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
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
UPDATE:
Added OS to tags
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