I have a project I checked out with svn at work. It has the following associated with it in Package Explorer view of Eclipse:
project[trunk]
project-adhoctest[trunk/adhoctest]
project-jar[trunk/gazelle]
project-war[trunk/webapp]
Now I have a file in the project jar directory that I have put a breakpoint in. What is weird is that when debugger is launched, it always goes to the project[trunk]. This is really bad because I need to debug changes I make, not the trunk I checked out, but in project-jar.
The only other details is that I used maven to build dependencies when I imported this project. But, to make sure I did that right, I deleted everything and checked out this project again. Still same problem. I goggled quite a bit and asked others at work what could be going wrong, but haven't found a fix yet.
I use Eclipse Juno, 4.2.2
Thanks,
GeekyOmega
The problem is the build path was wrong, for me. It was looking at the entire workplace and choosing the trunk. When I re-installed eclipse, when I first ran debug, it asked me for the build path. I pointed the build path to the project folder project-jar instead. This fixed the issue for me.
You must go to run-->debug configuration and add the branch project in the Source tab
When compiling my Java project, I get this error in Other errors:
Description Resource Path Location Type
The project was not built since the source file /PROJECT/src/main/org/../ABC.java could not be read PROJECT Unknown Java Problem
Indeed, the file is listed in Package Explorer but shows only "Error retrieving content description. On the file system, the silent dir exists but not the file; git status is missing nothing. How do I resolve that compile error?
Simply restart eclipse, refresh all projects and do a clean build. That should fix it. Don't forget the eclipse restart, else no matter how many times you do a clean build or refresh, it will not fix the problem
Looks like someone has deleted that file but eclipse still think that file is part of the project. Might have happened when someone deleted a file from the source control in an improper way.
If you dont have pending changes then you can get fresh copy of the project and import it into your workspace.
If you have pending changes then take a copy of changes and repeat above step. ( A restart of eclipse may be necessary)
It can be related to missing location
Select File => properties => Resource => Edit file location.
I know the answer is accepted but in my case that solution didn't work for me, I had restored files from a backup to my local project in linux and the files I restored were owned by root with only the owner being able to read/write the files. SO, I sudo chowned the files "sudo chown _R myUser:myUser *" at the base of my project, refreshed in Eclipse (f5) and the annoying repeated failure of my build was a thing of the past.
If you are writing Maven projects, try right click on the project and select [Maven] -> [Update Project...]
It works for me.
For me there was a different solution than mentioned here.
I was doing a no-no, I imported a project that had a .project file, and there was some errors in the way my version of eclipse was reading some of the files. The package names and files had a little ! symbol with a yellow background.
The solution was to delete the packages. Obviously make a backup. But in doing this most times the files nor the packages were deleted. Instead eclipse refreshed and the desired files were there. Sometimes I had to hit refresh (F5), and sometimes I had to restore files.
I found it best to delete the packages as that is where eclipse was having reading the data.
If the missing file is still mentioned in the Linked Resources, no refresh and restart of Eclipse will ever solve the problem. You have to delete the file in the Project Properties Linked Resources list.
For anyone using VS Code with the RedHat Java plugins (which use Eclipse tooling under the hood), I got this error as well. I fixed with the following:
# Quit VS Code
rm -rf ~/Library/Application\ Support/Code/User/workspaceStorage/*
# Reopen VS Code
As all others said, it is most probably an issue with the internal caches of Eclipse.
I usually restart the IDE with the additional -clean option to wipe out the OSGi-related caches, then clean and rebuild all the projects.
If the problem persists, I realized that cleaning up the single affecting project works better that cleaning up the whole workspace. (Ominous... XD)
This usually happens to me when merging changes that imply renaming or deletion of source files, prior to launching Eclipse.
I'm a Visual Studio .NET developer who's trying to switch to Eclipse/SpringSource Tool Suite, so I get stuck on probably simple problems. Please bear with me.
I'm working on a Spring MVC project associated with an Apache Tomcat server. If I right-click the server and choose Start (alternatively Package Explorer->right-click project->Run As->Run on Server), my project is compiled and started. Compiler output is shown in Console window. Fine.
But if I simply want to compile the project without running it, I try selecting Project->Build All, Project->Build Project, or Project->Build Working Set. Nothing happens, no screen output, nothing -- despite having non-compiling code.
I expected to see the compiler errors on screen, preferably with the errors highlighted in the code. For what it's worth, I have deselected Project->Build Automatically. Anybody knows what I should do?
Eclipse and STS use incremental compilation. So, every time a file is saved, it is automatically compiled (as well as all files dependent on it). When you deselect Build Automatically, then yes, you will need to explicitly build, but this will still be an incremental build (ie- only the changed files and dependencies).
See here for a bit of a discussion on how incremental building works in Eclipse: http://www.eclipse.org/articles/Article-Builders/builders.html
I am using eclipse 3.4.1 Java EE under Vista. It seems to like getting stuck when building my workspace. Canceling the build doesn't seem to do anything as well.
Why is this happening and how do I fix the problem?
I was able to fix this with the following:
First, exit Eclipse. Then temporarily move the following .projects folder to a safe location:
mv .metadata\.plugins\org.eclipse.core.resources\.projects projects
Start and exit Eclipse, then move the .projects folder back to where it was originally:
mv projects .metadata\.plugins\org.eclipse.core.resources\.projects
Use at your own risk, of course.
Some time it's very helpful to execute eclipse from command line with "-clean" parameter to enforce it produce clean up for workspace.
eclipse -clean did not work but following did
eclipse -clean -clearPersistedState
Eclipse often freezes for me at 44% if I'm debugging Android over USB.
When disconnecting the device, Eclipse starts.
The accepted answer allowed me to get Eclipse started again, but it seems that the projects lost their metadata. (E.g., all the Git/Gradle/Spring icons disappeared from the project names.) I have a lot of projects in there, and I didn't want to have to import them all over again.
So here's what worked for me under Kepler. YMMV but I wanted to record this just in case it helps somebody.
Step 1. Temporarily move the .projects file out of the way:
$ cd .metadata/.plugins/org.eclipse.core.resources
$ mv .projects .projects.bak
Step 2. Then start Eclipse. The metadata will be missing, but at least Eclipse starts without getting stuck.
Step 3. Close Eclipse.
Step 4. Revert the .projects.bak file to its original name:
$ mv .projects.bak .projects
Step 5. Restart Eclipse. It may build some stuff, but this time it should get through. (At least it did for me.)
Step1:
Open project directory and edit .project file, remove following lines to disable java script validation.
<buildCommand>
<name>org.eclipse.wst.jsdt.core.javascriptValidator</name>
<arguments>
</arguments>
</buildCommand>
Save file.
Step 2:
Go to Eclipse installed directory and open eclipse.ini(or sts.in if you have STS), change xms and xmx value based on your RAM size of your computer.
-Xms512m
-Xmx1024m
-XX:MaxPermSize=256m
OR: in windows, go to eclipse shortcut in desktop, right click->properties-> add following:
C:\software\eclipse\sts-3.6.2.RELEASE\STS.exe -clean -Xms512m -Xmx1024m
Run Eclipse.
Go to Eclipse->windows->preference->Validation, enable Suspend all validators. Do this if you don't want do any validation listed in the list given in Validator panel.
I have this problem whe I have too much maven projects open at once. What I tend to do is:
Restart eclipse (sometimes I need to kill eclipse)
Disable automatic build immediatly (project > uncheck Build automatically)
Right click the project(s) I want to have rebuild
Close unrelated projects
Re-enable automatic build
This enables a functioning rebuild in 99% off the cases in my workspace.
You may want to take a look at How to report a deadlock. You may also want to check the Error view and/or the error log ([workspace]/.metadata/.log). If that doesn't help, you'll probably need to include more info about which plugins you have installed and which projects you have. Can you create a minimal workspace which reproduces the problem?
I faced Similar issue in Eclipse Indigo. I changed the HeapSize it started working correctly. I just added following eclipse.ini file
-vmargs
-Xms1024m
-Xmx1024m
It worked fine after increasing the VM size
The only solution for me (Luna 4.4.1) was this:
Go to Project Properties > Builders and then uncheck the Javascript Validator.
I had same issue with my Eclipse and as a solution, I created new project, copied all resources manually (using windows copy/paste) to new project, deleted old project and that's it.
Sometimes, this happens due to improper System shutdown and Eclipse workspace started facing similar issues.
Hope it will work.
Unselect automatic build using Eclipse-> Windows->Preferences helps fixing this issue.
Deleting some of the JDT indexes (in .metadata.plugins\org.eclipse.jdt.core), particularly the big files, often fix or ease the problem for me.
I just had the same problem.
By using Task Manager to kill the build process and exiting Eclipse with no projects open, I was able to get back into Eclipse and clean the project without opening it. I then restarted Eclipse again,loaded my project and all OK.
I've found that this might also happen if you rebuild a workspace with a project containing a lot of image data (such as a dedicated images project). Might be best to put something like that into its own workspace and handle it separately to the rest of the projects you deal with.
If you can't, then don't clean that project when you clean and rebuild. Only rebuild when necessary.
In my case problem arise after importing downloaded project - stuck at 80% build. Solved by adding write permissions for group to project's files (Ubuntu 12.04).
In my case it helped to remove the source folders from my favorites in the Windows Explorer (Windows 8.0). It seems that the build was not actually stuck, but triggered in some kind of infinite loop (as mentioned here - Bug 342931).
Sometimes the problem seems to be fixed by killing other programs which have files open from the project folder.
Looking at the logs in [workspace]/.metadata/.log provided useful information for me.
Turned out there was a java.lang.OutOfMemoryError: PermGen space error when the workspace build would hang.
This can be edited in the eclipse.ini or sts.ini(If you are using SpringSource Tool Suite) file.
I faced the same problem when I tried to install Angular.js with bower in my project. I seems bower has lots of javascript files it downloaded automatically which caused my IDE to stuck in validation process for a long time. So, I solved this problem this way,
I first installed tern.js 0.9.0.
Then I went to the project properties, selected tern script path
included only the path I needed for validation, My project's
javascript folder. I excluded other path like placeholders,
Angular.js files, Jquery files.
I selected the Javascript from the properties again and did the same
things in include path's source.
My IDE currently working without freezing. I took help from there. Tern
I guess it can be helpful, where any IDE stuck due to lots of Javascript file.
I tried lots of these suggestions, but the only thing that finally worked for me was creating a new workspace, and freshly checking out all my projects into that folder. Then it worked fine ;-)
I just restarted eclipse and it started working the next time.
Refresh all the projects u want to build.
Worked
Restart eclipse.
It worked for me several times.
I was able to solve this by removing extra folder that Eclipse had created in my eclipse installation folder. I didn't install and I was using Eclilpse Neon 3 with Spring Tool suite also installed. But, when I looked into extracted eclipse installation, I had C: folder which had some folder structure. It was mirror image of my Downloads folder. I removed it and restarted.
It worked for me!
None of the the answers here worked for me. What worked was to delete the following folder
C:\Users\your username\workspace\project
name.metadata.plugins\org.eclipse.core.resources.projects\project
name\.indexes
Rather than debug and find the exact root cause(s) for this, I just deleted the projects and the metadata folder. Eclipse will rebuild the .metadata file the next time it's launched.
I then pulled in the latest project code and the problem was solved. It was more work as I had to reconfigure everything, including my servers, but build workspace had been stopping at 50% for anywhere from 3 to 5 minutes before it would completely finish, so it was worth the effort.
Also, I've found that with Eclipse, if you stop the build workspace before it completes and shut down Eclipse if that hangs up everything, you can really mess up your configuration and waste lots of time trying to get it stable again. I'm using Eclipse Oxygen, but I've had this happen in all the versions of Eclipse I've used, so I really try to avoid it, if possible.
Inside the project folder open .project file. There is a bad entry and it might help
<buildCommand>
<name>org.eclipse.m2e.core.maven2Builder</name>
<arguments>
</arguments>
</buildCommand>
If you are using Maven as a build tool you might want to:
Close eclipse
Delete dependency directories located in .m2/repository/ - in
Linux
it's located under Home directory and in Windows it should be in c:\Users<YourUsername>.m2 (replace '' with your
username)
Start Eclipse and enjoy normal work :)
That helped me resolve this issue and I hope it helps you too. :)
Cheers!
P.S. I've edited my answer (as #howlger asked) where it was also suggested to delete .eclipse and .p2 folders as it can do harm (although it did NOT in my case + I had to reinstall some of plugins I'm using).
In case there is a problem on start when building your project disable the build automatically from menu. Project -> Build Automatically. This solved my problem while more sophisticated solutions could not.