Program: 115579
Project: 115579
Buggy source:
public static void handleApplicationInstanceTerminatedEvent(String applicationId,String instanceId){
  if (log.isDebugEnabled()) {
    log.debug("String_Node_Str" + applicationId + "String_Node_Str"+ instanceId);
  }
  Application application=ApplicationHolder.getApplications().getApplication(applicationId);
  ApplicationContext applicationContext=AutoscalerContext.getInstance().getApplicationContext(applicationId);
  if ((application == null) || (applicationContext == null)) {
    log.warn("String_Node_Str" + applicationId);
  }
 else {
    ApplicationInstance applicationInstance=application.getInstanceContexts(instanceId);
    ApplicationStatus status=ApplicationStatus.Terminated;
    if (applicationInstance.isStateTransitionValid(status)) {
      applicationInstance.setStatus(status);
      updateApplicationMonitor(applicationId,status,applicationInstance.getNetworkPartitionId(),instanceId);
      ApplicationMonitor applicationMonitor=AutoscalerContext.getInstance().getAppMonitor(applicationId);
      NetworkPartitionContext networkPartitionContext=applicationMonitor.getNetworkPartitionContext(applicationInstance.getNetworkPartitionId());
      networkPartitionContext.removeInstanceContext(instanceId);
      applicationMonitor.removeNetworkPartitionContext(applicationInstance.getNetworkPartitionId());
      applicationMonitor.removeInstance(instanceId);
      application.removeInstance(instanceId);
      ApplicationHolder.persistApplication(application);
      ApplicationsEventPublisher.sendApplicationInstanceTerminatedEvent(applicationId,instanceId);
      if (application.getInstanceContextCount() == 0 && applicationMonitor.isTerminating()) {
        if (applicationMonitor.hasMonitors() && applicationMonitor.isTerminating()) {
          for (          Monitor monitor1 : applicationMonitor.getAliasToActiveChildMonitorsMap().values()) {
            monitor1.destroy();
          }
        }
        applicationMonitor.destroy();
        AutoscalerContext.getInstance().removeAppMonitor(applicationId);
        applicationContext.setStatus(ApplicationContext.STATUS_CREATED);
        AutoscalerContext.getInstance().updateApplicationContext(applicationContext);
        RegistryManager.getInstance().persistApplicationContext(applicationContext);
        log.info("String_Node_Str" + applicationId);
      }
    }
 else {
      log.warn(String.format("String_Node_Str" + "String_Node_Str",applicationId,application.getInstanceContexts(instanceId).getStatus(),status));
    }
  }
}

Fixed version (ground truth):
public static void handleApplicationInstanceTerminatedEvent(String applicationId,String instanceId){
  if (log.isDebugEnabled()) {
    log.debug("String_Node_Str" + applicationId + "String_Node_Str"+ instanceId);
  }
  Application application=ApplicationHolder.getApplications().getApplication(applicationId);
  ApplicationContext applicationContext=AutoscalerContext.getInstance().getApplicationContext(applicationId);
  if ((application == null) || (applicationContext == null)) {
    log.warn("String_Node_Str" + applicationId);
  }
 else {
    ApplicationInstance applicationInstance=application.getInstanceContexts(instanceId);
    ApplicationStatus status=ApplicationStatus.Terminated;
    if (applicationInstance.isStateTransitionValid(status)) {
      applicationInstance.setStatus(status);
      updateApplicationMonitor(applicationId,status,applicationInstance.getNetworkPartitionId(),instanceId);
      ApplicationMonitor applicationMonitor=AutoscalerContext.getInstance().getAppMonitor(applicationId);
      NetworkPartitionContext networkPartitionContext=applicationMonitor.getNetworkPartitionContext(applicationInstance.getNetworkPartitionId());
      networkPartitionContext.removeInstanceContext(instanceId);
      applicationMonitor.removeNetworkPartitionContext(applicationInstance.getNetworkPartitionId());
      applicationMonitor.removeInstance(instanceId);
      application.removeInstance(instanceId);
      ApplicationHolder.persistApplication(application);
      ApplicationsEventPublisher.sendApplicationInstanceTerminatedEvent(applicationId,instanceId);
      if (application.getInstanceContextCount() == 0 && applicationMonitor.isTerminating()) {
        if (applicationMonitor.hasMonitors() && applicationMonitor.isTerminating()) {
          for (          Monitor monitor1 : applicationMonitor.getAliasToActiveChildMonitorsMap().values()) {
            monitor1.destroy();
          }
        }
        applicationMonitor.destroy();
        AutoscalerContext.getInstance().removeAppMonitor(applicationId);
        AutoscalerContext.getInstance().removeNetworkPartitionAlgorithmContext(applicationId);
        applicationContext.setStatus(ApplicationContext.STATUS_CREATED);
        AutoscalerContext.getInstance().updateApplicationContext(applicationContext);
        RegistryManager.getInstance().persistApplicationContext(applicationContext);
        log.info("String_Node_Str" + applicationId);
      }
    }
 else {
      log.warn(String.format("String_Node_Str" + "String_Node_Str",applicationId,application.getInstanceContexts(instanceId).getStatus(),status));
    }
  }
}