Change the default Map implementation of session attributes to synchronized
HashMap for less memory consumption
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Key: DIRMINA-392
URL: https://issues.apache.org/jira/browse/DIRMINA-392
Project: MINA
Issue Type: Improvement
Components: Core
Affects Versions: 1.1.0
Reporter: Trustin Lee
Priority: Minor
Fix For: 1.1.1
In MINA 1.1.0, we used ConcurrentHashMap to store session attributes.
ConcurrentHashMap is known to consume much more memory than HashMap, so users
who have upgraded from 1.0.x are suffering from OOM. Let's revert back to
synchronized HashMap.
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