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T15:06:27.667751427Z Entity Framework Core 2.1.4 initialized 'AppDbContext' using provider '' with options: None T15:06:27.662478400Z Executing action method (InsecureSite) with arguments () - Validation state: Valid public async Task SignIn( SignInModel model). _dbContext is injected with scoped lifetime. When I call dbContext.SaveChanges(), after adding one very simple entity, the request takes about 30 seconds before throwing the following error: If you search on the Sqlite Documentation, they recomend open the connection once and never close it.I have a simple asp.net core web app (v2.1), that I deployed to a B1 (and I tried B2) Azure App Service on Linux. If I'm wrong with something or someone want to add something, I'm going to glad to reed it. This way, we are going to reuse the connection and SQLite handle everything.Īnd as I said above, never close the connection. Public static SQLiteConnection GetConnection()Ĭonn = DependencyService.Get().GetConn() Var conn = new SQLite.SQLiteConnection(path, SQLiteOpenFlags.ReadWrite | SQLiteOpenFlags.Create | SQLiteOpenFlags.FullMutex, true) Ĭreate only one connection with the DB and never close it (Shared project).
Sqlite database locked android#
Using "SQLiteOpenFlags.FullMutex, true" in Android project (It seens with this we avoid the SIGSEGV crashes). I was searching for a while and I did finish thinking that this maybe is the best approach to work with local database and concurrency (without use BeginTransaction, Commit, Close and Dispose). So I need your help guys to solve the problem (database locked) and review if my implementation with the SQLite is OK.ĭid this solution work for you? I am going through the same problem. Var conn = new SQLite.SQLiteConnection(path, SQLiteOpenFlags.ReadWrite | SQLiteOpenFlags.Create | SQLiteOpenFlags.SharedCache) Var path = Path.Combine(documentsPath, sqliteFileName) Var sqliteFileName = "FN_Desarrollo.db3" Public SQLite.SQLiteConnection GetConnection()
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public class Configuracion : IConfiguracion "Un error a ocurrido con la DB (Actualizar): " + (), "Un error a ocurrido con la DB (Insert): " + (), Use locks to avoid database collisionsĪ( Private static object collisionLock = new object() Ĭnn = DependencyService.Get().GetConnection() Īll methods have the collisionLock (to avoid conflict with database) and cnn.Dispose() (To close connection with the database and avoid the error Fatal signal 11 (SIGSEGV)) ĭataContext.cs public interface IBusinessEntity In DataContext.cs we have the connection with the local database and all the methods with the local database. I use a class DataService.cs where that class connect with the DataContext.cs and make the connection with database and methods CRUD.Īll methods in the DataService have the same way to connect with DataContext //This is a resume of DataService.cs So I need help to solve this, I know that there are a lot of post about this problem, but base on my implamentation with my database, it seems not to be enough to solve my problem. Sometimes when the app is sync up with the API, I'm getting the error "database is LOCKED", when I'm making another operation on the App.
![sqlite database locked sqlite database locked](https://1.bp.blogspot.com/-yE5SL5RJBeo/Xfn5QyaaowI/AAAAAAAACj0/h4N8pQOzoswJGoRa7q78Xdjf_R0KPs2LwCLcBGAsYHQ/s1600/Schermata%2B2019-12-18%2Balle%2B11.02.17.png)
I'm working on a App that have more than 50 tables and can work without internet connection, so in background the app can sync up with the API and get all the information and make the CRUD operation in local.