Aerospike Java 异步库似乎卡住了

Question

我正在使用 aeropike 异步客户端执行 udf。客户端已初始化为：-

    try {
        asyncClientPolicy.maxThreads = 40;
        asyncClientPolicy.asyncMaxCommands = 20;
        asyncClientPolicy.maxSocketIdle = 13;
        asyncClientPolicy.asyncMaxCommandAction = MaxCommandAction.BLOCK;
        asyncClientPolicy.asyncSelectorThreads = 7;
        asyncClientPolicy.asyncTaskThreadPool = Executors.newFixedThreadPool(20, new ThreadFactory() {
            public final Thread newThread(Runnable runnable) {
                Thread thread = new Thread(runnable);
                thread.setDaemon(true);
                return thread;
            }
        });
    }

所以我有 20 个线程来处理回调。过了一会儿，我看到我的程序没有任何进展，表明 deadlock/starvation。 Jstack 给我以下结果：-

java.lang.Thread.State: WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x000000064048f338> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
    at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2043)
    at java.util.concurrent.ArrayBlockingQueue.take(ArrayBlockingQueue.java:374)
    at com.aerospike.client.async.AsyncCluster$BlockBufferQueue.getByteBuffer(AsyncCluster.java:114)
    at com.aerospike.client.async.AsyncCluster.getByteBuffer(AsyncCluster.java:68)
    at com.aerospike.client.async.AsyncCommand.execute(AsyncCommand.java:59)
    at com.aerospike.client.async.AsyncClient.execute(AsyncClient.java:949)
    at main.java.labs.RuleEngineAerospikeConnection.updatePositiveSegmentsUDF(RuleEngineAerospikeConnection.java:217)
    at main.java.labs.Segment$ProductChecker.onSuccess(Segment.java:346)
    at com.aerospike.client.async.AsyncRead.onSuccess(AsyncRead.java:149)
    at com.aerospike.client.async.AsyncCommand.finish(AsyncCommand.java:293)
    at com.aerospike.client.async.AsyncSingleCommand.read(AsyncSingleCommand.java:59)
    at com.aerospike.client.async.AsyncCommand.run(AsyncCommand.java:261)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:745)

我正好有 20 个线程在等待 execute 命令。我是否在设置上做错了什么，因为我希望客户端 return，即使我的 UDF 中有任何异常，如果出现无限循环会怎样？它会导致这种行为吗？

Answer 1

如果不查看源代码，很难说出是什么导致了死锁。您的 AsyncClientPolicy 看起来足够了。

无论如何，旧的 AsyncClient class 自 version 4 以来已经过时了。 AerospikeClient class 现在包括新的异步方法，其执行速度必须比旧的 AsyncClient 快。新的异步方法还支持 Netty 事件循环，并且始终运行在非阻塞模式下。

Aerospike Java 异步库似乎卡住了

Aerospike Java Async library seems stuck

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aerospike