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c#sqliteserial-port.net-framework-versionwindows-10-iot-enterprise

IoErr (10), message = System.Data.SQLite.SQLiteException (0x800007FF): disk I/O error at System.Data.SQLite.SQLite3.Prepare(SQLiteConnection cnn


Please note that I am running a Windows Service application using the .NET Framework 4.6.2, and only occasionally it gets this error:

2019-04-22 18:35:36.7727|ERROR|DataIntegrator.MyService|ERROR: code = IoErr (10), message = System.Data.SQLite.SQLiteException (0x800007FF): disk I/O error
disk I/O error
   at System.Data.SQLite.SQLite3.Prepare(SQLiteConnection cnn, String strSql, SQLiteStatement previous, UInt32 timeoutMS, String& strRemain)
   at System.Data.SQLite.SQLiteCommand.BuildNextCommand()
   at System.Data.SQLite.SQLiteDataReader.NextResult()
   at System.Data.SQLite.SQLiteDataReader..ctor(SQLiteCommand cmd, CommandBehavior behave)
   at System.Data.SQLite.SQLiteCommand.ExecuteReader(CommandBehavior behavior)
   at System.Data.SQLite.SQLiteCommand.ExecuteNonQuery(CommandBehavior behavior)
   at System.Data.SQLite.SQLiteHelper.Insert(String tableName, Dictionary`2 dic) in C:\Projects\DataIntegrator\DataIntegrator\DataAccessLayer\SQLiteHelper.cs:line 254
   at System.Data.SQLite.Insert.InsertTag(Tag tag) in C:\Projects\DataIntegrator\DataIntegrator\DataAccessLayer\Query\Insert.cs:line 60

Here is my code with the error happening on the sh.Insert line:

    public static void InsertTag(Tag tag)
    {
        try
        {
            using (SQLiteConnection conn = new SQLiteConnection(Constants.DataSource))
            {
                using (SQLiteCommand cmd = new SQLiteCommand())
                {
                    cmd.Connection = conn;
                    conn.Open();

                    SQLiteHelper sh = new SQLiteHelper(cmd);

                    var dic = new Dictionary<string, object>();
                    dic["Id"] = tag.Id;
                    dic["Item"] = tag.Item;
                    dic["Value"] = tag.Value;
                    dic["Source"] = tag.Source;

                    sh.Insert(Constants.TagTable, dic);

                    conn.Close();
                }
            }
        }
        catch (Exception ex)
        {
            LogError("ERROR: {0}", ex.ToString());
        }
    }

Does anyone have any suggestions? Here are some other links I have checked but haven't found a solution yet:

SQLiteDiskIOException with error code 10: disk I/O error

sqlite3 disk I/O error on cli

https://dba.stackexchange.com/questions/93575/sqlite-disk-i-o-error-3850

https://github.com/linuxserver/docker-sonarr/issues/38

https://forums.sonarr.tv/t/disk-i-o-and-sqllite-error/5578

In the last one it mentions that the database is corrupt but when I stop the console app I can open the database. Should I be using a different database like Berkeley DB that potentially has better performance?

https://www.oracle.com/technetwork/database/database-technologies/berkeleydb/downloads/index.html

http://www.tsjensen.com/blog/post/2011/09/03/How+To+Get+Berkeley+DB+5228+And+NET+Examples+Working+In+Visual+Studio+2010+SP1

UPDATE:

Added OS to tags


Solution

  • Please note that I originally used the synchronous DataReceived event handler, which caused the CPU to be used a lot and gave me the disk I/O errors:

        private readonly SerialPort _port = null;
    
        public MySerialPort(string comPortName)
        {
            ComPortName = comPortName;
            _port = new SerialPort(ComPortName,
                9600, Parity.None, 8, StopBits.One);
                _port.DataReceived -= new
                    SerialDataReceivedEventHandler(port_DataReceived);
            _port.Open();
        }
    
        private void port_DataReceived(object sender,
            SerialDataReceivedEventArgs e)
        {
            SerialPort port = (SerialPort)sender;
            if (!port.IsOpen) return;
    
            for (int i = 0; i < port.BytesToRead; i++)
            {
                // process bytes
            }
        }
    

    In order to improve performance and resolve the I/O disk error I changed to use an async event handler via the Base class:

        private readonly SerialPort _port = null;
    
        public MySerialPort(string comPortName)
        {
            ComPortName = comPortName;
            _port = new SerialPort(ComPortName,
                9600, Parity.None, 8, StopBits.One);
             _port.Open();
             var rxData = Task.Run(async () => await ReceiveData());
            // ...
        }
    
    
    public async Task<Stream> ReceiveData()
    {
        var buffer = new byte[4096];
        int readBytes = 0;
        using (MemoryStream memoryStream = new MemoryStream())
        {
            while ((readBytes = await _port.BaseStream.ReadAsync(buffer, 0, buffer.Length)) > 0)
            {
                memoryStream.Write(buffer, 0, readBytes);
            }
    
            return memoryStream;
        }
    
    }
    

    For details, please see

    http://www.sparxeng.com/blog/software/must-use-net-system-io-ports-serialport

    and

    Correct Implementation of Async SerialPort Read