FULL PRODUCT VERSION :
java -version
java version "1.8.0_25"
Java(TM) SE Runtime Environment (build 1.8.0_25-b17)
Java HotSpot(TM) 64-Bit Server VM (build 25.25-b02, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Mac OS X 10.10

EXTRA RELEVANT SYSTEM CONFIGURATION :
64 bit OS X

A DESCRIPTION OF THE PROBLEM :
The following error happens 1 out of 20 times when I build my project (valjogen.41concepts.com):

An exception has occurred in the compiler (1.8.0_25). Please file a bug at the Java Developer Connection (http://java.sun.com/webapps/bugreport)  after checking the Bug Parade for duplicates. Include your program and the following diagnostic in your report.  Thank you.
java.lang.IllegalStateException: endPosTable already set
	at com.sun.tools.javac.util.DiagnosticSource.setEndPosTable(DiagnosticSource.java:136)
	at com.sun.tools.javac.util.Log.setEndPosTable(Log.java:350)
	at com.sun.tools.javac.main.JavaCompiler.parse(JavaCompiler.java:667)
	at com.sun.tools.javac.main.JavaCompiler.parseFiles(JavaCompiler.java:950)
	at com.sun.tools.javac.processing.JavacProcessingEnvironment$Round.<init>(JavacProcessingEnvironment.java:892)
	at com.sun.tools.javac.processing.JavacProcessingEnvironment$Round.next(JavacProcessingEnvironment.java:921)
	at com.sun.tools.javac.processing.JavacProcessingEnvironment.doProcessing(JavacProcessingEnvironment.java:1187)
	at com.sun.tools.javac.main.JavaCompiler.processAnnotations(JavaCompiler.java:1170)
	at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:856)
	at com.sun.tools.javac.main.Main.compile(Main.java:523)
	at com.sun.tools.javac.api.JavacTaskImpl.doCall(JavacTaskImpl.java:129)
	at com.sun.tools.javac.api.JavacTaskImpl.call(JavacTaskImpl.java:138)
	at org.codehaus.plexus.compiler.javac.JavaxToolsCompiler.compileInProcess(JavaxToolsCompiler.java:125)
	at org.codehaus.plexus.compiler.javac.JavacCompiler.performCompile(JavacCompiler.java:169)
	at org.apache.maven.plugin.compiler.AbstractCompilerMojo.execute(AbstractCompilerMojo.java:823)
	at org.apache.maven.plugin.compiler.TestCompilerMojo.execute(TestCompilerMojo.java:153)
	at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:132)
	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)
	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
	at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
	at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
	at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
	at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:120)
	at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:347)
	at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:154)
	at org.apache.maven.cli.MavenCli.execute(MavenCli.java:584)
	at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:213)
	at org.apache.maven.cli.MavenCli.main(MavenCli.java:157)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:483)
	at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
	at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
	at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
	at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)


ADDITIONAL REGRESSION INFORMATION: 
Possibly related to annotation processor api, as this happens in my annotation processor project but 1 out of maybe 10-20 times

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Checkout the open source valjogen project at "https://github.com/41concepts/VALJOGen" and build using "mvn package" multiple times. After 10-20 times it should happen. 

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
No exceptions should occur.
ACTUAL -
java.lang.IllegalStateException: endPosTable already set


ERROR MESSAGES/STACK TRACES THAT OCCUR :
none available apart from exception trace shown in description

REPRODUCIBILITY :
This bug can be reproduced occasionally.

---------- BEGIN SOURCE ----------
Full source available at "https://github.com/41concepts/VALJOGen"
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Clean and rebuild