Hi Gemma! I know that some topic Misha excluded for 6,3,0 and it should be included again. But we should contact developers about how Consistent Hashing algorithms should be designed and information included in that topic
Changing NEEDINFO to Dan. Dan please see the NEEDINFO request I initially posted to Tristan in Comment 5. Thanks.
The fix for this bug is now available on access.redhat.com: https://access.redhat.com/documentation/en-US/Red_Hat_JBoss_Data_Grid/6.3/