Question

版本：rocketmq-全4.1.0-孵育

我们发送msg 1000 QPS，同步发送，但抛出异常： -

[TIMEOUT_CLEAN_QUEUE]经纪人忙，启动流量控制一段时间

有相关代码：

while (true) {
        try {
            if (!this.brokerController.getSendThreadPoolQueue().isEmpty()) {
                final Runnable runnable = this.brokerController.getSendThreadPoolQueue().peek();
                if (null == runnable) {
                    break;
                }
                final RequestTask rt = castRunnable(runnable);
                if (rt == null || rt.isStopRun()) {
                    break;
                }

                final long behind = System.currentTimeMillis() - rt.getCreateTimestamp();
                if (behind >= this.brokerController.getBrokerConfig().getWaitTimeMillsInSendQueue()) {
                    if (this.brokerController.getSendThreadPoolQueue().remove(runnable)) {
                        rt.setStopRun(true);
                        rt.returnResponse(RemotingSysResponseCode.SYSTEM_BUSY, String.format("[TIMEOUT_CLEAN_QUEUE]broker busy, start flow control for a while, period in queue: %sms, size of queue: %d", behind, this.brokerController.getSendThreadPoolQueue().size()));
                    }
                } else {
                    break;
                }
            } else {
                break;
            }
        } catch (Throwable ignored) {
        }
    }
}

我发现broker的sendMessageThreadPoolNums的默认值是1，

/**
 * thread numbers for send message thread pool, since spin lock will be used by default since 4.0.x, the default value is 1.
 */
private int sendMessageThreadPoolNums = 1; //16 + Runtime.getRuntime().availableProcessors() * 4;
private int pullMessageThreadPoolNums = 16 + Runtime.getRuntime().availableProcessors() * 2;

但以前的版本不是1，如果我配置sendMessageThreadPoolNums = 100，可以解决这个问题吗？它将导致与默认值不同的东西。感谢

Answer 1

简短回答：

你有两个选择：

将sendMessageThreadPoolNums设置为较小的数字，例如1，这是4.1.x版之后的默认值。并且，仍然是useReentrantLockWhenPutMessage = false的默认值，这是在4.1.x之后引入的

如果您需要使用大量线程来处理发送消息，那么最好使用useReentrantLockWhenPutMessage = true

 sendMessageThreadPoolNums=1 
 useReentrantLockWhenPutMessage=false

rocketmq抛出异常＆＃34; [TIMEOUT_CLEAN_QUEUE]经纪人忙，启动流量控制一段时间＆＃34;

1 个答案: