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https://issues.apache.org/jira/browse/AMBARI-13959?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15012047#comment-15012047
 ] 

jun aoki commented on AMBARI-13959:
-----------------------------------

Thank you for catching the root cause [~odiachenko]! 
Recently Ambari's trunk commit build is unstable and Hadoop QA is giving false 
negatives to on jiras that are committed to trunk.
e.g.
https://builds.apache.org/view/A-D/view/Ambari/job/Ambari-trunk-Commit/3853/console
https://builds.apache.org/view/A-D/view/Ambari/job/Ambari-trunk-Commit/3854/console
https://builds.apache.org/view/A-D/view/Ambari/job/Ambari-trunk-Commit/3851/console
{code}
testServerStatus(org.apache.ambari.server.functionaltests.server.StartStopServerTest)
  Time elapsed: 20.218 sec  <<< ERROR!
java.net.ConnectException: Connection refused
        at java.net.PlainSocketImpl.socketConnect(Native Method)
        at 
java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
        at 
java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
        at 
java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
        at java.net.Socket.connect(Socket.java:579)
        at java.net.Socket.connect(Socket.java:528)
        at java.net.Socket.<init>(Socket.java:425)
        at java.net.Socket.<init>(Socket.java:280)
        at 
org.apache.commons.httpclient.protocol.DefaultProtocolSocketFactory.createSocket(DefaultProtocolSocketFactory.java:80)
        at 
org.apache.commons.httpclient.protocol.DefaultProtocolSocketFactory.createSocket(DefaultProtocolSocketFactory.java:122)
        at 
org.apache.commons.httpclient.HttpConnection.open(HttpConnection.java:707)
        at 
org.apache.commons.httpclient.HttpMethodDirector.executeWithRetry(HttpMethodDirector.java:387)
        at 
org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:171)
        at 
org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:397)
        at 
org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:323)
        at 
org.apache.ambari.server.functionaltests.server.StartStopServerTest.testServerStatus(StartStopServerTest.java:135)
{code}



> StartStopServerTest is not stable due to timing issue
> -----------------------------------------------------
>
>                 Key: AMBARI-13959
>                 URL: https://issues.apache.org/jira/browse/AMBARI-13959
>             Project: Ambari
>          Issue Type: Bug
>          Components: ambari-server
>            Reporter: Oleksandr Diachenko
>
> Behavior of StartStopServerTest is unstable, probably due to 
> StartStopServerTest:90.



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