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https://issues.apache.org/jira/browse/HDFS-13234?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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He Xiaoqiao updated HDFS-13234:
-------------------------------
    Attachment: HDFS-13234.001.patch

> Remove renew configuration instance in ConfiguredFailoverProxyProvider and 
> reduce memory footprint for client
> -------------------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-13234
>                 URL: https://issues.apache.org/jira/browse/HDFS-13234
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: fs, ha, hdfs-client
>            Reporter: He Xiaoqiao
>            Priority: Major
>         Attachments: HDFS-13234.001.patch
>
>
> The memory footprint of #DFSClient is very considerable in some special 
> scenario since there are many #Configuration instances and occupy much memory 
> resource (In an extreme case, org.apache.hadoop.conf.Configuration occupies 
> over 600MB we meet under HDFS Federation an HA with QJM and there are dozens 
> of NameNodes). I think some new Configuration instance is not necessary. Such 
> as  #ConfiguredFailoverProxyProvider initialization.
> {code:java}
>   public ConfiguredFailoverProxyProvider(Configuration conf, URI uri,
>       Class<T> xface, HAProxyFactory<T> factory) {
>     this.xface = xface;
>     this.conf = new Configuration(conf);
>     ......
>   }
> {code}



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