High CPU in concurrent access to the JSSESupport keySizeCache map

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Issue

JBoss is consuming high CPU. Thread dumps and CPU data shows high CPU in web request threads that are accessing the keySizeCache WeakHashMap in JSSESupport.getKeySize().

Environment

JBoss Enterprise Application Platform (EAP)
- 6.2 CP01
- 6.2 CP02
- 6.2 CP03

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