I'd rather partition caches to the extent possible and not use one instance because:
-lock-striping problems discussed elsewhere will intensify
-performance will possibly decrease (esp with writes)
-jmx stats get mushed together
In my setup (or in general?), the problem seems to've been that multiple Cache
instances shared the same RuntimeConfig instance (injectected singleton). I thought that
was OK but I was wrong because RPCManagerImpl saves JChannel instance to runtimeConfig in
initialiseChannelAndRpcDispatcher(). So if you've got multiple channels, first one
wins ;-
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