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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-12210" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-70075072-48d1-42d5-892c-66415a126013" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"></a> <a href="https://hibernate.atlassian.net/browse/HHH-12210" style="color: #3b73af; text-decoration: none">HHH-12210</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-12210" style="color: #3b73af; text-decoration: none">Session is not unset for PersistentBag loaded in temp session. </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-70075072-48d1-42d5-892c-66415a126013" 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, 5.2.12 </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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<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"> 11/Jan/2018 19:24 PM </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"> JPA/JTA EXTENDED, UNSYNCHRONIZED persistent context <br> hibernate.enable_lazy_load_no_trans=true; </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"> <a class="user-hover" rel="mikhailchibel" id="email_mikhailchibel" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=mikhailchibel" style="color:#6c797f;; color: #3b73af; text-decoration: none">Mikhail Chibel</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">I noticed the issue in our system when trying to migrate to the latest version. In some scenarios, we start to receive </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">Caused by: org.hibernate.LazyInitializationException: could not initialize proxy - the owning Session was closed</pre>
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</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">. </p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">I looked into the issue and found that the behavior changed in version 5.2.2 and related to the fix created for issue <span class="jira-issue-macro resolved" data-jira-key="HHH-10942">
<!-- replace the span with an AUI template --> <a href="https://hibernate.atlassian.net/browse/HHH-10942" class="jira-issue-macro-key issue-link" title="Session not flushing starting from 5.2.0 in Karaf + Aries JPA & JTA " style="color: #3b73af; text-decoration: none"> <img class="icon" src="https://hibernate.atlassian.net/secure/viewavatar?size=xsmall&avatarId=12143&avatarType=issuetype"> HHH-10942 </a> <span class="aui-lozenge aui-lozenge-subtle aui-lozenge-success jira-macro-single-issue-export-pdf" style="background: #cccccc; border: 1px solid #cccccc; border-radius: 3px; color: #333333; display: inline-block; font-size: 11px; font-weight: bold; line-height: 99%; margin: 0; padding: 2px 5px; text-align: center; text-decoration: none; text-transform: uppercase; background-color: #ffffff; border-color: #cccccc; color: #333333" bgcolor="#ffffff">Closed</span> </span> - Session not flushing starting from 5.2.0 in Karaf + Arie and particularly in the commit <a href="https://github.com/hibernate/hibernate-orm/commit/109410b153f8e15ab3de3e99cb9924a085fe3a0f" class="external-link" rel="nofollow" style="color: #3b73af; text-decoration: none">https://github.com/hibernate/hibernate-orm/commit/109410b153f8e15ab3de3e99cb9924a085fe3a0f</a> SessionImpl.java</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">The lazy loading is broken for the following scenario. Suppose we have 2 classes <br> class A </p> { // lazy loaded List<B> itemsB; } <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">class B </p> { // lazy loaded List<C> itemsC; } <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">In our application we using extended persistent context and set "hibernate.enable_lazy_load_no_trans" flag to true; </p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">In request 1 we load an instance of class A and save the reference to the loaded instance in the memory. The instance of class A has itemsB lazy initialized.<br> In request 2 we trying to access itemsB property from the instance A loaded in the first request. As the session where A was loaded already closed (and set to null) Hibernate creates a temp session to load itemsB.Once they loaded the temp session is closed by hibernate. Afterwards, in the same request, we trying to iterate over itemsC for instance of B. The ItemsC is lazy loaded collection and it has a link to the session and because the session used to load itemsB already closed we have the exception. </p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">Previously, for all session, before the session is closed it will be removed from all lazyloaded collections so the collection then could be loaded with a new session. However, as part of changes in SessionImpl.class this is not true anymore. When session closing while the transaction is active, or in my case for temp session the session is not unset for lazy loaded collections. </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">if</span> ( discardOnClose || !isTransactionInProgress() ) {
+ <span class="code-keyword" style="color: #000091">super</span>.close();
+ }
+ <span class="code-keyword" style="color: #000091">else</span> {
+ <span class="code-comment" style="color: #808080">//Otherwise, session auto-close will be enabled by shouldAutoCloseSession().
</span> + waitingForAutoClose = <span class="code-keyword" style="color: #000091">true</span>;
+ closed = <span class="code-keyword" style="color: #000091">true</span>;
+ }
<span class="code-comment" style="color: #808080">// previous code
</span><span class="code-comment" style="color: #808080">// <span class="code-keyword" style="color: #000091; color: #808080">super</span>.close();</span>
</pre>
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