kubernetes versionInfo returns null

[leogps]

The below always returns null because the implementation is not constructing the endpoint properly and is failing to complete the HTTP request correctly.
VersionInfo versionInfo = kubernetesClient.getVersion();

In the ClusterOperationsImpl#fetchVersion method, it should be
Builder requestBuilder = (new Builder()).get().url(this.config.getMasterUrl() + "/" + this.versionEndpoint);
The path separator is missing.

Line 43:
https://github.com/fabric8io/kubernetes-client/blob/59e5b9d0f318f4f78f417efaec34050ed8122b8f/kubernetes-client/src/main/java/io/fabric8/kubernetes/client/dsl/internal/ClusterOperationsImpl.java

[rohanKanojia]

Strange, I tested this but it's working for me both with masterUrl and without masterUrl. Could you please share the Config object which you use to create client?

[candyleer]

I have the same problem,I found the root cause.
we config the client by Config.fromKubeconfig("") ,in this method,the masterUrl will not ignore if the masterUrl is end with slash,but in default config,the masterUrl will detect slash,that makes the problem occur.

 private static boolean loadFromKubeconfig(Config config, String context, String kubeconfigContents, String kubeconfigPath) {
   ....
      if (currentCluster != null) {
        config.setMasterUrl(currentCluster.getServer());
        config.setNamespace(currentContext.getNamespace());

private static Config autoConfigure(Config config, String context) {
   ...
    if (!config.masterUrl.endsWith("/")) {
      config.masterUrl = config.masterUrl + "/";
    }
    return config;
  }

maybe i can send a pr to fix this?

ERROR is

Caused by: java.net.UnknownHostException: xxxxx.comversion: nodename nor servname provided, or not known
	at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
	at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:928)

[rohanKanojia]

@candyleer : Yeah, please create PR and we can discuss over there.

[candyleer]

@rohanKanojia I have create PR very simple ,#1329