When checking a dll, dependency walker reports Error: A circular dependency was detected.
The documentation says
Detects circular dependency errors. This is a very rare error, but can occur with forwarded functions.
What does forwarded function mean in this context?
PS: The alternative Dependencies doesn't seem to give an error output.
Related
when i search this on google then it show that error means compile time error and exception is runtime error? but i think that it is not that so....
That is generally correct. Although the terms are colloquially interchangeable in many domains.
An Error, also known as a compile-time error, is a statement of fact. (Or NOT fact) The compiler is unable to compile the output.
Technically an error is a state in code that has raised an exception in the compiler's runtime :)
An Exception is raised at runtime and is the result of an exceptional combination of values.
Because an Exception is raised at runtime, we can generally write code to catch and handle or workaround an exception within your script or code. An Error prevents the code from being compiled and thus executed at all, so our only option is to modify the code to resolve an Error.
A compiler may perform syntax and sometimes type checking to ensure that the code follows a set of pre-determined rules and can be compiled into executable statements, but it is not until invalid values are passed into those statements that an Exception can occur, that is harder for a compiler to do and so is generally only detected at Runtime.
Some advanced or specialised compilers may perform checks against common values and as a programer you can write unit tests to try and pre-emptively detect exceptions before releasing your code.
Exceptions and Errors are the same things. Somewhere in software history, someone came up with the phrase “Exceptions are exceptional”. That sounds catchy but it doesn’t translate to Exceptions and Errors. If you go that route then who decides what is Exceptional? It is very subjective an error for one context could be exceptional to one and not to another. Exceptional and Exception are very different words. Someone apparently thought the catchy phrase enforces the idea that there is a difference.
They are the same thing. I’m not a Java developer and I realize it has different classes for each but in the .NET world they are the same thing. The preferred error handling framework in .NET is the Exception class. It doesn’t care what you want to call it, an error or an exception. Nor does it care if it is exceptional or not. It is just a vehicle for communicating error information. You can communicate the severity of an error by creating and using classes that inherit from Exception.
The Source of my information is here:
Cwalina, K., Abrams, B. F., Barton, J., Icaza, M. de, & Hejlsberg, A. (2020). Framework design guidelines: Conventions, idioms, and patterns for reusable .net libraries. Addison-Wesley.
The dropwizard manual suggests to implement a javax.ws.rs.ext.ExceptionMapper in order to have more control of the generated responses for error cases. However, it does not tell me which maven dependency to use. The central maven repository yields dozens of result pages for this class. So which artifact should I choose?
The ExceptionMapper interface should already be pulled in when you reference dropwizard-core. You shouldn't need to add any other dependencies.
dropwizard-core depends on dropwizard-jersey which depends on jersey-server which depends on jersey-common which depends on javax.ws.rs-api which has the ExceptionMapper interface.
We're using Ninject 3.0 to resolve a class.
Fairly boring standard stuff:
IKernel kernel = GetKernel();
var foo = kernel.Get<IFoo>();
However on one particular machine, we're getting an exception when constructing... something. We know what's blowing up, but it's in the logging framework (Common.Logging), and that code is used throughout our codebase, in all/most of the constructors.
Other than putting every single constructor in a try/catch and wrapping the exceptions with type info, I get no useful information from Ninject as to what it's having trouble with.
Is there some way I can get Ninject to tell us which class that it's failing to create?
Another person asks a similar question, but their solution doesn't help - we are getting the exceptions from the logging framework, not Ninject.
This isn't really a solution but when I've had problems I've manually deleted constructor dependencies one at a time until I've found the problem dependency. When I verify all works without that one dependency, I then go into that concrete implementation. I essentially recursively, from the entry point go down through each dependency, removing each dependency until the unbound dependency is identified. Tiring, but brute force hasn't failed me yet. Even when I encountered a private constructor being the cause of a problem, I'd never of gotten that without brute force. More commonly though, it's an unbound type somewhere or a conditional injection.
I have a C# application that calls a mixed mode C++ dll. I enabled dump generation via HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Windows Error Reporting\LocalDumps.
When the dll accesses invalid memory, the runtime converts the win32 exception to a managed System.AccessViolationException, and unwinds the stack before generating the dump, destroying the native stack information. I could catch the exception myself before .net gets at it and generate the dump manually, but running code on an already corrupt program could hang it, according to the msdn. So, how can I disable SEH translation?
You cannot disable that. The CLR will not unwind the stack unless you catch the exception. Make sure you don't. This needs to go through an AppDomain.UnhandledException event handler. The essential function you need is Marshal.GetExceptionPointers(), that's the one that will pinpoint the exception when you open the minidump.
You'll find resources in my answer in this MSDN forum thread and this pinvoke.net snippet, should be enough to cobble your own together.
After installing jdk 7 and switching java platform for my project in ide i get this when im trying to build project.
warning: [options] bootstrap class path not set in conjunction with -source 1.6
An annotation processor threw an uncaught exception.
Consult the following stack trace for details.
java.lang.NoSuchMethodError: com.sun.tools.javac.util.Name$Table.instance(Lcom/sun/tools/javac/util/Context;)Lcom/sun/tools/javac/util/Name$Table;
at uk.org.retep.util.javac.JavacUtils.<init>(JavacUtils.java:128)
at uk.org.retep.util.annotation.AnnotationScannerProcessor.process(AnnotationScannerProcessor.java:76)
at com.sun.tools.javac.processing.JavacProcessingEnvironment.callProcessor(JavacProcessingEnvironment.java:793)
at com.sun.tools.javac.processing.JavacProcessingEnvironment.discoverAndRunProcs(JavacProcessingEnvironment.java:722)
at com.sun.tools.javac.processing.JavacProcessingEnvironment.access$1700(JavacProcessingEnvironment.java:97)
at com.sun.tools.javac.processing.JavacProcessingEnvironment$Round.run(JavacProcessingEnvironment.java:1029)
at com.sun.tools.javac.processing.JavacProcessingEnvironment.doProcessing(JavacProcessingEnvironment.java:1163)
at com.sun.tools.javac.main.JavaCompiler.processAnnotations(JavaCompiler.java:1106)
at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:824)
at com.sun.tools.javac.main.Main.compile(Main.java:419)
at com.sun.tools.javac.main.Main.compile(Main.java:333)
at com.sun.tools.javac.main.Main.compile(Main.java:324)
at com.sun.tools.javac.Main.compile(Main.java:76)
at com.sun.tools.javac.Main.main(Main.java:61)
I know that sun switched some apis or something, but ide doesnt tell me whats wrong exactly. Thanks in advance.
You should really share your code that's causing the exception, but the exception indicates that you're using an internal Java API (any class contained in the com.sun packages). You shouldn't be using those APIs directly, as they're considered private implementations and subject to change. As those APIs are private, it isn't as simple as looking for the Javadoc to see what methods are available, but suffice it to say that the method you're calling doesn't exist. You have a few options:
If you're calling this method directly, you need to refactor. You should look for ways to accomplish the same work using public APIs.
If this happens after calling a library method, you should file a bug with the library maintainer informing them about the error and the risks of using the com.sun APIs.
If this happens after calling a public Java API (anything in the java or javax packages) then You should file a bug report with Oracle. This one seems unlikely though.
Also, if you share your code, we may be able to better help you.
[edit]
Further, see this page for more information about why you shouldn't use classes in the com.sun packages.