[英]Jupyter Notebook: (OperationalError('disk I/O error',))
[英]OperationalError: disk I/O error when using Process
我正在运行一个使用sqlite3作为后端的django应用程序。 我有一个函数,它执行数据库写入操作。 如下所示。
def task_run():
db_write()
在正常情况下,这可以正常工作。 我在流程模块中调用了相同的函数,并抛出了OperationalError: disk I/O error
p = Process(target=self.task_run, args=())
p.start()
p.join()
Error:
Traceback (most recent call last):
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/multiprocessing/process.py", line 258, in _bootstrap
self.run()
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/multiprocessing/process.py", line 114, in run
self._target(*self._args, **self._kwargs)
File "...runner.py", line 277, in task_runner
getattr(main, "first_function")("some random")
File "...modules/test/main.py", line 13, in first_function
self.__event__('information',"Testing plugin profiles")
File "...rc_plugin.py", line 28, in __event__
event = Event.objects.post_event(self.job_id, self.task_id, type, message)
File "...managers.py", line 39, in post_event
if len(dup_events)>0:
File "...lib/python2.7/site-packages/django/db/models/query.py", line 144, in __len__
self._fetch_all()
File "...lib/python2.7/site-packages/django/db/models/query.py", line 965, in _fetch_all
self._result_cache = list(self.iterator())
File "...lib/python2.7/site-packages/django/db/models/query.py", line 238, in iterator
results = compiler.execute_sql()
File "...lib/python2.7/site-packages/django/db/models/sql/compiler.py", line 840, in execute_sql
cursor.execute(sql, params)
File "...lib/python2.7/site-packages/django/db/backends/utils.py", line 79, in execute
return super(CursorDebugWrapper, self).execute(sql, params)
File "...lib/python2.7/site-packages/django/db/backends/utils.py", line 64, in execute
return self.cursor.execute(sql, params)
File "...lib/python2.7/site-packages/django/db/utils.py", line 97, in __exit__
six.reraise(dj_exc_type, dj_exc_value, traceback)
File "...lib/python2.7/site-packages/django/db/backends/utils.py", line 64, in execute
return self.cursor.execute(sql, params)
File "...lib/python2.7/site-packages/django/db/backends/sqlite3/base.py", line 318, in execute
return Database.Cursor.execute(self, query, params)
OperationalError: disk I/O error
知道为什么会这样吗? 如何使用多重处理调用同一函数?
我今天也遇到了这个错误,也许您可以使用内存绕行它。 如下所示:
con = sqlite3.connect(":memory:")
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