Examples with TimeoutException org.apache.hadoop.hbase.errorhandling.TimeoutException used on opensource projects

Example 1 with TimeoutException

use of org.apache.hadoop.hbase.errorhandling.TimeoutException in project hbase by apache.

the class TestZKProcedure method testMultiCohortWithMemberTimeoutDuringPrepare.

/**
   * Test a distributed commit with multiple cohort members, where one of the cohort members has a
   * timeout exception during the prepare stage.
   */
@Test
public void testMultiCohortWithMemberTimeoutDuringPrepare() throws Exception {
    String opDescription = "error injection coordination";
    String[] cohortMembers = new String[] { "one", "two", "three" };
    List<String> expected = Lists.newArrayList(cohortMembers);
    // error constants
    final int memberErrorIndex = 2;
    final CountDownLatch coordinatorReceivedErrorLatch = new CountDownLatch(1);
    // start running the coordinator and its controller
    ZooKeeperWatcher coordinatorWatcher = newZooKeeperWatcher();
    ZKProcedureCoordinator coordinatorController = new ZKProcedureCoordinator(coordinatorWatcher, opDescription, COORDINATOR_NODE_NAME);
    ThreadPoolExecutor pool = ProcedureCoordinator.defaultPool(COORDINATOR_NODE_NAME, POOL_SIZE, KEEP_ALIVE);
    ProcedureCoordinator coordinator = spy(new ProcedureCoordinator(coordinatorController, pool));
    // start a member for each node
    SubprocedureFactory subprocFactory = Mockito.mock(SubprocedureFactory.class);
    List<Pair<ProcedureMember, ZKProcedureMemberRpcs>> members = new ArrayList<>(expected.size());
    for (String member : expected) {
        ZooKeeperWatcher watcher = newZooKeeperWatcher();
        ZKProcedureMemberRpcs controller = new ZKProcedureMemberRpcs(watcher, opDescription);
        ThreadPoolExecutor pool2 = ProcedureMember.defaultPool(member, 1, KEEP_ALIVE);
        ProcedureMember mem = new ProcedureMember(controller, pool2, subprocFactory);
        members.add(new Pair<>(mem, controller));
        controller.start(member, mem);
    }
    // setup mock subprocedures
    final List<Subprocedure> cohortTasks = new ArrayList<>();
    final int[] elem = new int[1];
    for (int i = 0; i < members.size(); i++) {
        ForeignExceptionDispatcher cohortMonitor = new ForeignExceptionDispatcher();
        final ProcedureMember comms = members.get(i).getFirst();
        Subprocedure commit = Mockito.spy(new SubprocedureImpl(comms, opName, cohortMonitor, WAKE_FREQUENCY, TIMEOUT));
        // This nasty bit has one of the impls throw a TimeoutException
        Mockito.doAnswer(new Answer<Void>() {

            @Override
            public Void answer(InvocationOnMock invocation) throws Throwable {
                int index = elem[0];
                if (index == memberErrorIndex) {
                    LOG.debug("Sending error to coordinator");
                    ForeignException remoteCause = new ForeignException("TIMER", new TimeoutException("subprocTimeout", 1, 2, 0));
                    Subprocedure r = ((Subprocedure) invocation.getMock());
                    LOG.error("Remote commit failure, not propagating error:" + remoteCause);
                    comms.receiveAbortProcedure(r.getName(), remoteCause);
                    assertEquals(r.isComplete(), true);
                    // notification (which ensures that we never progress past prepare)
                    try {
                        Procedure.waitForLatch(coordinatorReceivedErrorLatch, new ForeignExceptionDispatcher(), WAKE_FREQUENCY, "coordinator received error");
                    } catch (InterruptedException e) {
                        LOG.debug("Wait for latch interrupted, done:" + (coordinatorReceivedErrorLatch.getCount() == 0));
                        // reset the interrupt status on the thread
                        Thread.currentThread().interrupt();
                    }
                }
                elem[0] = ++index;
                return null;
            }
        }).when(commit).acquireBarrier();
        cohortTasks.add(commit);
    }
    // pass out a task per member
    final AtomicInteger taskIndex = new AtomicInteger();
    Mockito.when(subprocFactory.buildSubprocedure(Mockito.eq(opName), (byte[]) Mockito.argThat(new ArrayEquals(data)))).thenAnswer(new Answer<Subprocedure>() {

        @Override
        public Subprocedure answer(InvocationOnMock invocation) throws Throwable {
            int index = taskIndex.getAndIncrement();
            Subprocedure commit = cohortTasks.get(index);
            return commit;
        }
    });
    // setup spying on the coordinator
    ForeignExceptionDispatcher coordinatorTaskErrorMonitor = Mockito.spy(new ForeignExceptionDispatcher());
    Procedure coordinatorTask = Mockito.spy(new Procedure(coordinator, coordinatorTaskErrorMonitor, WAKE_FREQUENCY, TIMEOUT, opName, data, expected));
    when(coordinator.createProcedure(any(ForeignExceptionDispatcher.class), eq(opName), eq(data), anyListOf(String.class))).thenReturn(coordinatorTask);
    // count down the error latch when we get the remote error
    Mockito.doAnswer(new Answer<Void>() {

        @Override
        public Void answer(InvocationOnMock invocation) throws Throwable {
            // pass on the error to the master
            invocation.callRealMethod();
            // then count down the got error latch
            coordinatorReceivedErrorLatch.countDown();
            return null;
        }
    }).when(coordinatorTask).receive(Mockito.any(ForeignException.class));
    // ----------------------------
    // start running the operation
    // ----------------------------
    Procedure task = coordinator.startProcedure(coordinatorTaskErrorMonitor, opName, data, expected);
    assertEquals("Didn't mock coordinator task", coordinatorTask, task);
    // wait for the task to complete
    try {
        task.waitForCompleted();
    } catch (ForeignException fe) {
    // this may get caught or may not
    }
    // -------------
    // verification
    // -------------
    // always expect prepared, never committed, and possible to have cleanup and finish (racy since
    // error case)
    waitAndVerifyProc(coordinatorTask, once, never(), once, atMost(1), true);
    verifyCohortSuccessful(expected, subprocFactory, cohortTasks, once, never(), once, once, true);
    // close all the open things
    closeAll(coordinator, coordinatorController, members);
}

Example 2 with TimeoutException

use of org.apache.hadoop.hbase.errorhandling.TimeoutException in project hbase by apache.

the class TestProcedureMember method testCoordinatorAbort.

/**
   * Fail correctly if coordinator aborts the procedure.  The subprocedure will not interrupt a
   * running {@link Subprocedure#prepare} -- prepare needs to finish first, and the the abort
   * is checked.  Thus, the {@link Subprocedure#prepare} should succeed but later get rolled back
   * via {@link Subprocedure#cleanup}.
   */
@Test(timeout = 60000)
public void testCoordinatorAbort() throws Exception {
    buildCohortMemberPair();
    // mock that another node timed out or failed to prepare
    final TimeoutException oate = new TimeoutException("bogus timeout", 1, 2, 0);
    doAnswer(new Answer<Void>() {

        @Override
        public Void answer(InvocationOnMock invocation) throws Throwable {
            // inject a remote error (this would have come from an external thread)
            spySub.cancel("bogus message", oate);
            // sleep the wake frequency since that is what we promised
            Thread.sleep(WAKE_FREQUENCY);
            return null;
        }
    }).when(spySub).waitForReachedGlobalBarrier();
    // run the operation
    // build a new operation
    Subprocedure subproc = member.createSubprocedure(op, data);
    member.submitSubprocedure(subproc);
    // if the operation doesn't die properly, then this will timeout
    member.closeAndWait(TIMEOUT);
    // make sure everything ran in order
    InOrder order = inOrder(mockMemberComms, spySub);
    order.verify(spySub).acquireBarrier();
    order.verify(mockMemberComms).sendMemberAcquired(eq(spySub));
    // Later phases not run
    order.verify(spySub, never()).insideBarrier();
    order.verify(mockMemberComms, never()).sendMemberCompleted(eq(spySub), eq(data));
    // error recovery path exercised
    order.verify(spySub).cancel(anyString(), any(Exception.class));
    order.verify(spySub).cleanup(any(Exception.class));
}

Example 3 with TimeoutException

use of org.apache.hadoop.hbase.errorhandling.TimeoutException in project hbase by apache.

the class TestProcedureMember method testMemberCommitCommsFailure.

/**
   * Handle Failures if a member's commit phase succeeds but notification to coordinator fails
   *
   * NOTE: This is the core difference that makes this different from traditional 2PC.  In true
   * 2PC the transaction is committed just before the coordinator sends commit messages to the
   * member.  Members are then responsible for reading its TX log.  This implementation actually
   * rolls back, and thus breaks the normal TX guarantees.
  */
@Test(timeout = 60000)
public void testMemberCommitCommsFailure() throws Exception {
    buildCohortMemberPair();
    final TimeoutException oate = new TimeoutException("bogus timeout", 1, 2, 0);
    doAnswer(new Answer<Void>() {

        @Override
        public Void answer(InvocationOnMock invocation) throws Throwable {
            // inject a remote error (this would have come from an external thread)
            spySub.cancel("commit comms fail", oate);
            // sleep the wake frequency since that is what we promised
            Thread.sleep(WAKE_FREQUENCY);
            return null;
        }
    }).when(mockMemberComms).sendMemberCompleted(any(Subprocedure.class), eq(data));
    // run the operation
    // build a new operation
    Subprocedure subproc = member.createSubprocedure(op, data);
    member.submitSubprocedure(subproc);
    // if the operation doesn't die properly, then this will timeout
    member.closeAndWait(TIMEOUT);
    // make sure everything ran in order
    InOrder order = inOrder(mockMemberComms, spySub);
    order.verify(spySub).acquireBarrier();
    order.verify(mockMemberComms).sendMemberAcquired(eq(spySub));
    order.verify(spySub).insideBarrier();
    order.verify(mockMemberComms).sendMemberCompleted(eq(spySub), eq(data));
    // error recovery path exercised
    order.verify(spySub).cancel(anyString(), any(Exception.class));
    order.verify(spySub).cleanup(any(Exception.class));
}