ringles commented on a change in pull request #7261:
URL: https://github.com/apache/geode/pull/7261#discussion_r799671091



##########
File path: 
geode-for-redis/src/distributedTest/java/org/apache/geode/redis/internal/commands/executor/list/LPopAndCrashesDUnitTest.java
##########
@@ -0,0 +1,108 @@
+/*
+ * 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.geode.redis.internal.commands.executor.list;
+
+import static 
org.apache.geode.test.dunit.rules.RedisClusterStartupRule.BIND_ADDRESS;
+import static 
org.apache.geode.test.dunit.rules.RedisClusterStartupRule.REDIS_CLIENT_TIMEOUT;
+import static org.assertj.core.api.Assertions.assertThat;
+
+import org.junit.AfterClass;
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.ClassRule;
+import org.junit.Rule;
+import org.junit.Test;
+import redis.clients.jedis.HostAndPort;
+import redis.clients.jedis.JedisCluster;
+
+import org.apache.geode.test.dunit.rules.MemberVM;
+import org.apache.geode.test.dunit.rules.RedisClusterStartupRule;
+import org.apache.geode.test.junit.rules.ExecutorServiceRule;
+
+public class LPopAndCrashesDUnitTest {
+  public static final int NUM_VMS = 4;
+  public static final int MINIMUM_ITERATIONS = 10000;
+
+  @ClassRule
+  public static RedisClusterStartupRule clusterStartUp = new 
RedisClusterStartupRule(NUM_VMS);
+
+  @Rule
+  public ExecutorServiceRule executor = new ExecutorServiceRule();
+
+  private static JedisCluster jedis;
+
+  @BeforeClass
+  public static void classSetup() {
+    MemberVM locator = clusterStartUp.startLocatorVM(0);
+    clusterStartUp.startRedisVM(1, locator.getPort());
+    clusterStartUp.startRedisVM(2, locator.getPort());
+    clusterStartUp.startRedisVM(3, locator.getPort());
+
+    int redisServerPort = clusterStartUp.getRedisPort(1);
+    jedis = new JedisCluster(new HostAndPort(BIND_ADDRESS, redisServerPort), 
REDIS_CLIENT_TIMEOUT);
+  }
+
+  @Before
+  public void testSetup() {
+    clusterStartUp.flushAll();
+  }
+
+  @AfterClass
+  public static void tearDown() {
+    jedis.close();
+  }
+
+
+  @Test
+  public void shouldDistributeDataAmongCluster_andRetainDataAfterServerCrash() 
{

Review comment:
       Done.

##########
File path: 
geode-for-redis/src/distributedTest/java/org/apache/geode/redis/internal/commands/executor/list/LPopDUnitTest.java
##########
@@ -0,0 +1,166 @@
+/*
+ * 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.geode.redis.internal.commands.executor.list;
+
+import static 
org.apache.geode.test.dunit.rules.RedisClusterStartupRule.BIND_ADDRESS;
+import static 
org.apache.geode.test.dunit.rules.RedisClusterStartupRule.REDIS_CLIENT_TIMEOUT;
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.time.Duration;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.Future;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+import org.junit.AfterClass;
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.ClassRule;
+import org.junit.Rule;
+import org.junit.Test;
+import redis.clients.jedis.HostAndPort;
+import redis.clients.jedis.JedisCluster;
+
+import org.apache.geode.test.awaitility.GeodeAwaitility;
+import org.apache.geode.test.dunit.rules.MemberVM;
+import org.apache.geode.test.dunit.rules.RedisClusterStartupRule;
+import org.apache.geode.test.junit.rules.ExecutorServiceRule;
+
+public class LPopDUnitTest {
+  public static final int NUM_VMS = 4;
+  public static final int MINIMUM_ITERATIONS = 10000;
+
+  @ClassRule
+  public static RedisClusterStartupRule clusterStartUp = new 
RedisClusterStartupRule(NUM_VMS);
+
+  @Rule
+  public ExecutorServiceRule executor = new ExecutorServiceRule();
+
+  private static JedisCluster jedis;
+
+  @BeforeClass
+  public static void classSetup() {
+    MemberVM locator = clusterStartUp.startLocatorVM(0);
+    clusterStartUp.startRedisVM(1, locator.getPort());
+    clusterStartUp.startRedisVM(2, locator.getPort());
+    clusterStartUp.startRedisVM(3, locator.getPort());
+
+    int redisServerPort = clusterStartUp.getRedisPort(1);
+    jedis = new JedisCluster(new HostAndPort(BIND_ADDRESS, redisServerPort), 
REDIS_CLIENT_TIMEOUT);
+  }
+
+  @Before
+  public void testSetup() {
+    clusterStartUp.flushAll();
+  }
+
+  @AfterClass
+  public static void tearDown() {
+    jedis.close();
+  }
+
+  @Test
+  public void givenBucketsMoveDuringLpop_thenOperationsAreNotLost() throws 
Exception {
+    AtomicBoolean running = new AtomicBoolean(true);
+
+    List<String> listHashtags = new ArrayList<>();
+    listHashtags.add(clusterStartUp.getKeyOnServer("lpop", 1));
+    listHashtags.add(clusterStartUp.getKeyOnServer("lpop", 2));
+    listHashtags.add(clusterStartUp.getKeyOnServer("lpop", 3));
+
+    lpushPerformAndVerify(1, MINIMUM_ITERATIONS, listHashtags.get(0));
+    lpushPerformAndVerify(2, MINIMUM_ITERATIONS, listHashtags.get(1));
+    lpushPerformAndVerify(3, MINIMUM_ITERATIONS, listHashtags.get(2));
+
+    Runnable task1 =
+        () -> lpopPerformAndVerify(1, MINIMUM_ITERATIONS, listHashtags.get(0), 
running);
+    Runnable task2 =
+        () -> lpopPerformAndVerify(2, MINIMUM_ITERATIONS, listHashtags.get(1), 
running);
+    Runnable task3 =
+        () -> lpopPerformAndVerify(3, MINIMUM_ITERATIONS, listHashtags.get(2), 
running);
+
+    Future<Void> future1 = executor.runAsync(task1);
+    Future<Void> future2 = executor.runAsync(task2);
+    Future<Void> future3 = executor.runAsync(task3);
+
+    for (int i = 0; i < 100 && running.get(); i++) {
+      clusterStartUp.moveBucketForKey(listHashtags.get(i % 
listHashtags.size()));
+      GeodeAwaitility.await().during(Duration.ofMillis(200)).until(() -> true);
+    }
+
+    for (int i = 0; i < 100 && running.get(); i++) {
+      clusterStartUp.moveBucketForKey(listHashtags.get(i % 
listHashtags.size()));
+      GeodeAwaitility.await().during(Duration.ofMillis(200)).until(() -> true);
+    }
+
+    running.set(false);
+
+    future1.get();
+    future2.get();
+    future3.get();
+  }
+
+  private void lpushPerformAndVerify(int index, int minimumIterations, String 
hashtag) {

Review comment:
       Done.

##########
File path: 
geode-for-redis/src/distributedTest/java/org/apache/geode/redis/internal/commands/executor/list/LPopDUnitTest.java
##########
@@ -0,0 +1,166 @@
+/*
+ * 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.geode.redis.internal.commands.executor.list;
+
+import static 
org.apache.geode.test.dunit.rules.RedisClusterStartupRule.BIND_ADDRESS;
+import static 
org.apache.geode.test.dunit.rules.RedisClusterStartupRule.REDIS_CLIENT_TIMEOUT;
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.time.Duration;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.Future;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+import org.junit.AfterClass;
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.ClassRule;
+import org.junit.Rule;
+import org.junit.Test;
+import redis.clients.jedis.HostAndPort;
+import redis.clients.jedis.JedisCluster;
+
+import org.apache.geode.test.awaitility.GeodeAwaitility;
+import org.apache.geode.test.dunit.rules.MemberVM;
+import org.apache.geode.test.dunit.rules.RedisClusterStartupRule;
+import org.apache.geode.test.junit.rules.ExecutorServiceRule;
+
+public class LPopDUnitTest {
+  public static final int NUM_VMS = 4;
+  public static final int MINIMUM_ITERATIONS = 10000;
+
+  @ClassRule
+  public static RedisClusterStartupRule clusterStartUp = new 
RedisClusterStartupRule(NUM_VMS);
+
+  @Rule
+  public ExecutorServiceRule executor = new ExecutorServiceRule();
+
+  private static JedisCluster jedis;
+
+  @BeforeClass
+  public static void classSetup() {
+    MemberVM locator = clusterStartUp.startLocatorVM(0);
+    clusterStartUp.startRedisVM(1, locator.getPort());
+    clusterStartUp.startRedisVM(2, locator.getPort());
+    clusterStartUp.startRedisVM(3, locator.getPort());
+
+    int redisServerPort = clusterStartUp.getRedisPort(1);
+    jedis = new JedisCluster(new HostAndPort(BIND_ADDRESS, redisServerPort), 
REDIS_CLIENT_TIMEOUT);
+  }
+
+  @Before
+  public void testSetup() {
+    clusterStartUp.flushAll();
+  }
+
+  @AfterClass
+  public static void tearDown() {
+    jedis.close();
+  }
+
+  @Test
+  public void givenBucketsMoveDuringLpop_thenOperationsAreNotLost() throws 
Exception {
+    AtomicBoolean running = new AtomicBoolean(true);
+
+    List<String> listHashtags = new ArrayList<>();
+    listHashtags.add(clusterStartUp.getKeyOnServer("lpop", 1));
+    listHashtags.add(clusterStartUp.getKeyOnServer("lpop", 2));
+    listHashtags.add(clusterStartUp.getKeyOnServer("lpop", 3));
+
+    lpushPerformAndVerify(1, MINIMUM_ITERATIONS, listHashtags.get(0));
+    lpushPerformAndVerify(2, MINIMUM_ITERATIONS, listHashtags.get(1));
+    lpushPerformAndVerify(3, MINIMUM_ITERATIONS, listHashtags.get(2));
+
+    Runnable task1 =
+        () -> lpopPerformAndVerify(1, MINIMUM_ITERATIONS, listHashtags.get(0), 
running);
+    Runnable task2 =
+        () -> lpopPerformAndVerify(2, MINIMUM_ITERATIONS, listHashtags.get(1), 
running);
+    Runnable task3 =
+        () -> lpopPerformAndVerify(3, MINIMUM_ITERATIONS, listHashtags.get(2), 
running);
+
+    Future<Void> future1 = executor.runAsync(task1);
+    Future<Void> future2 = executor.runAsync(task2);
+    Future<Void> future3 = executor.runAsync(task3);
+
+    for (int i = 0; i < 100 && running.get(); i++) {
+      clusterStartUp.moveBucketForKey(listHashtags.get(i % 
listHashtags.size()));
+      GeodeAwaitility.await().during(Duration.ofMillis(200)).until(() -> true);
+    }
+
+    for (int i = 0; i < 100 && running.get(); i++) {
+      clusterStartUp.moveBucketForKey(listHashtags.get(i % 
listHashtags.size()));
+      GeodeAwaitility.await().during(Duration.ofMillis(200)).until(() -> true);
+    }

Review comment:
       Yanked.

##########
File path: 
geode-for-redis/src/distributedTest/java/org/apache/geode/redis/internal/commands/executor/list/LPopDUnitTest.java
##########
@@ -0,0 +1,166 @@
+/*
+ * 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.geode.redis.internal.commands.executor.list;
+
+import static 
org.apache.geode.test.dunit.rules.RedisClusterStartupRule.BIND_ADDRESS;
+import static 
org.apache.geode.test.dunit.rules.RedisClusterStartupRule.REDIS_CLIENT_TIMEOUT;
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.time.Duration;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.Future;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+import org.junit.AfterClass;
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.ClassRule;
+import org.junit.Rule;
+import org.junit.Test;
+import redis.clients.jedis.HostAndPort;
+import redis.clients.jedis.JedisCluster;
+
+import org.apache.geode.test.awaitility.GeodeAwaitility;
+import org.apache.geode.test.dunit.rules.MemberVM;
+import org.apache.geode.test.dunit.rules.RedisClusterStartupRule;
+import org.apache.geode.test.junit.rules.ExecutorServiceRule;
+
+public class LPopDUnitTest {
+  public static final int NUM_VMS = 4;
+  public static final int MINIMUM_ITERATIONS = 10000;
+
+  @ClassRule
+  public static RedisClusterStartupRule clusterStartUp = new 
RedisClusterStartupRule(NUM_VMS);
+
+  @Rule
+  public ExecutorServiceRule executor = new ExecutorServiceRule();
+
+  private static JedisCluster jedis;
+
+  @BeforeClass
+  public static void classSetup() {
+    MemberVM locator = clusterStartUp.startLocatorVM(0);
+    clusterStartUp.startRedisVM(1, locator.getPort());
+    clusterStartUp.startRedisVM(2, locator.getPort());
+    clusterStartUp.startRedisVM(3, locator.getPort());
+
+    int redisServerPort = clusterStartUp.getRedisPort(1);
+    jedis = new JedisCluster(new HostAndPort(BIND_ADDRESS, redisServerPort), 
REDIS_CLIENT_TIMEOUT);
+  }
+
+  @Before
+  public void testSetup() {
+    clusterStartUp.flushAll();
+  }
+
+  @AfterClass
+  public static void tearDown() {
+    jedis.close();
+  }
+
+  @Test
+  public void givenBucketsMoveDuringLpop_thenOperationsAreNotLost() throws 
Exception {
+    AtomicBoolean running = new AtomicBoolean(true);
+
+    List<String> listHashtags = new ArrayList<>();
+    listHashtags.add(clusterStartUp.getKeyOnServer("lpop", 1));
+    listHashtags.add(clusterStartUp.getKeyOnServer("lpop", 2));
+    listHashtags.add(clusterStartUp.getKeyOnServer("lpop", 3));
+
+    lpushPerformAndVerify(1, MINIMUM_ITERATIONS, listHashtags.get(0));
+    lpushPerformAndVerify(2, MINIMUM_ITERATIONS, listHashtags.get(1));
+    lpushPerformAndVerify(3, MINIMUM_ITERATIONS, listHashtags.get(2));
+
+    Runnable task1 =
+        () -> lpopPerformAndVerify(1, MINIMUM_ITERATIONS, listHashtags.get(0), 
running);
+    Runnable task2 =
+        () -> lpopPerformAndVerify(2, MINIMUM_ITERATIONS, listHashtags.get(1), 
running);
+    Runnable task3 =
+        () -> lpopPerformAndVerify(3, MINIMUM_ITERATIONS, listHashtags.get(2), 
running);
+
+    Future<Void> future1 = executor.runAsync(task1);
+    Future<Void> future2 = executor.runAsync(task2);
+    Future<Void> future3 = executor.runAsync(task3);
+
+    for (int i = 0; i < 100 && running.get(); i++) {
+      clusterStartUp.moveBucketForKey(listHashtags.get(i % 
listHashtags.size()));
+      GeodeAwaitility.await().during(Duration.ofMillis(200)).until(() -> true);
+    }
+
+    for (int i = 0; i < 100 && running.get(); i++) {
+      clusterStartUp.moveBucketForKey(listHashtags.get(i % 
listHashtags.size()));
+      GeodeAwaitility.await().during(Duration.ofMillis(200)).until(() -> true);
+    }
+
+    running.set(false);
+
+    future1.get();
+    future2.get();
+    future3.get();
+  }
+
+  private void lpushPerformAndVerify(int index, int minimumIterations, String 
hashtag) {
+    String key = makeListKeyWithHashtag(index, hashtag);
+    int iterationCount = 0;
+
+    while (iterationCount < minimumIterations) {
+      String elementString = makeElementString(key, iterationCount);
+      try {
+        jedis.lpush(key, elementString);
+      } catch (Exception ex) {
+        throw new RuntimeException("Exception performing LPUSH " + 
elementString, ex);
+      }
+      iterationCount += 1;
+    }
+
+    Long listLength = jedis.llen(key);
+    
assertThat(listLength).isEqualTo(minimumIterations).withFailMessage("Initial 
list '"

Review comment:
       Reworked.

##########
File path: 
geode-for-redis/src/distributedTest/java/org/apache/geode/redis/internal/commands/executor/list/LPopDUnitTest.java
##########
@@ -0,0 +1,166 @@
+/*
+ * 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.geode.redis.internal.commands.executor.list;
+
+import static 
org.apache.geode.test.dunit.rules.RedisClusterStartupRule.BIND_ADDRESS;
+import static 
org.apache.geode.test.dunit.rules.RedisClusterStartupRule.REDIS_CLIENT_TIMEOUT;
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.time.Duration;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.Future;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+import org.junit.AfterClass;
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.ClassRule;
+import org.junit.Rule;
+import org.junit.Test;
+import redis.clients.jedis.HostAndPort;
+import redis.clients.jedis.JedisCluster;
+
+import org.apache.geode.test.awaitility.GeodeAwaitility;
+import org.apache.geode.test.dunit.rules.MemberVM;
+import org.apache.geode.test.dunit.rules.RedisClusterStartupRule;
+import org.apache.geode.test.junit.rules.ExecutorServiceRule;
+
+public class LPopDUnitTest {
+  public static final int NUM_VMS = 4;
+  public static final int MINIMUM_ITERATIONS = 10000;
+
+  @ClassRule
+  public static RedisClusterStartupRule clusterStartUp = new 
RedisClusterStartupRule(NUM_VMS);
+
+  @Rule
+  public ExecutorServiceRule executor = new ExecutorServiceRule();
+
+  private static JedisCluster jedis;
+
+  @BeforeClass
+  public static void classSetup() {
+    MemberVM locator = clusterStartUp.startLocatorVM(0);
+    clusterStartUp.startRedisVM(1, locator.getPort());
+    clusterStartUp.startRedisVM(2, locator.getPort());
+    clusterStartUp.startRedisVM(3, locator.getPort());
+
+    int redisServerPort = clusterStartUp.getRedisPort(1);
+    jedis = new JedisCluster(new HostAndPort(BIND_ADDRESS, redisServerPort), 
REDIS_CLIENT_TIMEOUT);
+  }
+
+  @Before
+  public void testSetup() {
+    clusterStartUp.flushAll();
+  }
+
+  @AfterClass
+  public static void tearDown() {
+    jedis.close();
+  }
+
+  @Test
+  public void givenBucketsMoveDuringLpop_thenOperationsAreNotLost() throws 
Exception {
+    AtomicBoolean running = new AtomicBoolean(true);
+
+    List<String> listHashtags = new ArrayList<>();
+    listHashtags.add(clusterStartUp.getKeyOnServer("lpop", 1));
+    listHashtags.add(clusterStartUp.getKeyOnServer("lpop", 2));
+    listHashtags.add(clusterStartUp.getKeyOnServer("lpop", 3));
+
+    lpushPerformAndVerify(1, MINIMUM_ITERATIONS, listHashtags.get(0));
+    lpushPerformAndVerify(2, MINIMUM_ITERATIONS, listHashtags.get(1));
+    lpushPerformAndVerify(3, MINIMUM_ITERATIONS, listHashtags.get(2));
+
+    Runnable task1 =
+        () -> lpopPerformAndVerify(1, MINIMUM_ITERATIONS, listHashtags.get(0), 
running);
+    Runnable task2 =
+        () -> lpopPerformAndVerify(2, MINIMUM_ITERATIONS, listHashtags.get(1), 
running);
+    Runnable task3 =
+        () -> lpopPerformAndVerify(3, MINIMUM_ITERATIONS, listHashtags.get(2), 
running);
+
+    Future<Void> future1 = executor.runAsync(task1);
+    Future<Void> future2 = executor.runAsync(task2);
+    Future<Void> future3 = executor.runAsync(task3);
+
+    for (int i = 0; i < 100 && running.get(); i++) {
+      clusterStartUp.moveBucketForKey(listHashtags.get(i % 
listHashtags.size()));
+      GeodeAwaitility.await().during(Duration.ofMillis(200)).until(() -> true);
+    }
+
+    for (int i = 0; i < 100 && running.get(); i++) {
+      clusterStartUp.moveBucketForKey(listHashtags.get(i % 
listHashtags.size()));
+      GeodeAwaitility.await().during(Duration.ofMillis(200)).until(() -> true);
+    }
+
+    running.set(false);
+
+    future1.get();
+    future2.get();
+    future3.get();
+  }
+
+  private void lpushPerformAndVerify(int index, int minimumIterations, String 
hashtag) {
+    String key = makeListKeyWithHashtag(index, hashtag);
+    int iterationCount = 0;
+
+    while (iterationCount < minimumIterations) {
+      String elementString = makeElementString(key, iterationCount);
+      try {
+        jedis.lpush(key, elementString);
+      } catch (Exception ex) {
+        throw new RuntimeException("Exception performing LPUSH " + 
elementString, ex);
+      }
+      iterationCount += 1;
+    }
+
+    Long listLength = jedis.llen(key);
+    
assertThat(listLength).isEqualTo(minimumIterations).withFailMessage("Initial 
list '"
+        + key + "' length " + listLength + " less than target " + 
minimumIterations);
+  }
+
+  private void lpopPerformAndVerify(int index, int minimumIterations, String 
hashtag,
+      AtomicBoolean isRunning) {
+    String key = makeListKeyWithHashtag(index, hashtag);
+    int iterationCount = 0;
+
+    List<String> elementList = new ArrayList<>();
+    while (iterationCount < minimumIterations && isRunning.get()) {

Review comment:
       Used an AtomicLong to track running threads.




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