"Hot Code Replace Failed - add method not implemented".
I get this error message every time I change something in my test class (and save it).
Can't figure out what it means. Can somebody help?
Possibly, you have a test which is still running (in debug mode). Try finishing all tests (you can see them in the debug view: window->show view->debug) and try again...
See this thread:
This means you changed a class while it was debugging an application and it could not update the class for the application while it was running.
The error suggests you may be running an older JVM, i.e. pre-1.4.2 but this error can occur with any JVM if the change is incompatible with the previous version of the class.
Check carefully what JRE you are using in your debug session.
Also check you are deploying classes compiled with the debug attribute set. (see this thread)
Finally, as indicated here:
did you switch "Project->Build Automatically" off?
Hot code replacement works (only?) if automatic build is switched on...
I was running into this issues too. I found a build hiding in the backgound that was giving me fits. Check to make sure you have all tests/builds closed or completed. Nonetheless, you can still run the new code.
Whenever this error message appears it also gives options to terminate or restart. Select Terminate and it will terminate any running debug case which you are unable to locate.
if you have multiple projects involved, and multiple jre's installed, make sure all dependent projects are using the same javac/jre
Make sure your application server JRE and Eclipse JRE version should be same or else it will throw unsupported class version and hot code debug will not work.
I went to the same Problem,But my Debugging session ended hours ago.But still ECLIPSE error kept coming.
So I just simply restart the ECLIPSE IDE, then the problem just solved.
Related
I have a very strange problem with regards to contributing to Eclipse. I have modified bundle org.eclipse.jdt.internal.junit4.runner and just wanted to test it and try it, but for some strange reason my breakpoints in the bundle org.eclipse.jdt.internal.junit4.runner are not working. It sounds to me that there is an internal filtering that cause that these bundles are ignored for breakpoint.
Funny thing is when I add
System.err.println("Did you reach it?"); //$NON-NLS-1$
In the console I can see the text, but the breakpoint is not working...
Any advice would be very welcome.
Look here. Also check whether any packages are excluded in Windows->Preferences->Java->Debug->Step filtering.
Well, I found out the problem but not a complete answer.
The problem is especially related to the org.eclipse.jdt.internal.junit4.runner bundle which launches and an another virtual machine and the code within this VM is not in debug mode, e.g. the first virtual machine is in debug mode and the second is not and that was the reason why my breakpoints did not work. So I guess there is no possibility how to enable debug mode "by eclipse automatically" in the subsequent VMs.
Here is an example of 2 VM from my blog http://blog.chocolatejar.eu/contribution/2014/02/27/better-visualization-junit-failures/
I have recently started developing an Eclipse plugin (which is basic stuff for now) and I am struggling with "default" way to run Eclipse plugin ("Run as Eclipse application").
The Eclipse is starting another instance with my plugin already installed in it (this is default behaviour).
The problem is that when I want to re-run my plugin project and I press "run" button again (or Ctrl + F11) (and the another Eclipse instance still running) I get following message:
"Could not launch the application because the associated workspace is currently in use by another Eclipse application".
The error makes sense, and when I close "testing" Eclipse instance I am able to run my plugin again.
The question is - "is it normal routine for plugin development?". Maybe I am missing something, e.g. special arguments for Eclipse?
This seems all pretty normal. The error message is since the run configuration is specifing a workspace and when you start a second instance using the same workspace it is locked and considered in use.
What I usually do when testing a plugin is to create a run configuration (click "Run...") where I disable all the plugins I wont need when testing. This makes sure that the test starts up a couple of seconds quicker. Make sure you save that run configuration as a *.launch file aswell, that makes it quicker to test the next time. Or it can be used to share the configuration.
There's a lot you can configure in the run configuration, such as eclipse arguments, vm argument, if you want environment variables set, etc. So be sure to experiment a little.
In your run configuration. Main tab->Workspace Data ->Location text box add this:
${workspace_loc}/../runtime-EclipseApplication${current_date:yyyyMMdd_HHmmss}
Note the suffix ${current_date:yyyyMMdd_HHmmss} by this every time you launch your application new workspace will be created. So you will not get any error message saying workspace is locked.
But be careful as the folder .metadata will be different for different instances as their work-spaces are different. Thus preferences stored/retrieved by different instances are NOT in sync.
You are probably missing one important point: Eclipse supports the Java hot code replacement. Therefore in many cases you can modify your Java code while your application Eclipse instance is running, save the code and continue without restarting.
If hot code replacement is not possible, Eclipse will tell you, so you always know whether the editing changes are applied to the running instance.
This works best with more recent versions of the JVM, so consider upgrading to the latest Java 7 version, even if you write code to be compliant with Java 1.5 or 6.
I've just connected to a machine I never worked on, and tried to run Eclipse there. Unfortunately, I got the error:
Eclipse:
JVM terminated. Exit code=14
(my configuration details here)
I guess there's either a problem with my configuration or with that machine's setup, but Exit code=14 does not give me a lot of information to go on. What does that mean? Where should I start?
I intentionally omitted my configuration details because I'm looking for a general explanation of that exit code, not a specific fix for my configuration.
It could be related to bug 9027: Workbench should check JDK version on startup
You could have an incompatible (ie too old) JVM: the code 14 has been referenced in this comment as:
The main launcher detects the JVM terminates with exit code 14. Is the
following message sufficient?
Please use a newer VM. Eclipse requires at least 1.3.1.
It can also be related with an incompatibility between what is installed on the system and what Eclipse needs when launching: see for instance this example.
Just to add to #VonC's answer, the Eclipse source code has this to say:
// Check to see if we are running with a compatible VM.
// If not, then return exit code "14" which will be recognized
// by the executable and an appropriate message will be displayed
// to the user.
if (!isCompatible())
System.exit(14);
(Source: http://svn.netlabs.org/repos/swt/trunk/src/plugins/org.eclipse.platform/src/org/eclipse/core/launcher/Main.java)
So I suggest checking whether you have a compatible JVM.
I've got a Android AppEngine Connected Project I'm trying to build using GWT2.4 RequestFactory and Objectify on my Eclipse IDE.
Apparently I need to run the RequestFactory Validation Tool because I'm using ServiceName and ProxyForName annotations (these are required especially when working on the Android client side). My problem is the Eclipse can't validate it and the solution provided at http://code.google.com/p/google-web-toolkit/wiki/RequestFactoryInterfaceValidation#IDE_configuration is enough to make me rip my eyes out.
Since I'm working on a Windows machine, the shell script provided is not very useful. Trying to run Validation Tool from a cmd propt returns the error message:"This tool must be run with a JDK, not a JRE"
Can someone explain how this Tool is supposed to be run? Is there a way to use it as an External Tool in eclipse?
Normally if you follow carefully the instructions in the link you show, and run the GWT Development Mode from Eclipse, the Validation should be done automatically at the time you access the development URL with your browser.
For the record, I've actually had some problems with it, but launching the application several times maked it work.
Well, I ran into the same problem as well. When I tried annotation processing (under Java Compiler-> Annotation processing )was being disabled. So RequestFactoryDeobfuscatorBuilder was not being generated. Try enabling that and rebuilding your project.
I've just recovered from two days of hunting this bug down in a project that used to run validation properly but stopped.
In my case I had a new-ish generic BaseRequestContext and a specific sub-interface that extended it. My parent interface declared a method that didn't match the Locator's exactly (e.g. getThing(T) vs get(T)) and this wasn't reported as an error but did stop the validation tool from completing.
Apt is also removed in Java 8 : http://openjdk.java.net/jeps/117 . So beware.
Switching back to Java 7 will fix the issue if you are using Java 8.
I understood why the error happens sometimes in a project: the compiler was complaining it cannot find the directory .apt . But when I tried to create it manually it was not possible (under windows). I think the validation tool mutes the exception of not being able to create the directory: try renaming .apt in your validation tool calls (do a text search in your project)
I've been using Eclipse for ages and I use the debugger all the time but recently I've known it to skip over breakpoints while debugging! I've even had it so that I've set a break point on a println I'll see the text come out but not hit the breakpoint. Also sometimes I'll hit a break point consistently in one area of the code but not in others. This never used to happen and I can't work out what I've done to my system to cause this. Has anyone else had any experience of the problem?
What you mention ("-XX:+UseParallelGC") is a workaround for the bug found with jdk6u14 and 15.
As mentionned in "Eclipse SWING app: breakpoint hit only after an uncaught exception is thrown", it is fixed with jdk6u16.
Ahaha,
I've found the solution eventually after a long web trawl. I'm not sure why this happens but other people have seen the problem too and
Window -> Preferences -> Java -> Installed JRE's -> (edit your currently used JRE) -> Edit "Default VM Arguments" box and enter (w/o questionmarks) "-XX:+UseParallelGC"
Generally fixes the problem...
I encountered the same issue. My solution is, you do a clean on the project (Project->Clean) and build again(Project->Build All or Project->Build Project). Upon a successful build, Debug the project again. It will go through the code perfectly (in the proper way).