SQLiteCommand cmd1 = new SQLiteCommand("INSERT INTO B ('Data') SELECT WHERE NOT EXISTS (SELECT ID, Data FROM B WHERE Data = bItems) Ĭmd1. SQLiteCommand cmd = new SQLiteCommand("select ID, Data from B where Data like 'P%'", con) Using (SQLiteConnection con = new SQLiteConnection(databaseObject.m圜onnection)) Can someone explain how can I fix this error. My understanding is I am getting it somehow due to "break". However, it is giving me error of : 'database is locked database is locked' code line cmd1.ExecuteNonQuery(). ![]() I used "break" to get out once data is found and perform the same action with new value of bItems. Im using provider in an ASP.NET application (framework 4.0). Also, if availalbe, retrieving information on where it is stored. It eventually works, but it takes a long time due to all the retries.I am using code below to enter data into sqllite database if it does not exist in it. Should I chunk these into small jobs? I haven’t tried but not sure if/why this would help. Is there a way to check if the database is locked before queueing a new job to ingest data? ![]() I guess this is because the SQLite DB is getting pretty busy ingesting all these datapoints, but what can i do about it? Original exception was: (sqlite3.OperationalError) database is locked To begin a new transaction with this Session, first issue Session.rollback(). The pager module only tracks four of the five locking states. : This Session's transaction has been rolled back due to a previous exception during flush. From the point of view of a single process, a database file can be in one of five locking states: The operating system interface layer understands and tracks all five locking states described above. Self._raise_for_prerequisite_state(fn._name_, current_state)įile "/usr/local/lib/python3.11/site-packages/sqlalchemy/orm/session.py", line 906, in _raise_for_prerequisite_state Instance._commit_event_session_or_retry()įile "/usr/src/homeassistant/homeassistant/components/recorder/core.py", line 1155, in _commit_event_session_or_retryįile "/usr/src/homeassistant/homeassistant/components/recorder/core.py", line 1175, in _commit_event_sessionįile "/usr/local/lib/python3.11/site-packages/sqlalchemy/orm/session.py", line 1906, in commitįile "/usr/local/lib/python3.11/site-packages/sqlalchemy/orm/state_changes.py", line 103, in _go In particular, if you dont describe any then you get auto-commit behavior, with a lock held for the duration of each statement and then dropped as the statement finishes. (Background on this error at: ) (Background on this error at: )įile "/usr/src/homeassistant/homeassistant/components/recorder/core.py", line 904, in _process_one_task_or_recoverįile "/usr/src/homeassistant/homeassistant/components/recorder/tasks.py", line 305, in run SQLite does whatever locking is necessary in order to implement the transaction scheme that your SQL statements describe. On first setup, I often get errors like the following: 13:16:58.272 ERROR (Recorder) SQLAlchemyError error processing task CommitTask(): This Session's transaction has been rolled back due to a previous exception during flush. If youve got 3+ threads that all insert, you should use a different database. ![]() SQLite is not designed for concurrency, but it can be made to work for a couple threads that dont INSERT often. Alternatively, if you retry on locking errors, they wont prevent the program from completing. ![]() Working on a new integration, which loads historical data state and stats. If serialized to one thread, it wont have locking errors.
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