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我們有一個.NET Windows Service將WCF服務公開給用戶界面和我們系統的其他部分。它的目標是.NET Framework 4.5並使用SQLite 1.0.92二進制文件與底層SQLite數據庫進行通信。但是，運行SQLite.Interop.dll中的AccessViolationException（通過Windows事件查看器找到）一段時間後，Windows服務崩潰（自動停止）。我遇到了有關Connection close中的這個異常的文章，但在我們所有的情況下，我們在使用WCF服務公開的方法查詢或寫入數據庫時遇到此異常。堆疊跟蹤如下：WCF服務中的SQLite AccessViolationException
Application: OurServer.exe
Framework Version: **v4.0.30319**
Description: The process was terminated due to an unhandled exception.
Exception Info: System.AccessViolationException
Stack:
at System.Data.SQLite.UnsafeNativeMethods.sqlite3_bind_int(IntPtr, Int32, Int32)
at System.Data.SQLite.UnsafeNativeMethods.sqlite3_bind_int(IntPtr, Int32, Int32)
at System.Data.SQLite.SQLite3.Bind_Int32(System.Data.SQLite.SQLiteStatement, System.Data.SQLite.SQLiteConnectionFlags, Int32, Int32)
at System.Data.SQLite.SQLiteStatement.BindParameter(Int32, System.Data.SQLite.SQLiteParameter)
at System.Data.SQLite.SQLiteStatement.BindParameters()
at System.Data.SQLite.SQLiteCommand.GetStatement(Int32)
at System.Data.SQLite.SQLiteDataReader.NextResult()
at System.Data.SQLite.SQLiteDataReader..ctor(System.Data.SQLite.SQLiteCommand, System.Data.CommandBehavior)
at System.Data.SQLite.SQLiteCommand.ExecuteReader(System.Data.CommandBehavior)
at System.Data.SQLite.SQLiteCommand.ExecuteNonQuery(System.Data.CommandBehavior)
at DataAccess.Sqlite.ExecuteCommand(System.Collections.ObjectModel.Collection`1<System.String>, System.Collections.ObjectModel.Collection`1<System.Data.Common.DbParameter[]>)
at Data.Settings.Save(System.Collections.ObjectModel.Collection`1<Common.Operation>)
at DynamicClass.SyncInvokeSaveOperation(System.Object, System.Object[], System.Object[])
at System.ServiceModel.Dispatcher.SyncMethodInvoker.Invoke(System.Object, System.Object[], System.Object[] ByRef)
at System.ServiceModel.Dispatcher.DispatchOperationRuntime.InvokeBegin(System.ServiceModel.Dispatcher.MessageRpc ByRef)
at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage5(System.ServiceModel.Dispatcher.MessageRpc ByRef)
at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage31(System.ServiceModel.Dispatcher.MessageRpc ByRef)
at System.ServiceModel.Dispatcher.MessageRpc.Process(Boolean)
at System.ServiceModel.Dispatcher.ChannelHandler.DispatchAndReleasePump(System.ServiceModel.Channels.RequestContext, Boolean, System.ServiceModel.OperationContext)
at System.ServiceModel.Dispatcher.ChannelHandler.HandleRequest(System.ServiceModel.Channels.RequestContext, System.ServiceModel.OperationContext)
at System.ServiceModel.Dispatcher.ChannelHandler.AsyncMessagePump(System.IAsyncResult)
at System.Runtime.Fx+AsyncThunk.UnhandledExceptionFrame(System.IAsyncResult)
at System.Runtime.AsyncResult.Complete(Boolean)
at System.Runtime.InputQueue`1+AsyncQueueReader[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].Set(Item<System.__Canon>)
at System.Runtime.InputQueue`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].EnqueueAndDispatch(Item<System.__Canon>, Boolean)
at System.Runtime.InputQueue`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].EnqueueAndDispatch(System.__Canon, System.Action, Boolean)
at System.ServiceModel.Channels.SingletonChannelAcceptor`3[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].Enqueue(System.__Canon, System.Action, Boolean)
at System.ServiceModel.Channels.ConnectionDemuxer+CompleteSingletonPreambleAndDispatchRequestAsyncResult.OnPreambleComplete(System.IAsyncResult)
at System.Runtime.Fx+AsyncThunk.UnhandledExceptionFrame(System.IAsyncResult)
at System.Runtime.AsyncResult.Complete(Boolean)
at System.ServiceModel.Channels.ServerSingletonPreambleConnectionReader+CompletePreambleAsyncResult.OnWriteCompleted(System.Object)
at System.ServiceModel.Channels.SocketConnection.OnSendAsync(System.Object, System.Net.Sockets.SocketAsyncEventArgs)
at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
at System.Net.Sockets.SocketAsyncEventArgs.FinishOperationSuccess(System.Net.Sockets.SocketError, Int32, System.Net.Sockets.SocketFlags)
at System.Net.Sockets.SocketAsyncEventArgs.CompletionPortCallback(UInt32, UInt32, System.Threading.NativeOverlapped*)
at System.Threading._IOCompletionCallback.PerformIOCompletionCallback(UInt32, UInt32, System.Threading.NativeOverlapped*)
我們使用來自 「源碼-netFx45二進制束-Win32-2012-1.0.92.0」（來自http://system.data.sqlite.org/index.html/doc/trunk/www/downloads.wiki下載）SQLite的組件。這些程序集作爲Windows服務的一部分捆綁在一起，不在GAC中。這種行爲在32位和64位機器上都是一致的。僅供參考，我們不使用混合模式組件。
我們的連接字符串：
Data Source=ourapp.db;Version=3;New=False;Compress=True;PRAGMA cache_size=20000; PRAGMA page_size=32768; PRAGMA synchronous=off"
和SQLite數據庫文件是Windows的 「ProgramData」 文件夾中。
stacktrace將Framework版本顯示爲「v4.0.30319」，而我們在服務的應用程序配置中將目標版本顯式設置爲4.5。但是，該機器安裝了兩個版本。
另外，我編寫了一個簡單的控制檯應用程序，該應用程序從多個線程調用相同的WCF服務方法，但無法模擬相同的AccessViolationException。因此，我不認爲這可能是一個負載或併發訪問相關的問題。這個例外似乎是隨機的，除了運行服務並等待它發生之外，我們沒有辦法一貫地重新產生問題。
任何可能會導致此問題的指針非常感謝。
UPDATE：
代碼使用ExecuteCommand的兩個變種：
public int ExecuteCommand(string query, params DbParameter[] parameters)
{
try
{
this.result = -1;
this.OpenConnection();
this.command = new SQLiteCommand(query, this.connnection);
this.HandleParameters(parameters);
this.result = this.command.ExecuteNonQuery();
}
catch (Exception ex)
{
this.result = -1;
}
finally
{
if (this.command != null)
{
this.command.Dispose();
}
this.CloseConnection();
}
return this.result;
}
public int ExecuteCommand(Collection<string> queries, Collection<DbParameter[]> parameters)
{
try
{
this.result = -1;
this.OpenConnection();
this.command = new SQLiteCommand();
this.command.Connection = this.connnection;
this.transaction = this.connnection.BeginTransaction();
for (int i = 0; i < queries.Count; i++)
{
this.command.Parameters.Clear();
this.command.CommandText = queries[i];
this.command.CommandTimeout = this.timeOut;
this.command.Transaction = this.transaction;
DbParameter[] cmdParams = new DbParameter[] { };
if (parameters != null)
{
cmdParams = parameters[i];
}
this.HandleParameters(cmdParams);
this.result += this.command.ExecuteNonQuery();
}
this.transaction.Commit();
}
catch (Exception ex)
{
if (this.transaction != null)
{
this.transaction.Rollback();
}
this.result = -1;
}
finally
{
if (this.command != null)
{
this.command.Dispose();
}
this.CloseConnection();
}
return this.result;
}
更新2：代碼保存方法
Collection<DbParameter[]> dbparameters = new Collection<DbParameter[]>();
DbParameter[] dbparams;
SQLiteParameter sqlparams;
Collection<string> queries = new Collection<string>();
int icount = 0;
foreach (Operation operation in operations)
{
icount = 0;
dbparams = new DbParameter[4];
queries.Add("UPDATE table1 SET col1 = @Col1, col2 = @col2, " +
"Timestamp = @Timestamp WHERE Id = @Id");
sqlparams = new SQLiteParameter();
sqlparams.DbType = DbType.String;
sqlparams.ParameterName = "@Timestamp";
sqlparams.Value = string.Format(CultureInfo.InvariantCulture, "{0:yyyy-MM-dd HH:mm:ss}", operation.Timestamp);
dbparams[icount++] = sqlparams;
sqlparams = new SQLiteParameter();
sqlparams.DbType = DbType.String;
sqlparams.ParameterName = "@Id";
sqlparams.Value = operation.Id;
dbparams[icount++] = sqlparams;
sqlparams = new SQLiteParameter();
sqlparams.DbType = DbType.String;
sqlparams.ParameterName = "@Col1";
sqlparams.Value = operation.Col1;
dbparams[icount++] = sqlparams;
sqlparams = new SQLiteParameter();
sqlparams.DbType = DbType.String;
sqlparams.ParameterName = "@Col2";
sqlparams.Value = operation.Col2;
dbparams[icount++] = sqlparams;
dbparameters.Add(dbparams);
}
return (DataAccess.Sqlite.ExecuteCommand(queries, dbparameters) > -1);
你可以顯示一些'DataAccess.SqlLite.ExecuteCommand'和'Data.Settings.Save'方法的代碼嗎？ – nvoigt
我已經使用ExecuteCommand的代碼更新了帖子。 Save方法組成查詢及其參數，並調用接受查詢集合的重載方法。 – Ananth
Save方法的更多更新 – Ananth