No provider available for the service com.alibaba.

異常信息以下：

ERROR [DubboMonitorSendTimer-thread-1] -  [DUBBO] Unexpected error occur at send statistic, cause: Failed to invoke the method collect in the service com.alibaba.dubbo.monitor.MonitorService. No provider available for the service com.alibaba.dubbo.monitor.MonitorService from registry 192.168.1.17:2181 on the consumer 192.168.5.18 using the dubbo version 2.5.4. Please check if the providers have been started and registered., dubbo version: 2.5.4, current host: 192.168.5.18
com.alibaba.dubbo.rpc.RpcException: Failed to invoke the method collect in the service com.alibaba.dubbo.monitor.MonitorService. No provider available for the service com.alibaba.dubbo.monitor.MonitorService from registry 192.168.1.17:2181 on the consumer 192.168.5.18 using the dubbo version 2.5.4. Please check if the providers have been started and registered.
    at com.alibaba.dubbo.rpc.cluster.support.AbstractClusterInvoker.checkInvokers(AbstractClusterInvoker.java:246)
    at com.alibaba.dubbo.rpc.cluster.support.FailoverClusterInvoker.doInvoke(FailoverClusterInvoker.java:55)
    at com.alibaba.dubbo.rpc.cluster.support.AbstractClusterInvoker.invoke(AbstractClusterInvoker.java:227)
    at com.alibaba.dubbo.rpc.cluster.support.wrapper.MockClusterInvoker.invoke(MockClusterInvoker.java:72)
    at com.alibaba.dubbo.rpc.proxy.InvokerInvocationHandler.invoke(InvokerInvocationHandler.java:52)
    at com.alibaba.dubbo.common.bytecode.proxy3.collect(proxy3.java)
    at com.alibaba.dubbo.monitor.dubbo.DubboMonitor.send(DubboMonitor.java:113)
    at com.alibaba.dubbo.monitor.dubbo.DubboMonitor$1.run(DubboMonitor.java:70)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
    at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:304)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:178)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
    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)

這是由於沒有啓動Dubbo的dubbo-monitor監控項目致使的。咱們能夠置之不理，若是看着不爽的話，就把dubbo-monitor工程下載下來，而後啓動起來便可。（附件中是我下載的，能夠按照下述方法安裝便可http://pan.baidu.com/s/1bnLwBRT）

若是是window ，進入\dubbo-monitor-simple-2.5.3\conf 修改裏面的dubbo.properties 文件：

dubbo.registry.address = xxx 

更改成本身得dubbo-minitor註冊路徑便可

 而後啓動 start.bat,啓動完成後，在瀏覽器上能夠訪問http://localhost:8081/