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https://issues.apache.org/jira/browse/OPENJPA-2429?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14118733#comment-14118733
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Mark Lilback commented on OPENJPA-2429:
---------------------------------------
I'm seeing the same bug. Here are the details:
Class RCUser has:
@Id
private int id;
@OneToMany(targetEntity = Project.class, fetch = FetchType.LAZY,
mappedBy = "user", cascade = CascadeType.ALL)
@OrderBy("name DESC")
private Set<Project> projects = new HashSet<Project>();
Class Project has:
@Id
private int id;
@Basic
private String name;
@ManyToOne(fetch=FetchType.LAZY)
@JoinColumn(name="userid", nullable=false)
private RCUser user;
My resource basically does the following with input values of pid and pname:
em.getTransaction().begin();
p = em.find(Project.class, pid);
p.setName(pname);
em.getTransaction().commit();
I do lots of validation on the input, it is all valid and not-null.
relevant stack trace lines are:
org.apache.openjpa.persistence.RollbackException: null
at
org.apache.openjpa.persistence.EntityManagerImpl.commit(EntityManagerImpl.java:594)
~[openjpa-all-2.2.0.jar:2.2.0]
Caused by: org.apache.openjpa.persistence.PersistenceException: null
at
org.apache.openjpa.kernel.BrokerImpl.afterCompletion(BrokerImpl.java:2034)
~[openjpa-all-2.2.0.jar:2.2.0]
Caused by: java.lang.NullPointerException: null
at
org.apache.openjpa.datacache.DataCachePCDataImpl.clearInverseRelationCache(DataCachePCDataImpl.java:179)
~[openjpa-all-2.2.0.jar:2.2.0]
at
org.apache.openjpa.datacache.DataCachePCDataImpl.storeField(DataCachePCDataImpl.java:159)
~[openjpa-all-2.2.0.jar:2.2.0]
at org.apache.openjpa.kernel.PCDataImpl.store(PCDataImpl.java:263)
~[openjpa-all-2.2.0.jar:2.2.0]
If I comment out the @OrderBy line, no exception is raised.
> 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/%[email protected]%3E
> Thanks!
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