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<td class="page-title-pattern-first-line " style="padding: 0; 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-11057" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-a875ddb1-85ab-48eb-9ce0-8838e6d92853" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"></a> <a href="https://hibernate.atlassian.net/browse/HHH-11057" style="color: #3b73af; text-decoration: none">HHH-11057</a> </td>
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<td style="vertical-align: top;; padding: 0; 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-11057" style="color: #3b73af; text-decoration: none">Hibernate doesn't recognize Object in cyclic reference, results in StackOverflowError</a> </span> </td>
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<td class="has-icon" style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <img src="cid:jira-generated-image-avatar-a875ddb1-85ab-48eb-9ce0-8838e6d92853" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"> Bug </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Affects Versions:</th>
<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 5.2.2 </td>
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<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> Unassigned </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Attachments:</th>
<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> jpa_fetching_investigations-master.zip </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Components:</th>
<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> hibernate-core </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Created:</th>
<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 19/Aug/2016 03:23 AM </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Environment:</th>
<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> Java 1.8, Postgresql 9.4, Linux Ubuntu 15.10 </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Priority:</th>
<td class="has-icon" style="padding: 0; 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-trivial-c6e056b3-9680-4de2-b26b-ce7109ebd58d" height="16" width="16" border="0" align="absmiddle" alt="Trivial" style="vertical-align: text-bottom"> Trivial </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Reporter:</th>
<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="Siarzuk" id="email_Siarzuk" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=Siarzuk" style="color:#6c797f;; color: #3b73af; text-decoration: none">Rudziankou</a> </td>
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<td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0; border-collapse: collapse; padding: 0 0 10px"> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0; margin-top: 0">It seems like a very minor priority bug. Hibernate doesn't recognize Object in cyclic reference in a very bad designed relations architecture. Anyway it's a bug.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">The detailed description with source code is here: <a href="https://github.com/Sergei-Rudenkov/jpa_fetching_investigations/" class="external-link" rel="nofollow" style="color: #3b73af; text-decoration: none">https://github.com/Sergei-Rudenkov/jpa_fetching_investigations/</a><br> I attached <b>zip</b> with source code too.</p> <h3 style="margin: 10px 0 0; font-size: 16px; line-height: 1.563; margin: 30px 0 0"><a name="Iused%3A" style="color: #3b73af; text-decoration: none"></a>I used:</h3>
<ul class="alternate" type="square">
<li><b>Java 1.8</b></li>
<li><b>Spring boot</b> 1.3.1.RELEASE</li>
<li>Latest for time of writting <b>Hibernate</b> 5.2.4.Final</li>
<li>Postgresql 9.4</li>
</ul> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">I faced problem the same as OP in this question:<br> <a href="http://stackoverflow.com/questions/38874609/how-to-define-friendship-relationship-using-hibernate" class="external-link" rel="nofollow" style="color: #3b73af; text-decoration: none">http://stackoverflow.com/questions/38874609/how-to-define-friendship-relationship-using-hibernate</a></p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">References' dependencies are not trivial, and I would say <em>Badly Designed</em>, vialete sane DB normalization rules, I cannot say which one. Anyway it sounds like a bug against hibernate.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">> All JPA providers should be able to cope with eager loading of cyclic relations. Any problem should mean you raise a bug against the JPA provider.</p> <h3 style="margin: 10px 0 0; font-size: 16px; line-height: 1.563; margin: 30px 0 0"><a name="Reproducethebug%3A" style="color: #3b73af; text-decoration: none"></a>Reproduce the bug:</h3> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">So I fixed the problem by adding <em>LAZY</em>. Initialization to make problem came up again switch it back to <em>EAGER</em>:</p>
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<pre class="code-java" style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
<span class="code-keyword" style="color: #000091">public</span> class Member <span class="code-keyword" style="color: #000091">implements</span> Serializable {
<span class="code-comment" style="color: #808080">//...
</span> @OneToMany(fetch = FetchType.EAGER, mappedBy = <span class="code-quote" style="color: #009100">"requester"</span>)
<span class="code-keyword" style="color: #000091">private</span> Set[Friendship] friendRequests = <span class="code-keyword" style="color: #000091">new</span> HashSet[Friendship]();
@OneToMany(fetch = FetchType.EAGER, mappedBy = <span class="code-quote" style="color: #009100">"friend"</span>)
<span class="code-keyword" style="color: #000091">private</span> Set[Friendship] friends = <span class="code-keyword" style="color: #000091">new</span> HashSet[Friendship]();
</pre>
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</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">Add then several rows to each table:</p>
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<pre class="code-sql" style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
INSERT INTO member values(1, 'Aliaksei', 'Losyca', 'dvorik')
INSERT INTO member values(2, 'Siarzuk', 'Malinauka', 'kurik')
INSERT INTO friendship values(true, null, 'dvorik', 'kurik')
</pre>
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