Ecilpse Java Builder started failing - eclipse

Question

I've been using this Eclipse installation for over a year now. All of the sudden the builder started failing. I haven't changed any settings. The only thing could have created this situation is Eclipse had a hard crash and then the builder started producing these NPE's...
!SESSION 2012-09-12 13:40:37.149 -----------------------------------------------
eclipse.buildId=M20120208-0800
java.version=1.6.0_24
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_US
Framework arguments: -product org.eclipse.epp.package.java.product
Command-line arguments: -os win32 -ws win32 -arch x86_64 -product org.eclipse.epp.package.java.product
!ENTRY org.eclipse.core.resources 4 2 2012-09-12 13:46:08.705
!MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.core.resources".
!STACK 0
java.lang.NullPointerException
at org.eclipse.jdt.internal.compiler.apt.dispatch.AnnotationDiscoveryVisitor.visit(AnnotationDiscoveryVisitor.java:61)
at org.eclipse.jdt.internal.compiler.ast.Argument.traverse(Argument.java:160)
at org.eclipse.jdt.internal.compiler.ast.TryStatement.traverse(TryStatement.java:1080)
at org.eclipse.jdt.internal.compiler.ast.Block.traverse(Block.java:112)
at org.eclipse.jdt.internal.compiler.ast.Initializer.traverse(Initializer.java:128)
at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.traverse(TypeDeclaration.java:1304)
at org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration.traverse(CompilationUnitDeclaration.java:690)
at org.eclipse.jdt.internal.compiler.apt.dispatch.RoundEnvImpl.<init>(RoundEnvImpl.java:58)
at org.eclipse.jdt.internal.compiler.apt.dispatch.BaseAnnotationProcessorManager.processAnnotations(BaseAnnotationProcessorManager.java:148)
at org.eclipse.jdt.internal.apt.pluggable.core.dispatch.IdeAnnotationProcessorManager.processAnnotations(IdeAnnotationProcessorManager.java:134)
at org.eclipse.jdt.internal.compiler.Compiler.processAnnotations(Compiler.java:813)
at org.eclipse.jdt.internal.compiler.Compiler.compile(Compiler.java:432)
at org.eclipse.jdt.internal.core.builder.AbstractImageBuilder.compile(AbstractImageBuilder.java:364)
at org.eclipse.jdt.internal.core.builder.BatchImageBuilder.compile(BatchImageBuilder.java:178)
at org.eclipse.jdt.internal.core.builder.AbstractImageBuilder.compile(AbstractImageBuilder.java:301)
at org.eclipse.jdt.internal.core.builder.BatchImageBuilder.build(BatchImageBuilder.java:60)
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:728)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:199)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:239)
at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:292)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:295)
at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:351)
at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:374)
at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:143)
at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:241)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
!ENTRY org.eclipse.core.resources 4 75 2012-09-12 13:46:09.643
!MESSAGE Errors occurred during the build.
!SUBENTRY 1 org.eclipse.jdt.core 4 75 2012-09-12 13:46:09.643
!MESSAGE Errors running builder 'Java Builder' on project 'cust_Windchill_src'.
!STACK 0
java.lang.NullPointerException
at org.eclipse.jdt.internal.compiler.apt.dispatch.AnnotationDiscoveryVisitor.visit(AnnotationDiscoveryVisitor.java:61)
at org.eclipse.jdt.internal.compiler.ast.Argument.traverse(Argument.java:160)
at org.eclipse.jdt.internal.compiler.ast.TryStatement.traverse(TryStatement.java:1080)
at org.eclipse.jdt.internal.compiler.ast.Block.traverse(Block.java:112)
at org.eclipse.jdt.internal.compiler.ast.Initializer.traverse(Initializer.java:128)
at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.traverse(TypeDeclaration.java:1304)
at org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration.traverse(CompilationUnitDeclaration.java:690)
at org.eclipse.jdt.internal.compiler.apt.dispatch.RoundEnvImpl.<init>(RoundEnvImpl.java:58)
at org.eclipse.jdt.internal.compiler.apt.dispatch.BaseAnnotationProcessorManager.processAnnotations(BaseAnnotationProcessorManager.java:148)
at org.eclipse.jdt.internal.apt.pluggable.core.dispatch.IdeAnnotationProcessorManager.processAnnotations(IdeAnnotationProcessorManager.java:134)
at org.eclipse.jdt.internal.compiler.Compiler.processAnnotations(Compiler.java:813)
at org.eclipse.jdt.internal.compiler.Compiler.compile(Compiler.java:432)
at org.eclipse.jdt.internal.core.builder.AbstractImageBuilder.compile(AbstractImageBuilder.java:364)
at org.eclipse.jdt.internal.core.builder.BatchImageBuilder.compile(BatchImageBuilder.java:178)
at org.eclipse.jdt.internal.core.builder.AbstractImageBuilder.compile(AbstractImageBuilder.java:301)
at org.eclipse.jdt.internal.core.builder.BatchImageBuilder.build(BatchImageBuilder.java:60)
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:728)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:199)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:239)
at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:292)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:295)
at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:351)
at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:374)
at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:143)
at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:241)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
Can anyone help me figure out how to get the builder working again?

Answer 1

Figured it out after hours of banging my head.
Eclipse crashed while I was in the middle of writing code. So the code that existed when I restarted Eclipse looked something like this...
public abstract class AbstractAmbassadorQueueTask implements AmbassadorQueueTask{
// BEGIN: This is where I was working when Eclipse crashed.
private static SessionListenerIfc l = new SessionListenerAdapter(){
} // <<< **Note the missing semicolon after the last brace.**
// END: This is where I was working when Eclipse crashed.
public AbstractAmbassadorQueueTask() {
super();
}
}
When I restarted Eclipse I saw all the compilation NPE's and never thought to look at the code I was working on. I would have expected Eclipse to tell me about the syntax error before recompiling the project.
I discovered the syntax error when I attempted to compile my project via the command line and outside of Eclipse.
IMHO its a bug.

Answer 2

The crash could have left your workspace in an inconsistent state, which may be resulting you in finding a corner case in the Java Builder that isn't handled correctly.
Try refreshing all of your projects and then running clean build.

Answer 3

Hi this is the problem created by heapdumps delete the temp files and restart the eclipse and build ur project again if u face the issue after 4 5 builds do the same thing