I agree with Arnold. Seems like no solutions.
but This is very strange JBoss Enterprise BRMS Platform is based on jbPM5 and is cluster enable
https://access.redhat.com/knowledge/docs/en-US/JBoss_Enterprise_BRMS_Platform/5/pdf/BRMS_Getting_Started_Guide/JBoss_Enterprise_BRMS_Platform-5-BRMS_Getting_Started_Guide-en-US.pdf
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