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https://issues.apache.org/jira/browse/AMBARI-2216?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13670742#comment-13670742
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Yusaku Sako commented on AMBARI-2216:
-------------------------------------
+1. Looks good to me.
> Hadoop2: Empty stack configuration values become 'null' on the node
> -------------------------------------------------------------------
>
> Key: AMBARI-2216
> URL: https://issues.apache.org/jira/browse/AMBARI-2216
> Project: Ambari
> Issue Type: Bug
> Components: client
> Affects Versions: 1.2.4
> Reporter: Srimanth Gunturi
> Assignee: Srimanth Gunturi
> Fix For: 1.4.0
>
> Attachments: AMBARI-2216.patch
>
>
> When viewing a new install of Hadoop2 that includes MAPREDUCE2, some
> properties defined as empty string are sent to the server as 'null':
> Stack:
> {noformat}
> <property>
> <name>mapred.job.tracker</name>
> <value></value>
> </property>
> {noformat}
> Server:
> {noformat}
> <property>
> <name>mapred.job.tracker</name>
> <value>null</value>
> </property>
> {noformat}
> The following properties exhibit this behavior:
> mapred.system.dir
> mapred.cluster.reduce.memory.mb
> mapred.hosts
> mapred.jobtracker.maxtasks.per.job
> mapred.userlog.retain.hours
> mapred.local.dir
> mapred.task.tracker.task-controller
> mapred.tasktracker.map.tasks.maximum
> mapred.hosts.exclude
> mapred.cluster.max.map.memory.mb
> mapred.cluster.max.reduce.memory.mb
> mapred.job.tracker.http.address
> mapred.jobtracker.taskScheduler
> mapred.healthChecker.script.path
> mapred.cluster.map.memory.mb
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