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https://issues.apache.org/jira/browse/HADOOP-3648?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Loughran updated HADOOP-3648:
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Affects Version/s: (was: 0.19.0)
0.20.0
> improve singleton handling in DataNode
> --------------------------------------
>
> Key: HADOOP-3648
> URL: https://issues.apache.org/jira/browse/HADOOP-3648
> Project: Hadoop Core
> Issue Type: Improvement
> Components: dfs
> Affects Versions: 0.20.0
> Reporter: Steve Loughran
> Priority: Minor
>
> when a DataNode is constructed, it saves its identity to a static field:
> datanodeObject=this;
> 1. there's no check on what if this is already set
> 2. when the datanode terminates, it may want to set this to null
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