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From "Ayush Saxena (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-14528) [SBN Read]Failover from Active to Standby Failed
Date Tue, 04 Jun 2019 20:15:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-14528?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16856086#comment-16856086
] 

Ayush Saxena commented on HDFS-14528:
-------------------------------------

Well if it is a never ever scenario for observer, Probably please change the description to
something {{Observer shouldn't participate in failover}} or something like that. What this
JIRA does actually.

If [~brahmareddy] is in agreement. I am more than happy. A UT  can be extended for for this.

 Well this connect Exception failure stuff in multiple namenodes still stays in my head, it
doesn't block here so you may go ahead, Will discuss this with my people, Will let you know
if I get something. :)

> [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: 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; For more details see: [http://wiki.apache.org/hadoop/ConnectionRefused]
>  at sun.reflect.GeneratedConstructorAccessor7.newInstance(Unknown Source)
>  at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>  at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
>  at org.apache.hadoop.net.NetUtils.wrapWithMessage(NetUtils.java:831)
>  at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:755) 



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