How can I deal with the persistent Eclipse problem hanging in my workspace?

Question

Here is long and short. First, briefly:

• I had a crash in the X Window System, as a result of which Eclipse existed uncleanly (i.e. it was probably killed without warning.)
• When you restart eclipse, it will hang endlessly on the "Download Workbench".
• Deleting * .snap files in the workspace. metadata works, but after that, the IDE does not work properly after lunch, apparently because these files are missing.
• Removing my workspace. metadata allows you to run eclipse and work mostly fine, but ...
• When I try to save a Java file (any file), it hangs endlessly on "User Operation is Waiting" - "Building workspace"

So the bottom line is that somewhere after the crash there is a file or files that make Eclipse freeze when trying to restore the files that I edited, or in another way with my workspace. Here are some important exceptions to my .log file:

From paragraph number 2:

!ENTRY org.eclipse.core.resources 2 10035 2011-01-24 11:21:33.870
!MESSAGE The workspace exited with unsaved changes in the previous session; refreshing workspace to recover changes.

!ENTRY org.eclipse.core.resources 8 2 2011-01-24 11:21:35.040
!MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.core.resources".
!STACK 1
org.eclipse.core.runtime.CoreException: SDK is not loaded yet
        at com.android.ide.eclipse.adt.internal.build.builders.BaseBuilder.stopBuild(Unknown Source)
        at com.android.ide.eclipse.adt.internal.build.builders.BaseBuilder.abortOnBadSetup(Unknown Source)
        at com.android.ide.eclipse.adt.internal.build.builders.ResourceManagerBuilder.build(Unknown Source)
        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)

From paragraph No. 5:

!ENTRY org.eclipse.core.resources 8 2 2011-01-24 14:14:47.331
!MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.core.resources".
!STACK 1
org.eclipse.core.runtime.CoreException: Project target not loaded yet.
        at com.android.ide.eclipse.adt.internal.build.builders.BaseBuilder.stopBuild(Unknown Source)
        at com.android.ide.eclipse.adt.internal.build.builders.BaseBuilder.abortOnBadSetup(Unknown Source)
        at com.android.ide.eclipse.adt.internal.build.builders.PreCompilerBuilder.build(Unknown Source)
        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)
!SUBENTRY 1 com.android.ide.eclipse.adt 8 0 2011-01-24 14:14:47.331
!MESSAGE Project target not loaded yet.
!SUBENTRY 1 com.android.ide.eclipse.adt 8 0 2011-01-24 14:14:47.331
!MESSAGE Project target not loaded yet.

At this point, I really want to be able to use Eclipse in a state where it is not crashing. Any tips that don't completely remove my ~ / .eclipse directory, my workspace, and reinstall Eclipse from scratch?

Answer 1

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Answer 2

.snap < > /. metadata/.plugins/org.eclipse.core.resources/

Answer 3

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Answer 4

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Answer 5

, .lock workspace/.metadata. .

Answer 6

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Answer 7

: https://bugs.eclipse.org/bugs/show_bug.cgi?id=310625