Nuget package does not install the rocksdb.dll (dotnet core)

[angshuman]

C:\code\RulesLmdb\rocksdb-sharp\examples\PrefixExample>dotnet run

Unhandled Exception: System.TypeInitializationException: The type initializer for 'RocksDbSharp.Native' threw an exception. ---> NativeImport.NativeLoadException: Unable to locate rocksdb native library, either install it, or use RocksDbNative nuget package
Searched:C:\code\RulesLmdb\rocksdb-sharp\examples\PrefixExample\bin\Debug\netcoreapp2.0\native\amd64\rocksdb-5.4.6.dll: (Win32Exception) The specified module could not be found
C:\code\RulesLmdb\rocksdb-sharp\examples\PrefixExample\bin\Debug\netcoreapp2.0\native\amd64\rocksdb-5.4.dll: (Win32Exception) The specified module could not be found
C:\code\RulesLmdb\rocksdb-sharp\examples\PrefixExample\bin\Debug\netcoreapp2.0\native\amd64\rocksdb-5.dll: (Win32Exception) The specified module could not be found
C:\code\RulesLmdb\rocksdb-sharp\examples\PrefixExample\bin\Debug\netcoreapp2.0\native\amd64\rocksdb.dll: (Win32Exception) The specified module could not be found
C:\code\RulesLmdb\rocksdb-sharp\examples\PrefixExample\bin\Debug\netcoreapp2.0\native\rocksdb-5.4.6.dll: (Win32Exception) The specified module could not be found
C:\code\RulesLmdb\rocksdb-sharp\examples\PrefixExample\bin\Debug\netcoreapp2.0\native\rocksdb-5.4.dll: (Win32Exception) The specified module could not be found
C:\code\RulesLmdb\rocksdb-sharp\examples\PrefixExample\bin\Debug\netcoreapp2.0\native\rocksdb-5.dll: (Win32Exception) The specified module could not be found
C:\code\RulesLmdb\rocksdb-sharp\examples\PrefixExample\bin\Debug\netcoreapp2.0\native\rocksdb.dll: (Win32Exception) The specified module could not be found
C:\code\RulesLmdb\rocksdb-sharp\examples\PrefixExample\bin\Debug\netcoreapp2.0\amd64\rocksdb-5.4.6.dll: (Win32Exception) The specified module could not be found
C:\code\RulesLmdb\rocksdb-sharp\examples\PrefixExample\bin\Debug\netcoreapp2.0\amd64\rocksdb-5.4.dll: (Win32Exception) The specified module could not be found
C:\code\RulesLmdb\rocksdb-sharp\examples\PrefixExample\bin\Debug\netcoreapp2.0\amd64\rocksdb-5.dll: (Win32Exception) The specified module could not be found
C:\code\RulesLmdb\rocksdb-sharp\examples\PrefixExample\bin\Debug\netcoreapp2.0\amd64\rocksdb.dll: (Win32Exception) The specified module could not be found
C:\code\RulesLmdb\rocksdb-sharp\examples\PrefixExample\bin\Debug\netcoreapp2.0\rocksdb-5.4.6.dll: (Win32Exception) The specified module could not be found
C:\code\RulesLmdb\rocksdb-sharp\examples\PrefixExample\bin\Debug\netcoreapp2.0\rocksdb-5.4.dll: (Win32Exception) The specified module could not be found
C:\code\RulesLmdb\rocksdb-sharp\examples\PrefixExample\bin\Debug\netcoreapp2.0\rocksdb-5.dll: (Win32Exception) The specified module could not be found
C:\code\RulesLmdb\rocksdb-sharp\examples\PrefixExample\bin\Debug\netcoreapp2.0\rocksdb.dll: (Win32Exception) The specified module could not be found
rocksdb-5.4.6.dll: (Win32Exception) The specified module could not be found
rocksdb-5.4.dll: (Win32Exception) The specified module could not be found
rocksdb-5.dll: (Win32Exception) The specified module could not be found
rocksdb.dll: (Win32Exception) The specified module could not be found
C:\Users\asarkar.nuget\packages\rocksdbsharp\5.4.6\lib\netstandard1.6\native\amd64\rocksdb-5.4.6.dll: (Win32Exception) The specified module could not be found
C:\Users\asarkar.nuget\packages\rocksdbsharp\5.4.6\lib\netstandard1.6\native\amd64\rocksdb-5.4.dll: (Win32Exception) The specified module could not be found
C:\Users\asarkar.nuget\packages\rocksdbsharp\5.4.6\lib\netstandard1.6\native\amd64\rocksdb-5.dll: (Win32Exception) The specified module could not be found
C:\Users\asarkar.nuget\packages\rocksdbsharp\5.4.6\lib\netstandard1.6\native\amd64\rocksdb.dll: (Win32Exception) The specified module could not be found
C:\Users\asarkar.nuget\packages\rocksdbsharp\5.4.6\lib\netstandard1.6\native\rocksdb-5.4.6.dll: (Win32Exception) The specified module could not be found
C:\Users\asarkar.nuget\packages\rocksdbsharp\5.4.6\lib\netstandard1.6\native\rocksdb-5.4.dll: (Win32Exception) The specified module could not be found
C:\Users\asarkar.nuget\packages\rocksdbsharp\5.4.6\lib\netstandard1.6\native\rocksdb-5.dll: (Win32Exception) The specified module could not be found
C:\Users\asarkar.nuget\packages\rocksdbsharp\5.4.6\lib\netstandard1.6\native\rocksdb.dll: (Win32Exception) The specified module could not be found
C:\Users\asarkar.nuget\packages\rocksdbsharp\5.4.6\lib\netstandard1.6\amd64\rocksdb-5.4.6.dll: (Win32Exception) The specified module could not be found
C:\Users\asarkar.nuget\packages\rocksdbsharp\5.4.6\lib\netstandard1.6\amd64\rocksdb-5.4.dll: (Win32Exception) The specified module could not be found
C:\Users\asarkar.nuget\packages\rocksdbsharp\5.4.6\lib\netstandard1.6\amd64\rocksdb-5.dll: (Win32Exception) The specified module could not be found
C:\Users\asarkar.nuget\packages\rocksdbsharp\5.4.6\lib\netstandard1.6\amd64\rocksdb.dll: (Win32Exception) The specified module could not be found
C:\Users\asarkar.nuget\packages\rocksdbsharp\5.4.6\lib\netstandard1.6\rocksdb-5.4.6.dll: (Win32Exception) The specified module could not be found
C:\Users\asarkar.nuget\packages\rocksdbsharp\5.4.6\lib\netstandard1.6\rocksdb-5.4.dll: (Win32Exception) The specified module could not be found
C:\Users\asarkar.nuget\packages\rocksdbsharp\5.4.6\lib\netstandard1.6\rocksdb-5.dll: (Win32Exception) The specified module could not be found
C:\Users\asarkar.nuget\packages\rocksdbsharp\5.4.6\lib\netstandard1.6\rocksdb.dll: (Win32Exception) The specified module could not be found
rocksdb-5.4.6.dll: (Win32Exception) The specified module could not be found
rocksdb-5.4.dll: (Win32Exception) The specified module could not be found
rocksdb-5.dll: (Win32Exception) The specified module could not be found
rocksdb.dll: (Win32Exception) The specified module could not be found
at NativeImport.Importers.Import[T](INativeLibImporter importer, String libName, String version, Boolean suppressUnload)
at NativeImport.Auto.Import[T](String name, String version, Boolean suppressUnload) in C:\Users\wfalk\source\rocksdb-sharp\RocksDbSharp\AutoNativeImport.cs:line 39
at RocksDbSharp.Native..cctor() in C:\Users\wfalk\source\rocksdb-sharp\RocksDbSharp\Native.Load.cs:line 18
--- End of inner exception stack trace ---
at RocksDbSharp.BlockBasedTableOptions..ctor() in C:\Users\wfalk\source\rocksdb-sharp\RocksDbSharp\BlockBasedTableOptions.cs:line 18
at PrefixExample.Program.Main(String[] args) in C:\code\RulesLmdb\rocksdb-sharp\examples\PrefixExample\Program.cs:line 15

[warrenfalk]

Which nuget package? The error message you pasted says this:

NativeImport.NativeLoadException: Unable to locate rocksdb native library, either install it, or use RocksDbNative nuget package

I'm assuming you didn't install the library on the target system, so then did you add the nuget package containing the native dll?

[DaweiCai]

I met the same issue. Local build passed, but when publish the pkg to azure, it failed. Any update?

[syedhassaanahmed]

I have a .NET Core 2.1 Console App which references both NuGet packages RocksDbSharp and RocksDbNative. The app locally builds and runs fine, however when built and executed in .NET Core Linux containers (Ubuntu and Alpine), I'm getting the above exception at runtime. Any ideas how to fix that?

[syedhassaanahmed]

Update: On Ubuntu-based .NET Core 2.1 runtime images, libc6-dev is required in addition to libsnappy-dev. Alpine 3.7 based images are a dead-end right now due to this issue.