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Redis 队列工作器在 utcparse 中崩溃

本文介绍了Redis 队列工作器在 utcparse 中崩溃的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我正在尝试按照 https://blog.miguelgrinberg.com/post/the-flask-mega-tutorial-part-xxii-background-jobs.

我在 Windows 10 WSL1 ubuntu 20.04 上运行.

我使用 sudo apt-get install python3-rq 安装了 rq，rq 的版本是 1.2.2

我使用 pip3 install rq 安装了 python 库，然后是 1.4.0 版.

我的工作代码在 app/tasks.py 中，并且是

导入时间定义示例():print('开始任务')对于我在范围内(1..10):打印(一)#time.sleep(1)print('任务完成')

当我执行 $ rq worker testrq 时，这似乎开始正常，并报告

 Worker rq:worker:6080c3a42475423895995e6da528ad2e:开始，版本 1.2.2*** 正在听 testrq...队列的清理注册表:testrq

然后在另一个终端上启动 python3 并发出命令:

>>>从 redis 导入 Redis>>>进口rq>>>q = rq.Queue('testrq', connection=Redis.from_url('redis://'))>>>job = q.enqueue('app.tasks.example')

当输入最后一条语句时，监听进程报告以下内容，然后退出:

回溯(最近一次调用最后一次):文件/usr/lib/python3/dist-packages/rq/utils.py"，第 169 行，在 utcparse 中返回 datetime.datetime.strptime(string, _TIMESTAMP_FORMAT)文件/usr/lib/python3.8/_strptime.py"，第 568 行，在 _strptime_datetimett，分数，gmtoff_fraction = _strptime(数据字符串，格式)文件/usr/lib/python3.8/_strptime.py"，第 349 行，在 _strptimeraise ValueError("时间数据 %r 与格式 %r 不匹配" %ValueError: 时间数据 '' 与格式 '%Y-%m-%dT%H:%M:%S.%fZ' 不匹配在处理上述异常的过程中，又发生了一个异常:回溯(最近一次调用最后一次):文件/usr/lib/python3/dist-packages/rq/worker.py"，第508行，工作中结果 = self.dequeue_job_and_maintain_ttl(超时)文件/usr/lib/python3/dist-packages/rq/worker.py"，第 574 行，在 dequeue_job_and_maintain_ttl结果 = self.queue_class.dequeue_any(self.queues, timeout,文件/usr/lib/python3/dist-packages/rq/queue.py"，第 539 行，在 dequeue_any作业 = job_class.fetch(job_id, connection=connection)文件/usr/lib/python3/dist-packages/rq/job.py"，第303行，在fetch中作业.刷新()文件/usr/lib/python3/dist-packages/rq/job.py"，第 515 行，刷新self.restore(数据)恢复中的文件/usr/lib/python3/dist-packages/rq/job.py"，第 478 行self.started_at = str_to_date(obj.get('started_at'))文件/usr/lib/python3/dist-packages/rq/utils.py"，第 256 行，在 str_to_date 中返回 utcparse(as_text(date_str))文件/usr/lib/python3/dist-packages/rq/utils.py"，第 172 行，utcparsereturn datetime.datetime.strptime(string, '%Y-%m-%dT%H:%M:%SZ')文件/usr/lib/python3.8/_strptime.py"，第 568 行，在 _strptime_datetimett，分数，gmtoff_fraction = _strptime(数据字符串，格式)文件/usr/lib/python3.8/_strptime.py"，第 349 行，在 _strptimeraise ValueError("时间数据 %r 与格式 %r 不匹配" %ValueError: 时间数据 '' 与格式 '%Y-%m-%dT%H:%M:%SZ' 不匹配

谁能告诉我如何解决这个问题?谢谢

PS 在搜索互联网时，我确实遇到了 https://github.com/rq/rq/issues/927;不确定这是否相关.

解决方案

以防万一有人遇到问题...

我设法升级了我的 Windows 10 操作系统并启用了 WSL2.然后任务运行正常，所以我只能假设这是 WSL1 中某个地方的错误.

当然，它立即突出显示了我在 range(1..10) 中的语法错误.哦！Ruby 可能会消失，但显然不会被遗忘！

I'm trying to get a basic rq working following the tutorial at https://blog.miguelgrinberg.com/post/the-flask-mega-tutorial-part-xxii-background-jobs.

I'm running on windows 10 WSL1 ubuntu 20.04.

I installed rq using sudo apt-get install python3-rq and rq is at version 1.2.2

I installed the python lib using pip3 install rq and this is then at version 1.4.0.

My worker code is in app/tasks.py and is

import time

def example():
    print('Starting task')
    for i in range(1..10):
        print(i)
        #time.sleep(1)
    print('Task completed')

When I do $ rq worker testrq this seems to start ok, and reports

   Worker rq:worker:6080c3a42475423895995e6da528ad2e: started, version 1.2.2
   *** Listening on testrq...
   Cleaning registries for queue: testrq

On another terminal I then start python3 and issue the commands:

>>> from redis import Redis
>>> import rq
>>> q = rq.Queue('testrq', connection=Redis.from_url('redis://'))
>>> job = q.enqueue('app.tasks.example')

When that last statement is entered the listening process reports the following, then exits:

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/rq/utils.py", line 169, in utcparse
    return datetime.datetime.strptime(string, _TIMESTAMP_FORMAT)
  File "/usr/lib/python3.8/_strptime.py", line 568, in _strptime_datetime
    tt, fraction, gmtoff_fraction = _strptime(data_string, format)
  File "/usr/lib/python3.8/_strptime.py", line 349, in _strptime
    raise ValueError("time data %r does not match format %r" %
ValueError: time data '' does not match format '%Y-%m-%dT%H:%M:%S.%fZ'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/rq/worker.py", line 508, in work
    result = self.dequeue_job_and_maintain_ttl(timeout)
  File "/usr/lib/python3/dist-packages/rq/worker.py", line 574, in dequeue_job_and_maintain_ttl
    result = self.queue_class.dequeue_any(self.queues, timeout,
  File "/usr/lib/python3/dist-packages/rq/queue.py", line 539, in dequeue_any
    job = job_class.fetch(job_id, connection=connection)
  File "/usr/lib/python3/dist-packages/rq/job.py", line 303, in fetch
    job.refresh()
  File "/usr/lib/python3/dist-packages/rq/job.py", line 515, in refresh
    self.restore(data)
  File "/usr/lib/python3/dist-packages/rq/job.py", line 478, in restore
    self.started_at = str_to_date(obj.get('started_at'))
  File "/usr/lib/python3/dist-packages/rq/utils.py", line 256, in str_to_date
    return utcparse(as_text(date_str))
  File "/usr/lib/python3/dist-packages/rq/utils.py", line 172, in utcparse
    return datetime.datetime.strptime(string, '%Y-%m-%dT%H:%M:%SZ')
  File "/usr/lib/python3.8/_strptime.py", line 568, in _strptime_datetime
    tt, fraction, gmtoff_fraction = _strptime(data_string, format)
  File "/usr/lib/python3.8/_strptime.py", line 349, in _strptime
    raise ValueError("time data %r does not match format %r" %
ValueError: time data '' does not match format '%Y-%m-%dT%H:%M:%SZ'

Can anyone please tell me how to fix this? Thanks

PS On searching the internet I did come across https://github.com/rq/rq/issues/927; not sure if this is related or not.

解决方案

Just in case someone has the some problem ...

I managed to get my Windows 10 OS upgraded and enabled WSL2. The task then ran ok, so I can only assume this was a bug in WSL1 somewhere.

Of course, it immediately highlighted my syntax error in range(1..10). Doh! Ruby may be gone, but clearly not forgotten!

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08-07 07:02
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