tillrohrmann commented on a change in pull request #12264:
URL: https://github.com/apache/flink/pull/12264#discussion_r430897263



##########
File path: 
flink-runtime/src/main/java/org/apache/flink/runtime/taskexecutor/TaskManagerServices.java
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@@ -265,10 +265,15 @@ public static TaskManagerServices fromConfiguration(
                // start the I/O manager, it will create some temp directories.
                final IOManager ioManager = new 
IOManagerAsync(taskManagerServicesConfiguration.getTmpDirPaths());
 
+               final ExecutorService ioExecutor = Executors.newFixedThreadPool(

Review comment:
       I think it is actually a good idea to move it away from the 
`RpcService's` executor because this is the same pool which is used to run the 
`RpcEndpoints`.




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