Maven MyBatis tests fail when running Java 8 project compiled with Java 11

Question

I have a multi-module Maven project build / compiled using Java 8.

I recently just installed OpenJDK 11 in an effort to upgrade the project to Java 11. Before actually updated any components, etc. I wanted to compile my Java 8 project as Java 8 but using the Java 11 compiler.

I updated my parent pom.xml

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-compiler-plugin</artifactId>
    <version>3.8.0</version>
    <configuration>
        <release>8</release>
    </configuration>
</plugin>

I am able to compile all my sources without issue.

When I go to run my tests (mvn test), my tests succeed up until they reach my MyBatis tests at which point I get a failure:

org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.executor.ExecutorException: Error creating lazy proxy.  Cause: java.lang.NullPointerException
        at org.apache.ibatis.javassist.util.proxy.SecurityActions.setAccessible(SecurityActions.java:103)
        at org.apache.ibatis.javassist.util.proxy.DefineClassHelper.toClass3(DefineClassHelper.java:151)
        at org.apache.ibatis.javassist.util.proxy.DefineClassHelper.toClass2(DefineClassHelper.java:134)
        at org.apache.ibatis.javassist.util.proxy.DefineClassHelper.toClass(DefineClassHelper.java:95)
        at org.apache.ibatis.javassist.util.proxy.FactoryHelper.toClass(FactoryHelper.java:131)
        at org.apache.ibatis.javassist.util.proxy.ProxyFactory.createClass3(ProxyFactory.java:530)
        at org.apache.ibatis.javassist.util.proxy.ProxyFactory.createClass2(ProxyFactory.java:515)
        at org.apache.ibatis.javassist.util.proxy.ProxyFactory.createClass1(ProxyFactory.java:451)
        at org.apache.ibatis.javassist.util.proxy.ProxyFactory.createClass(ProxyFactory.java:422)
        at org.apache.ibatis.javassist.util.proxy.ProxyFactory.create(ProxyFactory.java:698)
        at org.apache.ibatis.executor.loader.javassist.JavassistProxyFactory.crateProxy(JavassistProxyFactory.java:94)
        at org.apache.ibatis.executor.loader.javassist.JavassistProxyFactory$EnhancedResultObjectProxyImpl.createProxy(JavassistProxyFactory.java:125)
        at org.apache.ibatis.executor.loader.javassist.JavassistProxyFactory.createProxy(JavassistProxyFactory.java:61)
        at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.createResultObject(DefaultResultSetHandler.java:600)
        at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.getRowValue(DefaultResultSetHandler.java:396)
        at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleRowValuesForSimpleResultMap(DefaultResultSetHandler.java:355)
        at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleRowValues(DefaultResultSetHandler.java:330)
        at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleResultSet(DefaultResultSetHandler.java:303)
        at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleResultSets(DefaultResultSetHandler.java:196)
        at org.apache.ibatis.executor.statement.PreparedStatementHandler.query(PreparedStatementHandler.java:64)
        at org.apache.ibatis.executor.statement.RoutingStatementHandler.query(RoutingStatementHandler.java:79)
        at org.apache.ibatis.executor.ReuseExecutor.doQuery(ReuseExecutor.java:60)
        at org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:326)
        at org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:156)
        at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:109)
        at org.apache.ibatis.executor.loader.ResultLoader.selectList(ResultLoader.java:81)
        at org.apache.ibatis.executor.loader.ResultLoader.loadResult(ResultLoader.java:70)
        at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.getNestedQueryMappingValue(DefaultResultSetHandler.java:772)
        at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.getPropertyMappingValue(DefaultResultSetHandler.java:464)
        at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.applyPropertyMappings(DefaultResultSetHandler.java:440)
        at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.getRowValue(DefaultResultSetHandler.java:403)
        at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleRowValuesForSimpleResultMap(DefaultResultSetHandler.java:355)
        at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleRowValues(DefaultResultSetHandler.java:330)
        at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleResultSet(DefaultResultSetHandler.java:303)
        at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleResultSets(DefaultResultSetHandler.java:196)
        at org.apache.ibatis.executor.statement.PreparedStatementHandler.query(PreparedStatementHandler.java:64)
        at org.apache.ibatis.executor.statement.RoutingStatementHandler.query(RoutingStatementHandler.java:79)
        at org.apache.ibatis.executor.ReuseExecutor.doQuery(ReuseExecutor.java:60)
        at org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:326)
        at org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:156)
        at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:109)
        at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:83)
        at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:148)
        at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:141)
        at jdk.internal.reflect.GeneratedMethodAccessor67.invoke(Unknown Source)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:566)
        at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:433)
        at com.sun.proxy.$Proxy27.selectList(Unknown Source)
        at org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:230)

My understanding was that by using the <release> tag, not only would the compiler target the specified version for byte code compatibility, but the correct JDK packages would also be used. This seems like it's doing its job to some extent because the compilation worked correctly, but the running of the tests is not.