我已经安装了jdk1.8.0_181版本，并且在携带我的应用程序时正在控制台中跟踪日志。
不是用户，为什么获取这些日志与版本问题有关？如何解决此问题。 ？
请在下面找到我的日志。
SEVERE: Servlet.service() for servlet mvc-dispatcher threw exception
java.io.IOException: invalid constant type: 15 at 142
at javassist.bytecode.ConstPool.readOne(ConstPool.java:1044)
at javassist.bytecode.ConstPool.read(ConstPool.java:984)
at javassist.bytecode.ConstPool.<init>(ConstPool.java:125)
at javassist.bytecode.ClassFile.read(ClassFile.java:770)
at javassist.bytecode.ClassFile.<init>(ClassFile.java:114)
at javassist.CtClassType.getClassFile2(CtClassType.java:191)
at javassist.compiler.MemberResolver.lookupMethod(MemberResolver.java:98)
at javassist.compiler.MemberResolver.lookupMethod(MemberResolver.java:84)
at javassist.compiler.TypeChecker.atMethodCallCore(TypeChecker.java:711)
at javassist.compiler.TypeChecker.atCallExpr(TypeChecker.java:688)
at javassist.compiler.JvstTypeChecker.atCallExpr(JvstTypeChecker.java:157)
at javassist.compiler.ast.CallExpr.accept(CallExpr.java:46)
at javassist.compiler.TypeChecker.atCastExpr(TypeChecker.java:547)
at javassist.compiler.JvstTypeChecker.atCastExpr(JvstTypeChecker.java:104)
at javassist.compiler.ast.CastExpr.accept(CastExpr.java:55)
at javassist.compiler.TypeChecker.atVariableAssign(TypeChecker.java:249)
at javassist.compiler.TypeChecker.atAssignExpr(TypeChecker.java:218)
at javassist.compiler.ast.AssignExpr.accept(AssignExpr.java:39)
at javassist.compiler.CodeGen.doTypeCheck(CodeGen.java:242)
at javassist.compiler.CodeGen.atStmnt(CodeGen.java:330)
at javassist.compiler.ast.Stmnt.accept(Stmnt.java:50)
at javassist.compiler.CodeGen.atStmnt(CodeGen.java:351)
at javassist.compiler.ast.Stmnt.accept(Stmnt.java:50)
at javassist.compiler.CodeGen.atForStmnt(CodeGen.java:480)
at javassist.compiler.CodeGen.atStmnt(CodeGen.java:359)
at javassist.compiler.ast.Stmnt.accept(Stmnt.java:50)
at javassist.compiler.CodeGen.atStmnt(CodeGen.java:351)
at javassist.compiler.ast.Stmnt.accept(Stmnt.java:50)
at javassist.compiler.CodeGen.atIfStmnt(CodeGen.java:391)
at javassist.compiler.CodeGen.atStmnt(CodeGen.java:355)
at javassist.compiler.ast.Stmnt.accept(Stmnt.java:50)
at javassist.compiler.CodeGen.atStmnt(CodeGen.java:351)
at javassist.compiler.ast.Stmnt.accept(Stmnt.java:50)
at javassist.compiler.CodeGen.atMethodBody(CodeGen.java:292)
at javassist.compiler.CodeGen.atMethodDecl(CodeGen.java:274)
at javassist.compiler.ast.MethodDecl.accept(MethodDecl.java:44)
at javassist.compiler.Javac.compileMethod(Javac.java:169)
at javassist.compiler.Javac.compile(Javac.java:95)
at javassist.CtNewMethod.make(CtNewMethod.java:74)
at javassist.CtNewMethod.make(CtNewMethod.java:45)
at ma.glasnost.orika.impl.generator.JavassistCompilerStrategy.compileClass(JavassistCompilerStrategy.java:251)
at ma.glasnost.orika.impl.generator.SourceCodeContext.compileClass(SourceCodeContext.java:249)
at ma.glasnost.orika.impl.generator.SourceCodeContext.getInstance(SourceCodeContext.java:266)
at ma.glasnost.orika.impl.generator.MapperGenerator.build(MapperGenerator.java:75)
at ma.glasnost.orika.impl.DefaultMapperFactory.buildMapper(DefaultMapperFactory.java:1360)
at ma.glasnost.orika.impl.DefaultMapperFactory.build(DefaultMapperFactory.java:1195)
at ma.glasnost.orika.impl.DefaultMapperFactory.getMapperFacade(DefaultMapperFactory.java:859)
请找到以下代码：
public void merge(Program that) {
getMapper().map(that, this); // Getting error on this line.
if (that.flatPercentageDiscount == null) this.flatPercentageDiscount = null;
}