SqlException (0x80131904): Unable to open the physical file
SQL Server LocalDB로 테스트하던 웹 사이트가 어느 순간부터 다음과 같은 오류가 발생하면서 SQL 실행이 안됩니다.
Server Error in '/' Application.
Unable to open the physical file "E:\WebApplication1\App_Data\TestDB.mdf". Operating system error 2: "2(The system cannot find the file specified.)".
Cannot attach the file 'E:\WebApplication1\App_Data\TestDB.mdf' as database 'TestDB'.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Data.SqlClient.SqlException: Unable to open the physical file "E:\WebApplication1\App_Data\TestDB.mdf". Operating system error 2: "2(The system cannot find the file specified.)".
Cannot attach the file 'E:\WebApplication1\App_Data\TestDB.mdf' as database 'TestDB'.
...[생략]...
[SqlException (0x80131904): Unable to open the physical file "E:\WebApplication1\App_Data\TestDB.mdf". Operating system error 2: "2(The system cannot find the file specified.)".
Cannot attach the file 'E:\WebApplication1\App_Data\TestDB.mdf' as database 'TestDB'.]
System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction) +133
System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose) +913
System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady) +6501
System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) +108
System.Data.SqlClient.SqlInternalConnectionTds.CompleteLogin(Boolean enlistOK) +95
System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean ignoreSniOpenTimeout, TimeoutTimer timeout, Boolean withFailover) +549
System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString connectionOptions, SqlCredential credential, TimeoutTimer timeout) +1942
System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(TimeoutTimer timeout, SqlConnectionString connectionOptions, SqlCredential credential, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance) +510
System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, SqlCredential credential, Object providerInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString userConnectionOptions, SessionData reconnectSessionData, DbConnectionPool pool, String accessToken) +918
System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection, DbConnectionOptions userOptions) +1448
System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnectionPool pool, DbConnection owningObject, DbConnectionOptions options, DbConnectionPoolKey poolKey, DbConnectionOptions userOptions) +115
System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection) +1061
System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection) +212
System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection) +2698
System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection) +233
System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection) +1671
System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions) +192
System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions) +46
System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource`1 retry) +288
System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry) +513
System.Data.SqlClient.SqlConnection.Open() +399
System.Data.Entity.SqlServer.<>c__DisplayClass1.<Execute>b__0() +34
System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute(Func`1 operation) +251
System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute(Action operation) +197
System.Data.Entity.Core.EntityClient.EntityConnection.Open() +516
[EntityException: The underlying provider failed on Open.]
System.Data.Entity.Core.EntityClient.EntityConnection.Open() +627
System.Data.Entity.Core.Objects.ObjectContext.EnsureConnection() +173
System.Data.Entity.Core.Objects.ObjectContext.ExecuteInTransaction(Func`1 func, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction, Boolean releaseConnectionOnSuccess) +645
System.Data.Entity.Core.Objects.<>c__DisplayClassb.<GetResults>b__9() +271
System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute(Func`1 operation) +251
System.Data.Entity.Core.Objects.ObjectQuery`1.GetResults(Nullable`1 forMergeOption) +600
System.Data.Entity.Core.Objects.ObjectQuery`1.<System.Collections.Generic.IEnumerable<T>.GetEnumerator>b__0() +89
System.Lazy`1.CreateValue() +713
System.Lazy`1.LazyInitValue() +572
System.Lazy`1.get_Value() +249
System.Data.Entity.Internal.LazyEnumerator`1.MoveNext() +40
System.Linq.Enumerable.SingleOrDefault(IEnumerable`1 source) +371
System.Data.Entity.Core.Objects.ELinq.ObjectQueryProvider.<GetElementFunction>b__2(IEnumerable`1 sequence) +83
System.Data.Entity.Core.Objects.ELinq.ObjectQueryProvider.ExecuteSingle(IEnumerable`1 query, Expression queryRoot) +107
System.Data.Entity.Core.Objects.ELinq.ObjectQueryProvider.System.Linq.IQueryProvider.Execute(Expression expression) +197
System.Data.Entity.Internal.Linq.DbQueryProvider.Execute(Expression expression) +149
System.Linq.Queryable.SingleOrDefault(IQueryable`1 source) +376
Microsoft.AspNet.Membership.OpenAuth.EFOpenAuthMembershipDatabase.GetMembershipUserName(String providerName, String providerUserId, Boolean updateLastUsed) +1526
Microsoft.AspNet.Membership.OpenAuth.OpenAuthManager.Login(HttpContextBase context, String providerName, String providerUserId, Boolean createPersistentCookie) +288
Microsoft.AspNet.Membership.OpenAuth.OpenAuth.Login(String providerName, String providerUserId, Boolean createPersistentCookie) +109
WebApplication1.loginProcess.Page_Load(Object sender, EventArgs e) in e:\WebApplication1\loginProcess.aspx.cs:64
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +159
System.Web.UI.Control.OnLoad(EventArgs e) +165
System.Web.UI.Control.LoadRecursive() +170
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3610
문제의 원인은, 에러 메시지에 나타난 것처럼 진짜로 "E:\WebApplication1\App_Data\TestDB.mdf" 파일이 존재하지 않았고 따라서 실제로도 그 파일을 열 수 없었기 때문에 문제가 발생한 것입니다. 그런데 이상한 것은, 지난번에 쓴 글처럼,
OpenAuth 사용 시 System.Data.SqlClient.SqlException 예외가 Output 창에 출력되는 문제
; https://www.sysnet.pe.kr/2/0/10811
저는 분명히 LocalDB를 사용했고, 없는 경우 자동으로 생성하는 구조였기 때문에 파일이 없다는 것만으로 오류로 빠지는 것은 말이 안되었습니다.
그러다가, 얼핏 연결 문자열을 살펴보게 되었는데,
<connectionStrings>
<add name="DefaultConnection" connectionString="Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\TestDB.mdf;Initial Catalog=TestDB;Integrated Security=True;User Instance=True" providerName="System.Data.SqlClient" />
</connectionStrings>
웬일인지, LocalDB가 아니라 SQLExpress가 사용되고 있었던 것입니다. 따라서 연결 문자열을 다시 LocalDB용으로 바꾸는 것으로,
Data Source=(LocalDb)\mssqllocaldb;AttachDbFilename=|DataDirectory|\TestDB.mdf;Initial Catalog=TestDB;Integrated Security=True;
문제를 해결했습니다. 가만 생각해 보니, 해당 프로젝트를 LocalDB가 아닌 SQL Express가 설치된 PC에서 열었던 적이 있었고 그 와중에 뭔가 연결 문자열이 LocalDB에서 SQLExpress로 변경된 듯 했습니다. (여러 컴퓨터에서 작업하다 보니 이런 문제도 발생하는군요. ^^)
[이 글에 대해서 여러분들과 의견을 공유하고 싶습니다. 틀리거나 미흡한 부분 또는 의문 사항이 있으시면 언제든 댓글 남겨주십시오.]