tillrohrmann commented on a change in pull request #9760: 
[FLINK-13982][runtime] Implement memory calculation logics
URL: https://github.com/apache/flink/pull/9760#discussion_r334001380
 
 

 ##########
 File path: 
flink-runtime/src/test/java/org/apache/flink/runtime/clusterframework/TaskExecutorResourceUtilsTest.java
 ##########
 @@ -0,0 +1,685 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.flink.runtime.clusterframework;
+
+import org.apache.flink.configuration.Configuration;
+import org.apache.flink.configuration.MemorySize;
+import org.apache.flink.configuration.NettyShuffleEnvironmentOptions;
+import org.apache.flink.configuration.TaskManagerOptions;
+import org.apache.flink.util.TestLogger;
+
+import org.junit.Test;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.function.Consumer;
+
+import static org.hamcrest.Matchers.greaterThanOrEqualTo;
+import static org.hamcrest.Matchers.is;
+import static org.hamcrest.Matchers.lessThanOrEqualTo;
+import static org.junit.Assert.assertThat;
+
+/**
+ * Tests for {@link TaskExecutorResourceUtils}.
+ */
+public class TaskExecutorResourceUtilsTest extends TestLogger {
+
+       private static final MemorySize TASK_HEAP_SIZE = 
MemorySize.parse("100m");
+       private static final MemorySize MANAGED_MEM_SIZE = 
MemorySize.parse("200m");
+       private static final MemorySize TOTAL_FLINK_MEM_SIZE = 
MemorySize.parse("800m");
+       private static final MemorySize TOTAL_PROCESS_MEM_SIZE = 
MemorySize.parse("1g");
+
+       private static final TaskExecutorResourceSpec TM_RESOURCE_SPEC = new 
TaskExecutorResourceSpec(
+               MemorySize.parse("1m"),
+               MemorySize.parse("2m"),
+               MemorySize.parse("3m"),
+               MemorySize.parse("4m"),
+               MemorySize.parse("5m"),
+               MemorySize.parse("6m"),
+               MemorySize.parse("7m"),
+               MemorySize.parse("8m"));
+
+       @Test
+       public void testGenerateDynamicConfigurations() {
+               String dynamicConfigsStr = 
TaskExecutorResourceUtils.generateDynamicConfigsStr(TM_RESOURCE_SPEC);
+               Map<String, String> configs = new HashMap<>();
+               String[] configStrs = dynamicConfigsStr.split(" ");
+               assertThat(configStrs.length % 2, is(0));
+               for (int i = 0; i < configStrs.length; ++i) {
+                       String configStr = configStrs[i];
+                       if (i % 2 == 0) {
+                               assertThat(configStr, is("-D"));
+                       } else {
+                               String[] configKV = configStr.split("=");
+                               assertThat(configKV.length, is(2));
+                               configs.put(configKV[0], configKV[1]);
+                       }
+               }
+
+               
assertThat(MemorySize.parse(configs.get(TaskManagerOptions.FRAMEWORK_HEAP_MEMORY.key())),
 is(TM_RESOURCE_SPEC.getFrameworkHeapSize()));
+               
assertThat(MemorySize.parse(configs.get(TaskManagerOptions.TASK_HEAP_MEMORY.key())),
 is(TM_RESOURCE_SPEC.getTaskHeapSize()));
+               
assertThat(MemorySize.parse(configs.get(TaskManagerOptions.TASK_OFF_HEAP_MEMORY.key())),
 is(TM_RESOURCE_SPEC.getTaskOffHeapSize()));
+               
assertThat(MemorySize.parse(configs.get(TaskManagerOptions.SHUFFLE_MEMORY_MAX.key())),
 is(TM_RESOURCE_SPEC.getShuffleMemSize()));
+               
assertThat(MemorySize.parse(configs.get(TaskManagerOptions.SHUFFLE_MEMORY_MIN.key())),
 is(TM_RESOURCE_SPEC.getShuffleMemSize()));
+               
assertThat(MemorySize.parse(configs.get(TaskManagerOptions.MANAGED_MEMORY_SIZE.key())),
 is(TM_RESOURCE_SPEC.getManagedMemorySize()));
+               
assertThat(MemorySize.parse(configs.get(TaskManagerOptions.MANAGED_MEMORY_OFFHEAP_SIZE.key())),
 is(TM_RESOURCE_SPEC.getOffHeapManagedMemorySize()));
+       }
+
+       @Test
+       public void testGenerateJvmParameters() throws Exception {
+               String jvmParamsStr = 
TaskExecutorResourceUtils.generateJvmParametersStr(TM_RESOURCE_SPEC);
+               MemorySize heapSizeMax = null;
+               MemorySize heapSizeMin = null;
+               MemorySize directSize = null;
+               MemorySize metaspaceSize = null;
+               for (String paramStr : jvmParamsStr.split(" ")) {
+                       if (paramStr.startsWith("-Xmx")) {
+                               heapSizeMax = 
MemorySize.parse(paramStr.substring("-Xmx".length()));
+                       } else if (paramStr.startsWith("-Xms")) {
+                               heapSizeMin = 
MemorySize.parse(paramStr.substring("-Xms".length()));
+                       } else if 
(paramStr.startsWith("-XX:MaxDirectMemorySize=")) {
+                               directSize = 
MemorySize.parse(paramStr.substring("-XX:MaxDirectMemorySize=".length()));
+                       } else if (paramStr.startsWith("-XX:MetaspaceSize=")) {
+                               metaspaceSize = 
MemorySize.parse(paramStr.substring("-XX:MetaspaceSize=".length()));
+                       } else {
+                               throw new Exception("Unknown JVM parameter: " + 
paramStr);
+                       }
+               }
+
+               assertThat(heapSizeMax, 
is(TM_RESOURCE_SPEC.getFrameworkHeapSize().add(TM_RESOURCE_SPEC.getTaskHeapSize()).add(TM_RESOURCE_SPEC.getOnHeapManagedMemorySize())));
+               assertThat(heapSizeMin, is(heapSizeMax));
+               assertThat(directSize, 
is(TM_RESOURCE_SPEC.getTaskOffHeapSize().add(TM_RESOURCE_SPEC.getShuffleMemSize())));
+               assertThat(metaspaceSize, 
is(TM_RESOURCE_SPEC.getJvmMetaspaceSize()));
+       }
+
+       @Test public void testConfigFrameworkHeapMemory() {
+               final MemorySize frameworkHeapSize = MemorySize.parse("100m");
+
+               Configuration conf = new Configuration();
+               conf.setString(TaskManagerOptions.FRAMEWORK_HEAP_MEMORY, 
frameworkHeapSize.getMebiBytes() + "m");
+
+               validateInAllConfigurations(conf, taskExecutorResourceSpec -> 
assertThat(taskExecutorResourceSpec.getFrameworkHeapSize(), 
is(frameworkHeapSize)));
+       }
+
+       @Test
+       public void testConfigTaskHeapMemory() {
+               final MemorySize taskHeapSize = MemorySize.parse("50m");
+
+               Configuration conf = new Configuration();
+               conf.setString(TaskManagerOptions.TASK_HEAP_MEMORY, 
taskHeapSize.getMebiBytes() + "m");
+
+               // validate in configurations without explicit task heap memory 
size,
+               // to avoid checking against overwritten task heap memory size
+               validateInConfigurationsWithoutExplicitTaskHeapMem(conf, 
taskExecutorResourceSpec -> 
assertThat(taskExecutorResourceSpec.getTaskHeapSize(), is(taskHeapSize)));
+       }
+
+       @Test
+       public void testConfigTaskOffheapMemory() {
+               final MemorySize taskOffHeapSize = MemorySize.parse("50m");
+
+               Configuration conf = new Configuration();
+               conf.setString(TaskManagerOptions.TASK_OFF_HEAP_MEMORY, 
taskOffHeapSize.getMebiBytes() + "m");
+
+               validateInAllConfigurations(conf, taskExecutorResourceSpec -> 
assertThat(taskExecutorResourceSpec.getTaskOffHeapSize(), is(taskOffHeapSize)));
+       }
+
+       @Test
+       public void testConfigShuffleMemoryRange() {
+               final MemorySize shuffleMin = MemorySize.parse("50m");
+               final MemorySize shuffleMax = MemorySize.parse("200m");
+
+               Configuration conf = new Configuration();
+               conf.setString(TaskManagerOptions.SHUFFLE_MEMORY_MAX, 
shuffleMax.getMebiBytes() + "m");
+               conf.setString(TaskManagerOptions.SHUFFLE_MEMORY_MIN, 
shuffleMin.getMebiBytes() + "m");
+
+               validateInAllConfigurations(conf, taskExecutorResourceSpec -> {
+                       
assertThat(taskExecutorResourceSpec.getShuffleMemSize().getBytes(), 
greaterThanOrEqualTo(shuffleMin.getBytes()));
+                       
assertThat(taskExecutorResourceSpec.getShuffleMemSize().getBytes(), 
lessThanOrEqualTo(shuffleMax.getBytes()));
+               });
+       }
+
+       @Test
+       public void testConfigShuffleMemoryRangeFailure() {
+               final MemorySize shuffleMin = MemorySize.parse("200m");
+               final MemorySize shuffleMax = MemorySize.parse("50m");
+
+               Configuration conf = new Configuration();
+               conf.setString(TaskManagerOptions.SHUFFLE_MEMORY_MAX, 
shuffleMax.getMebiBytes() + "m");
+               conf.setString(TaskManagerOptions.SHUFFLE_MEMORY_MIN, 
shuffleMin.getMebiBytes() + "m");
+
+               validateFailInAllConfigurations(conf);
+       }
+
+       @Test
+       public void testConfigShuffleMemoryFraction() {
+               final MemorySize shuffleMin = MemorySize.parse("0m");
+               final MemorySize shuffleMax = MemorySize.parse("1t");
+               final float fraction = 0.2f;
+
+               Configuration conf = new Configuration();
+               conf.setString(TaskManagerOptions.SHUFFLE_MEMORY_MAX, 
shuffleMax.getMebiBytes() + "m");
+               conf.setString(TaskManagerOptions.SHUFFLE_MEMORY_MIN, 
shuffleMin.getMebiBytes() + "m");
+               conf.setFloat(TaskManagerOptions.SHUFFLE_MEMORY_FRACTION, 
fraction);
+
+               // validate in configurations without explicit total 
flink/process memory, otherwise explicit configured
+               // shuffle memory fraction might conflict with total 
flink/process memory minus other memory sizes
+               validateInConfigWithExplicitTaskHeapAndManagedMem(conf, 
taskExecutorResourceSpec ->
+                       
assertThat(taskExecutorResourceSpec.getShuffleMemSize(), 
is(taskExecutorResourceSpec.getTotalFlinkMemorySize().multiply(fraction))));
+       }
+
+       @Test
+       public void testConfigShuffleMemoryFractionFailure() {
+               Configuration conf = new Configuration();
+               conf.setFloat(TaskManagerOptions.SHUFFLE_MEMORY_FRACTION, 
-0.1f);
+               validateFailInAllConfigurations(conf);
+
+               conf.setFloat(TaskManagerOptions.SHUFFLE_MEMORY_FRACTION, 1.0f);
+               validateFailInAllConfigurations(conf);
+       }
+
+       @Test
+       @SuppressWarnings("deprecation")
+       public void testConfigShuffleMemoryLegacyRangeFraction() {
+               final MemorySize shuffleMin = MemorySize.parse("50m");
+               final MemorySize shuffleMax = MemorySize.parse("200m");
+               final float fraction = 0.2f;
+
+               Configuration conf = new Configuration();
+               
conf.setString(NettyShuffleEnvironmentOptions.NETWORK_BUFFERS_MEMORY_MIN, 
shuffleMin.getMebiBytes() + "m");
+               
conf.setString(NettyShuffleEnvironmentOptions.NETWORK_BUFFERS_MEMORY_MAX, 
shuffleMax.getMebiBytes() + "m");
+
+               validateInAllConfigurations(conf, taskExecutorResourceSpec -> {
+                       
assertThat(taskExecutorResourceSpec.getShuffleMemSize().getBytes(), 
greaterThanOrEqualTo(shuffleMin.getBytes()));
+                       
assertThat(taskExecutorResourceSpec.getShuffleMemSize().getBytes(), 
lessThanOrEqualTo(shuffleMax.getBytes()));
+               });
+
+               
conf.setString(NettyShuffleEnvironmentOptions.NETWORK_BUFFERS_MEMORY_MIN, "0m");
+               
conf.setString(NettyShuffleEnvironmentOptions.NETWORK_BUFFERS_MEMORY_MAX, "1t");
+               
conf.setFloat(NettyShuffleEnvironmentOptions.NETWORK_BUFFERS_MEMORY_FRACTION, 
fraction);
+
+               validateInConfigWithExplicitTaskHeapAndManagedMem(conf, 
taskExecutorResourceSpec ->
+                       
assertThat(taskExecutorResourceSpec.getShuffleMemSize(), 
is(taskExecutorResourceSpec.getTotalFlinkMemorySize().multiply(fraction))));
+       }
+
+       @Test
+       @SuppressWarnings("deprecation")
+       public void testConfigShuffleMemoryLegacyNumOfBuffers() {
+               final MemorySize pageSize = MemorySize.parse("32k");
+               final int numOfBuffers = 1024;
+               final MemorySize shuffleSize = pageSize.multiply(numOfBuffers);
+
+               Configuration conf = new Configuration();
+               conf.setString(TaskManagerOptions.MEMORY_SEGMENT_SIZE, 
pageSize.getKibiBytes() + "k");
+               
conf.setInteger(NettyShuffleEnvironmentOptions.NETWORK_NUM_BUFFERS, 
numOfBuffers);
+
+               // validate in configurations without explicit total 
flink/process memory, otherwise explicit configured
+               // shuffle memory size might conflict with total flink/process 
memory minus other memory sizes
+               validateInConfigWithExplicitTaskHeapAndManagedMem(conf, 
taskExecutorResourceSpec ->
+                       
assertThat(taskExecutorResourceSpec.getShuffleMemSize(), is(shuffleSize)));
+       }
+
+       @Test
+       public void testConfigManagedMemorySize() {
+               final MemorySize managedMemSize = MemorySize.parse("100m");
+
+               Configuration conf = new Configuration();
+               conf.setString(TaskManagerOptions.MANAGED_MEMORY_SIZE, 
managedMemSize.getMebiBytes() + "m");
+
+               // validate in configurations without explicit managed memory 
size,
+               // to avoid checking against overwritten managed memory size
+               validateInConfigurationsWithoutExplicitManagedMem(conf, 
taskExecutorResourceSpec -> 
assertThat(taskExecutorResourceSpec.getManagedMemorySize(), 
is(managedMemSize)));
+       }
+
+       @Test
+       @SuppressWarnings("deprecation")
+       public void testConfigManagedMemoryLegacySize() {
+               final MemorySize managedMemSize = MemorySize.parse("100m");
+
+               Configuration conf = new Configuration();
+               conf.setString(TaskManagerOptions.LEGACY_MANAGED_MEMORY_SIZE, 
managedMemSize.getMebiBytes() + "m");
+
+               // validate in configurations without explicit managed memory 
size,
+               // to avoid checking against overwritten managed memory size
+               validateInConfigurationsWithoutExplicitManagedMem(conf, 
taskExecutorResourceSpec -> 
assertThat(taskExecutorResourceSpec.getManagedMemorySize(), 
is(managedMemSize)));
+       }
+
+       @Test
+       public void testConfigManagedMemoryFraction() {
+               final float fraction = 0.5f;
+
+               Configuration conf = new Configuration();
+               conf.setFloat(TaskManagerOptions.MANAGED_MEMORY_FRACTION, 
fraction);
+
+               // managed memory fraction is only used when managed memory 
size is not explicitly configured
+               validateInConfigurationsWithoutExplicitManagedMem(conf, 
taskExecutorResourceSpec ->
+                       
assertThat(taskExecutorResourceSpec.getManagedMemorySize(), 
is(taskExecutorResourceSpec.getTotalFlinkMemorySize().multiply(fraction))));
+       }
+
+       @Test
+       public void testConfigManagedMemoryFractionFailure() {
+               final Configuration conf = new Configuration();
+               conf.setFloat(TaskManagerOptions.MANAGED_MEMORY_FRACTION, 
-0.1f);
+               validateFailInConfigurationsWithoutExplicitManagedMem(conf);
+
+               conf.setFloat(TaskManagerOptions.MANAGED_MEMORY_FRACTION, 1.0f);
+               validateFailInConfigurationsWithoutExplicitManagedMem(conf);
+       }
+
+       @Test
+       @SuppressWarnings("deprecation")
+       public void testConfigManagedMemoryLegacyFraction() {
+               final float fraction = 0.5f;
+
+               Configuration conf = new Configuration();
+               
conf.setFloat(TaskManagerOptions.LEGACY_MANAGED_MEMORY_FRACTION, fraction);
+
+               // managed memory fraction is only used when managed memory 
size is not explicitly configured
+               validateInConfigurationsWithoutExplicitManagedMem(conf, 
taskExecutorResourceSpec ->
+                       
assertThat(taskExecutorResourceSpec.getManagedMemorySize(), 
is(taskExecutorResourceSpec.getTotalFlinkMemorySize().multiply(fraction))));
+       }
+
+       @Test
+       public void testConfigOffHeapManagedMemorySize() {
+               final MemorySize offHeapSize = MemorySize.parse("20m");
+
+               Configuration conf = new Configuration();
+               conf.setString(TaskManagerOptions.MANAGED_MEMORY_OFFHEAP_SIZE, 
offHeapSize.getMebiBytes() + "m");
+
+               validateInAllConfigurations(conf, taskExecutorResourceSpec -> {
+                       
assertThat(taskExecutorResourceSpec.getOffHeapManagedMemorySize(), 
is(offHeapSize));
+                       
assertThat(taskExecutorResourceSpec.getOnHeapManagedMemorySize(), 
is(taskExecutorResourceSpec.getManagedMemorySize().subtract(taskExecutorResourceSpec.getOffHeapManagedMemorySize())));
+               });
+       }
+
+       @Test
+       public void testConfigOffHeapManagedMemorySizeFailure() {
+               final MemorySize offHeapSize = MemorySize.parse("1t");
+
+               Configuration conf = new Configuration();
+               conf.setString(TaskManagerOptions.MANAGED_MEMORY_OFFHEAP_SIZE, 
offHeapSize.getMebiBytes() + "m");
+
+               validateFailInAllConfigurations(conf);
+       }
+
+       @Test
+       public void testConfigOffHeapManagedMemoryFraction() {
+               final float fraction = 0.5f;
+
+               Configuration conf = new Configuration();
+               
conf.setFloat(TaskManagerOptions.MANAGED_MEMORY_OFFHEAP_FRACTION, fraction);
+
+               validateInAllConfigurations(conf, taskExecutorResourceSpec -> {
+                       
assertThat(taskExecutorResourceSpec.getOffHeapManagedMemorySize(), 
is(taskExecutorResourceSpec.getManagedMemorySize().multiply(fraction)));
+                       
assertThat(taskExecutorResourceSpec.getOnHeapManagedMemorySize(), 
is(taskExecutorResourceSpec.getManagedMemorySize().subtract(taskExecutorResourceSpec.getOffHeapManagedMemorySize())));
+               });
+       }
+
+       @Test
+       public void testConfigOffHeapManagedMemoryFractionFailure() {
+               // negative off-heap managed memory fraction means not 
configured, if off-heap managed memory size is also not configured,
+               // legacy 'taskmanager.memory.off-heap' will be used to set 
managed memory to either all on-heap or all off-heap
+               Configuration conf = new Configuration();
+               
conf.setFloat(TaskManagerOptions.MANAGED_MEMORY_OFFHEAP_FRACTION, 1.1f);
+               validateFailInAllConfigurations(conf);
+       }
+
+       @Test
+       @SuppressWarnings("deprecation")
+       public void testConfigOffHeapManagedMemoryLegacy() {
+               Configuration conf = new Configuration();
+               
conf.setFloat(TaskManagerOptions.MANAGED_MEMORY_OFFHEAP_FRACTION, -1.0f);
+
+               conf.setBoolean(TaskManagerOptions.MEMORY_OFF_HEAP, true);
+               validateInAllConfigurations(conf, taskExecutorResourceSpec -> {
+                       
assertThat(taskExecutorResourceSpec.getOffHeapManagedMemorySize(), 
is(taskExecutorResourceSpec.getManagedMemorySize()));
+                       
assertThat(taskExecutorResourceSpec.getOnHeapManagedMemorySize(), is(new 
MemorySize(0L)));
+               });
+
+               conf.setBoolean(TaskManagerOptions.MEMORY_OFF_HEAP, false);
+               validateInAllConfigurations(conf, taskExecutorResourceSpec -> {
+                       
assertThat(taskExecutorResourceSpec.getOnHeapManagedMemorySize(), 
is(taskExecutorResourceSpec.getManagedMemorySize()));
+                       
assertThat(taskExecutorResourceSpec.getOffHeapManagedMemorySize(), is(new 
MemorySize(0L)));
+               });
+       }
+
+       @Test
+       public void testConfigJvmMetaspaceSize() {
+               final MemorySize jvmMetaspaceSize = MemorySize.parse("50m");
+
+               Configuration conf = new Configuration();
+               conf.setString(TaskManagerOptions.JVM_METASPACE, 
jvmMetaspaceSize.getMebiBytes() + "m");
+
+               validateInAllConfigurations(conf, taskExecutorResourceSpec -> 
assertThat(taskExecutorResourceSpec.getJvmMetaspaceSize(), 
is(jvmMetaspaceSize)));
+       }
+
+       @Test
+       public void testConfigJvmOverheadRange() {
+               final MemorySize minSize = MemorySize.parse("50m");
+               final MemorySize maxSize = MemorySize.parse("200m");
+
+               Configuration conf = new Configuration();
+               conf.setString(TaskManagerOptions.JVM_OVERHEAD_MAX, 
maxSize.getMebiBytes() + "m");
+               conf.setString(TaskManagerOptions.JVM_OVERHEAD_MIN, 
minSize.getMebiBytes() + "m");
+
+               validateInAllConfigurations(conf, taskExecutorResourceSpec -> {
+                       
assertThat(taskExecutorResourceSpec.getJvmOverheadSize().getBytes(),
+                               greaterThanOrEqualTo(minSize.getBytes()));
+                       
assertThat(taskExecutorResourceSpec.getJvmOverheadSize().getBytes(), 
lessThanOrEqualTo(maxSize.getBytes()));
+               });
+       }
+
+       @Test
+       public void testConfigJvmOverheadRangeFailure() {
+               final MemorySize minSize = MemorySize.parse("200m");
+               final MemorySize maxSize = MemorySize.parse("50m");
+
+               Configuration conf = new Configuration();
+               conf.setString(TaskManagerOptions.JVM_OVERHEAD_MAX, 
maxSize.getMebiBytes() + "m");
+               conf.setString(TaskManagerOptions.JVM_OVERHEAD_MIN, 
minSize.getMebiBytes() + "m");
+
+               validateFailInAllConfigurations(conf);
+       }
+
+       @Test
+       public void testConfigJvmOverheadFraction() {
+               final MemorySize minSize = MemorySize.parse("0m");
+               final MemorySize maxSize = MemorySize.parse("1t");
+               final float fraction = 0.2f;
+
+               Configuration conf = new Configuration();
+               conf.setString(TaskManagerOptions.JVM_OVERHEAD_MAX, 
maxSize.getMebiBytes() + "m");
+               conf.setString(TaskManagerOptions.JVM_OVERHEAD_MIN, 
minSize.getMebiBytes() + "m");
+               conf.setFloat(TaskManagerOptions.JVM_OVERHEAD_FRACTION, 
fraction);
+
+               validateInAllConfigurations(conf, taskExecutorResourceSpec ->
+                       
assertThat(taskExecutorResourceSpec.getJvmOverheadSize(), 
is(taskExecutorResourceSpec.getTotalProcessMemorySize().multiply(fraction))));
+       }
+
+       @Test
+       public void testConfigJvmOverheadFractionFailure() {
+               final Configuration conf = new Configuration();
+               conf.setFloat(TaskManagerOptions.JVM_OVERHEAD_FRACTION, -0.1f);
+               validateFailInConfigurationsWithoutExplicitManagedMem(conf);
+
+               conf.setFloat(TaskManagerOptions.JVM_OVERHEAD_FRACTION, 1.0f);
+               validateFailInConfigurationsWithoutExplicitManagedMem(conf);
 
 Review comment:
   two test cases

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