Program: 107489
Project: 107489
Buggy source:
@DB public boolean deleteHost(long hostId){
  Transaction txn=Transaction.currentTxn();
  try {
    HostVO host=_hostDao.findById(hostId);
    if (host == null) {
      if (s_logger.isDebugEnabled()) {
        s_logger.debug("String_Node_Str" + hostId + "String_Node_Str");
      }
      return true;
    }
    if (host.getType() == Type.SecondaryStorage) {
      return deleteSecondaryStorageHost(host);
    }
    if (s_logger.isDebugEnabled()) {
      s_logger.debug("String_Node_Str" + hostId + "String_Node_Str"+ host.getGuid());
    }
    if (host.getType() == Type.Routing && host.getHypervisorType() == Hypervisor.Type.XenServer) {
      if (host.getClusterId() != null) {
        List<HostVO> hosts=_hostDao.listBy(Type.Routing,host.getClusterId(),host.getPodId(),host.getDataCenterId());
        for (        HostVO thost : hosts) {
          long thostId=thost.getId();
          if (thostId == hostId)           continue;
          PoolEjectCommand eject=new PoolEjectCommand(host.getGuid());
          Answer answer=easySend(thostId,eject);
          if (answer == null || !answer.getResult()) {
            s_logger.debug("String_Node_Str" + hostId + "String_Node_Str"+ thostId+ "String_Node_Str"+ answer.getDetails());
            continue;
          }
          break;
        }
      }
    }
    txn.start();
    _dcDao.releasePrivateIpAddress(host.getPrivateIpAddress(),host.getDataCenterId(),null);
    AgentAttache attache=_agents.get(hostId);
    handleDisconnect(attache,Status.Event.Remove,false);
    _hostDao.remove(hostId);
    ComponentLocator locator=ComponentLocator.getLocator("String_Node_Str");
    _storagePoolHostDao=locator.getDao(StoragePoolHostDao.class);
    if (_storagePoolHostDao == null) {
      throw new ConfigurationException("String_Node_Str" + StoragePoolHostDao.class);
    }
    ArrayList<Long> pool_ids=_storagePoolHostDao.getPoolIds(hostId);
    _storagePoolHostDao.deletePrimaryRecordsForHost(hostId);
    if (!pool_ids.isEmpty()) {
      _storagePoolDao.deleteStoragePoolRecords(pool_ids);
    }
    txn.commit();
    return true;
  }
 catch (  Throwable t) {
    s_logger.error("String_Node_Str" + hostId,t);
    return false;
  }
}

Fixed version (ground truth):
@DB public boolean deleteHost(long hostId){
  Transaction txn=Transaction.currentTxn();
  try {
    HostVO host=_hostDao.findById(hostId);
    if (host == null) {
      if (s_logger.isDebugEnabled()) {
        s_logger.debug("String_Node_Str" + hostId + "String_Node_Str");
      }
      return true;
    }
    if (host.getType() == Type.SecondaryStorage) {
      return deleteSecondaryStorageHost(host);
    }
    if (s_logger.isDebugEnabled()) {
      s_logger.debug("String_Node_Str" + hostId + "String_Node_Str"+ host.getGuid());
    }
    if (host.getType() == Type.Routing && host.getHypervisorType() == Hypervisor.Type.XenServer) {
      if (host.getClusterId() != null) {
        List<HostVO> hosts=_hostDao.listBy(Type.Routing,host.getClusterId(),host.getPodId(),host.getDataCenterId());
        for (        HostVO thost : hosts) {
          long thostId=thost.getId();
          if (thostId == hostId)           continue;
          PoolEjectCommand eject=new PoolEjectCommand(host.getGuid());
          Answer answer=easySend(thostId,eject);
          if (answer == null || !answer.getResult()) {
            s_logger.debug("String_Node_Str" + hostId + "String_Node_Str"+ thostId+ "String_Node_Str"+ answer.getDetails());
            continue;
          }
          break;
        }
      }
    }
    txn.start();
    _dcDao.releasePrivateIpAddress(host.getPrivateIpAddress(),host.getDataCenterId(),null);
    AgentAttache attache=_agents.get(hostId);
    handleDisconnect(attache,Status.Event.Remove,false);
    host.setGuid(null);
    host.setClusterId(null);
    _hostDao.update(host.getId(),host);
    _hostDao.remove(hostId);
    ComponentLocator locator=ComponentLocator.getLocator("String_Node_Str");
    _storagePoolHostDao=locator.getDao(StoragePoolHostDao.class);
    if (_storagePoolHostDao == null) {
      throw new ConfigurationException("String_Node_Str" + StoragePoolHostDao.class);
    }
    ArrayList<Long> pool_ids=_storagePoolHostDao.getPoolIds(hostId);
    _storagePoolHostDao.deletePrimaryRecordsForHost(hostId);
    if (!pool_ids.isEmpty()) {
      _storagePoolDao.deleteStoragePoolRecords(pool_ids);
    }
    txn.commit();
    return true;
  }
 catch (  Throwable t) {
    s_logger.error("String_Node_Str" + hostId,t);
    return false;
  }
}