Keycloak Quarkus 18.0.0 ERROR [org.jgroups.JChannel] (keycloak-cache-init) JGRP000016: exception in channelConnected callback: java.lang.NullPointerException

Configuring the server
1

Hi Guys,
I am trying to setup Keycloak Quarkus in cluster mode. Below is my cache config file:

<?xml version="1.0" encoding="UTF-8"?>
<infinispan
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="urn:infinispan:config:13.0 http://www.infinispan.org/schemas/infinispan-config-13.0.xsd"
        xmlns="urn:infinispan:config:13.0">
    <jgroups>
        <stack name="encrypt-tcp" extends="tcp">
            <TCP bind_port="7600"/>
            <dns.DNS_PING dns_query="service-headless"
                          stack.combine="REPLACE"
                          stack.position="MPING"/>
            <FD_SOCK start_port="57600"
                     stack.combine="REPLACE"
                     stack.position="FD_SOCK"/>
<!-- configure security for communication -->
<!-- SSL_KEY_EXCHANGE will authenticate nodes. Prevents rouge nodes from joining the cluster -->
            <SSL_KEY_EXCHANGE keystore_name="/opt/jboss/rundir-safe/ha.keystore"
                              keystore_password="${env.KEYSTORE_SECRET}"
                              session_verifier_class="org.jgroups.protocols.CertficateCNMatcher"
                              session_verifier_arg="CN=access-mgmt"
                              port="2157"
                              ssl_protocol="TLSv1.2"
                              stack.combine="INSERT_AFTER"
                              stack.position="VERIFY_SUSPECT"/>
            <ASYM_ENCRYPT asym_keylength="2048"
                          change_key_on_leave="true"
                          change_key_on_coord_leave="true"
                          use_external_key_exchange="true"
                          sym_keylength="128"
                          sym_algorithm="AES"
                          asym_algorithm="RSA"
                          stack.combine="INSERT_AFTER"
                          stack.position="SSL_KEY_EXCHANGE"/>
            <pbcast.GMS max_join_attempts="5"
                        join_timeout="10000"
                        stack.combine="REPLACE"
                        stack.position="pbcast.GMS"/>
        </stack>
    </jgroups>
    <cache-container name="keycloak">
        <transport stack="encrypt-tcp"
                   lock-timeout="60000"
                   cluster="ADP-IAM"/>
        <local-cache name="realms">
            <encoding>
                <key media-type="application/x-java-object"/>
                <value media-type="application/x-java-object"/>
            </encoding>
            <memory max-count="10000"/>
        </local-cache>
        <local-cache name="users">
            <encoding>
                <key media-type="application/x-java-object"/>
                <value media-type="application/x-java-object"/>
            </encoding>
            <memory max-count="10000"/>
        </local-cache>
        <local-cache name="authorization">
            <encoding>
                <key media-type="application/x-java-object"/>
                <value media-type="application/x-java-object"/>
            </encoding>
            <memory max-count="10000"/>
        </local-cache>
        <local-cache name="keys">
            <encoding>
                <key media-type="application/x-java-object"/>
                <value media-type="application/x-java-object"/>
            </encoding>
            <expiration max-idle="3600000"/>
            <memory max-count="1000"/>
        </local-cache>
        <replicated-cache name="work">
            <expiration lifespan="-1"/>
        </replicated-cache>
        <distributed-cache name="sessions" owners="${env.CACHE_OWNERS:2}">
            <expiration lifespan="-1"/>
        </distributed-cache>
        <distributed-cache name="authenticationSessions" owners="${env.CACHE_OWNERS:2}">
            <expiration lifespan="-1"/>
        </distributed-cache>
        <distributed-cache name="offlineSessions" owners="${env.CACHE_OWNERS:2}">
            <expiration lifespan="-1"/>
        </distributed-cache>
        <distributed-cache name="clientSessions" owners="${env.CACHE_OWNERS:2}">
            <expiration lifespan="-1"/>
        </distributed-cache>
        <distributed-cache name="offlineClientSessions" owners="${env.CACHE_OWNERS:2}">
            <expiration lifespan="-1"/>
        </distributed-cache>
        <distributed-cache name="loginFailures" owners="${env.CACHE_OWNERS:2}">
            <expiration lifespan="-1"/>
        </distributed-cache>
        <distributed-cache name="actionTokens" owners="${env.CACHE_OWNERS:2}">
            <encoding>
                <key media-type="application/x-java-object"/>
                <value media-type="application/x-java-object"/>
            </encoding>
            <expiration max-idle="-1" lifespan="-1" interval="300000"/>
            <memory max-count="-1"/>
        </distributed-cache>
    </cache-container>
</infinispan>

I am not setting --cache-stack as I am defining my own stack. Everything works fine but I get below error:
2022-09-13 11:27:06,570 ERROR [org.jgroups.JChannel] (keycloak-cache-init) JGRP000016: exception in channelConnected callback: java.lang.NullPointerException

Am I missing something?