guoweiM commented on a change in pull request #10152: [FLINK-14466][runtime] 
Let YarnJobClusterEntrypoint use user code class loader
URL: https://github.com/apache/flink/pull/10152#discussion_r346343990
 
 

 ##########
 File path: 
flink-yarn/src/main/java/org/apache/flink/yarn/entrypoint/YarnJobClusterEntrypoint.java
 ##########
 @@ -61,10 +65,20 @@ protected String getRPCPortRange(Configuration 
configuration) {
        }
 
        @Override
-       protected DefaultDispatcherResourceManagerComponentFactory 
createDispatcherResourceManagerComponentFactory(Configuration configuration) {
+       protected DefaultDispatcherResourceManagerComponentFactory 
createDispatcherResourceManagerComponentFactory(Configuration configuration) 
throws IOException {
+               final YarnConfigOptions.UserJarInclusion userJarInclusion = 
configuration
+                       .getEnum(YarnConfigOptions.UserJarInclusion.class, 
YarnConfigOptions.CLASSPATH_INCLUDE_USER_JAR);
+               checkState(
+                       userJarInclusion != 
YarnConfigOptions.UserJarInclusion.DISABLED || 
tryFindUserLibDirectory().isPresent(),
+                       String.format("The %s is set to %s. But the usrlib 
directory does not exist.",
 
 Review comment:
   ok

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