[jboss-jira] [JBoss JIRA] (AS7-5555) NullPointerException at org.hibernate.hql.internal.ast.HqlSqlWalker.createFromJoinElement(HqlSqlWalker.java:393)

[Scott Marlow (JIRA)]

    [ https://issues.jboss.org/browse/AS7-5555?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12721472#comment-12721472 ] 

Scott Marlow commented on AS7-5555:
-----------------------------------

The AS7 "JPA/Hibernate" jira component is for reporting bugs in our EE JPA container side implementation (e.g. @PersistenceContext injection is implemented by the container org.jboss.as.jpa.* codebase).  The JPA subsystem is also responsible for deployment of the persistence units. AS7 management console shows Hibernate JPA statistics which is made possible by integration code in the AS7 JPA subsystem.  To upgrade to a newer version of Hibernate in AS7, creating an AS7 jira is also the place to do that.

For bugs that are in the Hibernate codebase, creating a [HHH|https://hibernate.onjira.com/browse/HHH] jira is right. 

                
> NullPointerException      at org.hibernate.hql.internal.ast.HqlSqlWalker.createFromJoinElement(HqlSqlWalker.java:393)
> ---------------------------------------------------------------------------------------------------------------------
>
>                 Key: AS7-5555
>                 URL: https://issues.jboss.org/browse/AS7-5555
>             Project: Application Server 7
>          Issue Type: Bug
>          Components: JPA / Hibernate
>    Affects Versions: 7.1.2.Final (EAP)
>            Reporter: Ondrej Zizka
>            Assignee: Scott Marlow
>              Labels: NPE, NullPointerException, UX, usability
>
> A query 
> {code}
> SELECT pr FROM ProductRelease pr LEFT JOIN pr.line pl ORDER BY pl.name
> {code}
> on a simple entity in other entity causes a NPEx:
> {code}
> Caused by: java.lang.NullPointerException
> 	at org.hibernate.hql.internal.ast.HqlSqlWalker.createFromJoinElement(HqlSqlWalker.java:393) [hibernate-core-4.1.5.SP1.jar:4.1.5.SP1]
> 	at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.joinElement(HqlSqlBaseWalker.java:3516) [hibernate-core-4.1.5.SP1.jar:4.1.5.SP1]
> 	at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromElement(HqlSqlBaseWalker.java:3302) [hibernate-core-4.1.5.SP1.jar:4.1.5.SP1]
> 	at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromElementList(HqlSqlBaseWalker.java:3180) [hibernate-core-4.1.5.SP1.jar:4.1.5.SP1]
> 	at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromClause(HqlSqlBaseWalker.java:706) [hibernate-core-4.1.5.SP1.jar:4.1.5.SP1]
> 	at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:562) [hibernate-core-4.1.5.SP1.jar:4.1.5.SP1]
> 	at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:299) [hibernate-core-4.1.5.SP1.jar:4.1.5.SP1]
> 	at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.statement(HqlSqlBaseWalker.java:247) [hibernate-core-4.1.5.SP1.jar:4.1.5.SP1]
> 	at org.hibernate.hql.internal.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:248) [hibernate-core-4.1.5.SP1.jar:4.1.5.SP1]
> 	at org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:183) [hibernate-core-4.1.5.SP1.jar:4.1.5.SP1]
> 	at org.hibernate.hql.internal.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:136) [hibernate-core-4.1.5.SP1.jar:4.1.5.SP1]
> 	at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:105) [hibernate-core-4.1.5.SP1.jar:4.1.5.SP1]
> 	at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:80) [hibernate-core-4.1.5.SP1.jar:4.1.5.SP1]
> 	at org.hibernate.engine.query.spi.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:168) [hibernate-core-4.1.5.SP1.jar:4.1.5.SP1]
> 	at org.hibernate.internal.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:219) [hibernate-core-4.1.5.SP1.jar:4.1.5.SP1]
> 	at org.hibernate.internal.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:197) [hibernate-core-4.1.5.SP1.jar:4.1.5.SP1]
> 	at org.hibernate.internal.SessionImpl.createQuery(SessionImpl.java:1736) [hibernate-core-4.1.5.SP1.jar:4.1.5.SP1]
> 	at org.hibernate.ejb.AbstractEntityManagerImpl.createQuery(AbstractEntityManagerImpl.java:291) [hibernate-entitymanager-4.1.5.SP1.jar:4.1.5.SP1]
> 	at org.jboss.as.jpa.container.AbstractEntityManager.createQuery(AbstractEntityManager.java:425) [jboss-as-jpa-7.1.2.Final.jar:7.1.2.Final]
> {code}
> I'm filling this here since in Hibernate jira NPEx are (or used to be FWIR) ignored, whereas for AS 7 / EAP 6 we agreed that NPEx is not a good way to let user know that something's wrong. In this case, it's missing N:1 mapping annotation.

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