From your comments, I understand this is not self healing, or? If so, do you have some nodes to reproduce this behavior? What version of ISPN are you using and how is the cache configured?

TcpTransportFactory stores failed SocketAddress in RequestBalancingStrategy --------------------------------------------------------------------------- Key: ISPN-3876 URL: https://issues.jboss.org/browse/ISPN-3876 Project: Infinispan Issue Type: Bug Affects Versions: 5.2.1.Final, 5.3.0.Final, 6.0.0.Final Environment: Hotrod Client, Java Reporter: Patrick Seeber Assignee: Mircea Markus The "updateServers" Method in the TcpTransportFactory class iterates over all addedServers and adds them to the connection pool if no exceptions are thrown. Howerver, if an exception is thrown, the SocketAddress may not have been added to the conection pool but is added to the balancer afterwards. Therefore, the balancer may contain an invalid SocketAddress which is not contained in the connection pool. In our application with few distributed caches, we encounter situations where all servers (SocketAddresses) are corrupt and the application fails to load or store entries in/from the cache.