Orchestrator exceptions

500.30 ASP.NET Core app failed to start - ConfigurationErrorsException: Unrecognized configuration section system.web

Exception

Exception Info: System.Configuration.ConfigurationErrorsException: Configuration system failed to initialize ---> System.Configuration.ConfigurationErrorsException: Unrecognized configuration section system.web. (C:\Program Files (x86)\UiPath\Orchestrator\UiPath.Orchestrator.dll.config line 228)
 at void System.Configuration.ConfigurationSchemaErrors.ThrowIfErrors(bool ignoreLocal)
 at void System.Configuration.BaseConfigurationRecord.ThrowIfParseErrors(ConfigurationSchemaErrors schemaErrors)
 at void System.Configuration.BaseConfigurationRecord.ThrowIfInitErrors()
 at void System.Configuration.ClientConfigurationSystem.EnsureInit(string configKey) --- End of inner exception stack trace ---
 at System.Configuration.ConfigurationManager.PrepareConfigSystem()
 at System.Configuration.ConfigurationManager.GetSection(String sectionName)
 at UiPath.Orchestrator.Configuration.ConfigurationExtensions.AddAppConfigSection(IConfigurationBuilder builder, String sectionName, Func`2 getSection)
 at UiPath.Orchestrator.Configuration.ConfigurationExtensions.AddAppConfigSections(IConfigurationBuilder builder, String configFile)
 at UiPath.Orchestrator.Configuration.ConfigurationExtensions.AddConfigurations(IConfigurationBuilder builder, IHostEnvironment hostEnvironment, String configFile)
 at UiPath.Orchestrator.Startup.Program.<>c__DisplayClass4_0.<CreateWebHostBuilder>b__0(WebHostBuilderContext ctx, IConfigurationBuilder builder)
 at Microsoft.AspNetCore.Hosting.WebHostBuilder.BuildCommonServices(AggregateException& hostingStartupErrors)
 at Microsoft.AspNetCore.Hosting.WebHostBuilder.Build()
 at UiPath.Orchestrator.Startup.Program.Main(String[] args)
 at UiPath.Orchestrator.Startup.Program.<Main>(String[] args)

Cause

This sometimes happens when upgrading to 2021.10, and is due to the configuration system failing to initialize and returning this exception:

Exception Info: System.Configuration.ConfigurationErrorsException: Configuration system failed to initialize ---> System.Configuration.ConfigurationErrorsException: Unrecognized configuration section system.web. (C:\Program Files (x86)\UiPath\Orchestrator\UiPath.Orchestrator.dll.config line 228).

Solution

Correct the UiPath.Orchestrator.dll.config file by removing the following configuration sections and their corresponding subsections:

• <system.web>

• <system.webserver>

• <system.webServer>

• <system.serviceModel>

• <nwebsec>

• <system.net >

500.30 ASP.NET Core app failed to start - Managed server didn't initialize after X ms

Exception

Application '/LM/W3SVC/1/ROOT' with physical root 'C:\Program Files (x86)\UiPath\APPLICATIONNAME\' failed to load coreclr. Exception message:
Managed server didn't initialize after X ms.

Cause

The startup time limit might be restrictive and cause downtime in environments affected by high CPU usage and memory consumption.

Solution

Upgrade to 20.10.5+ to increase the startup time limit to 300 seconds.

If this is insufficient, it means that the server is attempting to execute something, and has a deadlock. This is usually the case when the EnableMigrations parameter is set to True, and there is a large migration hanging the main thread.

If the flag is set to False, collect a memory dump, and submit it to your customer representative.

500.30 ASP.NET Core app failed to start - System.Configuration.ConfigurationErrorsException: An error occurred loading a configuration file: Index was outside the bounds of the array

Exception

Exception Info: Unhandled exception. System.Configuration.ConfigurationErrorsException: An error occurred loading a configuration file: Index was outside the bounds of the array.
 ---> System.IndexOutOfRangeException: Index was outside the bounds of the array.
   at System.Globalization.CultureData.GetNFIValues(NumberFormatInfo nfi)
   at System.Globalization.NumberFormatInfo..ctor(CultureData cultureData)
   at System.Globalization.CultureInfo.get_NumberFormat()
   at System.Globalization.CultureInfo.GetFormat(Type formatType)
   at System.Globalization.NumberFormatInfo.get_CurrentInfo()
   at System.Guid.TryParseExactD(ReadOnlySpan`1 guidString, GuidResult& result)
   at System.Guid.TryParseExactB(ReadOnlySpan`1 guidString, GuidResult& result)
   at System.Guid.TryParseGuid(ReadOnlySpan`1 guidString, GuidResult& result)
   at System.Guid..ctor(String g)
   at System.Environment.GetKnownFolderPath(String folderGuid, SpecialFolderOption option)
   at System.Environment.GetFolderPathCore(SpecialFolder folder, SpecialFolderOption option)
   at System.Environment.GetFolderPath(SpecialFolder folder, SpecialFolderOption option)
   at System.Environment.GetFolderPath(SpecialFolder folder)
   at System.Configuration.ClientConfigPaths..ctor(String exePath, Boolean includeUserConfig)
   at System.Configuration.ClientConfigPaths.GetPaths(String exePath, Boolean includeUserConfig)
   at System.Configuration.ClientConfigurationHost.get_ConfigPaths()
   at System.Configuration.ClientConfigurationHost.GetStreamName(String configPath)
   at System.Configuration.Internal.DelegatingConfigHost.GetStreamName(String configPath)
   at System.Configuration.Internal.DelegatingConfigHost.GetStreamName(String configPath)
   at System.Configuration.ImplicitMachineConfigHost.GetStreamName(String configPath)
   at System.Configuration.BaseConfigurationRecord.InitConfigFromFile()
   --- End of inner exception stack trace ---
   at System.Configuration.ConfigurationSchemaErrors.ThrowIfErrors(Boolean ignoreLocal)
   at System.Configuration.BaseConfigurationRecord.ThrowIfParseErrors(ConfigurationSchemaErrors schemaErrors)
   at System.Configuration.BaseConfigurationRecord.ThrowIfInitErrors()
   at System.Configuration.Configuration..ctor(String locationSubPath, Type typeConfigHost, Object[] hostInitConfigurationParams)
   at System.Configuration.ClientConfigurationHost.OpenExeConfiguration(ConfigurationFileMap fileMap, Boolean isMachine, ConfigurationUserLevel userLevel, String exePath)
   at System.Configuration.ConfigurationManager.OpenExeConfigurationImpl(ConfigurationFileMap fileMap, Boolean isMachine, ConfigurationUserLevel userLevel, String exePath, Boolean preLoad)
   at System.Configuration.ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel userLevel)
   at UiPath.Orchestrator.Startup.Program.Main(String[] args)
   at UiPath.Orchestrator.Startup.Program.<Main>(String[] args)

Cause

This is a server OS issue related to number localization.

Solution

Reinstall the server via a new image with en-US settings.

500.30 ASP.NET Core app failed to start - System.ArgumentException: Argument can not be an empty collection (Parameter 'nodes') - NLog

Exception

Exception Info: System.ArgumentException: Argument can not be an empty collection (Parameter 'nodes')
   at Elasticsearch.Net.Extensions.UtilExtensions.ThrowIfEmpty[T](IEnumerable`1 object, String parameterName)
   at Elasticsearch.Net.StaticConnectionPool..ctor(IEnumerable`1 nodes, Func`2 nodeScorer, IDateTimeProvider dateTimeProvider)
   at Elasticsearch.Net.StaticConnectionPool..ctor(IEnumerable`1 nodes, Boolean randomize, IDateTimeProvider dateTimeProvider)
   at Elasticsearch.Net.StaticConnectionPool..ctor(IEnumerable`1 uris, Boolean randomize, IDateTimeProvider dateTimeProvider)
   at NLog.Targets.ElasticSearch.ElasticSearchTarget.InitializeTarget()
   at NLog.Targets.Target.Initialize(LoggingConfiguration configuration)
   at NLog.Targets.Target.NLog.Internal.ISupportsInitialize.Initialize(LoggingConfiguration configuration)
   at NLog.Config.LoggingConfiguration.InitializeAll()
   at NLog.LogFactory.ReconfigExistingLoggers()
   at NLog.LogFactory.set_Configuration(LoggingConfiguration value)
   at NLog.LogManager.set_Configuration(LoggingConfiguration value)
   at UiPath.Orchestrator.Startup.Program.InitializeNLog(String configFilePath)
   at UiPath.Orchestrator.Startup.Program.Main(String[] args)
   at UiPath.Orchestrator.Startup.Program.<Main>(String[] args)

Cause

The NlogConfigurationExceptions flag is set to true in the <nlog> section of the configuration file.

Solution

Correct the configuration or set the throwExceptions property to false in the <nlog> properties.

500.30 ASP.NET Core app failed to start - The target principal name is incorrect

Exception

Microsoft.Data.SqlClient.SqlException (0x80131904): A connection was successfully established with the server, but then an error occurred during the login process. (provider: SSL Provider, error: 0 - The target principal name is incorrect.)
---> System.ComponentModel.Win32Exception (0x80090322): The target principal name is incorrect.
  at Microsoft.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
  at Microsoft.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
  at Microsoft.Data.SqlClient.TdsParserStateObject.ThrowExceptionAndWarning(Boolean callerHasConnectionLock, Boolean asyncClose)
  at Microsoft.Data.SqlClient.TdsParserStateObject.SNIWritePacket(PacketHandle packet, UInt32& sniError, Boolean canAccumulate, Boolean callerHasConnectionLock)
  at Microsoft.Data.SqlClient.TdsParserStateObject.WriteSni(Boolean canAccumulate)
  at Microsoft.Data.SqlClient.TdsParserStateObject.WritePacket(Byte flushMode, Boolean canAccumulate)
  at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(Type serviceType)
  at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetService[T](IServiceProvider provider)
  at Microsoft.AspNetCore.Hosting.WebHost.EnsureStartup()
  at Microsoft.AspNetCore.Hosting.WebHost.EnsureApplicationServices()
  at Microsoft.AspNetCore.Hosting.WebHost.Initialize()
  at Microsoft.AspNetCore.Hosting.WebHostBuilder.Build()
  at UiPath.Orchestrator.Startup.Program.Main(String[] args)
ClientConnectionId:6f91ac8d-85c5-43df-a756-e61b34d13e68
Error Number:-2146893022,State:0,Class:20Microsoft.Data.SqlClient.SqlException (0x80131904): A connection was successfully established with the server, but then an error occurred during the login process. (provider: SSL Provider, error: 0 - The target principal name is incorrect.)
---> System.ComponentModel.Win32Exception (0x80090322): The target principal name is incorrect.
  at void Microsoft.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, bool breakConnection, Action<Action> wrapCloseInAction)
  at void Microsoft.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, bool callerHasConnectionLock, bool asyncClose)
  at void Microsoft.Data.SqlClient.TdsParserStateObject.ThrowExceptionAndWarning(bool callerHasConnectionLock, bool asyncClose)
  at Task Microsoft.Data.SqlClient.TdsParserStateObject.SNIWritePacket(PacketHandle packet, out uint sniError, bool canAccumulate, bool callerHasConnectionLock)
  at Task Microsoft.Data.SqlClient.TdsParserStateObject.WriteSni(bool canAccumulate)
  at Task Microsoft.Data.SqlClient.TdsParserStateObject.WritePacket(byte flushMode, bool canAccumulate)
  at void Microsoft.Data.SqlClient.TdsParser.TdsLogin(SqlLogin rec, FeatureExtension requestedFeatures, SessionData recoverySessionData, FederatedAuthenticationFeatureExtensionData fedAuthFeatureExtensionData)
  at void Microsoft.Data.SqlClient.SqlInternalConnectionTds.Login(ServerInfo server, TimeoutTimer timeout, string newPassword, SecureString newSecurePassword)
  at void Microsoft.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, string newPassword, SecureString newSecurePassword, bool ignoreSniOpenTimeout, TimeoutTimer timeout, bool withFailover)
  at void Microsoft.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(ServerInfo serverInfo, string newPassword, SecureString newSecurePassword, bool redirectedUserInstance, SqlConnectionString connectionOptions, SqlCredential credential, TimeoutTimer timeout)
  at void Microsoft.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(TimeoutTimer timeout, SqlConnectionString connectionOptions, SqlCredential credential, string newPassword, SecureString newSecurePassword, bool redirectedUserInstance)
  at new Microsoft.Data.SqlClient.SqlInternalConnectionTds(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, SqlCredential credential, object providerInfo, string newPassword, SecureString newSecurePassword, bool redirectedUserInstance, SqlConnectionString userConnectionOptions, SessionData reconnectSessionData, bool applyTransientFaultHandling, string accessToken, DbConnectionPool pool)
  at DbConnectionInternal Microsoft.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection, DbConnectionOptions userOptions)
  at DbConnectionInternal Microsoft.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnectionPool pool, DbConnection owningObject, DbConnectionOptions options, DbConnectionPoolKey poolKey, DbConnectionOptions userOptions)
  at DbConnectionInternal Microsoft.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection)
  at DbConnectionInternal Microsoft.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection)
  at bool Microsoft.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, uint waitForMultipleObjectsTimeout, bool allowCreate, bool onlyOneCheckConnection, DbConnectionOptions userOptions, out DbConnectionInternal connection) x 2
  at bool Microsoft.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource<DbConnectionInternal> retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, out DbConnectionInternal connection)
  at bool Microsoft.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource<DbConnectionInternal> retry, DbConnectionOptions userOptions)
  at bool Microsoft.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource<DbConnectionInternal> retry, DbConnectionOptions userOptions)
  at bool Microsoft.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource<DbConnectionInternal> retry, SqlConnectionOverrides overrides)
  at void Microsoft.Data.SqlClient.SqlConnection.Open(SqlConnectionOverrides overrides) x 2
  at string UiPath.Orchestrator.DataAccess.Common.SqlDatabaseFeatures.GetSqlServerEdition()
  at bool UiPath.Orchestrator.DataAccess.Common.SqlDatabaseFeatures.OnlineIndexOperationsSupported()
  at void UiPath.Orchestrator.Common.ApplicationContext.SetDatabaseFeatures(IConfiguration configuration, IDatabaseFeaturesFactory databaseFeaturesFactory, string connectionName, string dataMaskingFeatureFlag, string onlineIndexOperationsFeatureFlag)
  at void UiPath.Orchestrator.Common.ApplicationContext.SetUpdateServerSwitches(IConfiguration configuration, IDatabaseFeaturesFactory databaseFeaturesFactory)
  at new UiPath.Orchestrator.Startup.Startup(IConfiguration configuration, IWebHostEnvironment webHostEnvironment, ILoggerFactory loggerFactory)
  at object RuntimeMethodHandle.InvokeMethod(object target, in Span<object> arguments, Signature sig, bool constructor, bool wrapExceptions)
  at object System.Reflection.RuntimeConstructorInfo.Invoke(BindingFlags invokeAttr, Binder binder, object[] parameters, CultureInfo culture)
  at object Microsoft.Extensions.DependencyInjection.ActivatorUtilities+ConstructorMatcher.CreateInstance(IServiceProvider provider)
  at object Microsoft.Extensions.DependencyInjection.ActivatorUtilities.CreateInstance(IServiceProvider provider, Type instanceType, params object[] parameters)
  at object Microsoft.Extensions.DependencyInjection.ActivatorUtilities.GetServiceOrCreateInstance(IServiceProvider provider, Type type)
  at StartupMethods Microsoft.AspNetCore.Hosting.StartupLoader.LoadMethods(IServiceProvider hostingServiceProvider, Type startupType, string environmentName, object instance)
  at IWebHostBuilder Microsoft.AspNetCore.Hosting.WebHostBuilderExtensions.UseStartup<TStartup>(IWebHostBuilder hostBuilder, Func<WebHostBuilderContext, TStartup> startupFactory)+(IServiceProvider sp) => { }
  at TResult Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor<TArgument, TResult>.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument)
  at object Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitRootCache(ServiceCallSite callSite, RuntimeResolverContext context)
  at TResult Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor<TArgument, TResult>.VisitCallSite(ServiceCallSite callSite, TArgument argument)
  at object Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.Resolve(ServiceCallSite callSite, ServiceProviderEngineScope scope)
  at Func<ServiceProviderEngineScope, object> Microsoft.Extensions.DependencyInjection.ServiceProvider.CreateServiceAccessor(Type serviceType)
  at TValue System.Collections.Concurrent.ConcurrentDictionary<TKey, TValue>.GetOrAdd(TKey key, Func<TKey, TValue> valueFactory)
  at object Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(Type serviceType, ServiceProviderEngineScope serviceProviderEngineScope) x 2
  at T Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetService<T>(IServiceProvider provider)
  at void Microsoft.AspNetCore.Hosting.WebHost.EnsureStartup()
  at void Microsoft.AspNetCore.Hosting.WebHost.EnsureApplicationServices()
  at void Microsoft.AspNetCore.Hosting.WebHost.Initialize()
  at IWebHost Microsoft.AspNetCore.Hosting.WebHostBuilder.Build()
  at async Task UiPath.Orchestrator.Startup.Program.Main(string[] args)

Cause

Authentication to the Insights database via Integrated Authentication does not succeed.

Solution

The The target principal name is incorrect. Cannot generate SSPI context StackOverflow thread provides solutions to the issue.