If you use cluster, or not, it is not upon you, but upon the configuration of JBoss under your application.
If you do not use cluster, how can you explain the following message (cluster=CDI-HAPartitionCache) from the given output?
2011-04-07 22:27:43,548 INFO [STDOUT] (JBoss System Threads(1)-3)
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GMS: address is 3.204.35.60:56834 (cluster=CDI)
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2011-04-07 22:27:43,684 INFO [STDOUT] (main)
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GMS: address is 3.204.35.60:56834 (cluster=CDI-HAPartitionCache)
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2011-04-07 22:27:48,963 DEBUG [com.gehc.device.kernel.mbean.KernelService] (main) KernelFactoryName: java:/ecis/KernelFactory