Examples with TransientQueryQueue io.confluent.ksql.query.TransientQueryQueue used on opensource projects

Example 1 with TransientQueryQueue

use of io.confluent.ksql.query.TransientQueryQueue in project ksql by confluentinc.

the class PushRouting method connectToHosts.

/**
 * Connects to all of the hosts provided.
 * @return A future for a PushConnectionsHandle, which can be used to terminate connections.
 */
@SuppressWarnings("checkstyle:ParameterNumber")
private CompletableFuture<PushConnectionsHandle> connectToHosts(final ServiceContext serviceContext, final PushPhysicalPlanManager pushPhysicalPlanManager, final ConfiguredStatement<Query> statement, final Collection<KsqlNode> hosts, final LogicalSchema outputSchema, final TransientQueryQueue transientQueryQueue, final PushConnectionsHandle pushConnectionsHandle, final boolean dynamicallyAddedNode, final Optional<ScalablePushQueryMetrics> scalablePushQueryMetrics, final Set<KsqlNode> catchupHosts, final PushRoutingOptions pushRoutingOptions, final String thisHostName) {
    final Map<KsqlNode, CompletableFuture<RoutingResult>> futureMap = new LinkedHashMap<>();
    for (final KsqlNode node : hosts) {
        pushConnectionsHandle.add(node, new RoutingResult(RoutingResultStatus.IN_PROGRESS, () -> {
        }));
        final CompletableFuture<Void> callback = new CompletableFuture<>();
        callback.handle((v, t) -> {
            if (t == null) {
                pushConnectionsHandle.get(node).ifPresent(result -> {
                    result.close();
                    result.updateStatus(RoutingResultStatus.COMPLETE);
                });
                LOG.info("Host {} completed request {}.", node, pushPhysicalPlanManager.getQueryId());
            } else if (t instanceof GapFoundException) {
                pushConnectionsHandle.get(node).ifPresent(result -> {
                    result.close();
                    result.updateStatus(RoutingResultStatus.OFFSET_GAP_FOUND);
                });
            } else {
                pushConnectionsHandle.completeExceptionally(t);
            }
            return null;
        });
        futureMap.put(node, executeOrRouteQuery(node, statement, serviceContext, pushPhysicalPlanManager, outputSchema, transientQueryQueue, callback, scalablePushQueryMetrics, pushConnectionsHandle.getOffsetsTracker(), catchupHosts.contains(node), pushRoutingOptions, thisHostName));
    }
    return CompletableFuture.allOf(futureMap.values().toArray(new CompletableFuture[0])).thenApply(v -> {
        for (final KsqlNode node : hosts) {
            final CompletableFuture<RoutingResult> future = futureMap.get(node);
            final RoutingResult routingResult = future.join();
            pushConnectionsHandle.add(node, routingResult);
        }
        return pushConnectionsHandle;
    }).exceptionally(t -> {
        final KsqlNode node = futureMap.entrySet().stream().filter(e -> e.getValue().isCompletedExceptionally()).map(Entry::getKey).findFirst().orElse(null);
        for (KsqlNode n : hosts) {
            final CompletableFuture<RoutingResult> future = futureMap.get(n);
            // Take whatever completed exceptionally and mark it as failed
            if (future.isCompletedExceptionally()) {
                pushConnectionsHandle.get(n).ifPresent(result -> result.updateStatus(RoutingResultStatus.FAILED));
            } else {
                final RoutingResult routingResult = future.join();
                pushConnectionsHandle.add(node, routingResult);
            }
        }
        LOG.warn("Error routing query {} id {} to host {} at timestamp {} with exception {}", statement.getStatementText(), pushPhysicalPlanManager.getQueryId(), node, System.currentTimeMillis(), t.getCause());
        // retries in that case and don't fail the original request.
        if (!dynamicallyAddedNode) {
            pushConnectionsHandle.completeExceptionally(new KsqlException(String.format("Unable to execute push query \"%s\". %s", statement.getStatementText(), t.getCause().getMessage())));
        }
        return pushConnectionsHandle;
    }).exceptionally(t -> {
        LOG.error("Unexpected error handing exception", t);
        return pushConnectionsHandle;
    });
}

Example 2 with TransientQueryQueue

use of io.confluent.ksql.query.TransientQueryQueue in project ksql by confluentinc.

the class PushRouting method checkForNewHosts.

private void checkForNewHosts(final ServiceContext serviceContext, final PushPhysicalPlanManager pushPhysicalPlanManager, final ConfiguredStatement<Query> statement, final LogicalSchema outputSchema, final TransientQueryQueue transientQueryQueue, final PushConnectionsHandle pushConnectionsHandle, final Optional<ScalablePushQueryMetrics> scalablePushQueryMetrics, final PushRoutingOptions pushRoutingOptions, final String thisHostName) {
    VertxUtils.checkContext(pushPhysicalPlanManager.getContext());
    if (pushConnectionsHandle.isClosed()) {
        return;
    }
    final Set<KsqlNode> updatedHosts = registryToNodes.apply(pushPhysicalPlanManager.getScalablePushRegistry());
    final Set<KsqlNode> hosts = pushConnectionsHandle.getActiveHosts();
    final Set<KsqlNode> newHosts = Sets.difference(updatedHosts, hosts).stream().filter(node -> pushConnectionsHandle.get(node).map(routingResult -> routingResult.getStatus() != RoutingResultStatus.IN_PROGRESS).orElse(true)).collect(Collectors.toSet());
    final Set<KsqlNode> removedHosts = Sets.difference(hosts, updatedHosts);
    if (newHosts.size() > 0) {
        LOG.info("Dynamically adding new hosts {} for {}", newHosts, pushPhysicalPlanManager.getQueryId());
        final Set<KsqlNode> catchupHosts = newHosts.stream().filter(node -> pushConnectionsHandle.get(node).map(routingResult -> routingResult.getStatus() == RoutingResultStatus.OFFSET_GAP_FOUND).orElse(false)).collect(Collectors.toSet());
        connectToHosts(serviceContext, pushPhysicalPlanManager, statement, newHosts, outputSchema, transientQueryQueue, pushConnectionsHandle, true, scalablePushQueryMetrics, catchupHosts, pushRoutingOptions, thisHostName);
    }
    if (removedHosts.size() > 0) {
        LOG.info("Dynamically removing hosts {} for {}", removedHosts, pushPhysicalPlanManager.getQueryId());
        for (final KsqlNode node : removedHosts) {
            final RoutingResult result = pushConnectionsHandle.remove(node);
            result.close();
            result.updateStatus(RoutingResultStatus.REMOVED);
        }
    }
    pushPhysicalPlanManager.getContext().owner().setTimer(clusterCheckInterval, timerId -> checkForNewHosts(serviceContext, pushPhysicalPlanManager, statement, outputSchema, transientQueryQueue, pushConnectionsHandle, scalablePushQueryMetrics, pushRoutingOptions, thisHostName));
}

Example 3 with TransientQueryQueue

use of io.confluent.ksql.query.TransientQueryQueue in project ksql by confluentinc.

the class EngineExecutor method executeScalablePushQuery.

ScalablePushQueryMetadata executeScalablePushQuery(final ImmutableAnalysis analysis, final ConfiguredStatement<Query> statement, final PushRouting pushRouting, final PushRoutingOptions pushRoutingOptions, final QueryPlannerOptions queryPlannerOptions, final Context context, final Optional<ScalablePushQueryMetrics> scalablePushQueryMetrics) {
    final SessionConfig sessionConfig = statement.getSessionConfig();
    // If we ever change how many hops a request can do, we'll need to update this for correct
    // metrics.
    final RoutingNodeType routingNodeType = pushRoutingOptions.getHasBeenForwarded() ? RoutingNodeType.REMOTE_NODE : RoutingNodeType.SOURCE_NODE;
    PushPhysicalPlan plan = null;
    try {
        final KsqlConfig ksqlConfig = sessionConfig.getConfig(false);
        final LogicalPlanNode logicalPlan = buildAndValidateLogicalPlan(statement, analysis, ksqlConfig, queryPlannerOptions, true);
        final PushPhysicalPlanCreator pushPhysicalPlanCreator = (offsetRange, catchupConsumerGroup) -> buildScalablePushPhysicalPlan(logicalPlan, analysis, context, offsetRange, catchupConsumerGroup);
        final Optional<PushOffsetRange> offsetRange = pushRoutingOptions.getContinuationToken().map(PushOffsetRange::deserialize);
        final Optional<String> catchupConsumerGroup = pushRoutingOptions.getCatchupConsumerGroup();
        final PushPhysicalPlanManager physicalPlanManager = new PushPhysicalPlanManager(pushPhysicalPlanCreator, catchupConsumerGroup, offsetRange);
        final PushPhysicalPlan physicalPlan = physicalPlanManager.getPhysicalPlan();
        plan = physicalPlan;
        final TransientQueryQueue transientQueryQueue = new TransientQueryQueue(analysis.getLimitClause());
        final PushQueryMetadata.ResultType resultType = physicalPlan.getScalablePushRegistry().isTable() ? physicalPlan.getScalablePushRegistry().isWindowed() ? ResultType.WINDOWED_TABLE : ResultType.TABLE : ResultType.STREAM;
        final PushQueryQueuePopulator populator = () -> pushRouting.handlePushQuery(serviceContext, physicalPlanManager, statement, pushRoutingOptions, physicalPlan.getOutputSchema(), transientQueryQueue, scalablePushQueryMetrics, offsetRange);
        final PushQueryPreparer preparer = () -> pushRouting.preparePushQuery(physicalPlanManager, statement, pushRoutingOptions);
        final ScalablePushQueryMetadata metadata = new ScalablePushQueryMetadata(physicalPlan.getOutputSchema(), physicalPlan.getQueryId(), transientQueryQueue, scalablePushQueryMetrics, resultType, populator, preparer, physicalPlan.getSourceType(), routingNodeType, physicalPlan::getRowsReadFromDataSource);
        return metadata;
    } catch (final Exception e) {
        if (plan == null) {
            scalablePushQueryMetrics.ifPresent(m -> m.recordErrorRateForNoResult(1));
        } else {
            final PushPhysicalPlan pushPhysicalPlan = plan;
            scalablePushQueryMetrics.ifPresent(metrics -> metrics.recordErrorRate(1, pushPhysicalPlan.getSourceType(), routingNodeType));
        }
        final String stmtLower = statement.getStatementText().toLowerCase(Locale.ROOT);
        final String messageLower = e.getMessage().toLowerCase(Locale.ROOT);
        final String stackLower = Throwables.getStackTraceAsString(e).toLowerCase(Locale.ROOT);
        // the contents of the query
        if (messageLower.contains(stmtLower) || stackLower.contains(stmtLower)) {
            final StackTraceElement loc = Iterables.getLast(Throwables.getCausalChain(e)).getStackTrace()[0];
            LOG.error("Failure to execute push query V2 {} {}, not logging the error message since it " + "contains the query string, which may contain sensitive information." + " If you see this LOG message, please submit a GitHub ticket and" + " we will scrub the statement text from the error at {}", pushRoutingOptions.debugString(), queryPlannerOptions.debugString(), loc);
        } else {
            LOG.error("Failure to execute push query V2. {} {}", pushRoutingOptions.debugString(), queryPlannerOptions.debugString(), e);
        }
        LOG.debug("Failed push query V2 text {}, {}", statement.getStatementText(), e);
        throw new KsqlStatementException(e.getMessage() == null ? "Server Error" + Arrays.toString(e.getStackTrace()) : e.getMessage(), statement.getStatementText(), e);
    }
}

Example 4 with TransientQueryQueue

use of io.confluent.ksql.query.TransientQueryQueue in project ksql by confluentinc.

the class PushRoutingTest method setUp.

@Before
public void setUp() {
    vertx = Vertx.vertx();
    context = vertx.getOrCreateContext();
    when(statement.getStatementText()).thenReturn("SELECT * FROM STREAM EMIT CHANGES");
    when(statement.getSessionConfig()).thenReturn(sessionConfig);
    when(sessionConfig.getOverrides()).thenReturn(ImmutableMap.of());
    when(serviceContext.getKsqlClient()).thenReturn(simpleKsqlClient);
    when(pushPhysicalPlanManager.getScalablePushRegistry()).thenReturn(scalablePushRegistry);
    when(pushPhysicalPlanManager.getContext()).thenReturn(context);
    when(pushPhysicalPlanManager.closeable()).thenReturn(() -> {
    });
    when(pushPhysicalPlanManager.getCatchupConsumerGroupId()).thenReturn(CONSUMER_GROUP);
    when(scalablePushRegistry.getLocator()).thenReturn(locator);
    when(locator.locate()).thenReturn(ImmutableList.of(ksqlNodeLocal, ksqlNodeRemote));
    when(ksqlNodeLocal.location()).thenReturn(URI.create("http://localhost:8088"));
    when(ksqlNodeLocal.isLocal()).thenReturn(true);
    when(ksqlNodeRemote.location()).thenReturn(URI.create("http://remote:8088"));
    when(ksqlNodeRemote.isLocal()).thenReturn(false);
    when(ksqlNodeRemote2.location()).thenReturn(URI.create("http://remote2:8088"));
    when(ksqlNodeRemote2.isLocal()).thenReturn(false);
    when(pushRoutingOptions.getHasBeenForwarded()).thenReturn(false);
    when(pushRoutingOptions.alosEnabled()).thenReturn(true);
    localPublisher = new TestLocalPublisher(context);
    remotePublisher = new TestRemotePublisher(context);
    when(pushPhysicalPlanManager.execute()).thenReturn(localPublisher);
    when(simpleKsqlClient.makeQueryRequestStreamed(any(), any(), any(), any())).thenReturn(createFuture(RestResponse.successful(200, remotePublisher)));
    transientQueryQueue = new TransientQueryQueue(OptionalInt.empty());
}

Example 5 with TransientQueryQueue

use of io.confluent.ksql.query.TransientQueryQueue in project ksql by confluentinc.

the class PushRoutingTest method shouldFail_hitRequestLimitLocal.

@Test
public void shouldFail_hitRequestLimitLocal() throws ExecutionException, InterruptedException {
    // Given:
    transientQueryQueue = new TransientQueryQueue(OptionalInt.empty(), 1, 100);
    when(pushRoutingOptions.getHasBeenForwarded()).thenReturn(true);
    final PushRouting routing = new PushRouting();
    BufferedPublisher<QueryRow> localPublisher = new BufferedPublisher<>(context);
    when(pushPhysicalPlanManager.execute()).thenReturn(localPublisher);
    // When:
    final PushConnectionsHandle handle = handlePushRouting(routing);
    context.runOnContext(v -> {
        localPublisher.accept(LOCAL_ROW1);
        localPublisher.accept(LOCAL_ROW2);
    });
    // Then:
    Set<List<?>> rows = waitOnRows(1);
    handle.close();
    assertThat(rows.contains(LOCAL_ROW1.value().values()), is(true));
    assertThat(handle.getError().getMessage(), containsString("Hit limit of request queue"));
}