Examples with TabletState org.apache.accumulo.core.metadata.TabletState used on opensource projects

Example 1 with TabletState

use of org.apache.accumulo.core.metadata.TabletState in project accumulo by apache.

the class FindOfflineTablets method checkTablets.

private static int checkTablets(ServerContext context, Iterator<TabletLocationState> scanner, LiveTServerSet tservers) {
    int offline = 0;
    while (scanner.hasNext() && !System.out.checkError()) {
        TabletLocationState locationState = scanner.next();
        TabletState state = locationState.getState(tservers.getCurrentServers());
        if (state != null && state != TabletState.HOSTED && context.getTableManager().getTableState(locationState.extent.tableId()) != TableState.OFFLINE) {
            System.out.println(locationState + " is " + state + "  #walogs:" + locationState.walogs.size());
            offline++;
        }
    }
    return offline;
}

Example 2 with TabletState

use of org.apache.accumulo.core.metadata.TabletState in project accumulo by apache.

the class CleanUp method isReady.

@Override
public long isReady(long tid, Manager manager) throws Exception {
    if (!manager.hasCycled(creationTime)) {
        return 50;
    }
    boolean done = true;
    Range tableRange = new KeyExtent(tableId, null, null).toMetaRange();
    Scanner scanner = manager.getContext().createScanner(MetadataTable.NAME, Authorizations.EMPTY);
    MetaDataTableScanner.configureScanner(scanner, manager);
    scanner.setRange(tableRange);
    for (Entry<Key, Value> entry : scanner) {
        TabletLocationState locationState = MetaDataTableScanner.createTabletLocationState(entry.getKey(), entry.getValue());
        TabletState state = locationState.getState(manager.onlineTabletServers());
        if (!state.equals(TabletState.UNASSIGNED)) {
            // This code will even wait on tablets that are assigned to dead tablets servers. This is
            // intentional because the manager may make metadata writes for these tablets. See #587
            log.debug("Still waiting for table({}) to be deleted; Target tablet state: UNASSIGNED, " + "Current tablet state: {}, locationState: {}", tableId, state, locationState);
            done = false;
            break;
        }
    }
    if (!done)
        return 50;
    return 0;
}

Example 3 with TabletState

use of org.apache.accumulo.core.metadata.TabletState in project accumulo by apache.

the class TabletMetadataTest method testLocationStates.

@Test
public void testLocationStates() {
    KeyExtent extent = new KeyExtent(TableId.of("5"), new Text("df"), new Text("da"));
    TServerInstance ser1 = new TServerInstance(HostAndPort.fromParts("server1", 8555), "s001");
    TServerInstance ser2 = new TServerInstance(HostAndPort.fromParts("server2", 8111), "s002");
    TServerInstance deadSer = new TServerInstance(HostAndPort.fromParts("server3", 8000), "s003");
    Set<TServerInstance> tservers = new LinkedHashSet<>();
    tservers.add(ser1);
    tservers.add(ser2);
    EnumSet<ColumnType> colsToFetch = EnumSet.of(LOCATION, LAST, SUSPEND);
    // test assigned
    Mutation mutation = TabletColumnFamily.createPrevRowMutation(extent);
    mutation.at().family(FutureLocationColumnFamily.NAME).qualifier(ser1.getSession()).put(ser1.getHostPort());
    SortedMap<Key, Value> rowMap = toRowMap(mutation);
    TabletMetadata tm = TabletMetadata.convertRow(rowMap.entrySet().iterator(), colsToFetch, false);
    TabletState state = tm.getTabletState(tservers);
    assertEquals(TabletState.ASSIGNED, state);
    assertEquals(ser1, tm.getLocation());
    assertEquals(ser1.getSession(), tm.getLocation().getSession());
    assertEquals(LocationType.FUTURE, tm.getLocation().getType());
    assertFalse(tm.hasCurrent());
    // test hosted
    mutation = TabletColumnFamily.createPrevRowMutation(extent);
    mutation.at().family(CurrentLocationColumnFamily.NAME).qualifier(ser2.getSession()).put(ser2.getHostPort());
    rowMap = toRowMap(mutation);
    tm = TabletMetadata.convertRow(rowMap.entrySet().iterator(), colsToFetch, false);
    assertEquals(TabletState.HOSTED, tm.getTabletState(tservers));
    assertEquals(ser2, tm.getLocation());
    assertEquals(ser2.getSession(), tm.getLocation().getSession());
    assertEquals(LocationType.CURRENT, tm.getLocation().getType());
    assertTrue(tm.hasCurrent());
    // test ASSIGNED_TO_DEAD_SERVER
    mutation = TabletColumnFamily.createPrevRowMutation(extent);
    mutation.at().family(CurrentLocationColumnFamily.NAME).qualifier(deadSer.getSession()).put(deadSer.getHostPort());
    rowMap = toRowMap(mutation);
    tm = TabletMetadata.convertRow(rowMap.entrySet().iterator(), colsToFetch, false);
    assertEquals(TabletState.ASSIGNED_TO_DEAD_SERVER, tm.getTabletState(tservers));
    assertEquals(deadSer, tm.getLocation());
    assertEquals(deadSer.getSession(), tm.getLocation().getSession());
    assertEquals(LocationType.CURRENT, tm.getLocation().getType());
    assertTrue(tm.hasCurrent());
    // test UNASSIGNED
    mutation = TabletColumnFamily.createPrevRowMutation(extent);
    rowMap = toRowMap(mutation);
    tm = TabletMetadata.convertRow(rowMap.entrySet().iterator(), colsToFetch, false);
    assertEquals(TabletState.UNASSIGNED, tm.getTabletState(tservers));
    assertNull(tm.getLocation());
    assertFalse(tm.hasCurrent());
    // test SUSPENDED
    mutation = TabletColumnFamily.createPrevRowMutation(extent);
    mutation.at().family(SuspendLocationColumn.SUSPEND_COLUMN.getColumnFamily()).qualifier(SuspendLocationColumn.SUSPEND_COLUMN.getColumnQualifier()).put(SuspendingTServer.toValue(ser2, 1000L));
    rowMap = toRowMap(mutation);
    tm = TabletMetadata.convertRow(rowMap.entrySet().iterator(), colsToFetch, false);
    assertEquals(TabletState.SUSPENDED, tm.getTabletState(tservers));
    assertEquals(1000L, tm.getSuspend().suspensionTime);
    assertEquals(ser2.getHostAndPort(), tm.getSuspend().server);
    assertNull(tm.getLocation());
    assertFalse(tm.hasCurrent());
}

Example 4 with TabletState

use of org.apache.accumulo.core.metadata.TabletState in project accumulo by apache.

the class TabletGroupWatcher method run.

@Override
public void run() {
    int[] oldCounts = new int[TabletState.values().length];
    EventCoordinator.Listener eventListener = this.manager.nextEvent.getListener();
    WalStateManager wals = new WalStateManager(manager.getContext());
    while (manager.stillManager()) {
        // slow things down a little, otherwise we spam the logs when there are many wake-up events
        sleepUninterruptibly(100, TimeUnit.MILLISECONDS);
        int totalUnloaded = 0;
        int unloaded = 0;
        ClosableIterator<TabletLocationState> iter = null;
        try {
            Map<TableId, MergeStats> mergeStatsCache = new HashMap<>();
            Map<TableId, MergeStats> currentMerges = new HashMap<>();
            for (MergeInfo merge : manager.merges()) {
                if (merge.getExtent() != null) {
                    currentMerges.put(merge.getExtent().tableId(), new MergeStats(merge));
                }
            }
            // Get the current status for the current list of tservers
            SortedMap<TServerInstance, TabletServerStatus> currentTServers = new TreeMap<>();
            for (TServerInstance entry : manager.tserverSet.getCurrentServers()) {
                currentTServers.put(entry, manager.tserverStatus.get(entry));
            }
            if (currentTServers.isEmpty()) {
                eventListener.waitForEvents(Manager.TIME_TO_WAIT_BETWEEN_SCANS);
                synchronized (this) {
                    lastScanServers = Collections.emptySortedSet();
                }
                continue;
            }
            TabletLists tLists = new TabletLists(manager, currentTServers);
            ManagerState managerState = manager.getManagerState();
            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;
                }
                // ignore entries for tables that do not exist in zookeeper
                if (manager.getTableManager().getTableState(tls.extent.tableId()) == null)
                    continue;
                // Don't overwhelm the tablet servers with work
                if (tLists.unassigned.size() + unloaded > Manager.MAX_TSERVER_WORK_CHUNK * currentTServers.size()) {
                    flushChanges(tLists, wals);
                    tLists.reset();
                    unloaded = 0;
                    eventListener.waitForEvents(Manager.TIME_TO_WAIT_BETWEEN_SCANS);
                }
                TableId tableId = tls.extent.tableId();
                TableConfiguration tableConf = manager.getContext().getTableConfiguration(tableId);
                MergeStats mergeStats = mergeStatsCache.computeIfAbsent(tableId, k -> {
                    var mStats = currentMerges.get(k);
                    return mStats != null ? mStats : new MergeStats(new MergeInfo());
                });
                TabletGoalState goal = manager.getGoalState(tls, mergeStats.getMergeInfo());
                TServerInstance location = tls.getLocation();
                TabletState state = tls.getState(currentTServers.keySet());
                TabletLogger.missassigned(tls.extent, goal.toString(), state.toString(), tls.future, tls.current, tls.walogs.size());
                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) && manager.serversToShutdown.equals(currentTServers.keySet())) {
                    if (dependentWatcher != null && dependentWatcher.assignedOrHosted() > 0) {
                        goal = TabletGoalState.HOSTED;
                    }
                }
                if (goal == TabletGoalState.HOSTED) {
                    if ((state != TabletState.HOSTED && !tls.walogs.isEmpty()) && manager.recoveryManager.recoverLogs(tls.extent, tls.walogs))
                        continue;
                    switch(state) {
                        case HOSTED:
                            if (location.equals(manager.migrations.get(tls.extent)))
                                manager.migrations.remove(tls.extent);
                            break;
                        case ASSIGNED_TO_DEAD_SERVER:
                            hostDeadTablet(tLists, tls, location, wals);
                            break;
                        case SUSPENDED:
                            hostSuspendedTablet(tLists, tls, location, tableConf);
                            break;
                        case UNASSIGNED:
                            hostUnassignedTablet(tLists, tls.extent, location);
                            break;
                        case ASSIGNED:
                            // Send another reminder
                            tLists.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.
                            tLists.suspendedToGoneServers.add(tls);
                            cancelOfflineTableMigrations(tls.extent);
                            break;
                        case UNASSIGNED:
                            cancelOfflineTableMigrations(tls.extent);
                            break;
                        case ASSIGNED_TO_DEAD_SERVER:
                            unassignDeadTablet(tLists, tls, wals);
                            break;
                        case HOSTED:
                            TServerConnection client = manager.tserverSet.getConnection(location);
                            if (client != null) {
                                client.unloadTablet(manager.managerLock, tls.extent, goal.howUnload(), manager.getSteadyTime());
                                unloaded++;
                                totalUnloaded++;
                            } else {
                                Manager.log.warn("Could not connect to server {}", location);
                            }
                            break;
                        case ASSIGNED:
                            break;
                    }
                }
                counts[state.ordinal()]++;
            }
            flushChanges(tLists, wals);
            // provide stats after flushing changes to avoid race conditions w/ delete table
            stats.end(managerState);
            // Report changes
            for (TabletState state : TabletState.values()) {
                int i = state.ordinal();
                if (counts[i] > 0 && counts[i] != oldCounts[i]) {
                    manager.nextEvent.event("[%s]: %d tablets are %s", store.name(), counts[i], state.name());
                }
            }
            Manager.log.debug(String.format("[%s]: scan time %.2f seconds", store.name(), stats.getScanTime() / 1000.));
            oldCounts = counts;
            if (totalUnloaded > 0) {
                manager.nextEvent.event("[%s]: %d tablets unloaded", store.name(), totalUnloaded);
            }
            updateMergeState(mergeStatsCache);
            synchronized (this) {
                lastScanServers = ImmutableSortedSet.copyOf(currentTServers.keySet());
            }
            if (manager.tserverSet.getCurrentServers().equals(currentTServers.keySet())) {
                Manager.log.debug(String.format("[%s] sleeping for %.2f seconds", store.name(), Manager.TIME_TO_WAIT_BETWEEN_SCANS / 1000.));
                eventListener.waitForEvents(Manager.TIME_TO_WAIT_BETWEEN_SCANS);
            } else {
                Manager.log.info("Detected change in current tserver set, re-running state machine.");
            }
        } catch (Exception ex) {
            Manager.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(Manager.WAIT_BETWEEN_ERRORS, TimeUnit.MILLISECONDS);
            }
        } finally {
            if (iter != null) {
                try {
                    iter.close();
                } catch (IOException ex) {
                    Manager.log.warn("Error closing TabletLocationState iterator: " + ex, ex);
                }
            }
        }
    }
}