Can I upgrade lvm2-cluster package online in High Availability Cluster? - Red Hat Customer Portal

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Issue

Can I update lvm2-cluster HA cluster package online or does it require restart?
I want to update the lvm2-cluster package version because lvm commands are hung on server therefore following the solution lvm commands hang when using CLVM in RHEL 4 or 5 it will be solved. Is reboot/restart of service/server required?
The lvm2 version is old and would like to update it, my question is if I need to stop cluster or I can do it online?

Environment

Red Hat Enterprise Linux(RHEL) 5/6 with the Resilient Storage Add On

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