Question

I’m working on an Android App using the Android SDK for Eclipse as well as the Egit plug in for github.
Recently I’ve encountered an error while trying to build the project after attempting to merge with the (remote) master. I have this error listed in the Problems window:

The project was not built due to "Error updating cache during move/delete.
The resource cannot be moved, renamed or deleted due to an internal error."

In my Error Log I also have from a previous Project > Clean:

JavaBuilder handling ImageBuilderInternalException while building: Project
org.eclipse.core.internal.resources.ResourceException: Problems encountered while deleting resources.
    at org.eclipse.core.internal.resources.Resource.delete(Resource.java:737)
    at org.eclipse.jdt.internal.core.builder.BatchImageBuilder.cleanOutputFolders(BatchImageBuilder.java:114)
    at org.eclipse.jdt.internal.core.builder.BatchImageBuilder.build(BatchImageBuilder.java:46)
    at org.eclipse.jdt.internal.core.builder.JavaBuilder.buildAll(JavaBuilder.java:254)
    at org.eclipse.jdt.internal.core.builder.JavaBuilder.build(JavaBuilder.java:173)
    at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:627)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:170)
    at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:201)
    at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:253)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:256)
    at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:309)
    at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:341)
    at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:140)
    at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:238)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)
Contains: Error updating cache during move/delete.
The resource cannot be moved, renamed or deleted due to an internal error.
java.io.IOException: Cannot lock C:\Users\Jessbro\Project\.git\index
    at org.eclipse.jgit.dircache.DirCache.lock(DirCache.java:187)
    at org.eclipse.jgit.lib.Repository.lockDirCache(Repository.java:932)
    at org.eclipse.egit.core.GitMoveDeleteHook.deleteFile(GitMoveDeleteHook.java:58)
    at org.eclipse.team.internal.core.MoveDeleteManager.deleteFile(MoveDeleteManager.java:50)
    at org.eclipse.core.internal.resources.Resource.unprotectedDelete(Resource.java:1763)
    at org.eclipse.core.internal.resources.Resource.delete(Resource.java:724)
    at org.eclipse.jdt.internal.core.builder.BatchImageBuilder.cleanOutputFolders(BatchImageBuilder.java:114)
    at org.eclipse.jdt.internal.core.builder.BatchImageBuilder.build(BatchImageBuilder.java:46)
    at org.eclipse.jdt.internal.core.builder.JavaBuilder.buildAll(JavaBuilder.java:254)
    at org.eclipse.jdt.internal.core.builder.JavaBuilder.build(JavaBuilder.java:173)
    at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:627)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:170)
    at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:201)
    at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:253)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:256)
    at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:309)
    at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:341)
    at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:140)
    at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:238)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)

and:

JavaBuilder handling CoreException while cleaning: Project
org.eclipse.core.internal.resources.ResourceException: Problems encountered while deleting resources.
    at org.eclipse.core.internal.resources.Resource.delete(Resource.java:737)
    at org.eclipse.jdt.internal.core.builder.BatchImageBuilder.cleanOutputFolders(BatchImageBuilder.java:114)
    at org.eclipse.jdt.internal.core.builder.JavaBuilder.clean(JavaBuilder.java:291)
    at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:629)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:170)
    at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:201)
    at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:253)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:256)
    at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:218)
    at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:360)
    at org.eclipse.core.internal.resources.Project$1.run(Project.java:523)
    at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:1800)
    at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:1782)
    at org.eclipse.core.internal.resources.Project.internalBuild(Project.java:502)
    at org.eclipse.core.internal.resources.Project.build(Project.java:94)
    at org.eclipse.ui.internal.ide.dialogs.CleanDialog.doClean(CleanDialog.java:312)
    at org.eclipse.ui.internal.ide.dialogs.CleanDialog$1.runInWorkspace(CleanDialog.java:154)
    at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:38)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)
Contains: Error updating cache during move/delete.
The resource cannot be moved, renamed or deleted due to an internal error.
java.io.IOException: Cannot lock C:\Users\Jessbro\Project\.git\index
    at org.eclipse.jgit.dircache.DirCache.lock(DirCache.java:187)
    at org.eclipse.jgit.lib.Repository.lockDirCache(Repository.java:932)
    at org.eclipse.egit.core.GitMoveDeleteHook.deleteFile(GitMoveDeleteHook.java:58)
    at org.eclipse.team.internal.core.MoveDeleteManager.deleteFile(MoveDeleteManager.java:50)
    at org.eclipse.core.internal.resources.Resource.unprotectedDelete(Resource.java:1763)
    at org.eclipse.core.internal.resources.Resource.delete(Resource.java:724)
    at org.eclipse.jdt.internal.core.builder.BatchImageBuilder.cleanOutputFolders(BatchImageBuilder.java:114)
    at org.eclipse.jdt.internal.core.builder.JavaBuilder.clean(JavaBuilder.java:291)
    at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:629)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:170)
    at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:201)
    at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:253)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:256)
    at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:218)
    at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:360)
    at org.eclipse.core.internal.resources.Project$1.run(Project.java:523)
    at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:1800)
    at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:1782)
    at org.eclipse.core.internal.resources.Project.internalBuild(Project.java:502)
    at org.eclipse.core.internal.resources.Project.build(Project.java:94)
    at org.eclipse.ui.internal.ide.dialogs.CleanDialog.doClean(CleanDialog.java:312)
    at org.eclipse.ui.internal.ide.dialogs.CleanDialog$1.runInWorkspace(CleanDialog.java:154)
    at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:38)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)

I’ve tried searching for some possible solutions but haven’t been able to find anything of use.
I came across this problem after seeing an error marker next to my project name but had no markers for any of my classes.
I first searched possible solutions to that problem and most of them explained to do a Project > Clean which is when my build errors showed up in the log.
Thanks.

Answer 1

In such a case, I would switch to a command line interface, and check:

• git status within the project
• make sure the merge has been completed (check if there isn’t some merge conflicts)
• clone the repo in a new directory
• import said project in a new workspace, to see if it can be rebuild there.

That is more a workaround than an explanation of what is actually going for your issue, but at least that would allow to move on.