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I have a MS Exchange 2013 server that worked fine until I installed CU9 KB3087126.
Issues:
ECP is not accesible from the outside.
ECP is accessible from the inside using "https://server_name/ecp" but after entering the credentials I get a page with "Server Error in '/ecp' Application."
Could not load file or assembly 'Microsoft.Exchange.Common, Version=15.0.0.0, Culture=neutral, PublicKeyToken=token_here' or one of its dependencies. The system cannot find the file specified.
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.IO.FileNotFoundException: Could not load file or assembly 'Microsoft.Exchange.Common, Version=15.0.0.0, Culture=neutral, PublicKeyToken=token_here' or one of its dependencies. The system cannot find the file specified.
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Assembly Load Trace: The following information can be helpful to determine why the assembly 'Microsoft.Exchange.Common, Version=15.0.0.0, Culture=neutral, PublicKeyToken=token_here' could not be loaded.
WRN: Assembly binding logging is turned OFF.
To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1.
Note: There is some performance penalty associated with assembly bind failure logging.
To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog].
Stack Trace:
[FileNotFoundException: Could not load file or assembly 'Microsoft.Exchange.Common, Version=15.0.0.0, Culture=neutral, PublicKeyToken=token_here' or one of its dependencies. The system cannot find the file specified.]
System.RuntimeTypeHandle.GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMarkHandle stackMark, IntPtr pPrivHostBinder, Boolean loadTypeFromPartialName, ObjectHandleOnStack type) +0
System.RuntimeTypeHandle.GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean loadTypeFromPartialName) +153
System.Type.GetType(String typeName, Boolean throwOnError, Boolean ignoreCase) +63
System.Web.Compilation.BuildManager.GetType(String typeName, Boolean throwOnError, Boolean ignoreCase) +124
System.Web.Configuration.ConfigUtil.GetType(String typeName, String propertyName, ConfigurationElement configElement, XmlNode node, Boolean checkAptcaBit, Boolean ignoreCase) +76
>[ConfigurationErrorsException: Could not load file or assembly 'Microsoft.Exchange.Common, Version=15.0.0.0, Culture=neutral, PublicKeyToken=token_here' or one of its dependencies. The system cannot find the file specified.]
System.Web.Configuration.ConfigUtil.GetType(String typeName, String propertyName, ConfigurationElement configElement, XmlNode node, Boolean checkAptcaBit, Boolean ignoreCase) +12425660
System.Web.Configuration.Common.ModulesEntry.SecureGetType(String typeName, String propertyName, ConfigurationElement configElement) +69
System.Web.Configuration.Common.ModulesEntry..ctor(String name, String typeName, String propertyName, ConfigurationElement configElement) +62
System.Web.HttpApplication.BuildIntegratedModuleCollection(List`1 moduleList) +299
System.Web.HttpApplication.GetModuleCollection(IntPtr appContext) +1262
System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers) +133
System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context) +304
System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +404
System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +475
[HttpException (0x80004005): Could not load file or assembly 'Microsoft.Exchange.Common, Version=15.0.0.0, Culture=neutral, PublicKeyToken=token_here' or one of its dependencies. The system cannot find the file specified.]
System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +12618996
System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +159
System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +12458613
In the Event log I have a WARNING from ASP.NET 4.0.30319.0 with EventID 1310 saying:
Event code: 3008
Event message: A configuration error has occurred.
Event time: 7/20/2016 2:34:28 PM
Event time (UTC): 7/20/2016 11:34:28 AM
Event ID: a59d5b2b449a4b968766e110bc5704a6
Event sequence: 1
Event occurrence: 1
Event detail code: 0
Application information:
Application domain: /LM/W3SVC/2/ROOT/ecp-12-131134880684035632
Trust level: Full
Application Virtual Path: /ecp
Application Path: C:\Program Files\Microsoft\Exchange Server\V15\ClientAccess\ecp\
Machine name: name_here
Process information:
Process ID: 11208
Process name: w3wp.exe
Account name: NT AUTHORITY\SYSTEM
Exception information:
Exception type: ConfigurationErrorsException
Exception message: Could not load file or assembly 'Microsoft.Exchange.Common, Version=15.0.0.0, Culture=neutral, PublicKeyToken=token_here' or one of its dependencies. The system cannot find the file specified.
at System.Web.Configuration.ConfigUtil.GetType(String typeName, String propertyName, ConfigurationElement configElement, XmlNode node, Boolean checkAptcaBit, Boolean ignoreCase)
at System.Web.Configuration.Common.ModulesEntry.SecureGetType(String typeName, String propertyName, ConfigurationElement configElement)
at System.Web.Configuration.Common.ModulesEntry..ctor(String name, String typeName, String propertyName, ConfigurationElement configElement)
at System.Web.HttpApplication.BuildIntegratedModuleCollection(List`1 moduleList)
at System.Web.HttpApplication.GetModuleCollection(IntPtr appContext)
at System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers)
at System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context)
at System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context)
at System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext)
>Could not load file or assembly 'Microsoft.Exchange.Common, Version=15.0.0.0, Culture=neutral, PublicKeyToken=token_here' or one of its dependencies. The system cannot find the file specified.
at System.RuntimeTypeHandle.GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMarkHandle stackMark, IntPtr pPrivHostBinder, Boolean loadTypeFromPartialName, ObjectHandleOnStack type)
at System.RuntimeTypeHandle.GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean loadTypeFromPartialName)
at System.Type.GetType(String typeName, Boolean throwOnError, Boolean ignoreCase)
at System.Web.Compilation.BuildManager.GetType(String typeName, Boolean throwOnError, Boolean ignoreCase)
at System.Web.Configuration.ConfigUtil.GetType(String typeName, String propertyName, ConfigurationElement configElement, XmlNode node, Boolean checkAptcaBit, Boolean ignoreCase)
Request information:
Request URL: https://localhost:444/ecp/exhealth.check
Request path: /ecp/exhealth.check
User host address: ::1
User:
Is authenticated: False
Authentication Type:
Thread account name: NT AUTHORITY\SYSTEM
Thread information:
Thread ID: 35
Thread account name: NT AUTHORITY\SYSTEM
Is impersonating: False
Stack trace: at System.Web.Configuration.ConfigUtil.GetType(String typeName, String propertyName, ConfigurationElement configElement, XmlNode node, Boolean checkAptcaBit, Boolean ignoreCase)
at System.Web.Configuration.Common.ModulesEntry.SecureGetType(String typeName, String propertyName, ConfigurationElement configElement)
at System.Web.Configuration.Common.ModulesEntry..ctor(String name, String typeName, String propertyName, ConfigurationElement configElement)
at System.Web.HttpApplication.BuildIntegratedModuleCollection(List`1 moduleList)
at System.Web.HttpApplication.GetModuleCollection(IntPtr appContext)
at System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers)
at System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context)
at System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context)
at System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext)
In the Queue Viewer I have a lot of emails headed towards certain domains that are stuck with the error:
[{LRT=7/20/2016 2:40:17 PM};{LED=450 4.7.0 Proxy session setup failed on Frontend with '451 4.4.0 DNS query failed. The error was: DNS query failed with error ServerFailure'};{FQDN=correct_fqdn_here};{IP=correct_ip}]
What works:
OWA works from the inside and outside;
Apart from some emails to specific domains (small companies) inbound/outbound emails work from inside and outside of the company.(Tested with a Gmail account, testconnectivity.microsoft.com and received confirmation that emails from some big companies are being received - ex. hp.com)
Apart from the CU9 Update, nothing was changed prior to the update.
Searched the web a lot before asking but nothing helped. I'm guessing most of the issues are because ECP is not working.
Has anyone encountered this issue before and has an idea how to fix it?
Thanks in advance!
After a lot of research I ended up rebuilding the .net folders and AppPool entities in IIS. The main issue being that the IIS AppPools were not pointing to the correct ECP site, etc.
Now it works just fine.
I have a simple MVC 5 test solution that is connected to a SQL server 2008 on the intranet here. I have followed this tutorial so far:
http://www.asp.net/mvc/overview/getting-started/database-first-development/generating-views
I can open the view, and it shows the listing but when I try to create a new one I get the following error:
{"Unable to update the EntitySet 'Movies' because it has a
DefiningQuery and no <InsertFunction> element exists in the
<ModificationFunctionMapping> element to support the current
operation."}
I used the Database first approach so I have no idea what has gone wrong. I understand that somehow he can't perform an Update. Is this something I need to fix inside the project or has it to do something with SQl server?
EDIT: here is the exception details
System.Data.Entity.Infrastructure.DbUpdateException was unhandled by user code
HResult=-2146233087
Message=Unable to update the EntitySet 'Movies' because it has a DefiningQuery and no <InsertFunction> element exists in the <ModificationFunctionMapping> element to support the current operation.
Source=EntityFramework
StackTrace:
at System.Data.Entity.Internal.InternalContext.SaveChanges()
at System.Data.Entity.Internal.LazyInternalContext.SaveChanges()
at System.Data.Entity.DbContext.SaveChanges()
at TestSite.Controllers.MoviesController.Create(Movy movy) in c:\Users\Rovc\Desktop\TestSite\TestSite\Controllers\MoviesController.cs:line 54
at lambda_method(Closure , ControllerBase , Object[] )
at System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters)
at System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters)
at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters)
at System.Web.Mvc.Async.AsyncControllerActionInvoker.ActionInvocation.InvokeSynchronousActionMethod()
at System.Web.Mvc.Async.AsyncControllerActionInvoker.<BeginInvokeSynchronousActionMethod>b__39(IAsyncResult asyncResult, ActionInvocation innerInvokeState)
at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult`2.CallEndDelegate(IAsyncResult asyncResult)
at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResultBase`1.End()
at System.Web.Mvc.Async.AsyncResultWrapper.End[TResult](IAsyncResult asyncResult, Object tag)
at System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult)
at System.Web.Mvc.Async.AsyncControllerActionInvoker.AsyncInvocationWithFilters.<InvokeActionMethodFilterAsynchronouslyRecursive>b__3d()
at System.Web.Mvc.Async.AsyncControllerActionInvoker.AsyncInvocationWithFilters.<>c__DisplayClass46.<InvokeActionMethodFilterAsynchronouslyRecursive>b__3f()
InnerException: System.Data.Entity.Core.UpdateException
HResult=-2146232032
Message=Unable to update the EntitySet 'Movies' because it has a DefiningQuery and no <InsertFunction> element exists in the <ModificationFunctionMapping> element to support the current operation.
Source=EntityFramework.SqlServer
StackTrace:
at System.Data.Entity.SqlServer.SqlGen.DmlSqlGenerator.ExpressionTranslator.Visit(DbScanExpression expression)
at System.Data.Entity.Core.Common.CommandTrees.DbScanExpression.Accept(DbExpressionVisitor visitor)
at System.Data.Entity.SqlServer.SqlGen.DmlSqlGenerator.GenerateInsertSql(DbInsertCommandTree tree, SqlGenerator sqlGenerator, List`1& parameters, Boolean generateReturningSql, Boolean upperCaseKeywords, Boolean createParameters)
at System.Data.Entity.SqlServer.SqlGen.SqlGenerator.GenerateSql(DbCommandTree tree, SqlVersion sqlVersion, List`1& parameters, CommandType& commandType, HashSet`1& paramsToForceNonUnicode)
at System.Data.Entity.SqlServer.SqlProviderServices.CreateCommand(DbProviderManifest providerManifest, DbCommandTree commandTree)
at System.Data.Entity.SqlServer.SqlProviderServices.CreateDbCommandDefinition(DbProviderManifest providerManifest, DbCommandTree commandTree)
at System.Data.Entity.Core.Common.DbProviderServices.CreateDbCommandDefinition(DbProviderManifest providerManifest, DbCommandTree commandTree, DbInterceptionContext interceptionContext)
at System.Data.Entity.Core.Common.DbProviderServices.CreateCommandDefinition(DbCommandTree commandTree, DbInterceptionContext interceptionContext)
at System.Data.Entity.Core.Common.DbProviderServices.CreateCommand(DbCommandTree commandTree, DbInterceptionContext interceptionContext)
at System.Data.Entity.Core.Mapping.Update.Internal.UpdateTranslator.CreateCommand(DbModificationCommandTree commandTree)
at System.Data.Entity.Core.Mapping.Update.Internal.DynamicUpdateCommand.CreateCommand(Dictionary`2 identifierValues)
at System.Data.Entity.Core.Mapping.Update.Internal.DynamicUpdateCommand.Execute(Dictionary`2 identifierValues, List`1 generatedValues)
at System.Data.Entity.Core.Mapping.Update.Internal.UpdateTranslator.Update()
at System.Data.Entity.Core.EntityClient.Internal.EntityAdapter.<Update>b__2(UpdateTranslator ut)
at System.Data.Entity.Core.EntityClient.Internal.EntityAdapter.Update[T](T noChangesResult, Func`2 updateFunction)
at System.Data.Entity.Core.EntityClient.Internal.EntityAdapter.Update()
at System.Data.Entity.Core.Objects.ObjectContext.<SaveChangesToStore>b__35()
at System.Data.Entity.Core.Objects.ObjectContext.ExecuteInTransaction[T](Func`1 func, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction, Boolean releaseConnectionOnSuccess)
at System.Data.Entity.Core.Objects.ObjectContext.SaveChangesToStore(SaveOptions options, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction)
at System.Data.Entity.Core.Objects.ObjectContext.<>c__DisplayClass2a.<SaveChangesInternal>b__27()
at System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute[TResult](Func`1 operation)
at System.Data.Entity.Core.Objects.ObjectContext.SaveChangesInternal(SaveOptions options, Boolean executeInExistingTransaction)
at System.Data.Entity.Core.Objects.ObjectContext.SaveChanges(SaveOptions options)
at System.Data.Entity.Internal.InternalContext.SaveChanges()
InnerException:
I found the problem. The table that I was using was apparently missing a primary key. Once I designated the correct field as Primary everything worked.
The website we're hosting in Azure is regularly throwing exceptions when there are several users using the system at once (15-25 users) and retrieving, and posting data from and to the database. The exception has to do with the connection to the database.
We're using Azure SQL and Linq to SQL. I've checked the monitor of the database, and there's no report about failed connection and the amount of connections are well under what it should be able to handle.
I'm using a IoC container for making new instance of the datacontext and it's only one instance of the datacontext being initiated and are being used for querying all the tables.
I've digged into the eventlog and found the exceptions that are being thrown:
Event code: 3005
Event message: An unhandled exception has occurred.
Event time: 02.04.2013 11:48:45
Event time (UTC): 02.04.2013 11:48:45
Event ID: 09157c3457904c99b2b57abb44bef857
Event sequence: 5911
Event occurrence: 74
Event detail code: 0
Application information:
Application domain: /LM/W3SVC/1273337584/ROOT-1-130093075659455176
Trust level: Full
Application Virtual Path: /
Application Path: E:\sitesroot\0\
Machine name: RD00155D36AB20
Process information:
Process ID: 2420
Process name: w3wp.exe
Account name: NT AUTHORITY\NETWORK SERVICE
Exception information:
Exception type: SqlException
Exception message: The service is currently busy. Retry the request after 10 seconds. Incident ID: {26F49B32-6DD8-4149-89FA-780AF4BD74D3}. Code: 32771
A severe error occurred on the current command. The results, if any, should be discarded.
at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning()
at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj)
at System.Data.SqlClient.SqlDataReader.ConsumeMetaData()
at System.Data.SqlClient.SqlDataReader.get_MetaData()
at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString)
at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method)
at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method)
at System.Data.SqlClient.SqlCommand.ExecuteDbDataReader(CommandBehavior behavior)
at System.Data.Linq.SqlClient.SqlProvider.Execute(Expression query, QueryInfo queryInfo, IObjectReaderFactory factory, Object[] parentArgs, Object[] userArgs, ICompiledSubQuery[] subQueries, Object lastResult)
at System.Data.Linq.SqlClient.SqlProvider.ExecuteAll(Expression query, QueryInfo[] queryInfos, IObjectReaderFactory factory, Object[] userArguments, ICompiledSubQuery[] subQueries)
at System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execute(Expression query)
at System.Data.Linq.DataQuery1.System.Linq.IQueryProvider.Execute[S](Expression expression)
at System.Linq.Queryable.FirstOrDefault[TSource](IQueryable1 source, Expression`1 predicate)
at Holte.UK.Service.People.PersonServiceCRUD.GetCompanyIdByUserProfile(Object userID)
at Holte.UK.MvcApplication.Application_PostAcquireRequestState(Object sender, EventArgs e)
at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
Request information:
Request URL: http://www.x.x/
Request path: /
User host address: x.x.x.x
User:
Is authenticated: False
Authentication Type:
Thread account name: NT AUTHORITY\NETWORK SERVICE
Thread information:
Thread ID: 20
Thread account name: NT AUTHORITY\NETWORK SERVICE
Is impersonating: False
Stack trace: at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning()
at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj)
at System.Data.SqlClient.SqlDataReader.ConsumeMetaData()
at System.Data.SqlClient.SqlDataReader.get_MetaData()
at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString)
at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method)
at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method)
at System.Data.SqlClient.SqlCommand.ExecuteDbDataReader(CommandBehavior behavior)
at System.Data.Linq.SqlClient.SqlProvider.Execute(Expression query, QueryInfo queryInfo, IObjectReaderFactory factory, Object[] parentArgs, Object[] userArgs, ICompiledSubQuery[] subQueries, Object lastResult)
at System.Data.Linq.SqlClient.SqlProvider.ExecuteAll(Expression query, QueryInfo[] queryInfos, IObjectReaderFactory factory, Object[] userArguments, ICompiledSubQuery[] subQueries)
at System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execute(Expression query)
at System.Data.Linq.DataQuery1.System.Linq.IQueryProvider.Execute[S](Expression expression)
at System.Linq.Queryable.FirstOrDefault[TSource](IQueryable1 source, Expression`1 predicate)
at Holte.UK.Service.People.PersonServiceCRUD.GetCompanyIdByUserProfile(Object userID)
at Holte.UK.MvcApplication.Application_PostAcquireRequestState(Object sender, EventArgs e)
at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
Custom event details:
Event code: 3005
Event message: An unhandled exception has occurred.
Event time: 02.04.2013 11:46:56
Event time (UTC): 02.04.2013 11:46:56
Event ID: a8dc5c34109e4a7d9f1c74bb697d86b8
Event sequence: 5905
Event occurrence: 72
Event detail code: 0
Application information:
Application domain: /LM/W3SVC/1273337584/ROOT-1-130093075659455176
Trust level: Full
Application Virtual Path: /
Application Path: E:\sitesroot\0\
Machine name: RD00155D36AB20
Process information:
Process ID: 2420
Process name: w3wp.exe
Account name: NT AUTHORITY\NETWORK SERVICE
Exception information:
Exception type: SqlException
Exception message: A transport-level error has occurred when receiving results from the server. (provider: TCP Provider, error: 0 - An existing connection was forcibly closed by the remote host.)
at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning()
at System.Data.SqlClient.TdsParserStateObject.ReadSniError(TdsParserStateObject stateObj, UInt32 error)
at System.Data.SqlClient.TdsParserStateObject.ReadSni(DbAsyncResult asyncResult, TdsParserStateObject stateObj)
at System.Data.SqlClient.TdsParserStateObject.ReadNetworkPacket()
at System.Data.SqlClient.TdsParserStateObject.ReadByte()
at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj)
at System.Data.SqlClient.SqlDataReader.ConsumeMetaData()
at System.Data.SqlClient.SqlDataReader.get_MetaData()
at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString)
at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method)
at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method)
at System.Data.SqlClient.SqlCommand.ExecuteDbDataReader(CommandBehavior behavior)
at System.Data.Linq.SqlClient.SqlProvider.Execute(Expression query, QueryInfo queryInfo, IObjectReaderFactory factory, Object[] parentArgs, Object[] userArgs, ICompiledSubQuery[] subQueries, Object lastResult)
at System.Data.Linq.SqlClient.SqlProvider.ExecuteAll(Expression query, QueryInfo[] queryInfos, IObjectReaderFactory factory, Object[] userArguments, ICompiledSubQuery[] subQueries)
at System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execute(Expression query)
at System.Data.Linq.DataQuery1.System.Linq.IQueryProvider.Execute[S](Expression expression)
at System.Linq.Queryable.FirstOrDefault[TSource](IQueryable1 source, Expression`1 predicate)
at Holte.UK.Service.People.PersonServiceCRUD.GetCompanyIdByUserProfile(Object userID)
at Holte.UK.MvcApplication.Application_PostAcquireRequestState(Object sender, EventArgs e)
at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
Request information:
Request URL: http://www.x.x/
Request path: /
User host address: x.x.x.x
User:
Is authenticated: False
Authentication Type:
Thread account name: NT AUTHORITY\NETWORK SERVICE
Thread information:
Thread ID: 20
Thread account name: NT AUTHORITY\NETWORK SERVICE
Is impersonating: False
Stack trace: at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning()
at System.Data.SqlClient.TdsParserStateObject.ReadSniError(TdsParserStateObject stateObj, UInt32 error)
at System.Data.SqlClient.TdsParserStateObject.ReadSni(DbAsyncResult asyncResult, TdsParserStateObject stateObj)
at System.Data.SqlClient.TdsParserStateObject.ReadNetworkPacket()
at System.Data.SqlClient.TdsParserStateObject.ReadByte()
at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj)
at System.Data.SqlClient.SqlDataReader.ConsumeMetaData()
at System.Data.SqlClient.SqlDataReader.get_MetaData()
at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString)
at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method)
at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method)
at System.Data.SqlClient.SqlCommand.ExecuteDbDataReader(CommandBehavior behavior)
at System.Data.Linq.SqlClient.SqlProvider.Execute(Expression query, QueryInfo queryInfo, IObjectReaderFactory factory, Object[] parentArgs, Object[] userArgs, ICompiledSubQuery[] subQueries, Object lastResult)
at System.Data.Linq.SqlClient.SqlProvider.ExecuteAll(Expression query, QueryInfo[] queryInfos, IObjectReaderFactory factory, Object[] userArguments, ICompiledSubQuery[] subQueries)
at System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execute(Expression query)
at System.Data.Linq.DataQuery1.System.Linq.IQueryProvider.Execute[S](Expression expression)
at System.Linq.Queryable.FirstOrDefault[TSource](IQueryable1 source, Expression`1 predicate)
at Holte.UK.Service.People.PersonServiceCRUD.GetCompanyIdByUserProfile(Object userID)
at Holte.UK.MvcApplication.Application_PostAcquireRequestState(Object sender, EventArgs e)
at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
Custom event details:
Event code: 3005
Event message: An unhandled exception has occurred.
Event time: 02.04.2013 11:20:11
Event time (UTC): 02.04.2013 11:20:11
Event ID: cbf42c3adf63405293a803cb75577076
Event sequence: 5652
Event occurrence: 71
Event detail code: 0
Application information:
Application domain: /LM/W3SVC/1273337584/ROOT-1-130093075659455176
Trust level: Full
Application Virtual Path: /
Application Path: E:\sitesroot\0\
Machine name: RD00155D36AB20
Process information:
Process ID: 2420
Process name: w3wp.exe
Account name: NT AUTHORITY\NETWORK SERVICE
Exception information:
Exception type: SqlException
Exception message: Database 'xxx' on server 'xxx' is not currently available. Please retry the connection later. If the problem persists, contact customer support, and provide them the session tracing ID of '30b6d33f-4976-44b8-a586-8bfe2bc66182'.
Login failed for user 'xxx'.
at System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject)
at System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection)
at System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory)
at System.Data.SqlClient.SqlConnection.Open()
at System.Data.Linq.SqlClient.SqlConnectionManager.UseConnection(IConnectionUser user)
at System.Data.Linq.SqlClient.SqlProvider.get_IsSqlCe()
at System.Data.Linq.SqlClient.SqlProvider.InitializeProviderMode()
at System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execute(Expression query)
at System.Data.Linq.DataQuery1.System.Linq.IQueryProvider.Execute[S](Expression expression)
at System.Linq.Queryable.FirstOrDefault[TSource](IQueryable1 source, Expression`1 predicate)
at Holte.UK.Service.People.PersonServiceCRUD.GetCompanyIdByUserProfile(Object userID)
at Holte.UK.MvcApplication.Application_PostAcquireRequestState(Object sender, EventArgs e)
at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
Request information:
Request URL: http://mail.x.x/FindInspector/Companies/128?InspectorCompaniesViewModel-page=5&InspectorCompaniesViewModel-sort=Telephone-asc
Request path: /FindInspector/Companies/128
User host address: 66.249.76.91
User:
Is authenticated: False
Authentication Type:
Thread account name: NT AUTHORITY\NETWORK SERVICE
Thread information:
Thread ID: 21
Thread account name: NT AUTHORITY\NETWORK SERVICE
Is impersonating: False
Stack trace: at System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject)
at System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection)
at System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory)
at System.Data.SqlClient.SqlConnection.Open()
at System.Data.Linq.SqlClient.SqlConnectionManager.UseConnection(IConnectionUser user)
at System.Data.Linq.SqlClient.SqlProvider.get_IsSqlCe()
at System.Data.Linq.SqlClient.SqlProvider.InitializeProviderMode()
at System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execute(Expression query)
at System.Data.Linq.DataQuery1.System.Linq.IQueryProvider.Execute[S](Expression expression)
at System.Linq.Queryable.FirstOrDefault[TSource](IQueryable1 source, Expression`1 predicate)
at Holte.UK.Service.People.PersonServiceCRUD.GetCompanyIdByUserProfile(Object userID)
at Holte.UK.MvcApplication.Application_PostAcquireRequestState(Object sender, EventArgs e)
at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
Custom event details:
These are very common transient conditions in SQL Azure. I guess you have not implemented any retry logic in your code.
Take a look, read through and implement Transient Fault Handling in your application.
Best practices for handling transient conditions in SQL Azure client applications
Using the Transient Fault Handling Application Block with SQL Azure
From my understanding, this issue can be quite random if you get it or not. There are around 600 Azure SQL installations/instances running on one SQL server. The Azure installations are sharing all the resources, mdf and ldf file (this is why you have to contact support to restore your db) on that server. Therefore, if you are unlucky and end up on a server where someone uses heavy DB operations then this will affect the performance of your Azure SQL.
If you are unlucky and get the transient error a lot can another solution be to create a new Azure SQL and move your DB over there. Hopefully this will place your new Azure SQL on a different server and with less heavy DB operations from others also using the server.
I'm trying to put exception handling into my working orchestration and cannot get the exception caught. It keeps suspending the message instead of executing my exception block to handle it more gracefully.
Any suggestions?
Here are the event log messages I'm getting:
A message sent to adapter "WCF-Custom" on send port "InsertOracleMasterPort" with URI "oracledb://svd0odbd01:1529/ebsdev/Dedicated" is suspended.
Error details: Microsoft.ServiceModel.Channels.Common.ConnectionException: ORA-1017: invalid username/password; logon denied ---> Oracle.DataAccess.Client.OracleException: ORA-1017: invalid username/password; logon denied
at Oracle.DataAccess.Client.OracleException.HandleErrorHelper(Int32 errCode, OracleConnection conn, IntPtr opsErrCtx, OpoSqlValCtx* pOpoSqlValCtx, Object src, String procedure, Boolean bCheck)
at Oracle.DataAccess.Client.OracleException.HandleError(Int32 errCode, OracleConnection conn, IntPtr opsErrCtx, Object src)
at Oracle.DataAccess.Client.OracleConnection.Open()
at Microsoft.Adapters.OracleCommon.OracleCommonConnectionWrapper..ctor(String connectionString, OracleCommonExecutionHelper executionHelper)
at Microsoft.Adapters.OracleDB.OracleDBConnection.Microsoft.ServiceModel.Channels.Common.IConnection.Open(TimeSpan timeout)
--- End of inner exception stack trace ---
Server stack trace:
at Microsoft.Adapters.OracleDB.OracleDBConnection.Microsoft.ServiceModel.Channels.Common.IConnection.Open(TimeSpan timeout)
at Microsoft.ServiceModel.Channels.Common.Design.ConnectionPool.GetConnection(Guid clientId, TimeSpan timeout)
at Microsoft.ServiceModel.Channels.Common.Design.ConnectionPool.GetConnectionHandler[TConnectionHandler](Guid clientId, TimeSpan timeout, MetadataLookup metadataLookup, String& connectionId)
at Microsoft.ServiceModel.Channels.Common.Channels.AdapterRequestChannel.OnOpen(TimeSpan timeout)
at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannel.OnOpen(TimeSpan timeout)
at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
at System.ServiceModel.Channels.CommunicationObject.Open()
Exception rethrown at [0]:
at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
at System.ServiceModel.ICommunicationObject.Open()
at Microsoft.BizTalk.Adapter.Wcf.Runtime.WcfClient`2.GetChannel[TChannel](IBaseMessage bizTalkMessage, ChannelFactory`1& cachedFactory)
at Microsoft.BizTalk.Adapter.Wcf.Runtime.WcfClient`2.SendMessage(IBaseMessage bizTalkMessage)
MessageId: {1CC95FB3-E543-4011-9BDD-EABB50B75BC2}
InstanceID: {EF352982-D16C-421E-806C-58E432049951}
Second message:
xlang/s engine event log entry: Uncaught exception (see the 'inner exception' below) has suspended an instance of service 'Orchestrations.OracleInvoice(868ee765-7874-ec30-0cc7-f81ae5ebfb2b)'.
The service instance will remain suspended until administratively resumed or terminated.
If resumed the instance will continue from its last persisted state and may re-throw the same unexpected exception.
InstanceId: 7eefaf7e-0e9c-4ee6-be6e-7030ece2058b
Shape name:
ShapeId:
Exception thrown from: segment -1, progress -1
Inner exception: An error occurred while processing the message, refer to the details section for more information
Message ID: {1CC95FB3-E543-4011-9BDD-EABB50B75BC2}
Instance ID: {EF352982-D16C-421E-806C-58E432049951}
Error Description: Microsoft.ServiceModel.Channels.Common.ConnectionException: ORA-1017: invalid username/password; logon denied ---> Oracle.DataAccess.Client.OracleException: ORA-1017: invalid username/password; logon denied
at Oracle.DataAccess.Client.OracleException.HandleErrorHelper(Int32 errCode, OracleConnection conn, IntPtr opsErrCtx, OpoSqlValCtx* pOpoSqlValCtx, Object src, String procedure, Boolean bCheck)
at Oracle.DataAccess.Client.OracleException.HandleError(Int32 errCode, OracleConnection conn, IntPtr opsErrCtx, Object src)
at Oracle.DataAccess.Client.OracleConnection.Open()
at Microsoft.Adapters.OracleCommon.OracleCommonConnectionWrapper..ctor(String connectionString, OracleCommonExecutionHelper executionHelper)
at Microsoft.Adapters.OracleDB.OracleDBConnection.Microsoft.ServiceModel.Channels.Common.IConnection.Open(TimeSpan timeout)
--- End of inner exception stack trace ---
Server stack trace:
at Microsoft.Adapters.OracleDB.OracleDBConnection.Microsoft.ServiceModel.Channels.Common.IConnection.Open(TimeSpan timeout)
at Microsoft.ServiceModel.Channels.Common.Design.ConnectionPool.GetConnection(Guid clientId, TimeSpan timeout)
at Microsoft.ServiceModel.Channels.Common.Design.ConnectionPool.GetConnectionHandler[TConnectionHandler](Guid clientId, TimeSpan timeout, MetadataLookup metadataLookup, String& connectionId)
at Microsoft.ServiceModel.Channels.Common.Channels.AdapterRequestChannel.OnOpen(TimeSpan timeout)
at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannel.OnOpen(TimeSpan timeout)
at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
at System.ServiceModel.Channels.CommunicationObject.Open()
Exception rethrown at [0]:
at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
at System.ServiceModel.ICommunicationObject.Open()
at Microsoft.BizTalk.Adapter.Wcf.Runtime.WcfClient`2.GetChannel[TChannel](IBaseMessage bizTalkMessage, ChannelFactory`1& cachedFactory)
at Microsoft.BizTalk.Adapter.Wcf.Runtime.WcfClient`2.SendMessage(IBaseMessage bizTalkMessage)
Exception type: XlangSoapException
Source: Microsoft.XLANGs.BizTalk.Engine
Target Site: Void VerifyTransport(Microsoft.XLANGs.Core.Envelope, Int32, Microsoft.XLANGs.Core.Context)
The following is a stack trace that identifies the location where the exception occured
at Microsoft.BizTalk.XLANGs.BTXEngine.BTXPortBase.VerifyTransport(Envelope env, Int32 operationId, Context ctx)
at Microsoft.XLANGs.Core.Subscription.Receive(Segment s, Context ctx, Envelope& env, Boolean topOnly)
at Microsoft.XLANGs.Core.PortBase.GetMessageId(Subscription subscription, Segment currentSegment, Context cxt, Envelope& env, CachedObject location)
at Orchestrations.OracleInvoice.segment2(StopConditions stopOn)
at Microsoft.XLANGs.Core.SegmentScheduler.RunASegment(Segment s, StopConditions stopCond, Exception& exp)
Here's the orchestration:
The catch blocks use these types of error objects:
System.Web.Services.Protocols.SoapException
Microsoft.XLANGs.Core.XlangSoapException
Microsoft.XLANGs.BaseTypes.XLANGsException
General Exception
System.Exception
I thought the exception handling would bubble up and be caught in the system.exception or general handlers but that doesn't happen.
based on those posts it look like you need to create and catch wcf fault exeption
example 1
example 2
I am doing a regular update table scan
Using connect1 As New MySqlConnection(ConnectLocalhost.serverString)
connect1.Open()
Dim cmd = New MySqlCommand("set net_write_timeout=99999; set net_read_timeout=99999", connect1) ' // Setting tiimeout on mysqlServer
cmd.ExecuteNonQuery()
Dim BusinessReader = selectSomeQuery("Select * from tablebusiness limit 800,10000000", connect1)
Do While BusinessReader.Read 'random exception here
Sometimes I got this error
MySql.Data.MySqlClient.MySqlException was unhandled
ErrorCode=-2147467259
Message=Fatal error encountered during data read.
Number=0
Source=MySql.Data
StackTrace:
at MySql.Data.MySqlClient.MySqlDataReader.Read()
at dreamhost.Business.InsertLocalhost() in \\work\c\business\fromwork\currentprojects\program\library\vb.net\badger.vb:line 1849
at dreamhost.Business.surFoursquare() in \\work\c\business\fromwork\currentprojects\program\library\vb.net\badger.vb:line 1939
at dreamhost.traverseweb._Lambda$__92() in \\work\c\business\fromwork\currentprojects\program\library\vb.net\traverseweb.vb:line 77
at dreamhost.buttonClicking.startAndStopClickingButton(Object sender, Action SomeSub) in \\work\c\business\fromwork\currentprojects\program\library\vb.net\buttonclicking.vb:line 45
at dreamhost.traverseweb.foursquare_Click(Object sender, EventArgs e) in \\work\c\business\fromwork\currentprojects\program\library\vb.net\traverseweb.vb:line 77
at System.Windows.Forms.Control.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ButtonBase.WndProc(Message& m)
at System.Windows.Forms.Button.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.Run(ApplicationContext context)
at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnRun()
at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.DoApplicationModel()
at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.Run(String[] commandLine)
at dreamhost.My.MyApplication.Main(String[] Args) in 17d14f5c-a337-4978-8281-53493378c1071.vb:line 81
at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()
InnerException: MySql.Data.MySqlClient.MySqlException
ErrorCode=-2147467259
Message=Reading from the stream has failed.
Number=0
Source=MySql.Data
StackTrace:
at MySql.Data.MySqlClient.MySqlStream.LoadPacket()
at MySql.Data.MySqlClient.MySqlStream.ReadPacket()
at MySql.Data.MySqlClient.NativeDriver.FetchDataRow(Int32 statementId, Int32 columns)
at MySql.Data.MySqlClient.Driver.FetchDataRow(Int32 statementId, Int32 columns)
at MySql.Data.MySqlClient.ResultSet.GetNextRow()
at MySql.Data.MySqlClient.ResultSet.NextRow(CommandBehavior behavior)
at MySql.Data.MySqlClient.MySqlDataReader.Read()
InnerException: System.IO.IOException
Message=Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.
Source=MySql.Data
StackTrace:
at MyNetworkStream.HandleOrRethrowException(Exception e)
at MyNetworkStream.Read(Byte[] buffer, Int32 offset, Int32 count)
at MySql.Data.MySqlClient.TimedStream.Read(Byte[] buffer, Int32 offset, Int32 count)
at System.IO.BufferedStream.Read(Byte[] array, Int32 offset, Int32 count)
at MySql.Data.MySqlClient.MySqlStream.ReadFully(Stream stream, Byte[] buffer, Int32 offset, Int32 count)
at MySql.Data.MySqlClient.MySqlStream.LoadPacket()
InnerException: System.Net.Sockets.SocketException
ErrorCode=10054
Message=An existing connection was forcibly closed by the remote host
NativeErrorCode=10054
Source=System
StackTrace:
at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags)
at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)
InnerException:
All I want is for the program to just "continue" when this thing happen. But that seems to be impossible. So I guess I need a way to make sure this bug doesn't happen. It happens randomly eery 800 entries or so.
Looks to me the connection is forcibly closed by remote host. In that case, I simply want to go where things left on and restart again.
There may be a lot of reasons why the connection drops (server load, network problem, etc). That your program is crashing suggests that your database code is not protected by a try statement. If you do something like this :
try
Using connect1 As New MySqlConnection(ConnectLocalhost.serverString)
connect1.Open()
Dim cmd = New MySqlCommand("set net_write_timeout=99999; _
set net_read_timeout=99999", connect1)
cmd.ExecuteNonQuery()
Dim BusinessReader = selectSomeQuery("Select *...", connect1)
Do While BusinessReader.Read
'random exception here'
'...more code'
Loop
End Using
Catch ex As Exception
' code breaks here on exception - recover from this point '
End Try
I won't go into a protracted dissertation on exception handling but there are a lot of resources out there if you have a look. How you deal with it will depend on your specific situation - whether to log the exception, record what the last successful operation was, whether to try to resume from where you were or whether to try to do the whole thing over again, notify the user, etc.
MSDN - Try/Catch/Finally