Spring Boot升级至2.5.14后遇QuerySyntaxException实体未映射问题

将Spring Boot从2.3.4.RELEASE版本升级至2.5.14版本后，应用触发QuerySyntaxException: *** is not mapped异常，目前已发现多个实体出现该问题，以下是异常示例：

java.lang.IllegalArgumentException: org.hibernate.hql.internal.ast.QuerySyntaxException: ModelSummary is not mapped [from ModelSummary where :currentTime - lastUpdateTime <= :timeFrame]
        at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:138) ~[hibernate-core-5.4.33.jar:5.4.33]
        at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:181) ~[hibernate-core-5.4.33.jar:5.4.33]
        at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:188) ~[hibernate-core-5.4.33.jar:5.4.33]
        at org.hibernate.internal.AbstractSharedSessionContract.createQuery(AbstractSharedSessionContract.java:734) ~[hibernate-core-5.4.33.jar:5.4.33]
        at org.hibernate.internal.AbstractSharedSessionContract.createQuery(AbstractSharedSessionContract.java:114) ~[hibernate-core-5.4.33.jar:5.4.33]
        at jdk.internal.reflect.GeneratedMethodAccessor138.invoke(Unknown Source) ~[?:?]
        at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?]
        at java.lang.reflect.Method.invoke(Method.java:566) ~[?:?]
.......................................
Caused by: org.hibernate.hql.internal.ast.QuerySyntaxException: ModelSummary is not mapped [from ModelSummary where :currentTime - lastUpdateTime <= :timeFrame]
        at org.hibernate.hql.internal.ast.QuerySyntaxException.generateQueryException(QuerySyntaxException.java:79) ~[hibernate-core-5.4.33.jar:5.4.33]
        at org.hibernate.QueryException.wrapWithQueryString(QueryException.java:103) ~[hibernate-core-5.4.33.jar:5.4.33]
        at org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:220) ~[hibernate-core-5.4.33.jar:5.4.33]
        at org.hibernate.hql.internal.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:144) ~[hibernate-core-5.4.33.jar:5.4.33]
        at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:113) ~[hibernate-core-5.4.33.jar:5.4.33]
        at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:73) ~[hibernate-core-5.4.33.jar:5.4.33]
        at org.hibernate.engine.query.spi.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:162) ~[hibernate-core-5.4.33.jar:5.4.33]
        at org.hibernate.internal.AbstractSharedSessionContract.getQueryPlan(AbstractSharedSessionContract.java:613) ~[hibernate-core-5.4.33.jar:5.4.33]
        at org.hibernate.internal.AbstractSharedSessionContract.createQuery(AbstractSharedSessionContract.java:725) ~[hibernate-core-5.4.33.jar:5.4.33]
        ... 160 more
Caused by: org.hibernate.hql.internal.ast.QuerySyntaxException: ModelSummary is not mapped
        at org.hibernate.hql.internal.ast.util.SessionFactoryHelper.requireClassPersister(SessionFactoryHelper.java:169) ~[hibernate-core-5.4.33.jar:5.4.33]
        at org.hibernate.hql.internal.ast.tree.FromElementFactory.addFromElement(FromElementFactory.java:91) ~[hibernate-core-5.4.33.jar:5.4.33]
        at org.hibernate.hql.internal.ast.tree.FromClause.addFromElement(FromClause.java:77) ~[hibernate-core-5.4.33.jar:5.4.33]
        at org.hibernate.hql.internal.ast.HqlSqlWalker.createFromElement(HqlSqlWalker.java:333) ~[hibernate-core-5.4.33.jar:5.4.33]
        at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromElement(HqlSqlBaseWalker.java:3765) ~[hibernate-core-5.4.33.jar:5.4.33]
        at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromElementList(HqlSqlBaseWalker.java:3654) ~[hibernate-core-5.4.33.jar:5.4.33]
        at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromClause(HqlSqlBaseWalker.java:737) ~[hibernate-core-5.4.33.jar:5.4.33]
        at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:593) ~[hibernate-core-5.4.33.jar:5.4.33]
        at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:330) ~[hibernate-core-5.4.33.jar:5.4.33]
        at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.statement(HqlSqlBaseWalker.java:278) ~[hibernate-core-5.4.33.jar:5.4.33]
        at org.hibernate.hql.internal.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:276) ~[hibernate-core-5.4.33.jar:5.4.33]
        at org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:192) ~[hibernate-core-5.4.33.jar:5.4.33]
        at org.hibernate.hql.internal.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:144) ~[hibernate-core-5.4.33.jar:5.4.33]
        at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:113) ~[hibernate-core-5.4.33.jar:5.4.33]
        at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:73) ~[hibernate-core-5.4.33.jar:5.4.33]
        at org.hibernate.engine.query.spi.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:162) ~[hibernate-core-5.4.33.jar:5.4.33]
        at org.hibernate.internal.AbstractSharedSessionContract.getQueryPlan(AbstractSharedSessionContract.java:613) ~[hibernate-core-5.4.33.jar:5.4.33]
        at org.hibernate.internal.AbstractSharedSessionContract.createQuery(AbstractSharedSessionContract.java:725) ~[hibernate-core-5.4.33.jar:5.4.33]
        ... 160 more

另外，在Hibernate的代码仓库中未找到org.hibernate.hql.internal.ast.util.SessionFactoryHelper的源码，希望告知其所在位置。

内容的提问来源于stack exchange，提问作者Fengtao Ding