Program: 90008
Project: 90008
Buggy source:
/** 
 * Create user on the system. Synchronized to prevent multiple threads from trying to create user at the same time.
 * @param user  user id
 * @param group group id
 * @throws GenieException If there is any problem.
 */
protected synchronized void createUser(final String user,final String group) throws GenieException {
  final CommandLine idCheckCommandLine=new CommandLine("String_Node_Str");
  idCheckCommandLine.addArgument("String_Node_Str");
  idCheckCommandLine.addArgument(user);
  try {
    this.executor.execute(idCheckCommandLine);
    log.debug("String_Node_Str");
  }
 catch (  final IOException ioe) {
    log.debug("String_Node_Str");
    final boolean isGroupValid=StringUtils.isNotBlank(group) && !group.equals(user);
    if (isGroupValid) {
      log.debug("String_Node_Str");
      final CommandLine groupCreateCommandLine=new CommandLine("String_Node_Str");
      groupCreateCommandLine.addArgument("String_Node_Str");
      groupCreateCommandLine.addArgument(group);
      try {
        log.debug("String_Node_Str" + groupCreateCommandLine.toString() + "String_Node_Str");
        this.executor.execute(groupCreateCommandLine);
      }
 catch (      IOException ioexception) {
        log.debug("String_Node_Str");
      }
    }
    final CommandLine userCreateCommandLine=new CommandLine("String_Node_Str");
    userCreateCommandLine.addArgument("String_Node_Str");
    userCreateCommandLine.addArgument(user);
    if (isGroupValid) {
      userCreateCommandLine.addArgument("String_Node_Str");
      userCreateCommandLine.addArgument(group);
    }
    userCreateCommandLine.addArgument("String_Node_Str");
    try {
      log.debug("String_Node_Str" + userCreateCommandLine.toString() + "String_Node_Str");
      this.executor.execute(userCreateCommandLine);
    }
 catch (    IOException ioexception) {
      throw new GenieServerException("String_Node_Str" + user + "String_Node_Str"+ ioexception);
    }
  }
}

Fixed version (ground truth):
/** 
 * Create user on the system. Synchronized to prevent multiple threads from trying to create user at the same time.
 * @param user  user id
 * @param group group id
 * @throws GenieException If there is any problem.
 */
protected synchronized void createUser(final String user,final String group) throws GenieException {
  final CommandLine idCheckCommandLine=new CommandLine("String_Node_Str").addArgument("String_Node_Str").addArgument(user);
  try {
    this.executor.execute(idCheckCommandLine);
    log.debug("String_Node_Str");
  }
 catch (  final IOException ioe) {
    log.debug("String_Node_Str");
    final boolean isGroupValid=StringUtils.isNotBlank(group) && !group.equals(user);
    if (isGroupValid) {
      log.debug("String_Node_Str");
      final CommandLine groupCreateCommandLine=new CommandLine("String_Node_Str").addArgument("String_Node_Str").addArgument(group);
      try {
        log.debug("String_Node_Str" + groupCreateCommandLine.toString() + "String_Node_Str");
        this.executor.execute(groupCreateCommandLine);
      }
 catch (      IOException ioexception) {
        log.debug("String_Node_Str");
      }
    }
    final CommandLine userCreateCommandLine=new CommandLine("String_Node_Str").addArgument("String_Node_Str").addArgument(user);
    if (isGroupValid) {
      userCreateCommandLine.addArgument("String_Node_Str").addArgument(group);
    }
    userCreateCommandLine.addArgument("String_Node_Str");
    try {
      log.debug("String_Node_Str" + userCreateCommandLine.toString() + "String_Node_Str");
      this.executor.execute(userCreateCommandLine);
    }
 catch (    IOException ioexception) {
      throw new GenieServerException("String_Node_Str" + user + "String_Node_Str"+ ioexception);
    }
  }
}