After a reboot the problem appeared again. Here is the last part of the logfile.
15-8-10 17:41:02.9|Info|Bootstrap|Starting Sonarr - /share/MD0_DATA/.qpkg/QSonarr/NzbDrone/NzbDrone.exe - Version 2.0.0.3243
15-8-10 17:41:04.4|Info|AppFolderInfo|Data directory is being overridden to [/share/MD0_DATA/SONARR_CONFIG]
15-8-10 17:41:06.3|Debug|ProcessProvider|Found 0 processes with the name: NzbDrone.Console
15-8-10 17:41:07.4|Debug|ProcessProvider|Found 1 processes with the name: NzbDrone
15-8-10 17:41:08.2|Info|MigrationLogger|*** Migrating data source=/share/MD0_DATA/SONARR_CONFIG/nzbdrone.db;cache size=-10485760;datetimekind=Utc;journal mode=Wal;pooling=True;version=3 ***
15-8-10 17:41:08.3|Fatal|ConsoleApp|EPIC FAIL!
System.TypeInitializationException: An exception was thrown by the type initializer for System.Data.SQLite.SQLiteFactory —> System.EntryPointNotFoundException: sqlite3_config
at (wrapper managed-to-native) System.Data.SQLite.UnsafeNativeMethods:sqlite3_config_none (System.Data.SQLite.SQLiteConfigOpsEnum)
at System.Data.SQLite.SQLite3.StaticIsInitialized () [0x00000] in :0
at System.Data.SQLite.SQLiteLog.Initialize () [0x00000] in :0
at System.Data.SQLite.SQLiteFactory…cctor () [0x00000] in :0
— End of inner exception stack trace —
at NzbDrone.Core.Datastore.Migration.Framework.MigrationDbFactory.CreateFactory () [0x00000] in :0
at FluentMigrator.Runner.Processors.DbFactoryBase.get_Factory () [0x00000] in :0
at FluentMigrator.Runner.Processors.DbFactoryBase.CreateConnection (System.String connectionString) [0x00000] in :0
at NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSqliteProcessorFactory.Create (System.String connectionString, IAnnouncer announcer, IMigrationProcessorOptions options) [0x00000] in :0
at NzbDrone.Core.Datastore.Migration.Framework.MigrationController.MigrateToLatest (System.String connectionString, MigrationType migrationType, System.Action1 beforeMigration) [0x00000] in <filename unknown>:0 at NzbDrone.Core.Datastore.DbFactory.Create (MigrationType migrationType, System.Action
1 beforeMigration) [0x00000] in :0
at NzbDrone.Core.Datastore.DbFactory.RegisterDatabase (IContainer container) [0x00000] in :0
at NzbDrone.Host.Bootstrap.Start (ApplicationModes applicationModes, NzbDrone.Common.EnvironmentInfo.StartupContext startupContext) [0x00000] in :0
at NzbDrone.Host.Bootstrap.Start (NzbDrone.Common.EnvironmentInfo.StartupContext startupContext, IUserAlert userAlert, System.Action`1 startCallback) [0x00000] in :0
at NzbDrone.Console.ConsoleApp.Main (System.String[] args) [0x00000] in :0