A HotRod client fail over silent if one instance is shutting down if there is no Security enabled.
With role based authentication the client fail sporadically with a WARN message
WARN: ISPN004005: Error received from the server: java.security.PrivilegedActionException: org.infinispan.IllegalLifecycleStateException: ISPN000324: Cache 'testCache' is in 'STOPPING' state and this is an invocation not belonging to an on-going transaction, so it does not accept new invocations. Either restart it or recreate the cache container.
and the following Exception:
org.infinispan.client.hotrod.exceptions.HotRodClientException:Request for message id[2825] returned server error (status=0x85): java.security.PrivilegedActionException: org.infinispan.IllegalLifecycleStateException: ISPN000324: Cache 'testCache' is in 'STOPPING' state and this is an invocation not belonging to an on-going transaction, so it does not accept new invocations. Either restart it or recreate the cache container. at org.infinispan.client.hotrod.impl.protocol.Codec20.checkForErrorsInResponseStatus(Codec20.java:336) at org.infinispan.client.hotrod.impl.protocol.Codec20.readPartialHeader(Codec20.java:126) at org.infinispan.client.hotrod.impl.protocol.Codec20.readHeader(Codec20.java:112) at org.infinispan.client.hotrod.impl.operations.HotRodOperation.readHeaderAndValidate(HotRodOperation.java:56) at org.infinispan.client.hotrod.impl.operations.AbstractKeyValueOperation.sendPutOperation(AbstractKeyValueOperation.java:57) at org.infinispan.client.hotrod.impl.operations.PutIfAbsentOperation.executeOperation(PutIfAbsentOperation.java:36) at org.infinispan.client.hotrod.impl.operations.PutIfAbsentOperation.executeOperation(PutIfAbsentOperation.java:23) at org.infinispan.client.hotrod.impl.operations.RetryOnFailureOperation.execute(RetryOnFailureOperation.java:52) at org.infinispan.client.hotrod.impl.RemoteCacheImpl.putIfAbsent(RemoteCacheImpl.java:257) at org.infinispan.client.hotrod.impl.RemoteCacheSupport.putIfAbsent(RemoteCacheSupport.java:54) at HotRodTestClient.updateCache(HotRodTestClient.java:69) at HotRodTestClient.lambda$queuePut$0(HotRodTestClient.java:88) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745)