Examples with TabletLocation org.apache.accumulo.core.clientImpl.TabletLocator.TabletLocation used on opensource projects

Example 6 with TabletLocation

use of org.apache.accumulo.core.clientImpl.TabletLocator.TabletLocation in project accumulo by apache.

the class MetadataLocationObtainer method getMetadataLocationEntries.

public static TabletLocations getMetadataLocationEntries(SortedMap<Key, Value> entries) {
    Text location = null;
    Text session = null;
    List<TabletLocation> results = new ArrayList<>();
    ArrayList<KeyExtent> locationless = new ArrayList<>();
    Text lastRowFromKey = new Text();
    // text obj below is meant to be reused in loop for efficiency
    Text colf = new Text();
    Text colq = new Text();
    for (Entry<Key, Value> entry : entries.entrySet()) {
        Key key = entry.getKey();
        Value val = entry.getValue();
        if (key.compareRow(lastRowFromKey) != 0) {
            location = null;
            session = null;
            key.getRow(lastRowFromKey);
        }
        colf = key.getColumnFamily(colf);
        colq = key.getColumnQualifier(colq);
        // interpret the row id as a key extent
        if (colf.equals(CurrentLocationColumnFamily.NAME) || colf.equals(FutureLocationColumnFamily.NAME)) {
            if (location != null) {
                throw new IllegalStateException("Tablet has multiple locations : " + lastRowFromKey);
            }
            location = new Text(val.toString());
            session = new Text(colq);
        } else if (TabletColumnFamily.PREV_ROW_COLUMN.equals(colf, colq)) {
            KeyExtent ke = KeyExtent.fromMetaPrevRow(entry);
            if (location != null)
                results.add(new TabletLocation(ke, location.toString(), session.toString()));
            else
                locationless.add(ke);
            location = null;
        }
    }
    return new TabletLocations(results, locationless);
}

Example 7 with TabletLocation

use of org.apache.accumulo.core.clientImpl.TabletLocator.TabletLocation in project accumulo by apache.

the class TabletLocatorImplTest method locateTabletTest.

private void locateTabletTest(TabletLocatorImpl cache, String row, boolean skipRow, KeyExtent expected, String server) throws Exception {
    TabletLocation tl = cache.locateTablet(context, new Text(row), skipRow, false);
    if (expected == null) {
        if (tl != null)
            System.out.println("tl = " + tl);
        assertNull(tl);
    } else {
        assertNotNull(tl);
        assertEquals(server, tl.tablet_location);
        assertEquals(expected, tl.tablet_extent);
    }
}

Example 8 with TabletLocation

use of org.apache.accumulo.core.clientImpl.TabletLocator.TabletLocation in project accumulo by apache.

the class TabletLocatorImplTest method runTest.

static void runTest(TreeMap<Text, TabletLocation> mc, KeyExtent remove, Set<KeyExtent> expected) {
    // copy so same metaCache can be used for multiple test
    mc = new TreeMap<>(mc);
    TabletLocatorImpl.removeOverlapping(mc, remove);
    HashSet<KeyExtent> eic = new HashSet<>();
    for (TabletLocation tl : mc.values()) {
        eic.add(tl.tablet_extent);
    }
    assertEquals(expected, eic);
}

Example 9 with TabletLocation

use of org.apache.accumulo.core.clientImpl.TabletLocator.TabletLocation in project accumulo by apache.

the class BulkImporter method importFiles.

public AssignmentStats importFiles(List<String> files) {
    int numThreads = context.getConfiguration().getCount(Property.TSERV_BULK_PROCESS_THREADS);
    int numAssignThreads = context.getConfiguration().getCount(Property.TSERV_BULK_ASSIGNMENT_THREADS);
    timer = new StopWatch<>(Timers.class);
    timer.start(Timers.TOTAL);
    final VolumeManager fs = context.getVolumeManager();
    Set<Path> paths = new HashSet<>();
    for (String file : files) {
        paths.add(new Path(file));
    }
    AssignmentStats assignmentStats = new AssignmentStats(paths.size());
    final Map<Path, List<KeyExtent>> completeFailures = Collections.synchronizedSortedMap(new TreeMap<>());
    ClientService.Client client = null;
    final TabletLocator locator = TabletLocator.getLocator(context, TableId.of(tableId));
    try {
        final Map<Path, List<TabletLocation>> assignments = Collections.synchronizedSortedMap(new TreeMap<>());
        timer.start(Timers.EXAMINE_MAP_FILES);
        ExecutorService threadPool = ThreadPools.createFixedThreadPool(numThreads, "findOverlapping", false);
        for (Path path : paths) {
            final Path mapFile = path;
            Runnable getAssignments = new Runnable() {

                @Override
                public void run() {
                    List<TabletLocation> tabletsToAssignMapFileTo = Collections.emptyList();
                    try {
                        tabletsToAssignMapFileTo = findOverlappingTablets(context, fs, locator, mapFile);
                    } catch (Exception ex) {
                        log.warn("Unable to find tablets that overlap file " + mapFile, ex);
                    }
                    log.debug("Map file {} found to overlap {} tablets", mapFile, tabletsToAssignMapFileTo.size());
                    if (tabletsToAssignMapFileTo.isEmpty()) {
                        List<KeyExtent> empty = Collections.emptyList();
                        completeFailures.put(mapFile, empty);
                    } else
                        assignments.put(mapFile, tabletsToAssignMapFileTo);
                }
            };
            threadPool.submit(getAssignments);
        }
        threadPool.shutdown();
        while (!threadPool.isTerminated()) {
            try {
                threadPool.awaitTermination(60, TimeUnit.SECONDS);
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }
        }
        timer.stop(Timers.EXAMINE_MAP_FILES);
        assignmentStats.attemptingAssignments(assignments);
        Map<Path, List<KeyExtent>> assignmentFailures = assignMapFiles(fs, assignments, paths, numAssignThreads, numThreads);
        assignmentStats.assignmentsFailed(assignmentFailures);
        Map<Path, Integer> failureCount = new TreeMap<>();
        for (Entry<Path, List<KeyExtent>> entry : assignmentFailures.entrySet()) failureCount.put(entry.getKey(), 1);
        long sleepTime = 2_000;
        while (!assignmentFailures.isEmpty()) {
            sleepTime = Math.min(sleepTime * 2, MINUTES.toMillis(1));
            locator.invalidateCache();
            // assumption about assignment failures is that it caused by a split
            // happening or a missing location
            // 
            // for splits we need to find children key extents that cover the
            // same key range and are contiguous (no holes, no overlap)
            timer.start(Timers.SLEEP);
            sleepUninterruptibly(sleepTime, TimeUnit.MILLISECONDS);
            timer.stop(Timers.SLEEP);
            log.debug("Trying to assign {} map files that previously failed on some key extents", assignmentFailures.size());
            assignments.clear();
            // assign to
            for (Entry<Path, List<KeyExtent>> entry : assignmentFailures.entrySet()) {
                Iterator<KeyExtent> keListIter = entry.getValue().iterator();
                List<TabletLocation> tabletsToAssignMapFileTo = new ArrayList<>();
                while (keListIter.hasNext()) {
                    KeyExtent ke = keListIter.next();
                    timer.start(Timers.QUERY_METADATA);
                    try {
                        tabletsToAssignMapFileTo.addAll(findOverlappingTablets(context, fs, locator, entry.getKey(), ke));
                        keListIter.remove();
                    } catch (Exception ex) {
                        log.warn("Exception finding overlapping tablets, will retry tablet " + ke, ex);
                    }
                    timer.stop(Timers.QUERY_METADATA);
                }
                if (!tabletsToAssignMapFileTo.isEmpty())
                    assignments.put(entry.getKey(), tabletsToAssignMapFileTo);
            }
            assignmentStats.attemptingAssignments(assignments);
            Map<Path, List<KeyExtent>> assignmentFailures2 = assignMapFiles(fs, assignments, paths, numAssignThreads, numThreads);
            assignmentStats.assignmentsFailed(assignmentFailures2);
            // merge assignmentFailures2 into assignmentFailures
            for (Entry<Path, List<KeyExtent>> entry : assignmentFailures2.entrySet()) {
                assignmentFailures.get(entry.getKey()).addAll(entry.getValue());
                Integer fc = failureCount.get(entry.getKey());
                if (fc == null)
                    fc = 0;
                failureCount.put(entry.getKey(), fc + 1);
            }
            // remove map files that have no more key extents to assign
            assignmentFailures.values().removeIf(List::isEmpty);
            Set<Entry<Path, Integer>> failureIter = failureCount.entrySet();
            for (Entry<Path, Integer> entry : failureIter) {
                int retries = context.getConfiguration().getCount(Property.TSERV_BULK_RETRY);
                if (entry.getValue() > retries && assignmentFailures.get(entry.getKey()) != null) {
                    log.error("Map file {} failed more than {} times, giving up.", entry.getKey(), retries);
                    completeFailures.put(entry.getKey(), assignmentFailures.get(entry.getKey()));
                    assignmentFailures.remove(entry.getKey());
                }
            }
        }
        assignmentStats.assignmentsAbandoned(completeFailures);
        Set<Path> failedFailures = processFailures(completeFailures);
        assignmentStats.unrecoveredMapFiles(failedFailures);
        timer.stop(Timers.TOTAL);
        printReport(paths);
        return assignmentStats;
    } finally {
        if (client != null) {
            ServerClient.close(client, context);
        }
    }
}

Example 10 with TabletLocation

use of org.apache.accumulo.core.clientImpl.TabletLocator.TabletLocation in project accumulo by apache.

the class BulkImporter method estimateSizes.

private Map<Path, List<AssignmentInfo>> estimateSizes(final VolumeManager vm, Map<Path, List<TabletLocation>> assignments, Collection<Path> paths, int numThreads) {
    long t1 = System.currentTimeMillis();
    final Map<Path, Long> mapFileSizes = new TreeMap<>();
    try {
        for (Path path : paths) {
            FileSystem fs = vm.getFileSystemByPath(path);
            mapFileSizes.put(path, fs.getContentSummary(path).getLength());
        }
    } catch (IOException e) {
        log.error("Failed to get map files in for {}: {}", paths, e.getMessage(), e);
        throw new RuntimeException(e);
    }
    final Map<Path, List<AssignmentInfo>> ais = Collections.synchronizedMap(new TreeMap<>());
    ExecutorService threadPool = ThreadPools.createFixedThreadPool(numThreads, "estimateSizes", false);
    for (final Entry<Path, List<TabletLocation>> entry : assignments.entrySet()) {
        if (entry.getValue().size() == 1) {
            TabletLocation tabletLocation = entry.getValue().get(0);
            // if the tablet completely contains the map file, there is no
            // need to estimate its
            // size
            ais.put(entry.getKey(), Collections.singletonList(new AssignmentInfo(tabletLocation.tablet_extent, mapFileSizes.get(entry.getKey()))));
            continue;
        }
        Runnable estimationTask = new Runnable() {

            @Override
            public void run() {
                Map<KeyExtent, Long> estimatedSizes = null;
                try {
                    estimatedSizes = FileUtil.estimateSizes(context, entry.getKey(), mapFileSizes.get(entry.getKey()), extentsOf(entry.getValue()));
                } catch (IOException e) {
                    log.warn("Failed to estimate map file sizes {}", e.getMessage());
                }
                if (estimatedSizes == null) {
                    // estimation failed, do a simple estimation
                    estimatedSizes = new TreeMap<>();
                    long estSize = (long) (mapFileSizes.get(entry.getKey()) / (double) entry.getValue().size());
                    for (TabletLocation tl : entry.getValue()) estimatedSizes.put(tl.tablet_extent, estSize);
                }
                List<AssignmentInfo> assignmentInfoList = new ArrayList<>(estimatedSizes.size());
                for (Entry<KeyExtent, Long> entry2 : estimatedSizes.entrySet()) assignmentInfoList.add(new AssignmentInfo(entry2.getKey(), entry2.getValue()));
                ais.put(entry.getKey(), assignmentInfoList);
            }
        };
        threadPool.submit(estimationTask);
    }
    threadPool.shutdown();
    while (!threadPool.isTerminated()) {
        try {
            threadPool.awaitTermination(60, TimeUnit.SECONDS);
        } catch (InterruptedException e) {
            log.error("Encountered InterruptedException while waiting for the threadPool to terminate.", e);
            throw new RuntimeException(e);
        }
    }
    long t2 = System.currentTimeMillis();
    log.debug(String.format("Estimated map files sizes in %6.2f secs", (t2 - t1) / 1000.0));
    return ais;
}