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https://issues.apache.org/jira/browse/HADOOP-12707?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
sunhaitao updated HADOOP-12707:
-------------------------------
Description:
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.
was:
FileSystem.get(conf) method,By default it will get the fs object from CACHE,But
the key of the CACHE
@Override
public int hashCode() {
return (scheme + authority).hashCode() + ugi.hashCode() + (int)unique;
}
> key of FileSystem inner class Cache contains UGI.hascode which uses the
> defualt hascode method, leading to the memory leak
> --------------------------------------------------------------------------------------------------------------------------
>
> 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
>
> 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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