Program: 48624
Project: 48624
Buggy source:
/** 
 * Validate nodeGroupCreates member formats and values in the ClusterCreate.
 */
public void validateClusterCreate(List<String> failedMsgList,List<String> warningMsgList){
  boolean namenodeHACheck=false;
  int masterCount=0, jobtrackerCount=0, resourcemanagerCount=0, hbasemasterCount=0, zookeeperCount=0, workerCount=0, numOfJournalNode=0;
  boolean appendWarningStr=false;
  if (warningMsgList != null && warningMsgList.isEmpty()) {
    appendWarningStr=true;
  }
  NodeGroupCreate[] nodeGroupCreates=getNodeGroups();
  AuAssert.check(nodeGroupCreates != null && nodeGroupCreates.length > 0);
  if (hasHDFSUrlConfigured() && !validateHDFSUrl()) {
    failedMsgList.add(new StringBuilder().append("String_Node_Str").append(getExternalHDFS()).toString());
  }
  validateNodeGroupPlacementPolicies(failedMsgList,warningMsgList);
  validateStorageType(failedMsgList);
  validateSwapRatio(nodeGroupCreates,failedMsgList);
  for (  NodeGroupCreate nodeGroupCreate : nodeGroupCreates) {
    checkInstanceNum(nodeGroupCreate,failedMsgList);
    checkCPUAndMemory(nodeGroupCreate,failedMsgList,warningMsgList);
    List<NodeGroupRole> groupRoles=getNodeGroupRoles(nodeGroupCreate);
    if (groupRoles != null) {
      for (      NodeGroupRole role : groupRoles) {
switch (role) {
case MASTER:
          masterCount++;
        int numOfInstance=nodeGroupCreate.getInstanceNum();
      if (numOfInstance >= 0 && numOfInstance != 1) {
        if (numOfInstance != 2) {
          collectInstanceNumInvalidateMsg(nodeGroupCreate,failedMsgList);
        }
 else {
          namenodeHACheck=true;
        }
      }
    break;
case JOB_TRACKER:
  jobtrackerCount++;
if (nodeGroupCreate.getInstanceNum() >= 0 && nodeGroupCreate.getInstanceNum() != 1) {
  failedMsgList.add(Constants.WRONG_NUM_OF_JOBTRACKER);
}
break;
case RESOURCEMANAGER:
resourcemanagerCount++;
if (nodeGroupCreate.getInstanceNum() >= 0 && nodeGroupCreate.getInstanceNum() != 1) {
failedMsgList.add(Constants.WRONG_NUM_OF_RESOURCEMANAGER);
}
break;
case HBASE_MASTER:
hbasemasterCount++;
if (nodeGroupCreate.getInstanceNum() == 0) {
collectInstanceNumInvalidateMsg(nodeGroupCreate,failedMsgList);
}
break;
case ZOOKEEPER:
zookeeperCount++;
if (nodeGroupCreate.getInstanceNum() > 0 && nodeGroupCreate.getInstanceNum() < 3) {
failedMsgList.add(Constants.WRONG_NUM_OF_ZOOKEEPER);
}
 else if (nodeGroupCreate.getInstanceNum() > 0 && nodeGroupCreate.getInstanceNum() % 2 == 0) {
warningMsgList.add(Constants.ODD_NUM_OF_ZOOKEEPER);
}
break;
case JOURNAL_NODE:
numOfJournalNode+=nodeGroupCreate.getInstanceNum();
if (nodeGroupCreate.getRoles().contains(HadoopRole.HADOOP_DATANODE.toString()) || nodeGroupCreate.getRoles().contains(HadoopRole.HADOOP_CLIENT_ROLE.toString())) {
failedMsgList.add(Constants.DATA_CLIENT_NODE_JOURNALNODE_COEXIST);
}
break;
case WORKER:
workerCount++;
if (nodeGroupCreate.getInstanceNum() == 0) {
collectInstanceNumInvalidateMsg(nodeGroupCreate,failedMsgList);
}
 else if (isHAFlag(nodeGroupCreate)) {
warningMsgList.add(Constants.WORKER_CLIENT_HA_FLAG);
}
List<String> roles=nodeGroupCreate.getRoles();
if (roles.contains(HadoopRole.HBASE_REGIONSERVER_ROLE.toString()) && !roles.contains(HadoopRole.HADOOP_DATANODE.toString())) {
warningMsgList.add(Constants.REGISONSERVER_DATANODE_SEPERATION);
}
break;
case CLIENT:
if (isHAFlag(nodeGroupCreate)) {
warningMsgList.add(Constants.WORKER_CLIENT_HA_FLAG);
}
break;
case NONE:
break;
default :
break;
}
}
}
}
if (!supportedWithHdfs2()) {
if (namenodeHACheck || masterCount > 1) {
failedMsgList.add(Constants.CURRENT_DISTRO_CAN_NOT_SUPPORT_HDFS2);
}
}
 else if (namenodeHACheck) {
if (numOfJournalNode >= 0 && numOfJournalNode < 3) {
failedMsgList.add(Constants.WRONG_NUM_OF_JOURNALNODE);
}
 else if (numOfJournalNode > 0 && numOfJournalNode % 2 == 0) {
warningMsgList.add(Constants.ODD_NUM_OF_JOURNALNODE);
}
if (zookeeperCount == 0) {
failedMsgList.add(Constants.NAMENODE_AUTO_FAILOVER_ZOOKEEPER);
}
}
if ((jobtrackerCount > 1) || (resourcemanagerCount > 1) || (zookeeperCount > 1)|| (hbasemasterCount > 1)) {
failedMsgList.add(Constants.WRONG_NUM_OF_NODEGROUPS);
}
if (numOfJournalNode > 0 && !namenodeHACheck) {
failedMsgList.add(Constants.NO_NAMENODE_HA);
}
if (!warningMsgList.isEmpty() && appendWarningStr) {
warningMsgList.set(0,"String_Node_Str" + warningMsgList.get(0));
}
}

Fixed version (ground truth):
/** 
 * Validate nodeGroupCreates member formats and values in the ClusterCreate.
 */
public void validateClusterCreate(List<String> failedMsgList,List<String> warningMsgList){
  NodeGroupCreate[] nodeGroupCreates=getNodeGroups();
  AuAssert.check(nodeGroupCreates != null && nodeGroupCreates.length > 0);
  if (hasHDFSUrlConfigured() && !validateHDFSUrl()) {
    failedMsgList.add(new StringBuilder().append("String_Node_Str").append(getExternalHDFS()).toString());
  }
  validateNodeGroupPlacementPolicies(failedMsgList,warningMsgList);
  validateStorageType(failedMsgList);
  validateSwapRatio(nodeGroupCreates,failedMsgList);
  for (  NodeGroupCreate nodeGroupCreate : nodeGroupCreates) {
    checkInstanceNum(nodeGroupCreate,failedMsgList);
    checkCPUAndMemory(nodeGroupCreate,failedMsgList,warningMsgList);
  }
  validateRoleWithWarning(failedMsgList,warningMsgList);
}