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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