xintongsong commented on a change in pull request #9105: 
[FLINK-13241][Yarn/Mesos] Fix Yarn/MesosResourceManager setting managed memory 
size into wrong configuration instance.
URL: https://github.com/apache/flink/pull/9105#discussion_r304699498
 
 

 ##########
 File path: 
flink-yarn-tests/src/test/java/org/apache/flink/yarn/YarnConfigurationITCase.java
 ##########
 @@ -187,6 +191,12 @@ public void testFlinkContainerMemory() throws Exception {
                                        assertThat(
                                                (double) 
taskManagerInfo.getHardwareDescription().getSizeOfJvmHeap() / (double) 
expectedHeadSize,
                                                is(closeTo(1.0, 0.15)));
+
+                                       final int defaultTaskManagerMemoryMB = 
ConfigurationUtils.getTaskManagerHeapMemory(configuration).getMebiBytes();
 
 Review comment:
   I kind of think it differently. 
   I think we already have `testCreateSlotsPerWorker` that checks the behavior 
of `updateTaskManagerConfigAndCreateWorkerSlotProfiles`. If we just set 
constant `defaultTaskManagerMemoryMB` and expect a corresponding constant 
`expectedManagedMemoryMB`, then later if we change the logic in 
`updateTaskManagerConfigAndCreateWorkerSlotProfiles `  that it calculates 
managed memory from task manager memory differently, we may have to also change 
this test case.

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