System.Runtime.Serialization.SerializationException: Unable to find assembly

[Stefan Falk]

I created a bridge to a .dll file that depends on two other .dll files..

somehow I can access the Client.dll but when I access the Server.dll I receive:

Exception in thread "main" System.Runtime.Serialization.SerializationException: Unable to find assembly 'SibKernel.Server, Version=2.5.1.0, Culture=neutral, PublicKeyToken=null'.

Server stack trace: 

   at System.Runtime.Serialization.Formatters.Binary.BinaryAssemblyInfo.GetAssembly()

   at System.Runtime.Serialization.Formatters.Binary.ObjectReader.GetType(BinaryAssemblyInfo assemblyInfo, String name)

   at System.Runtime.Serialization.Formatters.Binary.BinaryConverter.TypeFromInfo(BinaryTypeEnum binaryTypeEnum, Object typeInformation, ObjectReader objectReader, BinaryAssemblyInfo assemblyInfo, InternalPrimitiveTypeE& primitiveTypeEnum, String& typeString, Type& type, Boolean& isVariant)

   at System.Runtime.Serialization.Formatters.Binary.__BinaryParser.ReadArray(BinaryHeaderEnum binaryHeaderEnum)

   at System.Runtime.Serialization.Formatters.Binary.__BinaryParser.Run()

   at System.Runtime.Serialization.Formatters.Binary.ObjectReader.Deserialize(HeaderHandler handler, __BinaryParser serParser, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage)

   at System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize(Stream serializationStream, HeaderHandler handler, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage)

   at System.Runtime.Remoting.Channels.CoreChannel.DeserializeBinaryResponseMessage(Stream inputStream, IMethodCallMessage reqMsg, Boolean bStrictBinding)

   at System.Runtime.Remoting.Channels.BinaryClientFormatterSink.DeserializeMessage(IMethodCallMessage mcm, ITransportHeaders headers, Stream stream)

   at System.Runtime.Remoting.Channels.BinaryClientFormatterSink.SyncProcessMessage(IMessage msg)

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 SibKernel.Server.MasterBoardManager.GetConnectedMasterBoards()

   at SibKernel.Server.JavaWrapper.MasterBoardWrap.initialize()

   at SibKernel.Server.JavaWrapper.__MasterBoardWrap.initialize0(IntPtr __envp, JniLocalHandle __obj)

at sibkernel.server.javawrapper.MasterBoardWrap.initialize(Native Method)

at sibinterface.Main.main(Main.java:30)

I have no idea why it can not find the Server.dll but not the Client.dll. 

Can anyone help here?

[Stefan Falk]

Okay I was able to solve it using fuslogvw.exe http://msdn.microsoft.com/en-us/library/e74a18c4(v=vs.71).aspx

It showed me where the java application was looking for that specific .dll file 

*** Assembly Binder Log Entry  (31.07.2013 @ 15:20:09) ***

The operation failed.

Bind result: hr = 0x80070002. The system cannot find the file specified.

Assembly manager loaded from:  C:\Windows\Microsoft.NET\Framework\v2.0.50727\mscorwks.dll

Running under executable  C:\Program Files\Java\jre7\bin\javaw.exe

--- A detailed error log follows. 

=== Pre-bind state information ===

LOG: User = EU\FalkStef

LOG: DisplayName = SibKernel.Client, Version=1.1.0.0, Culture=neutral, PublicKeyToken=null

 (Fully-specified)

LOG: Appbase = file:///C:/Program Files/Java/jre7/bin/

LOG: Initial PrivatePath = NULL

LOG: Dynamic Base = NULL

LOG: Cache Base = NULL

LOG: AppName = NULL

Calling assembly : (Unknown).

===

LOG: This bind starts in default load context.

LOG: No application configuration file found.

LOG: Using machine configuration file from C:\Windows\Microsoft.NET\Framework\v2.0.50727\config\machine.config.

LOG: Policy not being applied to reference at this time (private, custom, partial, or location-based assembly bind).

LOG: The same bind was seen before, and was failed with hr = 0x80070002.

ERR: Unrecoverable error occurred during pre-download check (hr = 0x80070002).

Copying the file to C:/Program Files/Java/jre7/bin/ solved my issue - though I don't understand why it didn't look for it in that directory I specified by proxygen.exe's build.cmd:

csc .... /reference:"C:\jni4net\jni4net-0.8.6.0-bin\bin\SibKernel.Client.dll" ...

[Laurent Cohen]

Hi Stefan,

I know I'm a bit late on this one, but I recently faced the exact same issue.
I found a solution that does not require to copy the DLL to the JRE's bin directory, as posted here: http://stackoverflow.com/a/23939713/524900

I hope this helps anyone with the same problem.

-Laurent

[Laurent Cohen]

In fact, I implemented a more elegant (I think) solution to this particular problem. I wrote code to perform a one-time initialization in a static initializer, which enumerates the assemblies known to the jni4net bridge (Bridge.KnownAssemblies) and registers them using the core APIs as follows:

namespace test {
  sealed class CustomizedBinder : SerializationBinder {
    private static bool initDone = Init();

    public override Type BindToType(string assemblyName, string typeName) {
      return Type.GetType(String.Format("{0}, {1}", typeName, assemblyName));
    }

    private static bool Init() {
      if (!initDone) {
        initDone = true;
        IList<Assembly> knownAssemblies = Bridge.KnownAssemblies;
        if (knownAssemblies != null) {
          foreach (Assembly a in knownAssemblies) {
            if (a != null) Assembly.Load(a.FullName);
          }
        }
      }
      return true;
    }
  }
}

Then, the deserialization code uses the CustomizedBinder as follows:

public object Deserialize(byte[] bytes) {
  Stream stream = new MemoryStream(bytes);
  BinaryFormatter deserializer = new BinaryFormatter();
  deserializer.Binder = new CustomizedBinder();
  object o = deserializer.Deserialize(stream);
  stream.Close();
  return o;
}

I hope this helps.

-Laurent