Program: 89247
Project: 89247
Buggy source:
@Override public boolean addVirtualMachineIntoNetwork(Network network,NicProfile nic,VirtualMachineProfile<? extends VirtualMachine> profile,DeployDestination dest,ReservationContext context) throws ResourceUnavailableException {
  Long zoneId=profile.getVirtualMachine().getDataCenterIdToDeployIn();
  Long podId=profile.getVirtualMachine().getPodIdToDeployIn();
  List<HostVO> hosts=_resourceMgr.listAllUpAndEnabledHosts(Type.ExternalDhcp,null,podId,zoneId);
  if (hosts.size() == 0) {
    throw new CloudRuntimeException("String_Node_Str" + zoneId + "String_Node_Str"+ podId);
  }
  if (hosts.size() > 1) {
    throw new CloudRuntimeException("String_Node_Str" + zoneId + "String_Node_Str"+ podId);
  }
  HostVO h=hosts.get(0);
  String dns=nic.getDns1();
  if (dns == null) {
    dns=nic.getDns2();
  }
  DhcpEntryCommand dhcpCommand=new DhcpEntryCommand(nic.getMacAddress(),nic.getIp4Address(),profile.getVirtualMachine().getHostName(),dns,nic.getGateway());
  dhcpCommand.setDefaultRouter(_nicDao.findDefaultNicForVM(profile.getVirtualMachine().getId()).getGateway());
  String errMsg=String.format("String_Node_Str",h.getPrivateIpAddress(),nic.getIp4Address(),nic.getMacAddress(),profile.getVirtualMachine().getHostName());
  try {
    Answer ans=_agentMgr.send(h.getId(),dhcpCommand);
    if (ans.getResult()) {
      s_logger.debug(String.format("String_Node_Str",h.getPrivateIpAddress(),nic.getIp4Address(),nic.getMacAddress(),profile.getVirtualMachine().getHostName()));
      return true;
    }
 else {
      s_logger.debug(errMsg + "String_Node_Str" + ans.getDetails());
      throw new ResourceUnavailableException(errMsg,DataCenter.class,zoneId);
    }
  }
 catch (  Exception e) {
    s_logger.debug(errMsg,e);
    throw new ResourceUnavailableException(errMsg + e.getMessage(),DataCenter.class,zoneId);
  }
}

Fixed version (ground truth):
@Override public boolean addVirtualMachineIntoNetwork(Network network,NicProfile nic,VirtualMachineProfile<? extends VirtualMachine> profile,DeployDestination dest,ReservationContext context) throws ResourceUnavailableException {
  Long zoneId=profile.getVirtualMachine().getDataCenterIdToDeployIn();
  Long podId=profile.getVirtualMachine().getPodIdToDeployIn();
  List<HostVO> hosts=_resourceMgr.listAllUpAndEnabledHosts(Type.ExternalDhcp,null,podId,zoneId);
  if (hosts.size() == 0) {
    throw new CloudRuntimeException("String_Node_Str" + zoneId + "String_Node_Str"+ podId);
  }
  if (hosts.size() > 1) {
    throw new CloudRuntimeException("String_Node_Str" + zoneId + "String_Node_Str"+ podId);
  }
  HostVO h=hosts.get(0);
  String dns=nic.getDns1();
  if (dns == null) {
    dns=nic.getDns2();
  }
  DhcpEntryCommand dhcpCommand=new DhcpEntryCommand(nic.getMacAddress(),nic.getIp4Address(),profile.getVirtualMachine().getHostName(),dns,nic.getGateway());
  String errMsg=String.format("String_Node_Str",h.getPrivateIpAddress(),nic.getIp4Address(),nic.getMacAddress(),profile.getVirtualMachine().getHostName());
  try {
    Answer ans=_agentMgr.send(h.getId(),dhcpCommand);
    if (ans.getResult()) {
      s_logger.debug(String.format("String_Node_Str",h.getPrivateIpAddress(),nic.getIp4Address(),nic.getMacAddress(),profile.getVirtualMachine().getHostName()));
      return true;
    }
 else {
      s_logger.debug(errMsg + "String_Node_Str" + ans.getDetails());
      throw new ResourceUnavailableException(errMsg,DataCenter.class,zoneId);
    }
  }
 catch (  Exception e) {
    s_logger.debug(errMsg,e);
    throw new ResourceUnavailableException(errMsg + e.getMessage(),DataCenter.class,zoneId);
  }
}