Viraj Jasani created HDFS-15931:
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Summary: Fix non-static inner classes for better memory management
Key: HDFS-15931
URL: https://issues.apache.org/jira/browse/HDFS-15931
Project: Hadoop HDFS
Issue Type: Improvement
Reporter: Viraj Jasani
Assignee: Viraj Jasani
If an inner class does not need to reference its enclosing instance, it can be
static. This prevents a common cause of memory leaks and uses less memory per
instance of the enclosing class.
Came across DataNodeProperties as a non static inner class defined in
MiniDFSCluster without holding any implicit reference to MiniDFSCluster. Taking
this opportunity to find other non-static inner classes that are not holding
implicit reference to their respective enclosing instances.
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