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https://issues.apache.org/jira/browse/HADOOP-12707?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16500549#comment-16500549
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Steve Loughran commented on HADOOP-12707:
-----------------------------------------
Added proxy users to the title.
[~cnauroth]: what are your thoughts here?
[~xinlishang] I think you may want to consider what you could do with your own
cache, as that would isolate your code & you could be clever here. That is; you
can cache filesystems outside FileSystem.cache if you really want to
> key of FileSystem inner class Cache contains UGI.hascode which uses the
> default hascode method, leading to the memory leak with Proxy Users
> -------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: HADOOP-12707
> URL: https://issues.apache.org/jira/browse/HADOOP-12707
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs
> Affects Versions: 2.7.1
> Reporter: sunhaitao
> Assignee: sunhaitao
> Priority: Major
>
> FileSystem.get(conf) method,By default it will get the fs object from
> CACHE,But the key of the CACHE constains ugi.hashCode, which uses the
> default hascode method of subject instead of the hascode method overwritten
> by subject.
> @Override
> public int hashCode() {
> return (scheme + authority).hashCode() + ugi.hashCode() + (int)unique;
> }
> In this case, even if same user, if the calll FileSystem.get(conf) twice, two
> different key will be created. In long duartion, this will lead to memory
> leak.
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