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Date: Wed, 2 Oct 2013 15:32:43 +0000 (UTC)
From: "Rick Curtis (JIRA)" <jira@apache.org>
To: dev@openjpa.apache.org
Message-ID: <JIRA.12669993.1379918362987.462.1380727963680@arcas>
In-Reply-To: <JIRA.12669993.1379918362987@arcas>
References: <JIRA.12669993.1379918362987@arcas>
Subject: [jira] [Commented] (OPENJPA-2429) NPE was thrown out when a
 @OrderBy modified column is being persisted.
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    [ https://issues.apache.org/jira/browse/OPENJPA-2429?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13784072#comment-13784072 ] 

Rick Curtis commented on OPENJPA-2429:
--------------------------------------

Can you put together a small unit test that exposes this problem? If that is too onerous, posting snippets of the Entities involved would help recreate the problem.

> NPE was thrown out when a @OrderBy modified column is being persisted.
> ----------------------------------------------------------------------
>
>                 Key: OPENJPA-2429
>                 URL: https://issues.apache.org/jira/browse/OPENJPA-2429
>             Project: OpenJPA
>          Issue Type: Bug
>          Components: datacache
>    Affects Versions: 2.2.1
>         Environment: Windows 7
> WebSphere 8.5
>            Reporter: Kymair Wu
>
> Following NPE was thrown out when a @OrderBy modified column is being persisted.
> {quote}
> Caused by: java.lang.NullPointerException
>         at org.apache.openjpa.datacache.DataCachePCDataImpl.clearInverseRelationCache(DataCachePCDataImpl.java:179)
>         at org.apache.openjpa.datacache.DataCachePCDataImpl.storeField(DataCachePCDataImpl.java:159)
> {quote}
> I notice that getOrderDeclaration() of FieldMetaData will return null when both _orders and _orderDec are null, which cause the NPE.
> The only place _orders will be set after class initialization seems to be getOrders()? But getOrders() is not involved for all the FieldMetaData of "fields[i].getInverseMetaDatas()"
> I'm not sure whether this is a OpenJPA issue but whether this NPE should be handled internally? 
> Google returns a potential case but no more information found. See https://issues.apache.org/jira/browse/OPENJPA-2096?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel and http://mail-archives.apache.org/mod_mbox/openjpa-users/201006.mbox/%3C4C1BE781.9000406@cyberspaceroad.com%3E
> Thanks!


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