Question

我正在使用jmx监控ActiveMQ。我使用以下链接获取ActiveMQ摘要

http://localhost:8161/api/jolokia/read/org.apache.activemq:type=Broker,brokerName=localhost/BrokerId,TotalEnqueueCount,TotalDequeueCount,TotalConsumerCount,TotalMessageCount,TotalConnectionsCount,TotalConsumerCount,TotalProducerCount,MemoryLimit,MemoryPercentUsage,StoreLimit,StorePercentUsage

时间T1

我正在向ActiveMQ发送100条消息，但我没有将任何消息出列。现在总结如下所示

{
    "timestamp" : 1437996108,
    "status" : 200,
    "request" : {
        "mbean" : "org.apache.activemq:brokerName=localhost,type=Broker",
        "attribute" : ["BrokerId", "TotalEnqueueCount", "TotalDequeueCount", "TotalConsumerCount", "TotalMessageCount", "TotalConnectionsCount", "TotalConsumerCount", "TotalProducerCount", "MemoryLimit", "MemoryPercentUsage", "StoreLimit", "StorePercentUsage"],
        "type" : "read"
    },
    "value" : {
        "BrokerId" : "ID:synclap5489-54676-1437995895016-0:1",
        "TotalConnectionsCount" : 100,
        "TotalDequeueCount" : 0,
        "StoreLimit" : 104857600,
        "TotalConsumerCount" : 0,
        "TotalMessageCount" : 100,
        "TotalProducerCount" : 0,
        "MemoryPercentUsage" : 0,
        "StorePercentUsage" : 9,
        "TotalEnqueueCount" : 100,
        "MemoryLimit" : 739717939
    }
}

并停止ActiveMQ服务器，使100条消息处于Pending状态。

时间T2

再次启动ActiveMQ并发送另外100条消息，但不发送任何消息。现在Json数据如下所示

{
    "timestamp" : 1437996721,
    "status" : 200,
    "request" : {
        "mbean" : "org.apache.activemq:brokerName=localhost,type=Broker",
        "attribute" : ["BrokerId", "TotalEnqueueCount", "TotalDequeueCount", "TotalConsumerCount", "TotalMessageCount", "TotalConnectionsCount", "TotalConsumerCount", "TotalProducerCount", "MemoryLimit", "MemoryPercentUsage", "StoreLimit", "StorePercentUsage"],
        "type" : "read"
    },
    "value" : {
        "BrokerId" : "ID:synclap5489-55183-1437996657303-0:1",
        "TotalConnectionsCount" : 100,
        "TotalDequeueCount" : 0,
        "StoreLimit" : 104857600,
        "TotalConsumerCount" : 0,
        "TotalMessageCount" : 100,
        "TotalProducerCount" : 0,
        "MemoryPercentUsage" : 0,
        "StorePercentUsage" : 9,
        "TotalEnqueueCount" : 100,
        "MemoryLimit" : 739717939
    }
}

Deque之后

将所有消息出列后，我将获得如下所示的json数据

{
    "timestamp" : 1437997015,
    "status" : 200,
    "request" : {
        "mbean" : "org.apache.activemq:brokerName=localhost,type=Broker",
        "attribute" : ["BrokerId", "TotalEnqueueCount", "TotalDequeueCount", "TotalConsumerCount", "TotalMessageCount", "TotalConnectionsCount", "TotalConsumerCount", "TotalProducerCount", "MemoryLimit", "MemoryPercentUsage", "StoreLimit", "StorePercentUsage"],
        "type" : "read"
    },
    "value" : {
        "BrokerId" : "ID:synclap5489-55183-1437996657303-0:1",
        "TotalConnectionsCount" : 101,
        "TotalDequeueCount" : 200,
        "StoreLimit" : 104857600,
        "TotalConsumerCount" : 1,
        "TotalMessageCount" : -100,
        "TotalProducerCount" : 0,
        "MemoryPercentUsage" : 0,
        "StorePercentUsage" : 9,
        "TotalEnqueueCount" : 100,
        "MemoryLimit" : 739717939
    }
}

TotalDequeueCount更改为200 TotalEnqueueCount保持100 TotalMessageCount更改-100。

我的问题：

为什么我在TotalMessageCount中获得负值？

为什么只有在使用待处理消息重新启动代理时才会发生这种情况？

如何解决这个问题？

ActiveMQ待处理消息中的负计数

0 个答案: