我正在尝试异步使用web服务,因为它需要45秒才能返回。不幸的是,这个web服务也有点不可靠,可能会抛出错误。我已经设置了django-celery
并执行了我的任务,它工作得很好,直到任务在max_retries
之外失败。
这是我到目前为止所知道的:
@task(default_retry_delay=5, max_retries=10)
def request(xml):
try:
server = Client('https://www.whatever.net/RealTimeService.asmx?wsdl')
xml = server.service.RunRealTimeXML(
username=settings.WS_USERNAME,
password=settings.WS_PASSWORD,
xml=xml
)
except Exception, e:
result = Result(celery_id=request.request.id, details=e.reason, status="i")
result.save()
try:
return request.retry(exc=e)
except MaxRetriesExceededError, e:
result = Result(celery_id=request.request.id, details="Max Retries Exceeded", status="f")
result.save()
raise
result = Result(celery_id=request.request.id, details=xml, status="s")
result.save()
return result
不幸的是,retry()
没有抛出MaxRetriesExceededError
,所以我不确定如何处理这个任务的失败。Django已经将HTML返回给了客户端,我正在通过AJAX检查Result
的内容,它永远不会进入full fail f
状态。
因此,问题是:当Celery任务超过max_retries
时,我如何更新数据库
发布于 2016-02-27 10:39:53
问题是,当芹菜达到重试限制时,它会尝试重新引发您传入的异常。执行此重新提升的代码如下:https://github.com/celery/celery/blob/v3.1.20/celery/app/task.py#L673-L681
解决这个问题最简单的方法就是根本不让celery来管理你的异常:
@task(max_retries=10)
def mytask():
try:
do_the_thing()
except Exception as e:
try:
mytask.retry()
except MaxRetriesExceededError:
do_something_to_handle_the_error()
logger.exception(e)
发布于 2012-02-20 21:21:11
在Celery版本2.3.2中,这种方法对我来说效果很好:
class MyTask(celery.task.Task):
abstract = True
def after_return(self, status, retval, task_id, args, kwargs, einfo):
if self.max_retries == self.request.retries:
#If max retries is equal to task retries do something
@task(base=MyTask, default_retry_delay=5, max_retries=10)
def request(xml):
#Your stuff here
发布于 2014-05-23 08:37:16
我只是暂时这样做,省去了对Task进行子类化的工作,而且很容易理解。
# auto-retry with delay as defined below. After that, hook is disabled.
@celery.shared_task(bind=True, max_retries=5, default_retry_delay=300)
def post_data(self, hook_object_id, url, event, payload):
headers = {'Content-type': 'application/json'}
try:
r = requests.post(url, data=payload, headers=headers)
r.raise_for_status()
except requests.exceptions.RequestException as e:
if self.request.retries >= self.max_retries:
log.warning("Auto-deactivating webhook %s for event %s", hook_object_id, event)
Webhook.objects.filter(object_id=hook_object_id).update(active=False)
return False
raise self.retry(exc=e)
return True
https://stackoverflow.com/questions/6499952
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