Operationalerror: Database Is Locked

OperationalError: database is locked

From django doc:

SQLite is meant to be a lightweight
database, and thus can't support a
high level of concurrency.
OperationalError: database is locked
errors indicate that your application
is experiencing more concurrency than
sqlite can handle in default
configuration. This error means that
one thread or process has an exclusive
lock on the database connection and
another thread timed out waiting for
the lock the be released.

Python's SQLite wrapper has a default
timeout value that determines how long
the second thread is allowed to wait
on the lock before it times out and
raises the OperationalError: database
is locked error.

If you're getting this error, you can
solve it by:

Switching to another database backend. At a certain point SQLite becomes too "lite" for real-world applications, and these sorts of concurrency errors indicate you've reached that point.

Rewriting your code to reduce concurrency and ensure that database transactions are short-lived.

Increase the default timeout value by setting the timeout database option

http://docs.djangoproject.com/en/dev/ref/databases/#database-is-locked-errorsoption

operational error: database is locked

This is what this error means:

SQLite is meant to be a lightweight database, and thus can't support a
high level of concurrency. OperationalError: database is locked errors
indicate that your application is experiencing more concurrency than
sqlite can handle in default configuration. This error means that one
thread or process has an exclusive lock on the database connection and
another thread timed out waiting for the lock the be released.

Python's SQLite wrapper has a default timeout value that determines
how long the second thread is allowed to wait on the lock before it
times out and raises the OperationalError: database is locked error.

If you're getting this error, you can solve it by:

Switching to another database backend. At a certain point SQLite
becomes too "lite" for real-world applications, and these sorts of
concurrency errors indicate you've reached that point.

Rewriting your code to reduce concurrency and ensure that database
transactions are short-lived.

Increase the default timeout value by setting the timeout database
option.

Probably you have another connection in your code that is not closed or not committed and this cause this error. Basically trying to do second execute when it is already locked by the another one. If you really want to have your concurrent transactions you need to have a RDBMS.

OperationalError: database is locked when deploying site to Azure

It seems like a duplication of this question: OperationalError: database is locked.

From the documentation of Django:
https://docs.djangoproject.com/en/dev/ref/databases/#database-is-locked-errorsoption

SQLite is meant to be a lightweight database, and thus can’t support a
high level of concurrency. OperationalError: database is locked errors
indicate that your application is experiencing more concurrency than
sqlite can handle in default configuration. This error means that one
thread or process has an exclusive lock on the database connection and
another thread timed out waiting for the lock the be released.

Python’s SQLite wrapper has a default timeout value that determines
how long the second thread is allowed to wait on the lock before it
times out and raises the OperationalError: database is locked error.

If you’re getting this error, you can solve it by:

Switching to another database backend. At a certain point SQLite
becomes too “lite” for real-world applications, and these sorts of
concurrency errors indicate you’ve reached that point.

Rewriting your code to reduce concurrency and ensure that database
transactions are short-lived.

Increase the default timeout value by setting the timeout database
option

I have been developing a Django web app as well, and I chose a Azure SQL Server to be the database of the application. Everything has been working OK.

Telethon: OperationalError: database is locked

Referring to the Telethon documentation, The database will be locked if you don't close it properly.

In your case, you are using the same session file from many TelegramClient's at once.

First

In [9] client.start()

TelegramClient started

Second

In [13] client.connect()

TelegramClient's already active

This also causes the database is locked error. More info:

Telethon Issue: OperationalError: database is locked

To solve the "DataBase is locked" error,

you'll have to restart/abort the kernal and then remove the already created session from your local directory. Remove the client.connect() line from the code as it's getting connected at the first line itself.

The session file must be created with the following name as {phone}.session in the directory where your python code is kept.

Django Test database table is locked

Database is locked errors

SQLite is meant to be a lightweight database, and thus can’t support a high level of concurrency. OperationalError: database is locked errors indicate that your application is experiencing more concurrency than sqlite can handle in default configuration. This error means that one thread or process has an exclusive lock on the database connection and another thread timed out waiting for the lock the be released.

Python’s SQLite wrapper has a default timeout value that determines how long the second thread is allowed to wait on the lock before it times out and raises the OperationalError: database is locked error.

If you’re getting this error, you can solve it by:

Switching to another database backend. At a certain point SQLite becomes too “lite” for real-world applications, and these sorts of concurrency errors indicate you’ve reached that point.

Rewriting your code to reduce concurrency and ensure that database transactions are short-lived.

Increase the default timeout value by setting the timeout database option:

'OPTIONS': {
    # ...
    'timeout': 20,
    # ...
}

This will make SQLite wait a bit longer before throwing “database is locked” errors; it won’t really do anything to solve them.

https://docs.djangoproject.com/en/3.0/ref/databases/#database-is-locked-errorsoption

sqlite3.OperationalError: database is locked error

Is Google Chrome open while you're trying to do this? Sometimes you can't write to a file that another process is already using, and it will say it's locked.

What's making this code lock my aiosqlite database?

SQLite is meant to be a lightweight database, and thus can't support a high level of concurrency. OperationalError: database is locked errors indicate that your application is experiencing more concurrency than SQLite can handle in default configuration. This error means that one thread or process has an exclusive lock on the database connection and another thread timed out waiting for the lock to be released.

Python's SQLite wrapper has a default timeout value that determines how long the second thread is allowed to wait on the lock before it times out and raises the OperationalError: database is locked error.

Ways to solve this error

Switching to another database backend. At a certain point, SQLite becomes too "lite" for real-world applications, and these sorts of concurrency errors indicate you've reached that point.
Increase the default timeout value by setting the timeout database option
Rewriting your code to reduce concurrency and ensure that database transactions are short-lived.

Python SQLite: database is locked

Turned out the problem happened because the path to the db file was actually a samba mounted dir. I moved it and that started working.