Typical timeouts for replication are
ERROR [org.infinispan.interceptors.InvocationContextInterceptor] (remote-thread-595) ISPN000136: Execution error: org.infinispan.util.concurrent.TimeoutException: Replication timeout for jboss####-#####
and
ERROR ....
Caused by: org.infinispan.util.concurrent.TimeoutException: Node jboss####-##### timed out

The issue is that it is not possible to check what key/entry is affected.
The cache can become inconsistent between nodes.

There should be an information which key is affected.
For some operations it is not possible at all as there is no information about the entries (i.e. commit) or the key is binary or custom without a valid toString() method.