'Building workspace' has encountered an error

Question

Eclipse Luna 4.4.0

Error occurred during the Build

Error instantiating builder 'ord.eclipse.m2e.core.maven2Builder'.
Plug-in org.eclipse.m2e.core was unable to load class org.eclipse.m2e.core.internal.builder.MavenBuilder
An error occurred while automatically activating bundle org.eclipse.m2e.core (547).
Plug-in org.eclipse.m2e.core was unable to load class org.eclipse.m2e.core.internal.builder.MavenBuilder.
An error occurred while automatically activating bundle org.eclipse.m2e.core (547).
Error instantiating builder 'org.eclipse.m2e.core.maven2Builder'.
Plug-in org.eclipse.m2e.core was unable to load class org.eclipse.m2e.core.internal.builder.MavenBuilder.
An error occurred while automatically activating bundle org.eclipse.m23.core (547).
Plug-in org.eclipse.m2e.core was unable to load class org.eclipse.m2e.core.internal.builder.MavenBuilder.
an error occurred while automatically activating bundle org.eclipse.m2e.core (547).

if i delete the folder .metadata and all .project and .setting data from my workspace, i get no error. After one day of work i´ll get the same error.

Solution 1

Try next steps:

1. Go to your eclipse installation folder
2. Run "eclipse.exe -clean"
3. Work normally
4. Enjoy

Solution 2

I ran into this same issue and I believe the culprit to be the Sonarqube plugin I had installed.

This discussion pointed me in that direction:

http://forum.spring.io/forum/spring-projects/springsource-tool-suite/749864-sts-ggts-3-6-0-m1-released

Uninstalled the Sonarqube plugin and the error is gone.

Solution 3

I uninstalled my Netbeans because Eclipse and Netbeans are both usin the same workspace.

i uninstalled Netbeans and the error is gone.

Solution 4

In my case, the problem resulted to be my Eclipse was running on an outdated IBM Java Virtual Machine. I updated my IBM JRE, I modified my eclipse.ini in order to update the -vm parameter so it points to the new installation, and it solved the problem.

Solution 5

I keep my Workspace on Dropbox. I had this issue occur, and managed to solve it by searching within [workspace]/.metadata/ for the word 'conflicted' and deleting all these files Dropbox had created. Error was gone when I restarted Eclipse.

View more solutions

Comments

[jordanpg]

Same issue. Installing the SonarQube plugin brought eclipse to its knees. Will file bug report with SQ soon.

[gp.]

I had changed jdk version in eclipse.ini. clean launch fixed the issue.

[simpleusr]

This also worked for me too. Thanks!!! PS: I got this error after updating m2e plugin in. There was another eclipse instance running during the update. I think this was the problem...

[Satya]

Running -clean worked for me. On Mac this command is '/Applications/eclipse\ 3/Eclipse.app/Contents/MacOS/eclipse -clean'

[miloxe]

-clean helped Luna 4.4.1

[Pawel]

Also helped on Mars

[TheBat]

Worked for Neon.1

[Benny]

I am using Neon 1, but i got this issue only on 1 project from github the error is: Errors occurred during the build. Errors running builder 'Android Package Builder' on project 'ProjectName'. Could not initialize class com.android.tools.lint.checks.BuiltinIssueRegistry

[Joaquín L. Robles]

Didn't work for me, instead I changed the -vm argument in eclipse.ini and it did the trick

[Stephen Kennedy]

Excellent thanks!