mhansonp commented on code in PR #7493:
URL: https://github.com/apache/geode/pull/7493#discussion_r871852126


##########
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/execute/PRClientServerRegionFunctionExecutionNoSingleHopDistributedTest.java:
##########
@@ -657,191 +710,162 @@ private static void 
serverMultiKeyExecutionOnASingleBucket(Boolean isByName) {
     }
     DistributedSystem.setThreadsSocketPolicy(false);
     for (String o : testKeysSet) {
-      try {
-        Set<String> singleKeySet = Collections.singleton(o);
-        Function function = new TestFunction(true, TEST_FUNCTION2);
-        FunctionService.registerFunction(function);
-        Execution dataSet = FunctionService.onRegion(region);
-        ResultCollector rc1 = execute(dataSet, singleKeySet, Boolean.TRUE, 
function, isByName);
-        List l = ((List) rc1.getResult());
-        assertEquals(1, l.size());
-
-        ResultCollector rc2 =
-            execute(dataSet, singleKeySet, new HashSet<>(singleKeySet), 
function, isByName);
-        List l2 = ((List) rc2.getResult());
-
-        assertEquals(1, l2.size());
-        List subList = (List) l2.iterator().next();
-        assertEquals(1, subList.size());
-        assertEquals(region.get(singleKeySet.iterator().next()), 
subList.iterator().next());
-      } catch (Exception expected) {
-        logger.info("Exception : " + expected.getMessage());
-        expected.printStackTrace();
-        fail("Test failed after the put operation");
-      }
+      Set<String> singleKeySet = Collections.singleton(o);
+      Function<Object> function = new TestFunction<>(true, TEST_FUNCTION2);
+      FunctionService.registerFunction(function);
+      Execution dataSet = FunctionService.onRegion(region);
+      ResultCollector<?, ?> rc1 = execute(dataSet, singleKeySet, Boolean.TRUE, 
function, isByName);
+      List<?> l = (List<?>) rc1.getResult();
+      assertThat(l).hasSize(1);
+
+      ResultCollector<?, ?> rc2 =
+          execute(dataSet, singleKeySet, new HashSet<>(singleKeySet), 
function, isByName);
+      List<?> l2 = (List<?>) rc2.getResult();
+
+      assertThat(l2).hasSize(1);
+      List<Integer> subList = (List<Integer>) l2.iterator().next();
+      assertThat(subList).hasSize(1);
+      
assertThat(subList).containsOnly(region.get(singleKeySet.iterator().next()));
     }
   }
 
   private static void serverMultiKeyExecution(Boolean isByName) {
     Region<String, Integer> region = cache.getRegion(PartitionedRegionName);
-    assertNotNull(region);
+    assertThat(region).isNotNull();
     final HashSet<String> testKeysSet = new HashSet<>();
     for (int i = (totalNumBuckets * 2); i > 0; i--) {
       testKeysSet.add("execKey-" + i);
     }
     DistributedSystem.setThreadsSocketPolicy(false);
-    Function function = new TestFunction(true, TEST_FUNCTION2);
+    Function<Object> function = new TestFunction<>(true, TEST_FUNCTION2);
     FunctionService.registerFunction(function);
     Execution dataSet = FunctionService.onRegion(region);
-    try {
-      int j = 0;
-      HashSet<Integer> origVals = new HashSet<>();
-      for (String element : testKeysSet) {
-        Integer val = j++;
-        origVals.add(val);
-        region.put(element, val);
-      }
-      ResultCollector rc1 = execute(dataSet, testKeysSet, Boolean.TRUE, 
function, isByName);
-      List l = ((List) rc1.getResult());
-      logger.info("Result size : " + l.size());
-      assertEquals(3, l.size());
-      for (Object item : l) {
-        assertEquals(Boolean.TRUE, item);
-      }
 
-      ResultCollector rc2 = execute(dataSet, testKeysSet, testKeysSet, 
function, isByName);
-      List l2 = ((List) rc2.getResult());
-      assertEquals(3, l2.size());
-      HashSet<Integer> foundVals = new HashSet<>();
-      for (Object value : l2) {
-        ArrayList subL = (ArrayList) value;
-        assertTrue(subL.size() > 0);
-        for (Object o : subL) {
-          assertTrue(foundVals.add((Integer) o));
-        }
-      }
-      assertEquals(origVals, foundVals);
-
-    } catch (Exception e) {
-      Assert.fail("Test failed after the put operation", e);
+    int j = 0;
+    HashSet<Integer> origVals = new HashSet<>();
+    for (String element : testKeysSet) {
+      Integer val = j++;
+      origVals.add(val);
+      region.put(element, val);
+    }
+    ResultCollector<?, ?> rc1 = execute(dataSet, testKeysSet, Boolean.TRUE, 
function, isByName);
+    List<?> l = (List<?>) rc1.getResult();
+    assertThat(l).hasSize(3);
+    for (Object item : l) {
+      assertThat(item).isEqualTo(Boolean.TRUE);

Review Comment:
   I think "true" works instead of "Boolean.TRUE"



##########
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/execute/PRClientServerRegionFunctionExecutionNoSingleHopDistributedTest.java:
##########
@@ -520,132 +584,121 @@ private static void putOperation() {
   }
 
   private void createScenario() {
-    ArrayList commonAttributes =
+    ArrayList<Object> commonAttributes =
         createCommonServerAttributes("TestPartitionedRegion", null, 0, null);
     createClientServerScenarioNoSingleHop(commonAttributes, 20, 20, 20);
   }
 
+  private void createScenarioWithClientConnectTimeout(int connectTimeout, int 
maxThreads) {
+    ArrayList<Object> commonAttributes =
+        createCommonServerAttributes("TestPartitionedRegion", null, 0, null);
+    createClientServerScenarioNoSingleHop(commonAttributes, 20, 20, 20, 
maxThreads, connectTimeout);
+  }
+
+
   private void createScenarioForBucketFilter() {
-    ArrayList commonAttributes = 
createCommonServerAttributes("TestPartitionedRegion",
+    ArrayList<Object> commonAttributes = 
createCommonServerAttributes("TestPartitionedRegion",
         new BucketFilterPRResolver(), 0, null);
     createClientServerScenarioNoSingleHop(commonAttributes, 20, 20, 20);
   }
 
   private static void checkBucketsOnServer() {
     PartitionedRegion region = (PartitionedRegion) 
cache.getRegion(PartitionedRegionName);
-    HashMap localBucket2RegionMap = (HashMap) 
region.getDataStore().getSizeLocally();
+    HashMap<Integer, Integer> localBucket2RegionMap =
+        (HashMap<Integer, Integer>) region.getDataStore().getSizeLocally();
     logger.info(
         "Size of the " + PartitionedRegionName + " in this VM :- " + 
localBucket2RegionMap.size());
-    Set entrySet = localBucket2RegionMap.entrySet();
-    assertNotNull(entrySet);
+    Set<Map.Entry<Integer, Integer>> entrySet = 
localBucket2RegionMap.entrySet();
+    assertThat(entrySet).isNotNull();
   }
 
   private static void serverAllKeyExecution(Boolean isByName) {
     Region<String, Integer> region = cache.getRegion(PartitionedRegionName);
-    assertNotNull(region);
+    assertThat(region).isNotNull();
     final HashSet<String> testKeysSet = new HashSet<>();
     for (int i = (totalNumBuckets / 2); i > 0; i--) {
       testKeysSet.add("execKey-" + i);
     }
     DistributedSystem.setThreadsSocketPolicy(false);
-    Function function = new TestFunction(true, TEST_FUNCTION2);
+    Function<Object> function = new TestFunction<>(true, TEST_FUNCTION2);
     FunctionService.registerFunction(function);
     Execution dataSet = FunctionService.onRegion(region);
-    try {
-      int j = 0;
-      HashSet<Integer> origVals = new HashSet<>();
-      for (String item : testKeysSet) {
-        Integer val = j++;
-        origVals.add(val);
-        region.put(item, val);
-      }
-      ResultCollector rc1 = executeOnAll(dataSet, Boolean.TRUE, function, 
isByName);
-      List resultList = (List) rc1.getResult();
-      logger.info("Result size : " + resultList.size());
-      logger.info("Result are SSSS : " + resultList);
-      assertEquals(3, resultList.size());
-
-      for (Object result : resultList) {
-        assertEquals(Boolean.TRUE, result);
-      }
-      ResultCollector rc2 = executeOnAll(dataSet, testKeysSet, function, 
isByName);
-      List l2 = ((List) rc2.getResult());
-      assertEquals(3, l2.size());
-      HashSet<Integer> foundVals = new HashSet<>();
-      for (Object value : l2) {
-        ArrayList subL = (ArrayList) (value);
-        assertTrue(subL.size() > 0);
-        for (Object o : subL) {
-          assertTrue(foundVals.add((Integer) o));
-        }
-      }
-      assertEquals(origVals, foundVals);
 
-    } catch (Exception e) {
-      Assert.fail("Test failed after the put operation", e);
+    int j = 0;
+    HashSet<Integer> origVals = new HashSet<>();
+    for (String item : testKeysSet) {
+      Integer val = j++;
+      origVals.add(val);
+      region.put(item, val);
+    }
+    ResultCollector<?, ?> rc1 = executeOnAll(dataSet, Boolean.TRUE, function, 
isByName);
+    List<?> resultList = (List<?>) rc1.getResult();
+    assertThat(resultList).hasSize(3);
 
+    for (Object result : resultList) {
+      assertThat(result).isEqualTo(Boolean.TRUE);
     }
+    ResultCollector<?, ?> rc2 = executeOnAll(dataSet, testKeysSet, function, 
isByName);
+    List<?> l2 = (List<?>) rc2.getResult();
+    assertThat(l2).hasSize(3);
+    HashSet<Integer> foundVals = new HashSet<>();
+    for (Object value : l2) {
+      List<?> subL = (List<?>) value;
+      assertThat(subL).hasSizeGreaterThan(0);
+      for (Object o : subL) {
+        assertThat(foundVals.add((Integer) o)).isTrue();
+      }
+    }
+    assertThat(foundVals).containsExactlyInAnyOrderElementsOf(origVals);
   }
 
   public static void getAll() {
     Region<String, Integer> region = cache.getRegion(PartitionedRegionName);
-    assertNotNull(region);
+    assertThat(region).isNotNull();
     final List<String> testKeysList = new ArrayList<>();
     for (int i = (totalNumBuckets * 3); i > 0; i--) {
       testKeysList.add("execKey-" + i);
     }
     DistributedSystem.setThreadsSocketPolicy(false);
-    try {
-      int j = 0;
-      Map<String, Integer> origVals = new HashMap<>();
-      for (String key : testKeysList) {
-        Integer val = j++;
-        origVals.put(key, val);
-        region.put(key, val);
-      }
-      Map resultMap = region.getAll(testKeysList);
-      assertEquals(resultMap, origVals);
-      Wait.pause(2000);
-      Map secondResultMap = region.getAll(testKeysList);
-      assertEquals(secondResultMap, origVals);
-
-    } catch (Exception e) {
-      Assert.fail("Test failed after the put operation", e);
-
+    int j = 0;
+    Map<String, Integer> origVals = new HashMap<>();
+    for (String key : testKeysList) {
+      Integer val = j++;
+      origVals.put(key, val);
+      region.put(key, val);
     }
+    Map<String, Integer> resultMap = region.getAll(testKeysList);
+    assertThat(resultMap).containsExactlyInAnyOrderEntriesOf(origVals);
+    Wait.pause(2000);

Review Comment:
   why not use awaitility here? using a pause is dangerous.



##########
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/execute/PRClientServerRegionFunctionExecutionNoSingleHopDistributedTest.java:
##########
@@ -657,191 +710,162 @@ private static void 
serverMultiKeyExecutionOnASingleBucket(Boolean isByName) {
     }
     DistributedSystem.setThreadsSocketPolicy(false);
     for (String o : testKeysSet) {
-      try {
-        Set<String> singleKeySet = Collections.singleton(o);
-        Function function = new TestFunction(true, TEST_FUNCTION2);
-        FunctionService.registerFunction(function);
-        Execution dataSet = FunctionService.onRegion(region);
-        ResultCollector rc1 = execute(dataSet, singleKeySet, Boolean.TRUE, 
function, isByName);
-        List l = ((List) rc1.getResult());
-        assertEquals(1, l.size());
-
-        ResultCollector rc2 =
-            execute(dataSet, singleKeySet, new HashSet<>(singleKeySet), 
function, isByName);
-        List l2 = ((List) rc2.getResult());
-
-        assertEquals(1, l2.size());
-        List subList = (List) l2.iterator().next();
-        assertEquals(1, subList.size());
-        assertEquals(region.get(singleKeySet.iterator().next()), 
subList.iterator().next());
-      } catch (Exception expected) {
-        logger.info("Exception : " + expected.getMessage());
-        expected.printStackTrace();
-        fail("Test failed after the put operation");
-      }
+      Set<String> singleKeySet = Collections.singleton(o);
+      Function<Object> function = new TestFunction<>(true, TEST_FUNCTION2);
+      FunctionService.registerFunction(function);
+      Execution dataSet = FunctionService.onRegion(region);
+      ResultCollector<?, ?> rc1 = execute(dataSet, singleKeySet, Boolean.TRUE, 
function, isByName);
+      List<?> l = (List<?>) rc1.getResult();
+      assertThat(l).hasSize(1);
+
+      ResultCollector<?, ?> rc2 =
+          execute(dataSet, singleKeySet, new HashSet<>(singleKeySet), 
function, isByName);
+      List<?> l2 = (List<?>) rc2.getResult();
+
+      assertThat(l2).hasSize(1);
+      List<Integer> subList = (List<Integer>) l2.iterator().next();
+      assertThat(subList).hasSize(1);
+      
assertThat(subList).containsOnly(region.get(singleKeySet.iterator().next()));
     }
   }
 
   private static void serverMultiKeyExecution(Boolean isByName) {
     Region<String, Integer> region = cache.getRegion(PartitionedRegionName);
-    assertNotNull(region);
+    assertThat(region).isNotNull();
     final HashSet<String> testKeysSet = new HashSet<>();
     for (int i = (totalNumBuckets * 2); i > 0; i--) {
       testKeysSet.add("execKey-" + i);
     }
     DistributedSystem.setThreadsSocketPolicy(false);
-    Function function = new TestFunction(true, TEST_FUNCTION2);
+    Function<Object> function = new TestFunction<>(true, TEST_FUNCTION2);
     FunctionService.registerFunction(function);
     Execution dataSet = FunctionService.onRegion(region);
-    try {
-      int j = 0;
-      HashSet<Integer> origVals = new HashSet<>();
-      for (String element : testKeysSet) {
-        Integer val = j++;
-        origVals.add(val);
-        region.put(element, val);
-      }
-      ResultCollector rc1 = execute(dataSet, testKeysSet, Boolean.TRUE, 
function, isByName);
-      List l = ((List) rc1.getResult());
-      logger.info("Result size : " + l.size());
-      assertEquals(3, l.size());
-      for (Object item : l) {
-        assertEquals(Boolean.TRUE, item);
-      }
 
-      ResultCollector rc2 = execute(dataSet, testKeysSet, testKeysSet, 
function, isByName);
-      List l2 = ((List) rc2.getResult());
-      assertEquals(3, l2.size());
-      HashSet<Integer> foundVals = new HashSet<>();
-      for (Object value : l2) {
-        ArrayList subL = (ArrayList) value;
-        assertTrue(subL.size() > 0);
-        for (Object o : subL) {
-          assertTrue(foundVals.add((Integer) o));
-        }
-      }
-      assertEquals(origVals, foundVals);
-
-    } catch (Exception e) {
-      Assert.fail("Test failed after the put operation", e);
+    int j = 0;
+    HashSet<Integer> origVals = new HashSet<>();
+    for (String element : testKeysSet) {
+      Integer val = j++;
+      origVals.add(val);
+      region.put(element, val);
+    }
+    ResultCollector<?, ?> rc1 = execute(dataSet, testKeysSet, Boolean.TRUE, 
function, isByName);
+    List<?> l = (List<?>) rc1.getResult();
+    assertThat(l).hasSize(3);
+    for (Object item : l) {
+      assertThat(item).isEqualTo(Boolean.TRUE);
+    }
 
+    ResultCollector<?, ?> rc2 = execute(dataSet, testKeysSet, testKeysSet, 
function, isByName);
+    List<?> l2 = (List<?>) rc2.getResult();
+    assertThat(l2).hasSize(3);
+    HashSet<Integer> foundVals = new HashSet<>();
+    for (Object value : l2) {
+      List<?> subL = (List<?>) value;
+      assertThat(subL).hasSizeGreaterThan(0);
+      for (Object o : subL) {
+        assertThat(foundVals.add((Integer) o)).isTrue();
+      }
     }
+    assertThat(foundVals).containsExactlyInAnyOrderElementsOf(origVals);
   }
 
 
   private static void serverMultiKeyExecutionSocketTimeOut(Boolean isByName) {
     Region<String, Integer> region = cache.getRegion(PartitionedRegionName);
-    assertNotNull(region);
+    assertThat(region).isNotNull();
     final HashSet<String> testKeysSet = new HashSet<>();
     for (int i = (totalNumBuckets * 2); i > 0; i--) {
       testKeysSet.add("execKey-" + i);
     }
     DistributedSystem.setThreadsSocketPolicy(false);
-    Function function = new TestFunction(true, 
TestFunction.TEST_FUNCTION_SOCKET_TIMEOUT);
+    Function<Object> function = new TestFunction<>(true, 
TestFunction.TEST_FUNCTION_SOCKET_TIMEOUT);
     FunctionService.registerFunction(function);
     Execution dataSet = FunctionService.onRegion(region);
-    try {
-      int j = 0;
-      for (String value : testKeysSet) {
-        Integer val = j++;
-        region.put(value, val);
-      }
-      ResultCollector rc1 = execute(dataSet, testKeysSet, Boolean.TRUE, 
function, isByName);
-      List l = ((List) rc1.getResult());
-      logger.info("Result size : " + l.size());
-      assertEquals(3, l.size());
-      for (Object o : l) {
-        assertEquals(Boolean.TRUE, o);
-      }
-
-    } catch (Exception e) {
-      Assert.fail("Test failed after the function execution", e);
 
+    int j = 0;
+    for (String value : testKeysSet) {
+      Integer val = j++;
+      region.put(value, val);
+    }
+    ResultCollector<?, ?> rc1 = execute(dataSet, testKeysSet, Boolean.TRUE, 
function, isByName);
+    List<?> l = (List<?>) rc1.getResult();
+    logger.info("Result size : " + l.size());
+    assertThat(l).hasSize(3);
+    for (Object o : l) {
+      assertThat(o).isEqualTo(Boolean.TRUE);
     }
   }
 
   private static void serverSingleKeyExecutionSocketTimeOut(Boolean isByName) {
     Region<String, Integer> region = cache.getRegion(PartitionedRegionName);
-    assertNotNull(region);
+    assertThat(region).isNotNull();
     final String testKey = "execKey";
     final Set<String> testKeysSet = new HashSet<>();
     testKeysSet.add(testKey);
     DistributedSystem.setThreadsSocketPolicy(false);
 
-    Function function = new TestFunction(true, 
TestFunction.TEST_FUNCTION_SOCKET_TIMEOUT);
+    Function<Object> function = new TestFunction<>(true, 
TestFunction.TEST_FUNCTION_SOCKET_TIMEOUT);
     FunctionService.registerFunction(function);
     Execution dataSet = FunctionService.onRegion(region);
 
     region.put(testKey, 1);
-    try {
-      ResultCollector rs = execute(dataSet, testKeysSet, Boolean.TRUE, 
function, isByName);
-      assertEquals(Boolean.TRUE, ((List) rs.getResult()).get(0));
 
-      ResultCollector rs2 = execute(dataSet, testKeysSet, testKey, function, 
isByName);
-      assertEquals(testKey, ((List) rs2.getResult()).get(0));
+    ResultCollector<?, ?> rs = execute(dataSet, testKeysSet, Boolean.TRUE, 
function, isByName);
+    assertThat(((List<?>) rs.getResult()).get(0)).isEqualTo(Boolean.TRUE);
 
-    } catch (Exception ex) {
-      ex.printStackTrace();
-      logger.info("Exception : ", ex);
-      Assert.fail("Test failed after the put operation", ex);
-    }
+    ResultCollector<?, ?> rs2 = execute(dataSet, testKeysSet, testKey, 
function, isByName);
+    assertThat(((List<?>) rs2.getResult()).get(0)).isEqualTo(testKey);
   }
 
   private static void serverMultiKeyExecution_Inline() {
     Region<String, Integer> region = cache.getRegion(PartitionedRegionName);
-    assertNotNull(region);
+    assertThat(region).isNotNull();
     final HashSet<String> testKeysSet = new HashSet<>();
     for (int i = (totalNumBuckets * 2); i > 0; i--) {
       testKeysSet.add("execKey-" + i);
     }
     DistributedSystem.setThreadsSocketPolicy(false);
     Execution dataSet = FunctionService.onRegion(region);
-    try {
-      int j = 0;
-      for (String value : testKeysSet) {
-        Integer val = j++;
-        region.put(value, val);
-      }
-      ResultCollector rc1 =
-          
dataSet.withFilter(testKeysSet).setArguments(Boolean.TRUE).execute(new 
FunctionAdapter() {
-            @Override
-            public void execute(FunctionContext context) {
-              @SuppressWarnings("unchecked")
-              final ResultSender<Object> resultSender = 
context.getResultSender();
-              if (context.getArguments() instanceof String) {
-                resultSender.lastResult("Success");
-              } else if (context.getArguments() instanceof Boolean) {
-                resultSender.lastResult(Boolean.TRUE);
-              }
-            }
 
-            @Override
-            public String getId() {
-              return getClass().getName();
+    int j = 0;
+    for (String value : testKeysSet) {
+      Integer val = j++;
+      region.put(value, val);
+    }
+    ResultCollector<?, ?> rc1 =
+        dataSet.withFilter(testKeysSet).setArguments(Boolean.TRUE).execute(new 
FunctionAdapter() {
+          @Override
+          public void execute(FunctionContext context) {
+            @SuppressWarnings("unchecked")
+            final ResultSender<Object> resultSender = 
context.getResultSender();
+            if (context.getArguments() instanceof String) {
+              resultSender.lastResult("Success");
+            } else if (context.getArguments() instanceof Boolean) {
+              resultSender.lastResult(Boolean.TRUE);
             }
+          }
 
-            @Override
-            public boolean hasResult() {
-              return true;
-            }
-          });
-      List l = ((List) rc1.getResult());
-      logger.info("Result size : " + l.size());
-      assertEquals(3, l.size());
-      for (Object o : l) {
-        assertEquals(Boolean.TRUE, o);
-      }
-    } catch (Exception e) {
-      logger.info("Exception : " + e.getMessage());
-      e.printStackTrace();
-      fail("Test failed after the put operation");
+          @Override
+          public String getId() {
+            return getClass().getName();
+          }
 
+          @Override
+          public boolean hasResult() {
+            return true;
+          }
+        });
+    List<?> l = (List<?>) rc1.getResult();
+    logger.info("Result size : " + l.size());

Review Comment:
   Naming and typing, not your fault, but could you improve it?



##########
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/execute/PRClientServerRegionFunctionExecutionNoSingleHopDistributedTest.java:
##########
@@ -520,132 +584,121 @@ private static void putOperation() {
   }
 
   private void createScenario() {
-    ArrayList commonAttributes =
+    ArrayList<Object> commonAttributes =
         createCommonServerAttributes("TestPartitionedRegion", null, 0, null);
     createClientServerScenarioNoSingleHop(commonAttributes, 20, 20, 20);
   }
 
+  private void createScenarioWithClientConnectTimeout(int connectTimeout, int 
maxThreads) {
+    ArrayList<Object> commonAttributes =
+        createCommonServerAttributes("TestPartitionedRegion", null, 0, null);
+    createClientServerScenarioNoSingleHop(commonAttributes, 20, 20, 20, 
maxThreads, connectTimeout);
+  }
+
+
   private void createScenarioForBucketFilter() {
-    ArrayList commonAttributes = 
createCommonServerAttributes("TestPartitionedRegion",
+    ArrayList<Object> commonAttributes = 
createCommonServerAttributes("TestPartitionedRegion",
         new BucketFilterPRResolver(), 0, null);
     createClientServerScenarioNoSingleHop(commonAttributes, 20, 20, 20);
   }
 
   private static void checkBucketsOnServer() {
     PartitionedRegion region = (PartitionedRegion) 
cache.getRegion(PartitionedRegionName);
-    HashMap localBucket2RegionMap = (HashMap) 
region.getDataStore().getSizeLocally();
+    HashMap<Integer, Integer> localBucket2RegionMap =
+        (HashMap<Integer, Integer>) region.getDataStore().getSizeLocally();
     logger.info(
         "Size of the " + PartitionedRegionName + " in this VM :- " + 
localBucket2RegionMap.size());
-    Set entrySet = localBucket2RegionMap.entrySet();
-    assertNotNull(entrySet);
+    Set<Map.Entry<Integer, Integer>> entrySet = 
localBucket2RegionMap.entrySet();
+    assertThat(entrySet).isNotNull();
   }
 
   private static void serverAllKeyExecution(Boolean isByName) {
     Region<String, Integer> region = cache.getRegion(PartitionedRegionName);
-    assertNotNull(region);
+    assertThat(region).isNotNull();
     final HashSet<String> testKeysSet = new HashSet<>();
     for (int i = (totalNumBuckets / 2); i > 0; i--) {
       testKeysSet.add("execKey-" + i);
     }
     DistributedSystem.setThreadsSocketPolicy(false);
-    Function function = new TestFunction(true, TEST_FUNCTION2);
+    Function<Object> function = new TestFunction<>(true, TEST_FUNCTION2);
     FunctionService.registerFunction(function);
     Execution dataSet = FunctionService.onRegion(region);
-    try {
-      int j = 0;
-      HashSet<Integer> origVals = new HashSet<>();
-      for (String item : testKeysSet) {
-        Integer val = j++;
-        origVals.add(val);
-        region.put(item, val);
-      }
-      ResultCollector rc1 = executeOnAll(dataSet, Boolean.TRUE, function, 
isByName);
-      List resultList = (List) rc1.getResult();
-      logger.info("Result size : " + resultList.size());
-      logger.info("Result are SSSS : " + resultList);
-      assertEquals(3, resultList.size());
-
-      for (Object result : resultList) {
-        assertEquals(Boolean.TRUE, result);
-      }
-      ResultCollector rc2 = executeOnAll(dataSet, testKeysSet, function, 
isByName);
-      List l2 = ((List) rc2.getResult());
-      assertEquals(3, l2.size());
-      HashSet<Integer> foundVals = new HashSet<>();
-      for (Object value : l2) {
-        ArrayList subL = (ArrayList) (value);
-        assertTrue(subL.size() > 0);
-        for (Object o : subL) {
-          assertTrue(foundVals.add((Integer) o));
-        }
-      }
-      assertEquals(origVals, foundVals);
 
-    } catch (Exception e) {
-      Assert.fail("Test failed after the put operation", e);
+    int j = 0;
+    HashSet<Integer> origVals = new HashSet<>();
+    for (String item : testKeysSet) {
+      Integer val = j++;
+      origVals.add(val);
+      region.put(item, val);
+    }
+    ResultCollector<?, ?> rc1 = executeOnAll(dataSet, Boolean.TRUE, function, 
isByName);
+    List<?> resultList = (List<?>) rc1.getResult();
+    assertThat(resultList).hasSize(3);
 
+    for (Object result : resultList) {
+      assertThat(result).isEqualTo(Boolean.TRUE);
     }
+    ResultCollector<?, ?> rc2 = executeOnAll(dataSet, testKeysSet, function, 
isByName);
+    List<?> l2 = (List<?>) rc2.getResult();
+    assertThat(l2).hasSize(3);
+    HashSet<Integer> foundVals = new HashSet<>();
+    for (Object value : l2) {
+      List<?> subL = (List<?>) value;
+      assertThat(subL).hasSizeGreaterThan(0);
+      for (Object o : subL) {
+        assertThat(foundVals.add((Integer) o)).isTrue();
+      }
+    }
+    assertThat(foundVals).containsExactlyInAnyOrderElementsOf(origVals);
   }
 
   public static void getAll() {
     Region<String, Integer> region = cache.getRegion(PartitionedRegionName);
-    assertNotNull(region);
+    assertThat(region).isNotNull();
     final List<String> testKeysList = new ArrayList<>();
     for (int i = (totalNumBuckets * 3); i > 0; i--) {
       testKeysList.add("execKey-" + i);
     }
     DistributedSystem.setThreadsSocketPolicy(false);
-    try {
-      int j = 0;
-      Map<String, Integer> origVals = new HashMap<>();
-      for (String key : testKeysList) {
-        Integer val = j++;
-        origVals.put(key, val);
-        region.put(key, val);
-      }
-      Map resultMap = region.getAll(testKeysList);
-      assertEquals(resultMap, origVals);
-      Wait.pause(2000);
-      Map secondResultMap = region.getAll(testKeysList);
-      assertEquals(secondResultMap, origVals);
-
-    } catch (Exception e) {
-      Assert.fail("Test failed after the put operation", e);
-
+    int j = 0;
+    Map<String, Integer> origVals = new HashMap<>();
+    for (String key : testKeysList) {
+      Integer val = j++;
+      origVals.put(key, val);
+      region.put(key, val);
     }
+    Map<String, Integer> resultMap = region.getAll(testKeysList);
+    assertThat(resultMap).containsExactlyInAnyOrderEntriesOf(origVals);
+    Wait.pause(2000);
+    Map<String, Integer> secondResultMap = region.getAll(testKeysList);
+    assertThat(secondResultMap).containsExactlyInAnyOrderEntriesOf(origVals);
   }
 
   public static void putAll() {
     Region<String, Integer> region = cache.getRegion(PartitionedRegionName);
-    assertNotNull(region);
+    assertThat(region).isNotNull();
     final List<String> testKeysList = new ArrayList<>();
     for (int i = (totalNumBuckets * 3); i > 0; i--) {
       testKeysList.add("execKey-" + i);
     }
     DistributedSystem.setThreadsSocketPolicy(false);
-    try {
-      int j = 0;
-      Map<String, Integer> origVals = new HashMap<>();
-      for (String key : testKeysList) {
-        Integer val = j++;
-        origVals.put(key, val);
-        region.put(key, val);
-      }
-      Map resultMap = region.getAll(testKeysList);
-      assertEquals(resultMap, origVals);
-      Wait.pause(2000);
-      Map secondResultMap = region.getAll(testKeysList);
-      assertEquals(secondResultMap, origVals);
-
-    } catch (Exception e) {
-      Assert.fail("Test failed after the put operation", e);
-
+    int j = 0;
+    Map<String, Integer> origVals = new HashMap<>();
+    for (String key : testKeysList) {
+      Integer val = j++;
+      origVals.put(key, val);
+      region.put(key, val);
     }
+    Map<String, Integer> resultMap = region.getAll(testKeysList);
+    assertThat(resultMap).containsExactlyInAnyOrderEntriesOf(origVals);

Review Comment:
   same



##########
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/execute/PRClientServerRegionFunctionExecutionNoSingleHopDistributedTest.java:
##########
@@ -657,191 +710,162 @@ private static void 
serverMultiKeyExecutionOnASingleBucket(Boolean isByName) {
     }
     DistributedSystem.setThreadsSocketPolicy(false);
     for (String o : testKeysSet) {
-      try {
-        Set<String> singleKeySet = Collections.singleton(o);
-        Function function = new TestFunction(true, TEST_FUNCTION2);
-        FunctionService.registerFunction(function);
-        Execution dataSet = FunctionService.onRegion(region);
-        ResultCollector rc1 = execute(dataSet, singleKeySet, Boolean.TRUE, 
function, isByName);
-        List l = ((List) rc1.getResult());
-        assertEquals(1, l.size());
-
-        ResultCollector rc2 =
-            execute(dataSet, singleKeySet, new HashSet<>(singleKeySet), 
function, isByName);
-        List l2 = ((List) rc2.getResult());
-
-        assertEquals(1, l2.size());
-        List subList = (List) l2.iterator().next();
-        assertEquals(1, subList.size());
-        assertEquals(region.get(singleKeySet.iterator().next()), 
subList.iterator().next());
-      } catch (Exception expected) {
-        logger.info("Exception : " + expected.getMessage());
-        expected.printStackTrace();
-        fail("Test failed after the put operation");
-      }
+      Set<String> singleKeySet = Collections.singleton(o);
+      Function<Object> function = new TestFunction<>(true, TEST_FUNCTION2);
+      FunctionService.registerFunction(function);
+      Execution dataSet = FunctionService.onRegion(region);
+      ResultCollector<?, ?> rc1 = execute(dataSet, singleKeySet, Boolean.TRUE, 
function, isByName);
+      List<?> l = (List<?>) rc1.getResult();
+      assertThat(l).hasSize(1);
+
+      ResultCollector<?, ?> rc2 =
+          execute(dataSet, singleKeySet, new HashSet<>(singleKeySet), 
function, isByName);
+      List<?> l2 = (List<?>) rc2.getResult();
+
+      assertThat(l2).hasSize(1);
+      List<Integer> subList = (List<Integer>) l2.iterator().next();
+      assertThat(subList).hasSize(1);
+      
assertThat(subList).containsOnly(region.get(singleKeySet.iterator().next()));
     }
   }
 
   private static void serverMultiKeyExecution(Boolean isByName) {
     Region<String, Integer> region = cache.getRegion(PartitionedRegionName);
-    assertNotNull(region);
+    assertThat(region).isNotNull();
     final HashSet<String> testKeysSet = new HashSet<>();
     for (int i = (totalNumBuckets * 2); i > 0; i--) {
       testKeysSet.add("execKey-" + i);
     }
     DistributedSystem.setThreadsSocketPolicy(false);
-    Function function = new TestFunction(true, TEST_FUNCTION2);
+    Function<Object> function = new TestFunction<>(true, TEST_FUNCTION2);
     FunctionService.registerFunction(function);
     Execution dataSet = FunctionService.onRegion(region);
-    try {
-      int j = 0;
-      HashSet<Integer> origVals = new HashSet<>();
-      for (String element : testKeysSet) {
-        Integer val = j++;
-        origVals.add(val);
-        region.put(element, val);
-      }
-      ResultCollector rc1 = execute(dataSet, testKeysSet, Boolean.TRUE, 
function, isByName);
-      List l = ((List) rc1.getResult());
-      logger.info("Result size : " + l.size());
-      assertEquals(3, l.size());
-      for (Object item : l) {
-        assertEquals(Boolean.TRUE, item);
-      }
 
-      ResultCollector rc2 = execute(dataSet, testKeysSet, testKeysSet, 
function, isByName);
-      List l2 = ((List) rc2.getResult());
-      assertEquals(3, l2.size());
-      HashSet<Integer> foundVals = new HashSet<>();
-      for (Object value : l2) {
-        ArrayList subL = (ArrayList) value;
-        assertTrue(subL.size() > 0);
-        for (Object o : subL) {
-          assertTrue(foundVals.add((Integer) o));
-        }
-      }
-      assertEquals(origVals, foundVals);
-
-    } catch (Exception e) {
-      Assert.fail("Test failed after the put operation", e);
+    int j = 0;
+    HashSet<Integer> origVals = new HashSet<>();
+    for (String element : testKeysSet) {
+      Integer val = j++;
+      origVals.add(val);
+      region.put(element, val);
+    }
+    ResultCollector<?, ?> rc1 = execute(dataSet, testKeysSet, Boolean.TRUE, 
function, isByName);
+    List<?> l = (List<?>) rc1.getResult();
+    assertThat(l).hasSize(3);
+    for (Object item : l) {
+      assertThat(item).isEqualTo(Boolean.TRUE);
+    }
 
+    ResultCollector<?, ?> rc2 = execute(dataSet, testKeysSet, testKeysSet, 
function, isByName);
+    List<?> l2 = (List<?>) rc2.getResult();
+    assertThat(l2).hasSize(3);
+    HashSet<Integer> foundVals = new HashSet<>();
+    for (Object value : l2) {
+      List<?> subL = (List<?>) value;
+      assertThat(subL).hasSizeGreaterThan(0);
+      for (Object o : subL) {
+        assertThat(foundVals.add((Integer) o)).isTrue();

Review Comment:
   Can you fix the typing of the generics to avoid casting? subL is as 
List<Integer>



##########
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/execute/PRClientServerRegionFunctionExecutionNoSingleHopDistributedTest.java:
##########
@@ -657,191 +710,162 @@ private static void 
serverMultiKeyExecutionOnASingleBucket(Boolean isByName) {
     }
     DistributedSystem.setThreadsSocketPolicy(false);
     for (String o : testKeysSet) {
-      try {
-        Set<String> singleKeySet = Collections.singleton(o);
-        Function function = new TestFunction(true, TEST_FUNCTION2);
-        FunctionService.registerFunction(function);
-        Execution dataSet = FunctionService.onRegion(region);
-        ResultCollector rc1 = execute(dataSet, singleKeySet, Boolean.TRUE, 
function, isByName);
-        List l = ((List) rc1.getResult());
-        assertEquals(1, l.size());
-
-        ResultCollector rc2 =
-            execute(dataSet, singleKeySet, new HashSet<>(singleKeySet), 
function, isByName);
-        List l2 = ((List) rc2.getResult());
-
-        assertEquals(1, l2.size());
-        List subList = (List) l2.iterator().next();
-        assertEquals(1, subList.size());
-        assertEquals(region.get(singleKeySet.iterator().next()), 
subList.iterator().next());
-      } catch (Exception expected) {
-        logger.info("Exception : " + expected.getMessage());
-        expected.printStackTrace();
-        fail("Test failed after the put operation");
-      }
+      Set<String> singleKeySet = Collections.singleton(o);
+      Function<Object> function = new TestFunction<>(true, TEST_FUNCTION2);
+      FunctionService.registerFunction(function);
+      Execution dataSet = FunctionService.onRegion(region);
+      ResultCollector<?, ?> rc1 = execute(dataSet, singleKeySet, Boolean.TRUE, 
function, isByName);
+      List<?> l = (List<?>) rc1.getResult();

Review Comment:
   not your fault, but single letter variable names are not great.



##########
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/execute/PRClientServerRegionFunctionExecutionNoSingleHopDistributedTest.java:
##########
@@ -657,191 +710,162 @@ private static void 
serverMultiKeyExecutionOnASingleBucket(Boolean isByName) {
     }
     DistributedSystem.setThreadsSocketPolicy(false);
     for (String o : testKeysSet) {
-      try {
-        Set<String> singleKeySet = Collections.singleton(o);
-        Function function = new TestFunction(true, TEST_FUNCTION2);
-        FunctionService.registerFunction(function);
-        Execution dataSet = FunctionService.onRegion(region);
-        ResultCollector rc1 = execute(dataSet, singleKeySet, Boolean.TRUE, 
function, isByName);
-        List l = ((List) rc1.getResult());
-        assertEquals(1, l.size());
-
-        ResultCollector rc2 =
-            execute(dataSet, singleKeySet, new HashSet<>(singleKeySet), 
function, isByName);
-        List l2 = ((List) rc2.getResult());
-
-        assertEquals(1, l2.size());
-        List subList = (List) l2.iterator().next();
-        assertEquals(1, subList.size());
-        assertEquals(region.get(singleKeySet.iterator().next()), 
subList.iterator().next());
-      } catch (Exception expected) {
-        logger.info("Exception : " + expected.getMessage());
-        expected.printStackTrace();
-        fail("Test failed after the put operation");
-      }
+      Set<String> singleKeySet = Collections.singleton(o);
+      Function<Object> function = new TestFunction<>(true, TEST_FUNCTION2);
+      FunctionService.registerFunction(function);
+      Execution dataSet = FunctionService.onRegion(region);
+      ResultCollector<?, ?> rc1 = execute(dataSet, singleKeySet, Boolean.TRUE, 
function, isByName);
+      List<?> l = (List<?>) rc1.getResult();
+      assertThat(l).hasSize(1);
+
+      ResultCollector<?, ?> rc2 =
+          execute(dataSet, singleKeySet, new HashSet<>(singleKeySet), 
function, isByName);
+      List<?> l2 = (List<?>) rc2.getResult();
+
+      assertThat(l2).hasSize(1);
+      List<Integer> subList = (List<Integer>) l2.iterator().next();
+      assertThat(subList).hasSize(1);
+      
assertThat(subList).containsOnly(region.get(singleKeySet.iterator().next()));
     }
   }
 
   private static void serverMultiKeyExecution(Boolean isByName) {
     Region<String, Integer> region = cache.getRegion(PartitionedRegionName);
-    assertNotNull(region);
+    assertThat(region).isNotNull();
     final HashSet<String> testKeysSet = new HashSet<>();
     for (int i = (totalNumBuckets * 2); i > 0; i--) {
       testKeysSet.add("execKey-" + i);
     }
     DistributedSystem.setThreadsSocketPolicy(false);
-    Function function = new TestFunction(true, TEST_FUNCTION2);
+    Function<Object> function = new TestFunction<>(true, TEST_FUNCTION2);
     FunctionService.registerFunction(function);
     Execution dataSet = FunctionService.onRegion(region);
-    try {
-      int j = 0;
-      HashSet<Integer> origVals = new HashSet<>();
-      for (String element : testKeysSet) {
-        Integer val = j++;
-        origVals.add(val);
-        region.put(element, val);
-      }
-      ResultCollector rc1 = execute(dataSet, testKeysSet, Boolean.TRUE, 
function, isByName);
-      List l = ((List) rc1.getResult());
-      logger.info("Result size : " + l.size());
-      assertEquals(3, l.size());
-      for (Object item : l) {
-        assertEquals(Boolean.TRUE, item);
-      }
 
-      ResultCollector rc2 = execute(dataSet, testKeysSet, testKeysSet, 
function, isByName);
-      List l2 = ((List) rc2.getResult());
-      assertEquals(3, l2.size());
-      HashSet<Integer> foundVals = new HashSet<>();
-      for (Object value : l2) {
-        ArrayList subL = (ArrayList) value;
-        assertTrue(subL.size() > 0);
-        for (Object o : subL) {
-          assertTrue(foundVals.add((Integer) o));
-        }
-      }
-      assertEquals(origVals, foundVals);
-
-    } catch (Exception e) {
-      Assert.fail("Test failed after the put operation", e);
+    int j = 0;
+    HashSet<Integer> origVals = new HashSet<>();
+    for (String element : testKeysSet) {
+      Integer val = j++;
+      origVals.add(val);
+      region.put(element, val);
+    }
+    ResultCollector<?, ?> rc1 = execute(dataSet, testKeysSet, Boolean.TRUE, 
function, isByName);
+    List<?> l = (List<?>) rc1.getResult();
+    assertThat(l).hasSize(3);
+    for (Object item : l) {
+      assertThat(item).isEqualTo(Boolean.TRUE);
+    }
 
+    ResultCollector<?, ?> rc2 = execute(dataSet, testKeysSet, testKeysSet, 
function, isByName);
+    List<?> l2 = (List<?>) rc2.getResult();
+    assertThat(l2).hasSize(3);
+    HashSet<Integer> foundVals = new HashSet<>();
+    for (Object value : l2) {
+      List<?> subL = (List<?>) value;
+      assertThat(subL).hasSizeGreaterThan(0);
+      for (Object o : subL) {
+        assertThat(foundVals.add((Integer) o)).isTrue();
+      }
     }
+    assertThat(foundVals).containsExactlyInAnyOrderElementsOf(origVals);
   }
 
 
   private static void serverMultiKeyExecutionSocketTimeOut(Boolean isByName) {
     Region<String, Integer> region = cache.getRegion(PartitionedRegionName);
-    assertNotNull(region);
+    assertThat(region).isNotNull();
     final HashSet<String> testKeysSet = new HashSet<>();
     for (int i = (totalNumBuckets * 2); i > 0; i--) {
       testKeysSet.add("execKey-" + i);
     }
     DistributedSystem.setThreadsSocketPolicy(false);
-    Function function = new TestFunction(true, 
TestFunction.TEST_FUNCTION_SOCKET_TIMEOUT);
+    Function<Object> function = new TestFunction<>(true, 
TestFunction.TEST_FUNCTION_SOCKET_TIMEOUT);
     FunctionService.registerFunction(function);
     Execution dataSet = FunctionService.onRegion(region);
-    try {
-      int j = 0;
-      for (String value : testKeysSet) {
-        Integer val = j++;
-        region.put(value, val);
-      }
-      ResultCollector rc1 = execute(dataSet, testKeysSet, Boolean.TRUE, 
function, isByName);
-      List l = ((List) rc1.getResult());
-      logger.info("Result size : " + l.size());
-      assertEquals(3, l.size());
-      for (Object o : l) {
-        assertEquals(Boolean.TRUE, o);
-      }
-
-    } catch (Exception e) {
-      Assert.fail("Test failed after the function execution", e);
 
+    int j = 0;
+    for (String value : testKeysSet) {
+      Integer val = j++;
+      region.put(value, val);
+    }
+    ResultCollector<?, ?> rc1 = execute(dataSet, testKeysSet, Boolean.TRUE, 
function, isByName);
+    List<?> l = (List<?>) rc1.getResult();
+    logger.info("Result size : " + l.size());
+    assertThat(l).hasSize(3);
+    for (Object o : l) {
+      assertThat(o).isEqualTo(Boolean.TRUE);
     }
   }
 
   private static void serverSingleKeyExecutionSocketTimeOut(Boolean isByName) {
     Region<String, Integer> region = cache.getRegion(PartitionedRegionName);
-    assertNotNull(region);
+    assertThat(region).isNotNull();
     final String testKey = "execKey";
     final Set<String> testKeysSet = new HashSet<>();
     testKeysSet.add(testKey);
     DistributedSystem.setThreadsSocketPolicy(false);
 
-    Function function = new TestFunction(true, 
TestFunction.TEST_FUNCTION_SOCKET_TIMEOUT);
+    Function<Object> function = new TestFunction<>(true, 
TestFunction.TEST_FUNCTION_SOCKET_TIMEOUT);
     FunctionService.registerFunction(function);
     Execution dataSet = FunctionService.onRegion(region);
 
     region.put(testKey, 1);
-    try {
-      ResultCollector rs = execute(dataSet, testKeysSet, Boolean.TRUE, 
function, isByName);
-      assertEquals(Boolean.TRUE, ((List) rs.getResult()).get(0));
 
-      ResultCollector rs2 = execute(dataSet, testKeysSet, testKey, function, 
isByName);
-      assertEquals(testKey, ((List) rs2.getResult()).get(0));
+    ResultCollector<?, ?> rs = execute(dataSet, testKeysSet, Boolean.TRUE, 
function, isByName);
+    assertThat(((List<?>) rs.getResult()).get(0)).isEqualTo(Boolean.TRUE);
 
-    } catch (Exception ex) {
-      ex.printStackTrace();
-      logger.info("Exception : ", ex);
-      Assert.fail("Test failed after the put operation", ex);
-    }
+    ResultCollector<?, ?> rs2 = execute(dataSet, testKeysSet, testKey, 
function, isByName);
+    assertThat(((List<?>) rs2.getResult()).get(0)).isEqualTo(testKey);
   }
 
   private static void serverMultiKeyExecution_Inline() {
     Region<String, Integer> region = cache.getRegion(PartitionedRegionName);
-    assertNotNull(region);
+    assertThat(region).isNotNull();
     final HashSet<String> testKeysSet = new HashSet<>();
     for (int i = (totalNumBuckets * 2); i > 0; i--) {
       testKeysSet.add("execKey-" + i);
     }
     DistributedSystem.setThreadsSocketPolicy(false);
     Execution dataSet = FunctionService.onRegion(region);
-    try {
-      int j = 0;
-      for (String value : testKeysSet) {
-        Integer val = j++;
-        region.put(value, val);
-      }
-      ResultCollector rc1 =
-          
dataSet.withFilter(testKeysSet).setArguments(Boolean.TRUE).execute(new 
FunctionAdapter() {
-            @Override
-            public void execute(FunctionContext context) {
-              @SuppressWarnings("unchecked")
-              final ResultSender<Object> resultSender = 
context.getResultSender();
-              if (context.getArguments() instanceof String) {
-                resultSender.lastResult("Success");
-              } else if (context.getArguments() instanceof Boolean) {
-                resultSender.lastResult(Boolean.TRUE);
-              }
-            }
 
-            @Override
-            public String getId() {
-              return getClass().getName();
+    int j = 0;
+    for (String value : testKeysSet) {
+      Integer val = j++;
+      region.put(value, val);
+    }
+    ResultCollector<?, ?> rc1 =
+        dataSet.withFilter(testKeysSet).setArguments(Boolean.TRUE).execute(new 
FunctionAdapter() {
+          @Override
+          public void execute(FunctionContext context) {
+            @SuppressWarnings("unchecked")

Review Comment:
   is this still necessary?



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