RocketMq broker硬盘空间不足的问题

1、问题来源：

压测环境是两台namesever，两台broker master，分别是10.255.255.142（broker-b）和10.255.255.151(broker-a)，从监控上看151从2015-3-13后就没收到过消息。

测试环境两天master，总共的TPS是4000左右，消息大小是2K，

 

2、寻找问题点：

1、在eclipse环境连接压测环境，发现消息只发送到broker-b上，没有发送到broker-a上面。

2、怀疑是producer没有连接上broker-a，用netstat命令查看broker-a的连接，producer连接上了broker-a

3、怀疑producer从nameserver没有获取到broker-a上面的消息队列，使用MessageQueueSelector发现nameserver返回了broker-a的消息队列。

4、只往broker-a的消息队列上发送消息，报如下错误

com.alibaba.rocketmq.client.exception.MQBrokerException: CODE: 14  DESC: service not available now, maybe disk full, CL:  0.87 CQ:  0.87 INDEX:  0.87, maybe your broker machine memory too small.
For more information, please visit the url, https://github.com/alibaba/RocketMQ/issues/64
    at com.alibaba.rocketmq.client.impl.MQClientAPIImpl.processSendResponse(MQClientAPIImpl.java:492)
    at com.alibaba.rocketmq.client.impl.MQClientAPIImpl.sendMessageSync(MQClientAPIImpl.java:398)
    at com.alibaba.rocketmq.client.impl.MQClientAPIImpl.sendMessage(MQClientAPIImpl.java:379)
    at com.alibaba.rocketmq.client.impl.producer.DefaultMQProducerImpl.sendKernelImpl(DefaultMQProducerImpl.java:698)
    at com.alibaba.rocketmq.client.impl.producer.DefaultMQProducerImpl.sendSelectImpl(DefaultMQProducerImpl.java:877)
    at com.alibaba.rocketmq.client.impl.producer.DefaultMQProducerImpl.send(DefaultMQProducerImpl.java:851)
    at com.alibaba.rocketmq.client.producer.DefaultMQProducer.send(DefaultMQProducer.java:163)
    at com.ruishenh.rocketmq.example.Producer.main(Producer.java:78)

5、发现时硬盘不足，去broker-a上查看硬盘，硬盘还是有空间的

6、查看RocketMQ的源码，知道出现问题的地方：

DefaultMessageStore中的public PutMessageResult putMessage(MessageExtBrokerInner msg)

if (!this.runningFlags.isWriteable()) {
    long value = this.printTimes.getAndIncrement();
    if ((value % 50000) == 0) {
        log.warn("message store is not writeable, so putMessage is forbidden "
                + this.runningFlags.getFlagBits());
    }

    return new PutMessageResult(PutMessageStatus.SERVICE_NOT_AVAILABLE, null);
}
else {
    this.printTimes.set(0);
}

RunningFlags类中的方法

public boolean isWriteable() {
    if ((this.flagBits & (NotWriteableBit | WriteLogicsQueueErrorBit | DiskFullBit | WriteIndexFileErrorBit)) == 0) {
        return true;
    }

    return false;
}

7、基本判断是硬盘不足了，让测试人员把释放一部分的硬盘空间，当硬盘空闲空间达到4G以上broker-a就能正常工作了，出问题的时候空闲的硬盘空间是2.5G

 

http://blog.csdn.net/xuhaifang_9856/article/details/44309123