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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?atlOrigin=eyJpIjoiNjc3OGMzMjZkNjUzNDk2MWJmZWMzYzUxNzNkZDAzZTIiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none">Hibernate ORM</a> / <a href="https://hibernate.atlassian.net/browse/HHH-13915?atlOrigin=eyJpIjoiNjc3OGMzMjZkNjUzNDk2MWJmZWMzYzUxNzNkZDAzZTIiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-5acbc766-b853-4e5d-b8a8-e9f6ff9712fe" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"></a> <a href="https://hibernate.atlassian.net/browse/HHH-13915?atlOrigin=eyJpIjoiNjc3OGMzMjZkNjUzNDk2MWJmZWMzYzUxNzNkZDAzZTIiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none">HHH-13915</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-13915?atlOrigin=eyJpIjoiNjc3OGMzMjZkNjUzNDk2MWJmZWMzYzUxNzNkZDAzZTIiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none">Shared state in ByteBuddy basic proxies leads to intermittently broken persistence</a> </span> </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">Change By:</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="henry.clout" style="color:#6c797f;; color: #3b73af; text-decoration: none" id="email_henry.clout" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=5bd6e4bbdd3cc64b77e71f5f"> Henry Clout </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"> <span class="diffcontext">When</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"> persisting a parent, child relationship - cascaded from parent to child - with</span> <span class="diffcontext"> the</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"> child having a composite unique key configured as:<br>{code}<br><?xml version="1.0" encoding="UTF-8"?><br><!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"<br> "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"><br><hibernate-mapping package="com.qumu"><br> <class name="MetadataValue" table="metadata_value"><br> <id column="id" name="id" type="long"><br> <generator class="native"><br> <param name="sequence">hibernate_sequence</param><br> </generator><br> </id><br> <properties name="unique-props" unique="true"><br> <property column="guid" name="guid" not-null="true" type="string"/><br> <many-to-one class="com.qumu.Customer" column="customer_id" name="customer" not-null="true"/><br> </properties><br> </class><br></hibernate-mapping><br>{code}<br>A</span> <span class="diffaddedchars" style="background-color:#ddfade;"> ByteBuddy</span> <span class="diffcontext"> BasicProxyFactoryImpl is used</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"> by Hibernate</span> <span class="diffcontext"> to</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"> proxy the composite unique key values. However</span> <span class="diffaddedchars" style="background-color:#ddfade;"> generate proxies</span> <span class="diffcontext">,</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"> this factory generates</span> <span class="diffaddedchars" style="background-color:#ddfade;"> the</span> <span class="diffcontext"> proxies</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"> which</span> <span class="diffaddedchars" style="background-color:#ddfade;"> it generates</span> <span class="diffcontext"> share a</span> <span class="diffaddedchars" style="background-color:#ddfade;"> common</span> <span class="diffcontext"> ProxyConfiguration.Interceptor</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">. As</span> <span class="diffaddedchars" style="background-color:#ddfade;"> - which is used to hold</span> <span class="diffcontext"> the</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"> interceptor holds the</span> <span class="diffcontext"> bean state</span> <span class="diffaddedchars" style="background-color:#ddfade;">. This then breaks</span> <span class="diffcontext"> during</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"> persistence, this leads to persistence failure under</span> <span class="diffcontext"> concurrent use</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">.<br><br>In our particular use case, this manifested</span> <span class="diffcontext"> as</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"> unique constraint failures as the guid property above was reused by</span> <span class="diffaddedchars" style="background-color:#ddfade;"> parallel</span> <span class="diffcontext"> threads</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"> sharing</span> <span class="diffaddedchars" style="background-color:#ddfade;"> compete for</span> <span class="diffcontext"> the</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"> interceptor</span> <span class="diffaddedchars" style="background-color:#ddfade;"> state</span> <span class="diffcontext">.<br><br>Proposed solution is to instantiate a new interceptor per innovation of {{ BasicProxyFactoryImpl. getProxy() }} </span> <span class="diffaddedchars" style="background-color:#ddfade;"><br><br>A PR has been raised as per this proposal.</span> </td>
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