[keycloak-dev] Infinispan error during update in ha configuration

[Мартынов Илья]

Hello!
I have Keycloak 4.5.0.Final deployed in standalone-ha configuration in k8s
cluster. When I try to update Keycloak to version 6.0.1, the following
happens:
1. K8s starts new pod with version 6.0.1
2. Old pod still running, it will be terminated on successfull readiness
probe of the new pod
3. New pod discovers old pod via JGroups, cache synchronization started
4. Exception in new pod:
02-07-2019;13:34:29,220 WARN [stateTransferExecutor-thread--p25-t1]
org.infinispan.statetransfer.InboundTransferTask ISPN000210: Failed to
request state of cache work from node idp-6569c544b
-hsd6g, segments {0-255}: org.infinispan.remoting.RemoteException:
ISPN000217: Received exception from idp-6569c544b-hsd6g, see cause for
remote stack trace
        at org.infinispan at 9.4.8.Final
//org.infinispan.remoting.transport.ResponseCollectors.wrapRemoteException(ResponseCollectors.java:28)
...
Caused by: java.io.IOException: Unknown type: 132
        at
org.infinispan.marshall.core.GlobalMarshaller.readNonNullableObject(GlobalMarshaller.java:681)
        at
org.infinispan.marshall.core.GlobalMarshaller.readNullableObject(GlobalMarshaller.java:355)
        at
org.infinispan.marshall.core.BytesObjectInput.readObject(BytesObjectInput.java:40)

Looks like this exception blocks further Keycloak startup, because nothing
happens in logs afterwards. Also, my rest service deployed as JAX-RS bean
also doesn't respond, so pod is not treated as alive by Kubernetes.
Please help.