[OPENJPA-2429] NPE was thrown out when a @OrderBy modified column is being persisted.

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.2.1
• Component/s: datacache
• Environment: Windows 7; WebSphere 8.5
• Assignee: Unassigned
• Reporter: Kymair Wu
• Created: 23/Sep/13 06:39
• Updated: 27/Nov/19 11:32

Description

Following NPE was thrown out when a @OrderBy modified column is being persisted.

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)

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/[e-mail]%3E

Thanks!