Hi Paul,

Snippet from from server configuration.--> "Node1.xml" . In below snippet "jboss.node.name" value is "Node1". Our jboss instances are in non cluster mode.

<subsystem xmlns="urn:jboss:domain:undertow:3.1" instance-id="${jboss.node.name}">

            <buffer-cache name="default"/>

            <server name="default-server">

                <ajp-listener name="ajp" socket-binding="ajp" scheme="http"/>

                <http-listener name="default" socket-binding="http" redirect-socket="https"/>

                <host name="default-host" alias="localhost">

<access-log pattern="%h %l %u [%t] &quot;%r&quot; %s %b &quot;%{i,Referer}&quot; &quot;%{i,User-Agent}&quot;"/>

                    <location name="/" handler="welcome-content"/>

                    <filter-ref name="server-header"/>

                    <filter-ref name="x-powered-by-header"/>

                </host>

            </server>

            <servlet-container name="default">

                <jsp-config/>

                <websockets/>

            </servlet-container>

            <handlers>

                <file name="welcome-content" path="${jboss.home.dir}/welcome-content"/>

            </handlers>

            <filters>

                <response-header name="server-header" header-name="Server" header-value="JBoss-EAP/7"/>

                <response-header name="x-powered-by-header" header-name="X-Powered-By" header-value="Undertow/1"/>

            </filters>

        </subsystem>

Thanks,

Sarbajeet

I got the solution from this : Instance-id is not appended to session id when using non-HA profile in JBoss EAP 7.0 - Red Hat Customer Portal