Title: Rolling Upgrades Describe the issue: Add note that update operation is not supported during Rolling Upgrade and it can cause data inconsistency.
This note has been added and published to the customer portal; a link to this section is below: https://access.redhat.com/documentation/en-US/Red_Hat_JBoss_Data_Grid/6.6/html-single/Developer_Guide/index.html#chap-Rolling_Upgrades