Use Collection instead of Set ----------------------------- Key: ISPN-6935 URL: https://issues.jboss.org/browse/ISPN-6935 Project: Infinispan Issue Type: Sub-task Components: Core Affects Versions: 9.0.0.Alpha4 Reporter: Radim Vansa Assignee: Radim Vansa Fix For: 9.0.0.Beta1 Currently the xManyCommand commands hold the keys in a set internally. During marshalling and splitting the set (when the command goes remote), we use {{HashSet}}. However, this has drawbacks: a) if the set passed to command uses different means of equality than {{Object.hashCode()}} and {{Object.equals()}} we may lose some keys in the derived set - we don't inject dataContainer's keyEquivalence to the commands b) as these sets are usually just iterated through (contains() is rare) it's less effective to use complex data structures as {{HashSet}} - plain {{ArrayList}} is sufficient.