Uma Maheswara Rao G commented on HBASE-5733:

When we can not get the children due to ZK problem, we may not be able to mark 
as failover as there is no nodes.
In-fact currently it will throw NPE.  Do we need to shutdown the master in this 
case? or we can retry?

> AssignmentManager#processDeadServersAndRegionsInTransition can fail with NPE.
> -----------------------------------------------------------------------------
>                 Key: HBASE-5733
>                 URL: https://issues.apache.org/jira/browse/HBASE-5733
>             Project: HBase
>          Issue Type: Bug
>          Components: master
>    Affects Versions: 0.96.0
>            Reporter: Uma Maheswara Rao G
>            Assignee: Uma Maheswara Rao G
> Found while going through the code...
> AssignmentManager#processDeadServersAndRegionsInTransition can fail with NPE 
> as this is directly iterating the nodes from 
> listChildrenAndWatchForNewChildren with-out checking for null.
> Here also we need to handle with  null  check like other places.

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