为什么CloudWatch API getMetricStatisticsInRegion与jclouds一起使用会引发UndeclaredThrowableException？

我试图让CloudWatch的指标，但出现以下错误：为什么CloudWatch API getMetricStatisticsInRegion与jclouds一起使用会引发UndeclaredThrowableException？

Exception in thread "main" java.lang.reflect.UndeclaredThrowableException 
    at $Proxy85.getMetricStatisticsInRegion(Unknown Source) 
    at GetStats.main(GetStats.java:73) 
Caused by: java.util.concurrent.ExecutionException: task submitted from the following trace 
    at org.jclouds.concurrent.config.ExecutorServiceModule$DescribedFuture.ensureCauseHasSubmissionTrace(ExecutorServiceModule.java:272) 
    at org.jclouds.concurrent.config.ExecutorServiceModule$DescribedFuture.get(ExecutorServiceModule.java:256) 
    at com.google.common.util.concurrent.ForwardingFuture.get(ForwardingFuture.java:69) 
    at com.google.common.util.concurrent.Futures$ChainingListenableFuture.get(Futures.java:661) 
    at org.jclouds.concurrent.ExceptionParsingListenableFuture.get(ExceptionParsingListenableFuture.java:76) 
    at org.jclouds.concurrent.internal.SyncProxy.invoke(SyncProxy.java:159) 
    ... 2 more

重要的代码片段如下：

ComputeServiceContext EC2context = 
      new ComputeServiceContextFactory().createContext("aws-ec2", 
      accesskeyid, 
      secretkey, 
      ImmutableSet.<Module> of(new Log4JLoggingModule(), 
      new SshjSshClientModule())); 

    ComputeService ec2 = EC2context.getComputeService(); 

    for (ComputeMetadata c : ec2.listNodes()){ 
     NodeMetadata w = ec2.getNodeMetadata(c.getId()); 
     System.out.println(String.format("---node: %s(%s) status: %s---", 
       w.getId(), w.getName(),w.getState())); 

     RestContext<CloudWatchClient, CloudWatchAsyncClient> cloudWatchContext = 
         new RestContextFactory().createContext("aws-cloudwatch", 
                   accesskeyid, 
                   secretkey); 
     String region = w.getLocation().getParent().getId(); 


     Date startday = new Date(); 
     Date today = new Date(); 
     Calendar calendar; 
     calendar = Calendar.getInstance(); 
     calendar.setTime(today); 
     calendar.add(Calendar.DATE, -1); 
     startday = calendar.getTime(); 
     System.out.println("Today : " + today.toString()); 
     System.out.println("Startday: " + startday.toString()); 
     System.out.println("--going to fetch Average CPU--"); 

     CloudWatchClient client = cloudWatchContext.getApi(); 

     Set<Datapoint> datapoints = client.getMetricStatisticsInRegion(
        region, 
        "CPUUtilization", 
        "AWS/EC2", 
        startday, 
        today, 
        60, 
        Statistics.AVERAGE, 
        GetMetricStatisticsOptions.Builder.unit(Unit.PERCENT)); 
     System.out.println(String.format("---datapoint for %s---",c.getId())); 
     System.out.print(datapoints); 
     System.out.println("------end------"); 

    }

来源

2012-04-13 cool_n_curious

我已经运行你的代码，并试图重现该问题，但它适用于我。我试过jclouds 1.3.2,1.4.0和1.5.0-SNAPSHOT，并且都运行正常。你能提供更多关于你的jclouds版本和你的环境的信息吗？ – 2012-04-17 11:02:08

的CloudWatch的最终版本不同的语法。请查看cloudwatch-basics示例，并使用jclouds 1.5.3+版本并查看是否仍然遇到问题。

来源

2012-11-16 20:46:32

为什么CloudWatch API getMetricStatisticsInRegion与jclouds一起使用会引发UndeclaredThrowableException？

回答

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