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https://issues.apache.org/jira/browse/HDFS-14528?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16911070#comment-16911070
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Ravuri Sushma sree commented on HDFS-14528:
-------------------------------------------

[~csun] [~ayushtkn] [~brahmareddy]  

I have added connection exception handling and added UT . Please Review 

> [SBN Read]Failover from Active to Standby Failed  
> --------------------------------------------------
>
>                 Key: HDFS-14528
>                 URL: https://issues.apache.org/jira/browse/HDFS-14528
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: ha
>            Reporter: Ravuri Sushma sree
>            Assignee: Ravuri Sushma sree
>            Priority: Major
>         Attachments: HDFS-14528.003.patch, HDFS-14528.2.Patch, 
> ZKFC_issue.patch
>
>
> *Started an HA Cluster with three nodes [ _Active ,Standby ,Observer_ ]*
> *When trying to exectue the failover command from active to standby* 
> *._/hdfs haadmin  -failover nn1 nn2, below Exception is thrown_*
>   Operation failed: Call From X-X-X-X/X-X-X-X to Y-Y-Y-Y:nnnn failed on 
> connection exception: java.net.ConnectException: Connection refused
> This is encountered in two cases : When any other standby namenode is down or 
> when any other zkfc is down 



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