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https://issues.apache.org/jira/browse/FLINK-15251?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yang Wang updated FLINK-15251:
------------------------------
Parent: FLINK-9953
Issue Type: Sub-task (was: Bug)
> Fabric8FlinkKubeClient doesn't work if ingress has hostname but no IP
> ---------------------------------------------------------------------
>
> Key: FLINK-15251
> URL: https://issues.apache.org/jira/browse/FLINK-15251
> Project: Flink
> Issue Type: Sub-task
> Components: Deployment / Kubernetes
> Affects Versions: 1.10.0
> Environment: Kubernetes for Docker on MacOS
> Reporter: Aljoscha Krettek
> Assignee: Aljoscha Krettek
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.10.0
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> In my setup the ingress has a hostname but no IP here:
> https://github.com/apache/flink/blob/f49e632bb290ded45b320f5d00ceaa1543a6bb1c/flink-kubernetes/src/main/java/org/apache/flink/kubernetes/kubeclient/Fabric8FlinkKubeClient.java#L199
> This means that when I try to use the Kubernetes Executor I will get
> {code}
> Exception in thread "main" java.lang.NullPointerException: Address should not
> be null.
> at
> org.apache.flink.util.Preconditions.checkNotNull(Preconditions.java:75)
> at
> org.apache.flink.kubernetes.kubeclient.Endpoint.<init>(Endpoint.java:33)
> at
> org.apache.flink.kubernetes.kubeclient.Fabric8FlinkKubeClient.getRestEndpoint(Fabric8FlinkKubeClient.java:209)
> at
> org.apache.flink.kubernetes.KubernetesClusterDescriptor.lambda$createClusterClientProvider$0(KubernetesClusterDescriptor.java:82)
> at
> org.apache.flink.kubernetes.KubernetesClusterDescriptor.retrieve(KubernetesClusterDescriptor.java:106)
> at
> org.apache.flink.kubernetes.KubernetesClusterDescriptor.retrieve(KubernetesClusterDescriptor.java:53)
> at
> org.apache.flink.client.deployment.AbstractSessionClusterExecutor.execute(AbstractSessionClusterExecutor.java:60)
> at
> org.apache.flink.streaming.api.environment.StreamExecutionEnvironment.executeAsync(StreamExecutionEnvironment.java:1741)
> at
> org.apache.flink.streaming.api.environment.StreamExecutionEnvironment.executeAsync(StreamExecutionEnvironment.java:1712)
> at
> org.apache.flink.streaming.examples.statemachine.StateMachineExample.main(StateMachineExample.java:169)
> {code}
> I think we can just check if a hostname is set and use that if there is no IP.
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