eclipse stuck when building workspace

Question

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.

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?