Program: 107463
Project: 107463
Buggy source:
@Override @DB public boolean stop(DomainRouterVO router,long eventId){
  long routerId=router.getId();
  router=_routerDao.acquire(routerId);
  if (router == null) {
    s_logger.debug("String_Node_Str" + routerId);
    return false;
  }
  EventVO event=new EventVO();
  event.setUserId(1L);
  event.setAccountId(router.getAccountId());
  event.setType(EventTypes.EVENT_ROUTER_STOP);
  event.setState(EventState.Started);
  event.setDescription("String_Node_Str" + routerId);
  event.setStartId(eventId);
  _eventDao.persist(event);
  try {
    if (s_logger.isDebugEnabled())     s_logger.debug("String_Node_Str" + routerId + "String_Node_Str");
    if (router.getRemoved() != null) {
      s_logger.debug("String_Node_Str" + routerId + "String_Node_Str");
      return false;
    }
    final Long hostId=router.getHostId();
    final State state=router.getState();
    if (state == State.Stopped || state == State.Destroyed || state == State.Expunging || router.getRemoved() != null) {
      s_logger.debug("String_Node_Str");
      return true;
    }
    event=new EventVO();
    event.setUserId(1L);
    event.setAccountId(router.getAccountId());
    event.setType(EventTypes.EVENT_ROUTER_STOP);
    event.setStartId(eventId);
    if (!_routerDao.updateIf(router,Event.StopRequested,hostId)) {
      s_logger.debug("String_Node_Str" + router.toString() + "String_Node_Str");
      return false;
    }
    if (hostId == null) {
      s_logger.debug("String_Node_Str" + router.toString() + "String_Node_Str");
      return false;
    }
    final StopCommand stop=new StopCommand(router,router.getInstanceName(),router.getVnet(),router.getPrivateIpAddress());
    Answer answer=null;
    boolean stopped=false;
    try {
      answer=_agentMgr.send(hostId,stop);
      if (!answer.getResult()) {
        s_logger.error("String_Node_Str");
        event.setDescription("String_Node_Str" + router.getName());
        event.setLevel(EventVO.LEVEL_ERROR);
        _eventDao.persist(event);
      }
 else {
        stopped=true;
      }
    }
 catch (    AgentUnavailableException e) {
      s_logger.warn("String_Node_Str" + router.getId());
    }
catch (    OperationTimedoutException e) {
      s_logger.warn("String_Node_Str" + router.getId());
      s_logger.error("String_Node_Str");
    }
    if (!stopped) {
      event.setDescription("String_Node_Str" + router.getName());
      event.setLevel(EventVO.LEVEL_ERROR);
      _eventDao.persist(event);
      _routerDao.updateIf(router,Event.OperationFailed,router.getHostId());
      return false;
    }
    completeStopCommand(router,Event.OperationSucceeded);
    event.setDescription("String_Node_Str" + router.getName());
    _eventDao.persist(event);
    if (s_logger.isDebugEnabled()) {
      s_logger.debug("String_Node_Str" + router.toString() + "String_Node_Str");
    }
    processStopOrRebootAnswer(router,answer);
  }
  finally {
    if (s_logger.isDebugEnabled())     s_logger.debug("String_Node_Str" + routerId + "String_Node_Str");
    _routerDao.release(routerId);
  }
  return true;
}

Fixed version (ground truth):
@Override @DB public boolean stop(DomainRouterVO router,long eventId){
  long routerId=router.getId();
  router=_routerDao.acquire(routerId);
  if (router == null) {
    s_logger.debug("String_Node_Str" + routerId);
    return false;
  }
  EventVO event=new EventVO();
  event.setUserId(1L);
  event.setAccountId(router.getAccountId());
  event.setType(EventTypes.EVENT_ROUTER_STOP);
  event.setState(EventState.Started);
  event.setDescription("String_Node_Str" + routerId);
  event.setStartId(eventId);
  event=_eventDao.persist(event);
  if (eventId == 0) {
    eventId=event.getId();
  }
  try {
    if (s_logger.isDebugEnabled())     s_logger.debug("String_Node_Str" + routerId + "String_Node_Str");
    if (router.getRemoved() != null) {
      s_logger.debug("String_Node_Str" + routerId + "String_Node_Str");
      return false;
    }
    final Long hostId=router.getHostId();
    final State state=router.getState();
    if (state == State.Stopped || state == State.Destroyed || state == State.Expunging || router.getRemoved() != null) {
      s_logger.debug("String_Node_Str");
      return true;
    }
    event=new EventVO();
    event.setUserId(1L);
    event.setAccountId(router.getAccountId());
    event.setType(EventTypes.EVENT_ROUTER_STOP);
    event.setStartId(eventId);
    if (!_routerDao.updateIf(router,Event.StopRequested,hostId)) {
      s_logger.debug("String_Node_Str" + router.toString() + "String_Node_Str");
      return false;
    }
    if (hostId == null) {
      s_logger.debug("String_Node_Str" + router.toString() + "String_Node_Str");
      return false;
    }
    final StopCommand stop=new StopCommand(router,router.getInstanceName(),router.getVnet(),router.getPrivateIpAddress());
    Answer answer=null;
    boolean stopped=false;
    try {
      answer=_agentMgr.send(hostId,stop);
      if (!answer.getResult()) {
        s_logger.error("String_Node_Str");
        event.setDescription("String_Node_Str" + router.getName());
        event.setLevel(EventVO.LEVEL_ERROR);
        _eventDao.persist(event);
      }
 else {
        stopped=true;
      }
    }
 catch (    AgentUnavailableException e) {
      s_logger.warn("String_Node_Str" + router.getId());
    }
catch (    OperationTimedoutException e) {
      s_logger.warn("String_Node_Str" + router.getId());
      s_logger.error("String_Node_Str");
    }
    if (!stopped) {
      event.setDescription("String_Node_Str" + router.getName());
      event.setLevel(EventVO.LEVEL_ERROR);
      _eventDao.persist(event);
      _routerDao.updateIf(router,Event.OperationFailed,router.getHostId());
      return false;
    }
    completeStopCommand(router,Event.OperationSucceeded);
    event.setDescription("String_Node_Str" + router.getName());
    _eventDao.persist(event);
    if (s_logger.isDebugEnabled()) {
      s_logger.debug("String_Node_Str" + router.toString() + "String_Node_Str");
    }
    processStopOrRebootAnswer(router,answer);
  }
  finally {
    if (s_logger.isDebugEnabled())     s_logger.debug("String_Node_Str" + routerId + "String_Node_Str");
    _routerDao.release(routerId);
  }
  return true;
}