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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 have been struggling with a very weird issue that has suddenly popped up on the latest version of Eclipse Classic (4.2.2).
Everytime I try creating or refactoring a class or subclass in any of my projects (all Java) in my Eclipse workspace I get an error at the very top of my class that says
A class file was not written. The project may be inconsistent, if so try refreshing this project and building it
Again, this happens when I create new classes. And even when I rename current classes, then undo the renaming, its totally fine, but changing a single character in the name causes this error to happen for that specific class.
I have Auto Build on, and I tried multiple times to clean and refresh every project as well as restart Eclipse entirely.
I have literally no idea how to even start figuring out how to fix this. The solutions i've found through search didn't help, so i'm hoping I might find any clues here.
I had the same problem and here's how I solved it in the end:
It turned out that the disc space on the drive where workspace resides was full.
Silly mistake but worth checking.
In my case, this was caused by the fact that the build output directories were owned by a different user, and Eclipse could not write into them.
I had the same issues, the following worked for me:
Right click eclipse then running "as an Administrator"
Click Project > Clean.
Clean your workspace by starting eclipse from the command line with the -clean argument :
eclipse -clean
See also How to run eclipse in clean mode? and what happens if we do so?
I solved this problem by running Eclipse as root.
I had the same issue on Mac OS X. I had a maven project.
Try running the following command on Terminal. This looks like an access issue.
sudo mvn clean
Provide password for admin user.
Then open Eclipse and refresh your project.
We are using Eclipse here too and have to handle a workspace with more than 200 plug-ins. Every now and then people have similar problems with their workspace and inconsistencies reported in a weird way by Eclipse.
What people here usually do is (next step only in case previous step didn't help):
- trying to ContextMenu->Team->Clean/Refresh the whole workspace
- creating a new workspace and check out all necessary files from the repository
- reinstalling Eclipse to a new directory
From my experience after using the Eclipse IDE on a daily basis for many years, it doesn't make very much sense to waste too much time with these issues, unless they aren't solved by one of the steps above. It takes too much time to struggle with these things, while starting from scratch is done in an hour or less (and usually fixes the issue).
If your Eclipse still behaves strangely it might make sense to go through your installed plug-ins. Not all external plug-ins follow the Eclipse guidelines and can seriously harm the performance and operational consistency of your Eclipse installation (E.g. Sonar Plug-in, Toad Plug-in, ...)
In my case this kind of error caused due to disk space got full and it got resolved by just freeing disk space where eclipse have been installed.
That is c/d/e drivers.
I come up with the same error, and in my case, this is because the permission of the project/bin directory is not recursively 775
I fixed it by:
Remove the project/bin directory: sudo rm -rf project/bin
Switch to Eclipse, rebuild the project: Project->Clean...
Then no errors.
Try to launch Eclipse as Administrator.
In my case such error was caused by a question mark in a quoted method name (I use geb+spock combination for automated testing).
So this method name will throw an error "Do you want something?"()
And this will not "Do you want something"()
It may not be the best response but to fix it, I've just delete the error marker.
Had the same issue. but cleaning the project and restart eclipse didn't help and disk space was not the issue. Solved the issue by copy the code to notepad(just to not lose it) and then delete the class, recreate it and paste the code back in again.
I solved it changed the owner of the project files. I changed from root(old owner) to user my current(user that i use with eclipse).
Just changed and saved java file to recompile the class. Then error disappeared.
I was try run
Project->Clean...
And Rebuild. My problem was resolved
For linux (Debia) and working on Spring boot project (maven):
$ sudo mvn clean
Then open Eclipse and File -> Refresh.
I had same issue, it is something similar but this post didn't help in my case. I have many inner classes which is causing the compiler to create class names with all inner class names together that is creating class name more than 255 character file limit on NTFS! read it in some other blog. I thought it will be helpful to post here.
Ex : classA$InnerClassB$......InncerClassZ.class in target folder it won't generate the class if it exceeds this limit. Try renaming your inner class name shortened. In my case i have to add InnerclassZ as its exceeding its not generating class and Eclipse complaining.
A class file was not written. The project may be inconsistent, if so try refreshing....
I shortened InnerClassZ to IClassZ fixed the issue.
I had the same issue and it got fixed by running eclipse in administrator mode
Eclipse Shortcut-->Right click-->More-->Run as Administrator
I've been throught that error once when I used wsdl2java to extract java classes from a wsdl, it turns out that all classes were created in the same "class", causing end classes with long names (error - File name too long). When I organized and rename some classes the error disappeared.
I had this issue. I did the following, it resolved.
Open Eclipse in Administrator mode; Right click on eclipse.exe "Run as administrator"
Clean all projects.
#Denny's answer put me on the right track, though in my case it was the target directory. I deleted it for some reason and something automatically recreated with owner root. Changing the directory owner was not enough as it contained files that were also owned by root. So make sure to really remove the complete content of the directory and to change the owner.
In my case current user didn't have access to this project dir
Before giving a try to the above solutions. Just cleaned the project and it worked.
Eclipse and playOrm was running great, I finally got Cassandra running, and the test cases were compiling (running/debugging).
In the process of getting Cassandra running, I downloaded Data_Stax, which I figured was pointless, because Cassandra was probably running all along, I was just waiting for something more to appear than the "Listening for thrifts clients" message in the dos window.
That being said, today I deleted Data_Stax, and now when recreating the Java Project: from the AntBuild, my .java methods and classes no longer appear in the "Package Explorer" view.
All the .JAR library files are populating...
And the error message reads...
Does this have something to do with removing Data_Stax?
Figured it out, forgot to run the .bat file, populating the library and files...
I've been using Eclipse a lot recently, and haven't had any problems with it. Last night, I was working on it perfectly fine. However, this morning, whenever I load it up, the program stops working half way the loading splash screen (before the actual workspace opens up). The information says "Loading Workbench" and just stays there forever. When I click on it multiple times, I get a message saying that Java(TM) Platform SE binary is not responding.
Google hasn't been a ton of help, and seems to just give a lot of responses about Minecraft. I'm slightly confused as to where I need to start looking, since nothing had changed since I successfully used it last. No updates to Java or Eclipse or anything else. Thanks for the help, and let me know if you need any more information!
I was actually able to fix it by just renaming my WorkSpace to WorkSpace1. Apparently it got corrupted somehow, and with the rename Eclipse was able to recreate a new one. Here's the link that helped me out:
http://spacetech.dk/eclipse-failed-java-was-started-but-returned-exit-code-805306369.html
Two things to check when you have problems with Eclipse:
First, always check the .log file, located in the .metadata directory (<workspace path>/.metadata/.log) of your workspace (not the Eclipse installation directory). Keep in mind that this is a hidden file under Linux or Mac OS. It usually contains the exception that is causing the crash. I usually delete any existing .log file before firing up Eclipse, just to make sure I am looking at the relevant log entries (the file will be recreated at startup).
If #1 does not help, you can try deleting the .metadata directory altogether. It will be recreated on startup (this is basically what you did by changing the workspace). In my experience with Eclipse, I noticed that some files can get corrupted inside .metadata, making Eclipse act weirdly. Keep in mind that this directory contains customizations you made in Eclipse and its plugins for the workspace and you might need to make them again.
Hope this helps.
Eclipse tends to be weird sometimes. If you move stuff around outside of the directories it was initially installed in, it usually won't load. I don't know if that's what you did, but your best bet is to back up your workspace, and reinstall eclipse. I'm sure that will do the trick.
Try a reinstall if possible or else, check the eclipse error log, which would be present at'/.metadata/.plugins/org.eclipse.ui.workbench/log'.
This will help you knowing the problem.
I am using eclipse 3.5 with google app engine + spring framework to develop application. My problem is when I change the code and build the project, the new code doesn't come in to effect. I even deleted the old file but at runtime, the old version gets display in the browser. Why?
Your description is not explicit, so following are my assumptions:
You are changing jsp/js or view related files
You have Google app engine plugin for eclipse to deploy the code
Following might be one of the reasons:
Your view files are cached in the browser, so try deleting the browser cache
Google app engine might have cached your files, so try deleting the temp folder
Eclipse IDE wouldn't have deployed your changed code, so check the timestamp, if it still shows the old timestamp, then find out how to configure eclipse to detect your changes.
I found 3 workarounds for similar issue (changes to a servlet (.java file) were not taking effect).
Before editing the .java file, stop the application. It seems that if you edit it while running, the issue occurs, even if you edit it, stop then re-start.
Delete items in Temp folder e.g, (C:\Users\username\AppData\Local\Temp), then stop and re-start the app.
I think the culprit folder in the Temp folder is this:Jetty_127_0_0_1_8888_war__.g0qk00
Right click in in the console area and select 'Remove All Terminated'. Sometimes that reveals there are other instances running, which need to be stopped by clicking the terminate button.
I got the similar issue and the problem was due to not stopping the running server.
What i was doing was running the server, editing the java file, saving and again running the server. This created two instances of the server running and when checking into the browsers the old code was executed from the first instances.
So, the solution is terminate and relaunch the server, and your new changes will be in effect.