);
    }
    running = true;
    tokenRemoverThread = new Daemon(new ExpiredTokenRemover());
    tokenRemoverThread.start();
}

Example 15 with Daemon

use of org.apache.hadoop.util.Daemon in project hive by apache.

the class JvmPauseMonitor method start.

public void start() {
    Preconditions.checkState(monitorThread == null, "JvmPauseMonitor thread is Already started");
    monitorThread = new Daemon(new Monitor());
    monitorThread.start();
}