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From "Raghu Angadi (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-3381) INode interlinks can multiply effect memory leaks
Date Tue, 13 May 2008 18:31:55 GMT
INode interlinks can multiply effect memory leaks
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                 Key: HADOOP-3381
                 URL: https://issues.apache.org/jira/browse/HADOOP-3381
             Project: Hadoop Core
          Issue Type: Bug
    Affects Versions: 0.16.0
            Reporter: Raghu Angadi
            Assignee: Raghu Angadi



Say a directory 'DIR' has a directory tree under it with say 10000 files and directories.
Each INode keeps refs to parent and children. When DIR is deleted, memory wise we essentially
delete link from its parent (and delete the corresponding blocks from {{blocksMap}}). We don't
modify its children. This is ok since this will form an island of references and will be gc-ed.
Thats when everything is perfect. But if there is a bug that leaves a ref from a valid object
(there is a suspect, I will another jira) to even one of these 10000 files, it could hold
up all the INode and related objects. This can make a smaller mem leak many times more severe.




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