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

Example 31 with TabletLocationState

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

the class TabletLocationStateTest method testGetState_Assigned.

@Test
public void testGetState_Assigned() throws Exception {
    Set<TServerInstance> liveServers = new java.util.HashSet<>();
    liveServers.add(future);
    tls = new TabletLocationState(keyExtent, future, null, last, null, walogs, true);
    assertEquals(TabletState.ASSIGNED, tls.getState(liveServers));
}

Example 32 with TabletLocationState

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

the class TabletLocationStateTest method testConstruction_FutureAndCurrent.

@Test
public void testConstruction_FutureAndCurrent() {
    expect(keyExtent.toMetaRow()).andReturn(new Text("entry"));
    replay(keyExtent);
    var e = assertThrows(TabletLocationState.BadLocationStateException.class, () -> new TabletLocationState(keyExtent, future, current, last, null, walogs, true));
    assertEquals(new Text("entry"), e.getEncodedEndRow());
}

Example 33 with TabletLocationState

use of org.apache.accumulo.core.metadata.TabletLocationState 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);
                }
            }
        }
    }
}

Example 34 with TabletLocationState

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

the class MergeStats method verifyMergeConsistency.

private boolean verifyMergeConsistency(AccumuloClient accumuloClient, CurrentState manager) throws TableNotFoundException, IOException {
    MergeStats verify = new MergeStats(info);
    KeyExtent extent = info.getExtent();
    Scanner scanner = accumuloClient.createScanner(extent.isMeta() ? RootTable.NAME : MetadataTable.NAME, Authorizations.EMPTY);
    MetaDataTableScanner.configureScanner(scanner, manager);
    Text start = extent.prevEndRow();
    if (start == null) {
        start = new Text();
    }
    TableId tableId = extent.tableId();
    Text first = TabletsSection.encodeRow(tableId, start);
    Range range = new Range(first, false, null, true);
    scanner.setRange(range.clip(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.tableId().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) {
            // the start of the merge range
            if (tls.extent.prevEndRow() != null && tls.extent.prevEndRow().compareTo(start) > 0) {
                log.debug("failing consistency: prev row is too high {}", start);
                return false;
            }
            if (tls.getState(manager.onlineTabletServers()) != TabletState.UNASSIGNED && tls.getState(manager.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(manager.onlineTabletServers()), tls.chopped, !tls.walogs.isEmpty());
        // stop when we've seen the tablet just beyond our range
        if (tls.extent.prevEndRow() != null && extent.endRow() != null && tls.extent.prevEndRow().compareTo(extent.endRow()) > 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 35 with TabletLocationState

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

the class RootTabletStateStoreTest method testRootTabletStateStore.

@Test
public void testRootTabletStateStore() throws DistributedStoreException {
    ZooTabletStateStore tstore = new ZooTabletStateStore(new TestAmple());
    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(TableId.of("0"), null, null);
    final var assignmentList = List.of(new Assignment(notRoot, server));
    assertThrows(IllegalArgumentException.class, () -> tstore.setLocations(assignmentList));
    assertThrows(IllegalArgumentException.class, () -> tstore.setFutureLocations(assignmentList));
    try {
        TabletLocationState broken = new TabletLocationState(notRoot, server, null, null, null, null, false);
        final var assignmentList1 = List.of(broken);
        assertThrows(IllegalArgumentException.class, () -> tstore.unassign(assignmentList1, null));
    } catch (BadLocationStateException e) {
        fail("Unexpected error " + e);
    }
}