FULL PRODUCT VERSION :
java version "1.8.0_45"
Java(TM) SE Runtime Environment (build 1.8.0_45-b15)
Java HotSpot(TM) 64-Bit Server VM (build 25.45-b02, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 6.1.7601]

EXTRA RELEVANT SYSTEM CONFIGURATION :
Same as bug  JDK-8068369

Except simply use maven-compiler-plugin 3.2 (or later) and ensure you have 2 or more maven goals that result in a compile pass, for example "mvn clean install deploy".

JavaC from JDK8u45
Maven 3.3.3
maven-compiler-plugin 3.2 (or later) 
-source 1.7
-target 1.7
Use if generated sources via compiler -processor org.hibernate.jpamodelgen.JPAMetaModelEntityProcessor from  org.hibernate:hibernate-jpamodelgen:4.3.10.Final

A DESCRIPTION OF THE PROBLEM :
Using the JDK7 compiler (7u40)


		<plugins>
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-compiler-plugin</artifactId>
				<version>3.3</version>
				<configuration>
					<source>1.7</source>
					<target>1.7</target><!-- EJB 3.1 need Java 1.6 -->
					<compilerArguments>
						<!-- Ensure to use 3.6.9.Final or later hibernate-jpamodelgen, see HHH-9528 -->
<processor>org.hibernate.jpamodelgen.JPAMetaModelEntityProcessor</processor>
					</compilerArguments>
			</configuration>
			</plugin>
		<dependency>
			<groupId>org.hibernate</groupId>
			<artifactId>hibernate-jpamodelgen</artifactId>
                        <version>4.3.10.Final</version>
			<scope>provided</scope><!-- needed by test, but also during building, but never export dep -->
		</dependency>


REGRESSION.  Last worked in version 7u80

ADDITIONAL REGRESSION INFORMATION: 
JDK7 issues a complication error as:

[ERROR] /path/to/target/generated-sources/annotations/package/path/ClassName_.java:[11,17] duplicate class package.path.ClassName_

However JDK8 with -source 1.7 and -target 1.7 has a compiler error:

An exception has occurred in the compiler (1.8.0_45). 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)

.......

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
# Both install and deploy cause compile-default target to run, twice
mvn -v clean install deploy

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
COMPLICATION ERROR with useful reason description, not an IllegalStateException and compiler abort.
ACTUAL -
The compiler aborts, without issuing a proper warning/error reason.

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
See JDK-8068369 (I can only provide another after spending several hours anonymizing it and we have a workaround provides immediate fix).

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Use maven-compiler-plugin 3.1 or older  OR
Use JDK7