Spring reactor - eventbus在处理完一些消息后挂起

Question

我们在项目中使用reactor，事件总线进行事件驱动的方法。

我们基本上从Kafka获取消息，然后委托给reactor，如下所示。这适用于几百条消息，然后挂起。我添加了我们使用的代码并添加了跟踪。

将消息推送到反应堆的代码......

private static RingBufferWorkProcessor<TestEvent> processor =RingBufferWorkProcessor.<TestEvent> create("test", 128);

 processor.subscribe(testSubscriber);
  processor.onNext(testEvent);

TestSubscriber类： -

@Component
public class TestSubscriber implements Subscriber<TestEvent> {
    private static Log log = new Log(TestSubscriber.class);

    @Override
    public void onSubscribe(final Subscription s) {
        if (s != null) {
            s.request(Long.MAX_VALUE);
        }
    }

    @Override
    public void onNext(final TestEvent testEvent) {
        if (testEvent == null) {
            return;
        }
        getRootReactor().notify(testEvent.getType().getName(), Event.wrap(testEvent));
    }

    @Override
    public void onError(final Throwable t) {
        if (t != null) {
            log.error(t.getMessage());
        }
    }

    @Override
    public void onComplete() {
        log.info("TestSubscriber is done.");
    }
}


public static EventBus getRootReactor() {
        if (rootReactor == null) {
            rootReactor = EventBus.create(Environment.get(), Environment.workDispatcher());
        }
        return rootReactor;
    }

追踪1： -

"pool-9-thread-1" prio=5 tid=63 TIMED_WAITING
    at sun.misc.Unsafe.park(Native Method)
    at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:338)
    at reactor.jarjar.com.lmax.disruptor.MultiProducerSequencer.next(MultiProducerSequencer.java:136)
    at reactor.jarjar.com.lmax.disruptor.MultiProducerSequencer.next(MultiProducerSequencer.java:105)
    at reactor.jarjar.com.lmax.disruptor.RingBuffer.next(RingBuffer.java:246)
    at reactor.core.dispatch.WorkQueueDispatcher.allocateTask(WorkQueueDispatcher.java:172)
    at reactor.core.dispatch.AbstractLifecycleDispatcher.dispatch(AbstractLifecycleDispatcher.java:118)
    at reactor.bus.EventBus.notify(EventBus.java:368)
       Local Variable: reactor.bus.Event#2

追踪2： -

"workQueueDispatcher-3" daemon prio=5 tid=42 TIMED_WAITING
    at sun.misc.Unsafe.park(Native Method)
    at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:338)
    at reactor.jarjar.com.lmax.disruptor.MultiProducerSequencer.next(MultiProducerSequencer.java:136)
    at reactor.jarjar.com.lmax.disruptor.MultiProducerSequencer.next(MultiProducerSequencer.java:105)
    at reactor.jarjar.com.lmax.disruptor.RingBuffer.next(RingBuffer.java:246)
    at reactor.core.dispatch.WorkQueueDispatcher.allocateTask(WorkQueueDispatcher.java:172)
    at reactor.core.dispatch.MultiThreadDispatcher.allocateRecursiveTask(MultiThreadDispatcher.java:59)
    at reactor.core.dispatch.AbstractLifecycleDispatcher.dispatch(AbstractLifecycleDispatcher.java:116)
    at reactor.bus.EventBus.notify(EventBus.java:368)
       Local Variable: reactor.bus.Event#6

我检查了反应堆代码所在的位置，并且没有任何线索。

@Override
112    public long More ...next(int n)
113    {
114        if (n < 1)
115        {
116            throw new IllegalArgumentException("n must be > 0");
117        }
118
119        long current;
120        long next;
121
122        do
123        {
124            current = cursor.get();
125            next = current + n;
126
127            long wrapPoint = next - bufferSize;
128            long cachedGatingSequence = gatingSequenceCache.get();
129
130            if (wrapPoint > cachedGatingSequence || cachedGatingSequence > current)
131            {
132                long gatingSequence = Util.getMinimumSequence(gatingSequences, current);
133
134                if (wrapPoint > gatingSequence)
135                {
136                    LockSupport.parkNanos(1); // TODO, should we spin based on the wait strategy?
137                    continue;
138                }
139
140                gatingSequenceCache.set(gatingSequence);
141            }
142            else if (cursor.compareAndSet(current, next))
143            {
144                break;
145            }
146        }
147        while (true);
148
149        return next;
150    }

谢谢，