Issue from ISPN-3448 is also present in EAP 6.3.0.ER1 with Infinispan 5.2.8.Final-redhat-1. Seen across all platforms (except HP-UX which only has one configuration) and there is no pattern in JDK's either. There are logs are in the upstream JIRA.
Upstream jira already exists.
Tristan Tarrant <ttarrant> updated the status of jira ISPN-3448 to Resolved