If the KUBERNETES_NAMESPACE is not set the default value is the "default" namespace ------------------------------------------------------------------------------------ Key: JGRP-2502 URL: https://issues.redhat.com/browse/JGRP-2502 Project: JGroups Issue Type: Bug Affects Versions: 5.0.4 Reporter: Filippe Spolti Assignee: Bela Ban Priority: Minor If no namespace is set it defaults to the "default" ocp namespace  which will case the warn as described in the log message below:   {code:java} WARN [org.jgroups.protocols.kubernetes.KUBE_PING] (thread-9,ee,hdm78-kieserver-1-nggcf) failed getting JSON response from Kubernetes Client[masterUrl=https://172.30.0.1:443/api/v1, headers={Authorization=#MASKED:937#}, connectTimeout=5000, readTimeout=30000, operationAttempts=3, operationSleep=1000, streamProvider=org.jgroups.protocols.kubernetes.stream.TokenStreamProvider@69991c01] for cluster [ee], namespace [default], labels [null]; encountered [java.lang.Exception: 3 attempt(s) with a 1000ms sleep to execute [OpenStream] failed. Last failure was [java.io.IOException: Server returned HTTP response code: 403 for URL: https://172.30.0.1:443/api/v1/namespaces/default/pods]] {code} IMHO the default namespace should not be used in this case since this namespace should not be used to deploy applications.   If the namespace is not set it means that we do not want to enable the clustering feature, as the namespace is set if the namespace is not set, this condition [1] is not satisfied and the configuration will proceed.   Another problem found in the tests is that, if we do set the KUBERNETES_NAMESPACE with no value, it will detect that the env has an value and will try to use a blank namespace:    {code:java} failed getting JSON response from Kubernetes Client[masterUrl=https://172.30.0.1:443/api/v1 , headers={Authorization=#MASKED:874#}, connectTimeout=5000, readTimeout=30000, operationAttempts=3, operationSleep=1000, streamProvider=org.jgroups.protocols.kubernetes.stream.TokenStreamProvider@17978314] for cluster [ee], namespace [], labels [null]; encountered [java.lang.Exception: 3 attempt(s) with a 1000ms sleep to execute [OpenStream] failed. Last failure was [java.io.IOException: Server returned HTTP response code: 403 for URL: https://172.30.0.1:443/api/v1/pods ]] {code}   [1] - https://github.com/jgroups-extras/jgroups-kubernetes/blob/master/src/main/java/org/jgroups/protocols/kubernetes/KUBE_PING.java#L145