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https://issues.apache.org/jira/browse/HDFS-14528?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ravuri Sushma sree updated HDFS-14528:
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Attachment: HDFS-14528.007.patch
> 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
> Labels: multi-sbnn
> Attachments: HDFS-14528.003.patch, HDFS-14528.004.patch,
> HDFS-14528.005.patch, HDFS-14528.006.patch, HDFS-14528.007.patch,
> HDFS-14528.2.Patch, ZKFC_issue.patch
>
>
> *In a cluster with more than one Standby namenode, manual failover throws
> exception for some cases*
> *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 the following cases :
> Scenario 1 :
> Namenodes - NN1(Active) , NN2(Standby), NN3(Standby)
> When trying to manually failover from NN1 to NN2 if NN3 is down, Exception is
> thrown
> Scenario 2 :
> Namenodes - NN1(Active) , NN2(Standby), NN3(Standby)
> ZKFC's - ZKFC1, ZKFC2, ZKFC3
> When trying to manually failover using NN1 to NN3 if NN3's ZKFC (ZKFC3) is
> down, Exception is thrown
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