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<td class="page-title-pattern-first-line " style="padding: 0px; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; padding-top: 10px"> <a href="https://hibernate.atlassian.net/browse/HHH" style="color: #3b73af; text-decoration: none">Hibernate ORM</a> / <a href="https://hibernate.atlassian.net/browse/HHH-9960" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-static-bug-19947ab5-6e9f-42c9-a88b-b36e0547dd61" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom" /></a> <a href="https://hibernate.atlassian.net/browse/HHH-9960" style="color: #3b73af; text-decoration: none">HHH-9960</a>
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<td style="vertical-align: top;; padding: 0px; border-collapse: collapse; padding-right: 5px; font-size: 20px; line-height: 30px; mso-line-height-rule: exactly" class="page-title-pattern-header-container"> <span class="page-title-pattern-header" style="font-family: Arial, sans-serif; padding: 0; font-size: 20px; line-height: 30px; mso-text-raise: 2px; mso-line-height-rule: exactly; vertical-align: middle"> <a href="https://hibernate.atlassian.net/browse/HHH-9960" style="color: #3b73af; text-decoration: none">find() returns an entity holding an non-managed entity annoted with @MapsId</a> </span>
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Issue Type:
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<td class="has-icon" style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <img src="cid:jira-generated-image-static-bug-19947ab5-6e9f-42c9-a88b-b36e0547dd61" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom" /> Bug
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Affects Versions:
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4.3.7
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Assignee:
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Unassigned
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Components:
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hibernate-core, hibernate-entitymanager
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Created:
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21/Jul/2015 08:00 AM
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Environment:
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(Oracle 12c)
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Priority:
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Reporter:
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<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="jidehem" id="email_jidehem" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=jidehem" style="color:#6c797f;; color: #3b73af; text-decoration: none">Maillefer Jean-David</a>
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Originally posted on <a href="http://stackoverflow.com/questions/31525231/is-it-normal-for-jpa-to-return-detached-instances-for-mapsid-field" class="external-link" rel="nofollow" style="color: #3b73af; text-decoration: none">stackoverflow</a>.</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Entity from @MapsId over an entiy directly returned by EntityManager.find() may not be managed !</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">The case where it happened is in an extended transaction context and the <tt>@MapsId</tt> entity was retrieved from Hibernate cache. However it is not managed.</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Sample code</p>
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<pre class="code-java" style="margin: 10px 0 0 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
@Repository
@Transactional
<span class="code-keyword" style="color: #000091">public</span> class SuiviDao {
<span class="code-keyword" style="color: #000091">public</span> Suivi getSuivi(SuiviPK pk) {
<span class="code-keyword" style="color: #000091">final</span> Suivi suivi = em.find(Suivi.class, pk);
<span class="code-comment" style="color: #808080">// ok
</span> <span class="code-keyword" style="color: #000091">assert</span> em.contains(suivi);
<span class="code-comment" style="color: #808080">// <span class="code-keyword" style="color: #000091; color: #808080">throws</span> occasionally an assertion error
</span> <span class="code-keyword" style="color: #000091">assert</span> em.contains(suivi.getCommune());
<span class="code-keyword" style="color: #000091">return</span> suivi;
}
}
</pre>
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Relevant part of the related classes:</p>
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<div class="codeContent panelContent" style="padding: 9px 12px">
<pre class="code-java" style="margin: 10px 0 0 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
@Entity
<span class="code-keyword" style="color: #000091">public</span> class Suivi {
@EmbeddedId
<span class="code-keyword" style="color: #000091">private</span> SuiviPK pk = <span class="code-keyword" style="color: #000091">new</span> SuiviPK();
@MapsId(<span class="code-quote" style="color: #009100">"commune"</span>)
@ManyToOne
<span class="code-keyword" style="color: #000091">private</span> Commune commune;
@MapsId(<span class="code-quote" style="color: #009100">"echeance"</span>)
@NotNull
@ManyToOne(cascade = { CascadeType.REFRESH })
<span class="code-keyword" style="color: #000091">private</span> Echeance echeance;
<span class="code-comment" style="color: #808080">// remaining of class body
</span>}
@Embeddable
<span class="code-keyword" style="color: #000091">public</span> class SuiviPK <span class="code-keyword" style="color: #000091">implements</span> Serializable {
@Column(name = <span class="code-quote" style="color: #009100">"ECHEANCE"</span>)
<span class="code-keyword" style="color: #000091">private</span> <span class="code-object" style="color: #910091">Long</span> echeance;
@Column(name = <span class="code-quote" style="color: #009100">"COMMUNE"</span>)
<span class="code-keyword" style="color: #000091">private</span> <span class="code-object" style="color: #910091">Long</span> commune;
<span class="code-comment" style="color: #808080">// remaining of class body
</span>}
</pre>
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Workaround: load the entity from DB</p>
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<pre class="code-java" style="margin: 10px 0 0 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
<span class="code-keyword" style="color: #000091">if</span> (!em.contains(suivi.getCommune())) {
<span class="code-keyword" style="color: #000091">final</span> Commune commune = em.find(Commune.class, suivi.getCommune().getId());
suivi.setCommune(commune);
}
</pre>
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