Examples with TabletLocationState org.apache.accumulo.server.master.state.TabletLocationState used on opensource projects

Example 1 with TabletLocationState

use of org.apache.accumulo.server.master.state.TabletLocationState in project accumulo by apache.

the class MasterAssignmentIT method test.

@Test
public void test() throws Exception {
    Connector c = getConnector();
    String tableName = super.getUniqueNames(1)[0];
    c.tableOperations().create(tableName);
    String tableId = c.tableOperations().tableIdMap().get(tableName);
    // wait for the table to be online
    TabletLocationState newTablet;
    do {
        UtilWaitThread.sleep(250);
        newTablet = getTabletLocationState(c, tableId);
    } while (newTablet.current == null);
    assertNull(newTablet.last);
    assertNull(newTablet.future);
    // put something in it
    BatchWriter bw = c.createBatchWriter(tableName, new BatchWriterConfig());
    Mutation m = new Mutation("a");
    m.put("b", "c", "d");
    bw.addMutation(m);
    bw.close();
    // give it a last location
    c.tableOperations().flush(tableName, null, null, true);
    TabletLocationState flushed = getTabletLocationState(c, tableId);
    assertEquals(newTablet.current, flushed.current);
    assertEquals(flushed.current, flushed.last);
    assertNull(newTablet.future);
    // take the tablet offline
    c.tableOperations().offline(tableName, true);
    TabletLocationState offline = getTabletLocationState(c, tableId);
    assertNull(offline.future);
    assertNull(offline.current);
    assertEquals(flushed.current, offline.last);
    // put it back online
    c.tableOperations().online(tableName, true);
    TabletLocationState online = getTabletLocationState(c, tableId);
    assertNull(online.future);
    assertNotNull(online.current);
    assertEquals(online.current, online.last);
}

Example 2 with TabletLocationState

use of org.apache.accumulo.server.master.state.TabletLocationState in project accumulo by apache.

the class TabletServer method verifyRootTablet.

private static Pair<Text, KeyExtent> verifyRootTablet(KeyExtent extent, TServerInstance instance) throws DistributedStoreException, AccumuloException {
    ZooTabletStateStore store = new ZooTabletStateStore();
    if (!store.iterator().hasNext()) {
        throw new AccumuloException("Illegal state: location is not set in zookeeper");
    }
    TabletLocationState next = store.iterator().next();
    if (!instance.equals(next.future)) {
        throw new AccumuloException("Future location is not to this server for the root tablet");
    }
    if (next.current != null) {
        throw new AccumuloException("Root tablet already has a location set");
    }
    try {
        return new Pair<>(new Text(MetadataTableUtil.getRootTabletDir()), null);
    } catch (IOException e) {
        throw new AccumuloException(e);
    }
}

Example 3 with TabletLocationState

use of org.apache.accumulo.server.master.state.TabletLocationState in project accumulo by apache.

the class TabletGroupWatcher method run.

@Override
public void run() {
    Thread.currentThread().setName("Watching " + store.name());
    int[] oldCounts = new int[TabletState.values().length];
    EventCoordinator.Listener eventListener = this.master.nextEvent.getListener();
    WalStateManager wals = new WalStateManager(master.getInstance(), ZooReaderWriter.getInstance());
    while (this.master.stillMaster()) {
        // slow things down a little, otherwise we spam the logs when there are many wake-up events
        sleepUninterruptibly(100, TimeUnit.MILLISECONDS);
        masterState = master.getMasterState();
        int totalUnloaded = 0;
        int unloaded = 0;
        ClosableIterator<TabletLocationState> iter = null;
        try {
            Map<Table.ID, MergeStats> mergeStatsCache = new HashMap<>();
            Map<Table.ID, MergeStats> currentMerges = new HashMap<>();
            for (MergeInfo merge : master.merges()) {
                if (merge.getExtent() != null) {
                    currentMerges.put(merge.getExtent().getTableId(), new MergeStats(merge));
                }
            }
            // Get the current status for the current list of tservers
            SortedMap<TServerInstance, TabletServerStatus> currentTServers = new TreeMap<>();
            for (TServerInstance entry : this.master.tserverSet.getCurrentServers()) {
                currentTServers.put(entry, this.master.tserverStatus.get(entry));
            }
            if (currentTServers.size() == 0) {
                eventListener.waitForEvents(Master.TIME_TO_WAIT_BETWEEN_SCANS);
                synchronized (this) {
                    lastScanServers = ImmutableSortedSet.of();
                }
                continue;
            }
            // Don't move tablets to servers that are shutting down
            SortedMap<TServerInstance, TabletServerStatus> destinations = new TreeMap<>(currentTServers);
            destinations.keySet().removeAll(this.master.serversToShutdown);
            List<Assignment> assignments = new ArrayList<>();
            List<Assignment> assigned = new ArrayList<>();
            List<TabletLocationState> assignedToDeadServers = new ArrayList<>();
            List<TabletLocationState> suspendedToGoneServers = new ArrayList<>();
            Map<KeyExtent, TServerInstance> unassigned = new HashMap<>();
            Map<TServerInstance, List<Path>> logsForDeadServers = new TreeMap<>();
            MasterState masterState = master.getMasterState();
            int[] counts = new int[TabletState.values().length];
            stats.begin();
            // Walk through the tablets in our store, and work tablets
            // towards their goal
            iter = store.iterator();
            while (iter.hasNext()) {
                TabletLocationState tls = iter.next();
                if (tls == null) {
                    continue;
                }
                Master.log.debug("{} location State: {}", store.name(), tls);
                // ignore entries for tables that do not exist in zookeeper
                if (TableManager.getInstance().getTableState(tls.extent.getTableId()) == null)
                    continue;
                if (Master.log.isTraceEnabled())
                    Master.log.trace("{} walogs {}", tls, tls.walogs.size());
                // Don't overwhelm the tablet servers with work
                if (unassigned.size() + unloaded > Master.MAX_TSERVER_WORK_CHUNK * currentTServers.size()) {
                    flushChanges(destinations, assignments, assigned, assignedToDeadServers, logsForDeadServers, suspendedToGoneServers, unassigned);
                    assignments.clear();
                    assigned.clear();
                    assignedToDeadServers.clear();
                    suspendedToGoneServers.clear();
                    unassigned.clear();
                    unloaded = 0;
                    eventListener.waitForEvents(Master.TIME_TO_WAIT_BETWEEN_SCANS);
                }
                Table.ID tableId = tls.extent.getTableId();
                TableConfiguration tableConf = this.master.getConfigurationFactory().getTableConfiguration(tableId);
                MergeStats mergeStats = mergeStatsCache.get(tableId);
                if (mergeStats == null) {
                    mergeStats = currentMerges.get(tableId);
                    if (mergeStats == null) {
                        mergeStats = new MergeStats(new MergeInfo());
                    }
                    mergeStatsCache.put(tableId, mergeStats);
                }
                TabletGoalState goal = this.master.getGoalState(tls, mergeStats.getMergeInfo());
                TServerInstance server = tls.getServer();
                TabletState state = tls.getState(currentTServers.keySet());
                if (Master.log.isTraceEnabled()) {
                    Master.log.trace("Goal state {} current {} for {}", goal, state, tls.extent);
                }
                stats.update(tableId, state);
                mergeStats.update(tls.extent, state, tls.chopped, !tls.walogs.isEmpty());
                sendChopRequest(mergeStats.getMergeInfo(), state, tls);
                sendSplitRequest(mergeStats.getMergeInfo(), state, tls);
                // Always follow through with assignments
                if (state == TabletState.ASSIGNED) {
                    goal = TabletGoalState.HOSTED;
                }
                // if we are shutting down all the tabletservers, we have to do it in order
                if (goal == TabletGoalState.SUSPENDED && state == TabletState.HOSTED) {
                    if (this.master.serversToShutdown.equals(currentTServers.keySet())) {
                        if (dependentWatcher != null && dependentWatcher.assignedOrHosted() > 0) {
                            goal = TabletGoalState.HOSTED;
                        }
                    }
                }
                if (goal == TabletGoalState.HOSTED) {
                    if (state != TabletState.HOSTED && !tls.walogs.isEmpty()) {
                        if (this.master.recoveryManager.recoverLogs(tls.extent, tls.walogs))
                            continue;
                    }
                    switch(state) {
                        case HOSTED:
                            if (server.equals(this.master.migrations.get(tls.extent)))
                                this.master.migrations.remove(tls.extent);
                            break;
                        case ASSIGNED_TO_DEAD_SERVER:
                            assignedToDeadServers.add(tls);
                            if (server.equals(this.master.migrations.get(tls.extent)))
                                this.master.migrations.remove(tls.extent);
                            TServerInstance tserver = tls.futureOrCurrent();
                            if (!logsForDeadServers.containsKey(tserver)) {
                                logsForDeadServers.put(tserver, wals.getWalsInUse(tserver));
                            }
                            break;
                        case SUSPENDED:
                            if (master.getSteadyTime() - tls.suspend.suspensionTime < tableConf.getTimeInMillis(Property.TABLE_SUSPEND_DURATION)) {
                                // Tablet is suspended. See if its tablet server is back.
                                TServerInstance returnInstance = null;
                                Iterator<TServerInstance> find = destinations.tailMap(new TServerInstance(tls.suspend.server, " ")).keySet().iterator();
                                if (find.hasNext()) {
                                    TServerInstance found = find.next();
                                    if (found.getLocation().equals(tls.suspend.server)) {
                                        returnInstance = found;
                                    }
                                }
                                // Old tablet server is back. Return this tablet to its previous owner.
                                if (returnInstance != null) {
                                    assignments.add(new Assignment(tls.extent, returnInstance));
                                } else {
                                // leave suspended, don't ask for a new assignment.
                                }
                            } else {
                                // Treat as unassigned, ask for a new assignment.
                                unassigned.put(tls.extent, server);
                            }
                            break;
                        case UNASSIGNED:
                            // maybe it's a finishing migration
                            TServerInstance dest = this.master.migrations.get(tls.extent);
                            if (dest != null) {
                                // if destination is still good, assign it
                                if (destinations.keySet().contains(dest)) {
                                    assignments.add(new Assignment(tls.extent, dest));
                                } else {
                                    // get rid of this migration
                                    this.master.migrations.remove(tls.extent);
                                    unassigned.put(tls.extent, server);
                                }
                            } else {
                                unassigned.put(tls.extent, server);
                            }
                            break;
                        case ASSIGNED:
                            // Send another reminder
                            assigned.add(new Assignment(tls.extent, tls.future));
                            break;
                    }
                } else {
                    switch(state) {
                        case SUSPENDED:
                            // Request a move to UNASSIGNED, so as to allow balancing to continue.
                            suspendedToGoneServers.add(tls);
                            cancelOfflineTableMigrations(tls);
                            break;
                        case UNASSIGNED:
                            cancelOfflineTableMigrations(tls);
                            break;
                        case ASSIGNED_TO_DEAD_SERVER:
                            assignedToDeadServers.add(tls);
                            if (!logsForDeadServers.containsKey(tls.futureOrCurrent())) {
                                logsForDeadServers.put(tls.futureOrCurrent(), wals.getWalsInUse(tls.futureOrCurrent()));
                            }
                            break;
                        case HOSTED:
                            TServerConnection conn = this.master.tserverSet.getConnection(server);
                            if (conn != null) {
                                conn.unloadTablet(this.master.masterLock, tls.extent, goal.howUnload(), master.getSteadyTime());
                                unloaded++;
                                totalUnloaded++;
                            } else {
                                Master.log.warn("Could not connect to server {}", server);
                            }
                            break;
                        case ASSIGNED:
                            break;
                    }
                }
                counts[state.ordinal()]++;
            }
            flushChanges(destinations, assignments, assigned, assignedToDeadServers, logsForDeadServers, suspendedToGoneServers, unassigned);
            // provide stats after flushing changes to avoid race conditions w/ delete table
            stats.end(masterState);
            // Report changes
            for (TabletState state : TabletState.values()) {
                int i = state.ordinal();
                if (counts[i] > 0 && counts[i] != oldCounts[i]) {
                    this.master.nextEvent.event("[%s]: %d tablets are %s", store.name(), counts[i], state.name());
                }
            }
            Master.log.debug(String.format("[%s]: scan time %.2f seconds", store.name(), stats.getScanTime() / 1000.));
            oldCounts = counts;
            if (totalUnloaded > 0) {
                this.master.nextEvent.event("[%s]: %d tablets unloaded", store.name(), totalUnloaded);
            }
            updateMergeState(mergeStatsCache);
            synchronized (this) {
                lastScanServers = ImmutableSortedSet.copyOf(currentTServers.keySet());
            }
            if (this.master.tserverSet.getCurrentServers().equals(currentTServers.keySet())) {
                Master.log.debug(String.format("[%s] sleeping for %.2f seconds", store.name(), Master.TIME_TO_WAIT_BETWEEN_SCANS / 1000.));
                eventListener.waitForEvents(Master.TIME_TO_WAIT_BETWEEN_SCANS);
            } else {
                Master.log.info("Detected change in current tserver set, re-running state machine.");
            }
        } catch (Exception ex) {
            Master.log.error("Error processing table state for store " + store.name(), ex);
            if (ex.getCause() != null && ex.getCause() instanceof BadLocationStateException) {
                repairMetadata(((BadLocationStateException) ex.getCause()).getEncodedEndRow());
            } else {
                sleepUninterruptibly(Master.WAIT_BETWEEN_ERRORS, TimeUnit.MILLISECONDS);
            }
        } finally {
            if (iter != null) {
                try {
                    iter.close();
                } catch (IOException ex) {
                    Master.log.warn("Error closing TabletLocationState iterator: " + ex, ex);
                }
            }
        }
    }
}

Example 4 with TabletLocationState

use of org.apache.accumulo.server.master.state.TabletLocationState in project accumulo by apache.

the class MergeStats method verifyMergeConsistency.

private boolean verifyMergeConsistency(Connector connector, CurrentState master) throws TableNotFoundException, IOException {
    MergeStats verify = new MergeStats(info);
    KeyExtent extent = info.getExtent();
    Scanner scanner = connector.createScanner(extent.isMeta() ? RootTable.NAME : MetadataTable.NAME, Authorizations.EMPTY);
    MetaDataTableScanner.configureScanner(scanner, master);
    Text start = extent.getPrevEndRow();
    if (start == null) {
        start = new Text();
    }
    Table.ID tableId = extent.getTableId();
    Text first = KeyExtent.getMetadataEntry(tableId, start);
    Range range = new Range(first, false, null, true);
    scanner.setRange(range.clip(MetadataSchema.TabletsSection.getRange()));
    KeyExtent prevExtent = null;
    log.debug("Scanning range {}", range);
    for (Entry<Key, Value> entry : scanner) {
        TabletLocationState tls;
        try {
            tls = MetaDataTableScanner.createTabletLocationState(entry.getKey(), entry.getValue());
        } catch (BadLocationStateException e) {
            log.error("{}", e.getMessage(), e);
            return false;
        }
        log.debug("consistency check: {} walogs {}", tls, tls.walogs.size());
        if (!tls.extent.getTableId().equals(tableId)) {
            break;
        }
        if (!tls.walogs.isEmpty() && verify.getMergeInfo().needsToBeChopped(tls.extent)) {
            log.debug("failing consistency: needs to be chopped {}", tls.extent);
            return false;
        }
        if (prevExtent == null) {
            // this is the first tablet observed, it must be offline and its prev row must be less than the start of the merge range
            if (tls.extent.getPrevEndRow() != null && tls.extent.getPrevEndRow().compareTo(start) > 0) {
                log.debug("failing consistency: prev row is too high {}", start);
                return false;
            }
            if (tls.getState(master.onlineTabletServers()) != TabletState.UNASSIGNED && tls.getState(master.onlineTabletServers()) != TabletState.SUSPENDED) {
                log.debug("failing consistency: assigned or hosted {}", tls);
                return false;
            }
        } else if (!tls.extent.isPreviousExtent(prevExtent)) {
            log.debug("hole in {}", MetadataTable.NAME);
            return false;
        }
        prevExtent = tls.extent;
        verify.update(tls.extent, tls.getState(master.onlineTabletServers()), tls.chopped, !tls.walogs.isEmpty());
        // stop when we've seen the tablet just beyond our range
        if (tls.extent.getPrevEndRow() != null && extent.getEndRow() != null && tls.extent.getPrevEndRow().compareTo(extent.getEndRow()) > 0) {
            break;
        }
    }
    log.debug("chopped {} v.chopped {} unassigned {} v.unassigned {} verify.total {}", chopped, verify.chopped, unassigned, verify.unassigned, verify.total);
    return chopped == verify.chopped && unassigned == verify.unassigned && unassigned == verify.total;
}

Example 5 with TabletLocationState

use of org.apache.accumulo.server.master.state.TabletLocationState in project accumulo by apache.

the class RootTabletStateStoreTest method testRootTabletStateStore.

@Test
public void testRootTabletStateStore() throws DistributedStoreException {
    ZooTabletStateStore tstore = new ZooTabletStateStore(new FakeZooStore());
    KeyExtent root = RootTable.EXTENT;
    String sessionId = "this is my unique session data";
    TServerInstance server = new TServerInstance(HostAndPort.fromParts("127.0.0.1", 10000), sessionId);
    List<Assignment> assignments = Collections.singletonList(new Assignment(root, server));
    tstore.setFutureLocations(assignments);
    int count = 0;
    for (TabletLocationState location : tstore) {
        assertEquals(location.extent, root);
        assertEquals(location.future, server);
        assertNull(location.current);
        count++;
    }
    assertEquals(count, 1);
    tstore.setLocations(assignments);
    count = 0;
    for (TabletLocationState location : tstore) {
        assertEquals(location.extent, root);
        assertNull(location.future);
        assertEquals(location.current, server);
        count++;
    }
    assertEquals(count, 1);
    TabletLocationState assigned = null;
    try {
        assigned = new TabletLocationState(root, server, null, null, null, null, false);
    } catch (BadLocationStateException e) {
        fail("Unexpected error " + e);
    }
    tstore.unassign(Collections.singletonList(assigned), null);
    count = 0;
    for (TabletLocationState location : tstore) {
        assertEquals(location.extent, root);
        assertNull(location.future);
        assertNull(location.current);
        count++;
    }
    assertEquals(count, 1);
    KeyExtent notRoot = new KeyExtent(Table.ID.of("0"), null, null);
    try {
        tstore.setLocations(Collections.singletonList(new Assignment(notRoot, server)));
        Assert.fail("should not get here");
    } catch (IllegalArgumentException ex) {
    }
    try {
        tstore.setFutureLocations(Collections.singletonList(new Assignment(notRoot, server)));
        Assert.fail("should not get here");
    } catch (IllegalArgumentException ex) {
    }
    TabletLocationState broken = null;
    try {
        broken = new TabletLocationState(notRoot, server, null, null, null, null, false);
    } catch (BadLocationStateException e) {
        fail("Unexpected error " + e);
    }
    try {
        tstore.unassign(Collections.singletonList(broken), null);
        Assert.fail("should not get here");
    } catch (IllegalArgumentException ex) {
    }
}