Examples with Page io.trino.spi.Page used on opensource projects

Example 51 with Page

use of io.trino.spi.Page in project trino by trinodb.

the class TestSqlTaskExecution method testComplex.

@Test(dataProvider = "executionStrategies", timeOut = 20_000)
public void testComplex(PipelineExecutionStrategy executionStrategy) throws Exception {
    ScheduledExecutorService taskNotificationExecutor = newScheduledThreadPool(10, threadsNamed("task-notification-%s"));
    ScheduledExecutorService driverYieldExecutor = newScheduledThreadPool(2, threadsNamed("driver-yield-%s"));
    TaskExecutor taskExecutor = new TaskExecutor(5, 10, 3, 4, Ticker.systemTicker());
    taskExecutor.start();
    try {
        TaskStateMachine taskStateMachine = new TaskStateMachine(TASK_ID, taskNotificationExecutor);
        PartitionedOutputBuffer outputBuffer = newTestingOutputBuffer(taskNotificationExecutor);
        OutputBufferConsumer outputBufferConsumer = new OutputBufferConsumer(outputBuffer, OUTPUT_BUFFER_ID);
        // test initialization: complex test with 4 pipelines
        // Take a task with the following set of pipelines for example:
        // 
        // pipeline 0        pipeline 1       pipeline 2    pipeline 3    ... pipeline id
        // partitioned      unpartitioned     partitioned  unpartitioned  ... partitioned/unpartitioned pipeline
        // grouped           grouped          grouped      ungrouped    ... execution strategy (in grouped test)
        // ungrouped         ungrouped        ungrouped     ungrouped    ... execution strategy (in ungrouped test)
        // 
        // TaskOutput-0
        // |
        // CrossJoin-C  ................................... Build-C
        // |                                               |
        // CrossJoin-A  ..... Build-A                       Values-3
        // |                |
        // Scan-0         CrossJoin-B  ....  Build-B
        // (effectively ExchangeSink)    |
        // |               Scan-2
        // Values-1
        // (1 row)
        // 
        // CrossJoin operator here has the same lifecycle behavior as a real cross/hash-join, and produces
        // the correct number of rows, but doesn't actually produce a cross-join for simplicity.
        // 
        // A single task can never have all 4 combinations: partitioned/unpartitioned x grouped/ungrouped.
        // * In the case of ungrouped test, this test covers driver with
        // 1) split lifecycle (partitioned ungrouped)
        // 2) task lifecycle (unpartitioned ungrouped)
        // These are the only 2 possible pipeline execution strategy a task can have if the task has ungrouped execution strategy.
        // * In the case of grouped test, this covers:
        // 1) split lifecycle (partitioned grouped)
        // 2) driver group lifecycle (unpartitioned grouped)
        // 3) task lifecycle (unpartitioned ungrouped)
        // These are the only 3 possible pipeline execution strategy a task can have if the task has grouped execution strategy.
        // 
        // The following behaviors are tested:
        // * DriverFactory are marked as noMoreDriver/Operator for particular lifespans as soon as they can be:
        // * immediately, if the pipeline has task lifecycle (ungrouped and unpartitioned).
        // * when SplitAssignment containing the lifespan is encountered, if the pipeline has driver group lifecycle (grouped and unpartitioned).
        // * when SplitAssignment indicate that no more splits will be produced for the plan node (and plan nodes that schedule before it
        // due to phased scheduling) and lifespan combination, if the pipeline has split lifecycle (partitioned).
        // * DriverFactory are marked as noMoreDriver/Operator as soon as they can be:
        // * immediately, if the pipeline has task lifecycle (ungrouped and unpartitioned).
        // * when SplitAssignment indicate that will no more splits, otherwise.
        // * Driver groups are marked as completed as soon as they should be:
        // * when there are no active driver, and all DriverFactory for the lifespan (across all pipelines) are marked as completed.
        // * Rows are produced as soon as they should be:
        // * streams data through as soon as the build side is ready, for CrossJoin
        // * streams data through, otherwise.
        PlanNodeId scan0NodeId = new PlanNodeId("scan-0");
        PlanNodeId values1NodeId = new PlanNodeId("values-1");
        PlanNodeId scan2NodeId = new PlanNodeId("scan-2");
        PlanNodeId values3NodeId = new PlanNodeId("values-3");
        PlanNodeId joinANodeId = new PlanNodeId("join-a");
        PlanNodeId joinBNodeId = new PlanNodeId("join-b");
        PlanNodeId joinCNodeId = new PlanNodeId("join-c");
        BuildStates buildStatesA = new BuildStates(executionStrategy);
        BuildStates buildStatesB = new BuildStates(executionStrategy);
        BuildStates buildStatesC = new BuildStates(UNGROUPED_EXECUTION);
        TestingScanOperatorFactory scanOperatorFactory0 = new TestingScanOperatorFactory(1, scan0NodeId, ImmutableList.of(VARCHAR));
        ValuesOperatorFactory valuesOperatorFactory1 = new ValuesOperatorFactory(101, values1NodeId, ImmutableList.of(new Page(createStringsBlock("multiplier1"))));
        TestingScanOperatorFactory scanOperatorFactory2 = new TestingScanOperatorFactory(201, scan2NodeId, ImmutableList.of(VARCHAR));
        ValuesOperatorFactory valuesOperatorFactory3 = new ValuesOperatorFactory(301, values3NodeId, ImmutableList.of(new Page(createStringsBlock("x", "y", "multiplier3"))));
        TaskOutputOperatorFactory taskOutputOperatorFactory = new TaskOutputOperatorFactory(4, joinCNodeId, outputBuffer, Function.identity(), new PagesSerdeFactory(new TestingBlockEncodingSerde(), false));
        TestingCrossJoinOperatorFactory joinOperatorFactoryA = new TestingCrossJoinOperatorFactory(2, joinANodeId, buildStatesA);
        TestingCrossJoinOperatorFactory joinOperatorFactoryB = new TestingCrossJoinOperatorFactory(102, joinBNodeId, buildStatesB);
        TestingCrossJoinOperatorFactory joinOperatorFactoryC = new TestingCrossJoinOperatorFactory(3, joinCNodeId, buildStatesC);
        TestingBuildOperatorFactory buildOperatorFactoryA = new TestingBuildOperatorFactory(103, joinANodeId, buildStatesA);
        TestingBuildOperatorFactory buildOperatorFactoryB = new TestingBuildOperatorFactory(202, joinBNodeId, buildStatesB);
        TestingBuildOperatorFactory buildOperatorFactoryC = new TestingBuildOperatorFactory(302, joinCNodeId, buildStatesC);
        LocalExecutionPlan localExecutionPlan = new LocalExecutionPlan(ImmutableList.of(new DriverFactory(0, true, true, ImmutableList.of(scanOperatorFactory0, joinOperatorFactoryA, joinOperatorFactoryC, taskOutputOperatorFactory), OptionalInt.empty(), executionStrategy), new DriverFactory(1, false, false, ImmutableList.of(valuesOperatorFactory1, joinOperatorFactoryB, buildOperatorFactoryA), OptionalInt.empty(), executionStrategy), new DriverFactory(2, true, false, ImmutableList.of(scanOperatorFactory2, buildOperatorFactoryB), OptionalInt.empty(), executionStrategy), new DriverFactory(3, false, false, ImmutableList.of(valuesOperatorFactory3, buildOperatorFactoryC), OptionalInt.empty(), UNGROUPED_EXECUTION)), ImmutableList.of(scan2NodeId, scan0NodeId), executionStrategy == GROUPED_EXECUTION ? StageExecutionDescriptor.fixedLifespanScheduleGroupedExecution(ImmutableList.of(scan0NodeId, scan2NodeId)) : StageExecutionDescriptor.ungroupedExecution());
        TaskContext taskContext = newTestingTaskContext(taskNotificationExecutor, driverYieldExecutor, taskStateMachine);
        SqlTaskExecution sqlTaskExecution = SqlTaskExecution.createSqlTaskExecution(taskStateMachine, taskContext, outputBuffer, localExecutionPlan, taskExecutor, taskNotificationExecutor, createTestSplitMonitor());
        // 
        // test body
        assertEquals(taskStateMachine.getState(), RUNNING);
        switch(executionStrategy) {
            case UNGROUPED_EXECUTION:
                // assert that pipeline 1 and pipeline 3 will have no more drivers
                // (Unpartitioned ungrouped pipelines can have all driver instance created up front.)
                waitUntilEquals(joinOperatorFactoryB::isOverallNoMoreOperators, true, ASSERT_WAIT_TIMEOUT);
                waitUntilEquals(buildOperatorFactoryA::isOverallNoMoreOperators, true, ASSERT_WAIT_TIMEOUT);
                waitUntilEquals(buildOperatorFactoryC::isOverallNoMoreOperators, true, ASSERT_WAIT_TIMEOUT);
                // add assignment for pipeline 2, and mark as no more splits
                sqlTaskExecution.addSplitAssignments(ImmutableList.of(new SplitAssignment(scan2NodeId, ImmutableSet.of(newScheduledSplit(0, scan2NodeId, Lifespan.taskWide(), 100000, 1), newScheduledSplit(1, scan2NodeId, Lifespan.taskWide(), 300000, 2)), false)));
                sqlTaskExecution.addSplitAssignments(ImmutableList.of(new SplitAssignment(scan2NodeId, ImmutableSet.of(newScheduledSplit(2, scan2NodeId, Lifespan.taskWide(), 300000, 2)), true)));
                // assert that pipeline 2 will have no more drivers
                waitUntilEquals(scanOperatorFactory2::isOverallNoMoreOperators, true, ASSERT_WAIT_TIMEOUT);
                waitUntilEquals(buildOperatorFactoryB::isOverallNoMoreOperators, true, ASSERT_WAIT_TIMEOUT);
                // pause operator execution to make sure that
                // * operatorFactory will be closed even though operator can't execute
                // * completedDriverGroups will NOT include the newly scheduled driver group while pause is in place
                scanOperatorFactory0.getPauser().pause();
                // add assignment for pipeline 0, mark as no more splits
                sqlTaskExecution.addSplitAssignments(ImmutableList.of(new SplitAssignment(scan0NodeId, ImmutableSet.of(newScheduledSplit(3, scan0NodeId, Lifespan.taskWide(), 400000, 100)), true)));
                // assert that pipeline 0 will have no more drivers
                waitUntilEquals(scanOperatorFactory0::isOverallNoMoreOperators, true, ASSERT_WAIT_TIMEOUT);
                waitUntilEquals(joinOperatorFactoryA::isOverallNoMoreOperators, true, ASSERT_WAIT_TIMEOUT);
                waitUntilEquals(joinOperatorFactoryC::isOverallNoMoreOperators, true, ASSERT_WAIT_TIMEOUT);
                // assert that no DriverGroup is fully completed
                assertEquals(taskContext.getCompletedDriverGroups(), ImmutableSet.of());
                // resume operator execution
                scanOperatorFactory0.getPauser().resume();
                // assert that task result is produced
                outputBufferConsumer.consume(100 * 5 * 3, ASSERT_WAIT_TIMEOUT);
                outputBufferConsumer.assertBufferComplete(ASSERT_WAIT_TIMEOUT);
                break;
            case GROUPED_EXECUTION:
                // assert that pipeline 3 will have no more drivers
                // (Unpartitioned ungrouped pipelines can have all driver instances created up front.)
                waitUntilEquals(buildOperatorFactoryC::isOverallNoMoreOperators, true, ASSERT_WAIT_TIMEOUT);
                // add assignment for pipeline 2 driver group 3, and mark driver group 3 as no more splits
                sqlTaskExecution.addSplitAssignments(ImmutableList.of(new SplitAssignment(scan2NodeId, ImmutableSet.of(newScheduledSplit(0, scan2NodeId, Lifespan.driverGroup(3), 0, 1), newScheduledSplit(1, scan2NodeId, Lifespan.driverGroup(3), 100000, 2)), false)));
                // assert that pipeline 1 driver group [3] will have no more drivers
                waitUntilEquals(joinOperatorFactoryB::getDriverGroupsWithNoMoreOperators, ImmutableSet.of(Lifespan.driverGroup(3)), ASSERT_WAIT_TIMEOUT);
                waitUntilEquals(buildOperatorFactoryA::getDriverGroupsWithNoMoreOperators, ImmutableSet.of(Lifespan.driverGroup(3)), ASSERT_WAIT_TIMEOUT);
                sqlTaskExecution.addSplitAssignments(ImmutableList.of(new SplitAssignment(scan2NodeId, ImmutableSet.of(newScheduledSplit(2, scan2NodeId, Lifespan.driverGroup(3), 200000, 2)), ImmutableSet.of(Lifespan.driverGroup(3)), false)));
                // assert that pipeline 2 driver group [3] will have no more drivers
                waitUntilEquals(scanOperatorFactory2::getDriverGroupsWithNoMoreOperators, ImmutableSet.of(Lifespan.driverGroup(3)), ASSERT_WAIT_TIMEOUT);
                waitUntilEquals(buildOperatorFactoryB::getDriverGroupsWithNoMoreOperators, ImmutableSet.of(Lifespan.driverGroup(3)), ASSERT_WAIT_TIMEOUT);
                // pause operator execution to make sure that
                // * completedDriverGroups will NOT include the newly scheduled driver group while pause is in place
                scanOperatorFactory0.getPauser().pause();
                // add assignment for pipeline 0 driver group 3, and mark driver group 3 as no more splits
                sqlTaskExecution.addSplitAssignments(ImmutableList.of(new SplitAssignment(scan0NodeId, ImmutableSet.of(newScheduledSplit(3, scan0NodeId, Lifespan.driverGroup(3), 300000, 10)), ImmutableSet.of(Lifespan.driverGroup(3)), false)));
                // assert that pipeline 0 driver group [3] will have no more drivers
                waitUntilEquals(scanOperatorFactory0::getDriverGroupsWithNoMoreOperators, ImmutableSet.of(Lifespan.driverGroup(3)), ASSERT_WAIT_TIMEOUT);
                waitUntilEquals(joinOperatorFactoryA::getDriverGroupsWithNoMoreOperators, ImmutableSet.of(Lifespan.driverGroup(3)), ASSERT_WAIT_TIMEOUT);
                waitUntilEquals(joinOperatorFactoryC::getDriverGroupsWithNoMoreOperators, ImmutableSet.of(Lifespan.driverGroup(3)), ASSERT_WAIT_TIMEOUT);
                // assert that no DriverGroup is fully completed
                assertEquals(taskContext.getCompletedDriverGroups(), ImmutableSet.of());
                // resume operator execution
                scanOperatorFactory0.getPauser().resume();
                // assert that partial task result is produced
                outputBufferConsumer.consume(10 * 5 * 3, ASSERT_WAIT_TIMEOUT);
                // assert that driver group [3] is fully completed
                waitUntilEquals(taskContext::getCompletedDriverGroups, ImmutableSet.of(Lifespan.driverGroup(3)), ASSERT_WAIT_TIMEOUT);
                // add assignment for pipeline 2 driver group 7, and mark pipeline as no more splits
                sqlTaskExecution.addSplitAssignments(ImmutableList.of(new SplitAssignment(scan2NodeId, ImmutableSet.of(newScheduledSplit(4, scan2NodeId, Lifespan.driverGroup(7), 400000, 2)), ImmutableSet.of(Lifespan.driverGroup(7)), true)));
                // assert that pipeline 2 driver group [3, 7] will have no more drivers
                waitUntilEquals(scanOperatorFactory2::getDriverGroupsWithNoMoreOperators, ImmutableSet.of(Lifespan.driverGroup(3), Lifespan.driverGroup(7)), ASSERT_WAIT_TIMEOUT);
                waitUntilEquals(buildOperatorFactoryB::getDriverGroupsWithNoMoreOperators, ImmutableSet.of(Lifespan.driverGroup(3), Lifespan.driverGroup(7)), ASSERT_WAIT_TIMEOUT);
                // pause operator execution to make sure that
                // * operatorFactory will be closed even though operator can't execute
                // * completedDriverGroups will NOT include the newly scheduled driver group while pause is in place
                scanOperatorFactory0.getPauser().pause();
                // add assignment for pipeline 0 driver group 7, mark pipeline as no more splits
                sqlTaskExecution.addSplitAssignments(ImmutableList.of(new SplitAssignment(scan0NodeId, ImmutableSet.of(newScheduledSplit(5, scan0NodeId, Lifespan.driverGroup(7), 500000, 1000)), ImmutableSet.of(Lifespan.driverGroup(7)), true)));
                // assert that pipeline 0 driver group [3, 7] will have no more drivers
                waitUntilEquals(scanOperatorFactory0::getDriverGroupsWithNoMoreOperators, ImmutableSet.of(Lifespan.driverGroup(3), Lifespan.driverGroup(7)), ASSERT_WAIT_TIMEOUT);
                waitUntilEquals(joinOperatorFactoryA::getDriverGroupsWithNoMoreOperators, ImmutableSet.of(Lifespan.driverGroup(3), Lifespan.driverGroup(7)), ASSERT_WAIT_TIMEOUT);
                waitUntilEquals(joinOperatorFactoryC::getDriverGroupsWithNoMoreOperators, ImmutableSet.of(Lifespan.driverGroup(3), Lifespan.driverGroup(7)), ASSERT_WAIT_TIMEOUT);
                // assert that pipeline 0 will have no more drivers
                waitUntilEquals(scanOperatorFactory0::isOverallNoMoreOperators, true, ASSERT_WAIT_TIMEOUT);
                waitUntilEquals(joinOperatorFactoryA::isOverallNoMoreOperators, true, ASSERT_WAIT_TIMEOUT);
                waitUntilEquals(joinOperatorFactoryC::isOverallNoMoreOperators, true, ASSERT_WAIT_TIMEOUT);
                // assert that pipeline 1 driver group [3, 7] will have no more drivers
                waitUntilEquals(joinOperatorFactoryB::getDriverGroupsWithNoMoreOperators, ImmutableSet.of(Lifespan.driverGroup(3), Lifespan.driverGroup(7)), ASSERT_WAIT_TIMEOUT);
                waitUntilEquals(buildOperatorFactoryA::getDriverGroupsWithNoMoreOperators, ImmutableSet.of(Lifespan.driverGroup(3), Lifespan.driverGroup(7)), ASSERT_WAIT_TIMEOUT);
                // assert that pipeline 1 will have no more drivers
                // (Unpartitioned grouped pipelines will have no more driver instances when there can be no more driver groups.)
                waitUntilEquals(joinOperatorFactoryB::isOverallNoMoreOperators, true, ASSERT_WAIT_TIMEOUT);
                waitUntilEquals(buildOperatorFactoryA::isOverallNoMoreOperators, true, ASSERT_WAIT_TIMEOUT);
                // assert that pipeline 2 will have no more drivers
                // note: One could argue that this should have happened as soon as pipeline 2 driver group 7 is marked as noMoreSplits.
                // This is not how SqlTaskExecution is currently implemented. And such a delay in closing DriverFactory does not matter much.
                waitUntilEquals(scanOperatorFactory2::isOverallNoMoreOperators, true, ASSERT_WAIT_TIMEOUT);
                waitUntilEquals(buildOperatorFactoryB::isOverallNoMoreOperators, true, ASSERT_WAIT_TIMEOUT);
                // assert that driver group [3] (but not 7) is fully completed
                assertEquals(taskContext.getCompletedDriverGroups(), ImmutableSet.of(Lifespan.driverGroup(3)));
                // resume operator execution
                scanOperatorFactory0.getPauser().resume();
                // assert that partial task result is produced
                outputBufferConsumer.consume(1000 * 2 * 3, ASSERT_WAIT_TIMEOUT);
                outputBufferConsumer.assertBufferComplete(ASSERT_WAIT_TIMEOUT);
                // assert that driver group [3, 7] is fully completed
                waitUntilEquals(taskContext::getCompletedDriverGroups, ImmutableSet.of(Lifespan.driverGroup(3), Lifespan.driverGroup(7)), ASSERT_WAIT_TIMEOUT);
                break;
            default:
                throw new UnsupportedOperationException();
        }
        assertEquals(taskStateMachine.getStateChange(RUNNING).get(10, SECONDS), FLUSHING);
        // complete the task by calling abort on it
        outputBufferConsumer.abort();
        assertEquals(taskStateMachine.getStateChange(FLUSHING).get(10, SECONDS), FINISHED);
    } finally {
        taskExecutor.stop();
        taskNotificationExecutor.shutdownNow();
        driverYieldExecutor.shutdown();
    }
}

Example 52 with Page

use of io.trino.spi.Page in project trino by trinodb.

the class BufferTestUtils method assertBufferResultEquals.

static void assertBufferResultEquals(List<? extends Type> types, BufferResult actual, BufferResult expected) {
    assertEquals(actual.getSerializedPages().size(), expected.getSerializedPages().size(), "page count");
    assertEquals(actual.getToken(), expected.getToken(), "token");
    for (int i = 0; i < actual.getSerializedPages().size(); i++) {
        Page actualPage = PAGES_SERDE.deserialize(actual.getSerializedPages().get(i));
        Page expectedPage = PAGES_SERDE.deserialize(expected.getSerializedPages().get(i));
        assertEquals(actualPage.getChannelCount(), expectedPage.getChannelCount());
        PageAssertions.assertPageEquals(types, actualPage, expectedPage);
    }
    assertEquals(actual.isBufferComplete(), expected.isBufferComplete(), "buffer complete");
}

Example 53 with Page

use of io.trino.spi.Page in project trino by trinodb.

the class TestBroadcastOutputBuffer method testSharedBufferBlocking.

@Test
public void testSharedBufferBlocking() {
    SettableFuture<Void> blockedFuture = SettableFuture.create();
    MockMemoryReservationHandler reservationHandler = new MockMemoryReservationHandler(blockedFuture);
    AggregatedMemoryContext memoryContext = newRootAggregatedMemoryContext(reservationHandler, 0L);
    Page page = createPage(1);
    long pageSize = serializePage(page).getRetainedSize();
    // create a buffer that can only hold two pages
    BroadcastOutputBuffer buffer = createBroadcastBuffer(createInitialEmptyOutputBuffers(BROADCAST), DataSize.ofBytes(pageSize * 2), memoryContext, directExecutor());
    OutputBufferMemoryManager memoryManager = buffer.getMemoryManager();
    // adding the first page will block as no memory is available (MockMemoryReservationHandler will return a future that is not done)
    enqueuePage(buffer, page);
    // more memory is available
    blockedFuture.set(null);
    memoryManager.onMemoryAvailable();
    assertTrue(memoryManager.getBufferBlockedFuture().isDone(), "buffer shouldn't be blocked");
    // we should be able to add one more page after more memory is available
    addPage(buffer, page);
    // the buffer is full now
    enqueuePage(buffer, page);
}

Example 54 with Page

use of io.trino.spi.Page in project trino by trinodb.

the class TestBroadcastOutputBuffer method testSharedBufferBlockingNoBlockOnFull.

@Test
public void testSharedBufferBlockingNoBlockOnFull() {
    SettableFuture<Void> blockedFuture = SettableFuture.create();
    MockMemoryReservationHandler reservationHandler = new MockMemoryReservationHandler(blockedFuture);
    AggregatedMemoryContext memoryContext = newRootAggregatedMemoryContext(reservationHandler, 0L);
    Page page = createPage(1);
    long pageSize = serializePage(page).getRetainedSize();
    // create a buffer that can only hold two pages
    BroadcastOutputBuffer buffer = createBroadcastBuffer(createInitialEmptyOutputBuffers(BROADCAST), DataSize.ofBytes(pageSize * 2), memoryContext, directExecutor());
    OutputBufferMemoryManager memoryManager = buffer.getMemoryManager();
    memoryManager.setNoBlockOnFull();
    // even if setNoBlockOnFull() is called the buffer should block on memory when we add the first page
    // as no memory is available (MockMemoryReservationHandler will return a future that is not done)
    enqueuePage(buffer, page);
    // more memory is available
    blockedFuture.set(null);
    memoryManager.onMemoryAvailable();
    assertTrue(memoryManager.getBufferBlockedFuture().isDone(), "buffer shouldn't be blocked");
    // we should be able to add one more page after more memory is available
    addPage(buffer, page);
    // the buffer is full now, but setNoBlockOnFull() is called so the buffer shouldn't block
    addPage(buffer, page);
}

Example 55 with Page

use of io.trino.spi.Page in project trino by trinodb.

the class TestBroadcastOutputBuffer method testSharedBufferBlocking2.

@Test
public void testSharedBufferBlocking2() {
    // start with a complete future
    SettableFuture<Void> blockedFuture = SettableFuture.create();
    blockedFuture.set(null);
    MockMemoryReservationHandler reservationHandler = new MockMemoryReservationHandler(blockedFuture);
    AggregatedMemoryContext memoryContext = newRootAggregatedMemoryContext(reservationHandler, 0L);
    Page page = createPage(1);
    long pageSize = serializePage(page).getRetainedSize();
    // create a buffer that can only hold two pages
    BroadcastOutputBuffer buffer = createBroadcastBuffer(createInitialEmptyOutputBuffers(BROADCAST), DataSize.ofBytes(pageSize * 2), memoryContext, directExecutor());
    OutputBufferMemoryManager memoryManager = buffer.getMemoryManager();
    // add two pages to fill up the buffer (memory is available)
    addPage(buffer, page);
    addPage(buffer, page);
    // fill up the memory pool
    blockedFuture = SettableFuture.create();
    reservationHandler.updateBlockedFuture(blockedFuture);
    // allocate one more byte to make the buffer full
    memoryManager.updateMemoryUsage(1L);
    // more memory is available
    blockedFuture.set(null);
    memoryManager.onMemoryAvailable();
    // memoryManager should still return a blocked future as the buffer is still full
    assertFalse(memoryManager.getBufferBlockedFuture().isDone(), "buffer should be blocked");
    // remove all pages from the memory manager and the 1 byte that we added above
    memoryManager.updateMemoryUsage(-pageSize * 2 - 1);
    // now we have both buffer space and memory available, so memoryManager shouldn't be blocked
    assertTrue(memoryManager.getBufferBlockedFuture().isDone(), "buffer shouldn't be blocked");
    // we should be able to add two pages after more memory is available
    addPage(buffer, page);
    addPage(buffer, page);
    // the buffer is full now
    enqueuePage(buffer, page);
}