[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:all-tabpanel ]

Scott Marlow resolved AS7-5555.
-------------------------------

    Resolution: Rejected

    
> 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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