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Subject [GitHub] [flink] tillrohrmann commented on a change in pull request #10971: [FLINK-15791][kubernetes] Use explicit I/O Executor for asynchronous operations in Fabric8FlinkKubeClient
Date Fri, 31 Jan 2020 13:35:30 GMT
tillrohrmann commented on a change in pull request #10971: [FLINK-15791][kubernetes] Use explicit
I/O Executor for asynchronous operations in Fabric8FlinkKubeClient
URL: https://github.com/apache/flink/pull/10971#discussion_r373479496
 
 

 ##########
 File path: flink-kubernetes/src/main/java/org/apache/flink/kubernetes/kubeclient/Fabric8FlinkKubeClient.java
 ##########
 @@ -81,6 +85,8 @@
 	private final List<Decorator<Deployment, KubernetesDeployment>> flinkMasterDeploymentDecorators
= new ArrayList<>();
 	private final List<Decorator<Pod, KubernetesPod>> taskManagerPodDecorators =
new ArrayList<>();
 
+	private final ExecutorService executorService = Executors.newFixedThreadPool(4, new ExecutorThreadFactory("Flink-KubeClient-IO"));
 
 Review comment:
   Usually, a more flexible approach is to pass in an `Executor` to the `Fabric8FlinkKubeClient`.
Then an external component is responsible for the management of the executor. However, on
needs to make sure that the `Fabric8FlinkKubeClient` does not live longer than the passed
in `Executor`. One could then for example also write a wrapper whose responsibility is the
management of the executor. This separates concerns better and it would give one the opportunity
to decide whether to create a dedicated thread pool or to reuse an existing one.

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