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https://issues.apache.org/jira/browse/EAGLE-852?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15821419#comment-15821419
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ASF GitHub Bot commented on EAGLE-852:
--------------------------------------

Github user haoch commented on the issue:

    https://github.com/apache/eagle/pull/767
  
    LGTM


> Application start button should be disabled when it's running, and the same 
> for stop button 
> --------------------------------------------------------------------------------------------
>
>                 Key: EAGLE-852
>                 URL: https://issues.apache.org/jira/browse/EAGLE-852
>             Project: Eagle
>          Issue Type: Bug
>            Reporter: Lingang Deng
>            Assignee: Lingang Deng
>            Priority: Minor
>
> Application start button can click when it's running, it's improper, and 
> throw exception as follows
> {code}
> ERROR [2017-01-09 08:27:15,623] 
> org.apache.eagle.app.service.impl.ApplicationManagementServiceImpl: App: 
> HADOOP_METRIC_MONITOR_XHJ status is RUNNING start operation is not allowed
> ! org.apache.eagle.metadata.exceptions.ApplicationWrongStatusException: App: 
> HADOOP_METRIC_MONITOR_TEST_SITE status is RUNNING start operation is not 
> allowed
> ! at 
> org.apache.eagle.app.service.impl.ApplicationManagementServiceImpl.start(ApplicationManagementServiceImpl.java:196)
>  ~[classes/:na]
> ! at 
> org.apache.eagle.app.resource.ApplicationResource.lambda$startApplication$8(ApplicationResource.java:176)
>  [classes/:na]
> ! at 
> org.apache.eagle.metadata.resource.RESTResponse$RestResponseBuilder.lambda$async$1(RESTResponse.java:197)
>  ~[classes/:na]
> ! at 
> java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1626)
>  ~[na:1.8.0_102]
> ! at 
> java.util.concurrent.CompletableFuture$AsyncRun.exec(CompletableFuture.java:1618)
>  ~[na:1.8.0_102]
> ! at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289) 
> ~[na:1.8.0_102]
> ! at 
> java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056) 
> ~[na:1.8.0_102]
> ! at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692) 
> ~[na:1.8.0_102]
> ! at 
> java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157) 
> ~[na:1.8.0_102]
> {code}



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