[ https://issues.jboss.org/browse/ISPN-4092?page=com.atlassian.jira.plugin.... ] Eric Bonnot commented on ISPN-4092: ----------------------------------- Well, yes, I haven't noticed that when I cloned the previous issue... But it reveals that Infinispan issues are strongly monitored (thank you for your quick reply) ! So maybe : @Override public List<Address> getNewMembers() { if(this.newMembers == null){ this.setNewMembers(InfinispanCollections.emptyList()); } return this.newMembers; } public synchronized void setNewMembers(List<Address> newMembers) { this.newMembers = newMembers; } public synchronized void setOldMembers(List<Address> oldMembers) { this.oldMembers = oldMembers; } @Override public List<Address> getOldMembers() { if(this.oldMembers == null){ this.setOldMembers(InfinispanCollections.emptyList()); } return this.oldMembers; } And maybe : public synchronized void setSubgroupsMerged(List<List<Address>> subgroupsMerged) { this.subgroupsMerged = subgroupsMerged; } @Override public List<List<Address>> getSubgroupsMerged() { if(this.subgroupsMerged== null){ this.setSubgroupsMerged(InfinispanCollections.emptyList()); } return this.subgroupsMerged; } -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira