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saxonikvm

Basic web application using Saxon API and IKVM throws exception

I created a basic .NET 4.0 application and referenced the Saxon assemblies. Here is the list of dll's I referenced in the project.

saxon9.dll saxon9api.dll IKVM.OpenJDK.ClassLibrary.dll IKVM.Runtime.dll

The code for the application is as follows: 

Sub Main()

    Console.WriteLine("Trying to instantiate SaxonProcessor...")
    Try
        Dim SaxonProcessor As Saxon.Api.Processor = New Saxon.Api.Processor()
    Catch ex As Exception
        Console.WriteLine("Error: " & ex.Message & ex.StackTrace)
        Console.Read()
    End Try

    Console.WriteLine("Saxon instantiated successfully!")
    Console.Read()

End Sub

When I run this application on our IIS machine, I get the following output:

Trying to instantiate SaxonProcessor... Saxon instantiated successfully!

I then created a basic web application project and referenced the same files as the windows application. I deployed the web application to a virtual directory that contains all the referenced assemblies. I put the following code inside my Default.aspx page:

Public Class _Default Inherits System.Web.UI.Page

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

    Response.Write("Trying to instantiate SaxonProcessor...")

    Try
        Dim SaxonProcessor As Saxon.Api.Processor = New Saxon.Api.Processor()
        Response.Write("Saxon instantiated successfully!")
    Catch ex As Exception
        Response.Write("Error: " & ex.Message & ex.StackTrace)
    End Try

End Sub

End Class

When I load the page, it gives me this exception:

Trying to instantiate SaxonProcessor...Error: The type initializer for 'IKVM.NativeCode.java.lang.Thread' threw an exception. at IKVM.NativeCode.java.lang.Class.forName0(String name, Boolean initialize, Object loader) at java.lang.Class.forName0(String , Boolean , ClassLoader ) at java.lang.Class.forName(String className) at net.sf.saxon.dotnet.DotNetExtensionFunctionFactory.class$(String x0) at net.sf.saxon.dotnet.DotNetExtensionFunctionFactory..ctor(Configuration config) at net.sf.saxon.dotnet.DotNetPlatform.initialize(Configuration config) at net.sf.saxon.Configuration.init() at net.sf.saxon.Configuration..ctor() at Saxon.Api.Processor..ctor() at BealSaxxon._Default.Page_Load(Object sender, EventArgs e) in C:\Users\u0147101\Desktop\BealSaxxon\BealSaxxon\Default.aspx.vb:line 9

FULL STACKTRACE FROM IIS MACHINE: 

System.TypeInitializationException: The type initializer for 'IKVM.NativeCode.java.lang.Thread' threw an exception. ---> System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.TypeInitializationException: The type initializer for 'java.io.BufferedInputStream' threw an exception. ---> java.lang.RuntimeException: java.lang.IllegalAccessException: Class java.util.concurrent.atomic.AtomicReferenceFieldUpdater can not access a member of class java.io.BufferedInputStream with modifiers "volatile" ---> java.lang.IllegalAccessException: Class java.util.concurrent.atomic.AtomicReferenceFieldUpdater can not access a member of class java.io.BufferedInputStream with modifiers "volatile"
   at sun.reflect.misc.ReflectUtil.ensureMemberAccess(Class currentClass, Class memberClass, Object target, Int32 modifiers)
   at java.util.concurrent.atomic.AtomicReferenceFieldUpdater.AtomicReferenceFieldUpdaterImpl..ctor(Class , Class , String )
   --- End of inner exception stack trace ---
   at java.util.concurrent.atomic.AtomicReferenceFieldUpdater.AtomicReferenceFieldUpdaterImpl..ctor(Class , Class , String )
   at java.util.concurrent.atomic.AtomicReferenceFieldUpdater.newUpdater(Class tclass, Class vclass, String fieldName)
   at java.io.BufferedInputStream..cctor()
   --- End of inner exception stack trace ---
   at java.io.BufferedInputStream.__<clinit>()
   at java.lang.System.initializeSystemClass()
   --- End of inner exception stack trace ---
   at System.RuntimeMethodHandle._InvokeMethodFast(IRuntimeMethodInfo method, Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeType typeOwner)
   at System.RuntimeMethodHandle.InvokeMethodFast(IRuntimeMethodInfo method, Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeType typeOwner)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at System.Reflection.MethodBase.Invoke(Object obj, Object[] parameters)
   at IKVM.NativeCode.java.lang.Thread..cctor()
   --- End of inner exception stack trace ---
   at IKVM.NativeCode.java.lang.Class.forName0(String name, Boolean initialize, Object loader)
   at java.lang.Class.forName(String className)
   at net.sf.saxon.dotnet.DotNetExtensionFunctionFactory.class$(String x0)
   at net.sf.saxon.dotnet.DotNetExtensionFunctionFactory..ctor(Configuration config)
   at net.sf.saxon.dotnet.DotNetPlatform.initialize(Configuration config)
   at net.sf.saxon.Configuration.init()
   at net.sf.saxon.Configuration..ctor()
   at Saxon.Api.Processor..ctor()
   at EDG.Transforms..ctor()
   at EDG.Main..ctor(NameValueCollection applicationSettings, List`1 exceptionList)
   at EDG.EGallery..ctor(NameValueCollection ConfigurationSettings, List`1 ExceptionList)

Has anyone seen this exception before? I've searched extensively on Google but nobody seems to have had this specific exception. I'm thinking it's a permissions problem with IIS, but I don't know for sure. The application pool this application is running under is setup with a machine administrator.

Solution

  • In this situation, it was a product called OpNET that was interfering with apps using the JVM. Once its services and processes were stopped, the Saxon assembly worked fine.