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                                            Change By:
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                            <td class="email-content-main mobile-expand  issue-description-container" style="padding: 0px; border-collapse: collapse; border-left: 1px solid #ccc; border-right: 1px solid #ccc; border-top: 0; border-bottom: 0; padding: 0 15px 0 16px; background-color: #fff; padding-top: 5px; padding-bottom: 10px"> 
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                                        <td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0px; border-collapse: collapse; padding: 0 0 10px 0"> <span class="diffcontext">The&nbsp;fix&nbsp;for&nbsp;HHH-6848&nbsp;causes&nbsp;IllegalStateException&nbsp;when&nbsp;merging&nbsp;an&nbsp;entity&nbsp;results&nbsp;in&nbsp;merging&nbsp;more&nbsp;than&nbsp;one&nbsp;representation&nbsp;of&nbsp;the&nbsp;same&nbsp;detached&nbsp;entity.<br /><br />For&nbsp;example,&nbsp;Hibernate&nbsp;throws&nbsp;IllegalStateException&nbsp;when&nbsp;merging&nbsp;entity&nbsp;'x'&nbsp;if&nbsp;it&nbsp;has&nbsp;references&nbsp;to&nbsp;2&nbsp;detached&nbsp;entities&nbsp;'y1'&nbsp;and&nbsp;'y2'&nbsp;(obtained&nbsp;from&nbsp;different&nbsp;sessions),&nbsp;and&nbsp;y1&nbsp;and&nbsp;y2&nbsp;represent&nbsp;the&nbsp;same&nbsp;persistent&nbsp;entity.<br /><br /></span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">When&nbsp;one&nbsp;of</span> <span class="diffaddedchars" style="background-color:#ddfade;">Documentation&nbsp;will&nbsp;be&nbsp;added&nbsp;to</span> <span class="diffcontext">&nbsp;the</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">&nbsp;representations</span> <span class="diffaddedchars" style="background-color:#ddfade;">&nbsp;manual&nbsp;by&nbsp;HHH-9216.&nbsp;Here</span> <span class="diffcontext">&nbsp;is</span> <span class="diffaddedchars" style="background-color:#ddfade;">&nbsp;some&nbsp;documentation&nbsp;to&nbsp;get&nbsp;people&nbsp;going.<br /><br />OVERVIEW:<br /><br />A&nbsp;new&nbsp;configuration&nbsp;property,&nbsp;hibernate.event.merge.entity_copy_observer,&nbsp;controls&nbsp;how&nbsp;Hibernate&nbsp;will&nbsp;respond&nbsp;when&nbsp;multiple&nbsp;representations&nbsp;of</span> <span class="diffcontext">&nbsp;the</span> <span class="diffaddedchars" style="background-color:#ddfade;">&nbsp;same&nbsp;persistent&nbsp;entity&nbsp;(</span> <span class="diffcontext">&nbsp;&quot;</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">root</span> <span class="diffaddedchars" style="background-color:#ddfade;">entity&nbsp;copy</span> <span class="diffcontext">&quot;</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">&nbsp;object&nbsp;&nbsp;being&nbsp;merged&nbsp;(e</span> <span class="diffaddedchars" style="background-color:#ddfade;">)&nbsp;is&nbsp;detected&nbsp;while&nbsp;merging</span> <span class="diffcontext">.</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">g</span> <span class="diffaddedchars" style="background-color:#ddfade;"><br /><br />hibernate</span> <span class="diffcontext">.</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">,&nbsp;session</span> <span class="diffaddedchars" style="background-color:#ddfade;">event</span> <span class="diffcontext">.merge</span> <span class="diffaddedchars" style="background-color:#ddfade;">.entity_copy_observer&nbsp;can&nbsp;be&nbsp;set&nbsp;to&nbsp;one&nbsp;of&nbsp;the&nbsp;following&nbsp;values:<br />*&nbsp;disallow</span> <span class="diffcontext">(</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">&nbsp;y1</span> <span class="diffaddedchars" style="background-color:#ddfade;">the&nbsp;default</span> <span class="diffcontext">&nbsp;)</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">),&nbsp;and&nbsp;another&nbsp;representation</span> <span class="diffaddedchars" style="background-color:#ddfade;">:&nbsp;throws&nbsp;IllegalStateException&nbsp;if&nbsp;an&nbsp;entity&nbsp;copy</span> <span class="diffcontext">&nbsp;is</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">&nbsp;encountered&nbsp;on&nbsp;cascade-</span> <span class="diffaddedchars" style="background-color:#ddfade;">&nbsp;detected;<br />*&nbsp;allow:&nbsp;performs&nbsp;the</span> <span class="diffcontext">merge</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">,</span> <span class="diffaddedchars" style="background-color:#ddfade;">&nbsp;operation&nbsp;on&nbsp;each&nbsp;entity&nbsp;copy&nbsp;that&nbsp;is&nbsp;detected;<br />*&nbsp;log:&nbsp;(provided&nbsp;for&nbsp;testing&nbsp;only)&nbsp;performs</span> <span class="diffcontext">&nbsp;the&nbsp;merge</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">&nbsp;result&nbsp;should</span> <span class="diffaddedchars" style="background-color:#ddfade;">&nbsp;operation&nbsp;on&nbsp;each&nbsp;entity&nbsp;copy&nbsp;that&nbsp;is&nbsp;detected&nbsp;and&nbsp;logs&nbsp;information&nbsp;about&nbsp;the&nbsp;entity&nbsp;copies.&nbsp;This&nbsp;setting&nbsp;requires&nbsp;DEBUG&nbsp;logging</span> <span class="diffcontext">&nbsp;be</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">&nbsp;as&nbsp;copied&nbsp;from</span> <span class="diffaddedchars" style="background-color:#ddfade;">&nbsp;enabled&nbsp;for&nbsp;org.hibernate.event.internal.EntityCopyAllowedLoggedObserver.<br /><br />In&nbsp;addition</span> <span class="diffcontext">&nbsp;the</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">&nbsp;root&nbsp;object;</span> <span class="diffaddedchars" style="background-color:#ddfade;">&nbsp;application&nbsp;may&nbsp;customize&nbsp;the&nbsp;behavior&nbsp;by&nbsp;providing&nbsp;an&nbsp;implementation&nbsp;of&nbsp;&nbsp;org.hibernate.event.spi.EntityCopyObserver</span> <span class="diffcontext">&nbsp;and</span> <span class="diffaddedchars" style="background-color:#ddfade;">&nbsp;setting&nbsp;hibernate.event.merge.entity_copy_observer&nbsp;to</span> <span class="diffcontext">&nbsp;the</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">&nbsp;representation&nbsp;encountered&nbsp;while&nbsp;cascading&nbsp;should&nbsp;be&nbsp;ignored</span> <span class="diffaddedchars" style="background-color:#ddfade;">&nbsp;class&nbsp;name</span> <span class="diffcontext">.<br /><br />When</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">&nbsp;top-level&nbsp;merges&nbsp;are&nbsp;used&nbsp;to</span> <span class="diffaddedchars" style="background-color:#ddfade;">&nbsp;hibernate.event.</span> <span class="diffcontext">&nbsp;merge</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">&nbsp;multiple&nbsp;representations</span> <span class="diffaddedchars" style="background-color:#ddfade;">.entity_copy_observer=allow&nbsp;or&nbsp;log,&nbsp;Hibernate&nbsp;will&nbsp;merge&nbsp;each&nbsp;entity&nbsp;copy&nbsp;detected&nbsp;while&nbsp;cascading&nbsp;the&nbsp;merge&nbsp;operation.&nbsp;In&nbsp;the&nbsp;process</span> <span class="diffcontext">&nbsp;of</span> <span class="diffaddedchars" style="background-color:#ddfade;">&nbsp;merging&nbsp;each&nbsp;entity&nbsp;copy,&nbsp;Hibernate&nbsp;will&nbsp;cascade</span> <span class="diffcontext">&nbsp;the</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">&nbsp;same</span> <span class="diffaddedchars" style="background-color:#ddfade;">&nbsp;merge&nbsp;operation&nbsp;from&nbsp;each</span> <span class="diffcontext">&nbsp;entity</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">&nbsp;as&nbsp;in:<br /><br />{code}<br />y</span> <span class="diffaddedchars" style="background-color:#ddfade;">&nbsp;copy&nbsp;to&nbsp;its&nbsp;assocations&nbsp;with&nbsp;cascade</span> <span class="diffcontext">&nbsp;=</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">&nbsp;(Y)&nbsp;s</span> <span class="diffaddedchars" style="background-color:#ddfade;">CascadeType</span> <span class="diffcontext">.</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">merge(&nbsp;y1&nbsp;);</span> <span class="diffaddedchars" style="background-color:#ddfade;">MERGE&nbsp;or&nbsp;CascadeType.ALL.&nbsp;The&nbsp;entity&nbsp;state&nbsp;resulting&nbsp;from&nbsp;merging&nbsp;an&nbsp;entity&nbsp;copy&nbsp;will&nbsp;be&nbsp;overwritten&nbsp;when&nbsp;another&nbsp;entity&nbsp;copy&nbsp;is&nbsp;merged.</span> <span class="diffcontext"><br /></span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">y&nbsp;=</span> <span class="diffaddedchars" style="background-color:#ddfade;"><br />There&nbsp;are&nbsp;no&nbsp;known&nbsp;issues&nbsp;with&nbsp;merging&nbsp;multiple&nbsp;entity&nbsp;copies&nbsp;as&nbsp;long&nbsp;as&nbsp;they&nbsp;are&nbsp;consistent</span> <span class="diffcontext">&nbsp;(</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">Y)&nbsp;s</span> <span class="diffaddedchars" style="background-color:#ddfade;">i</span> <span class="diffcontext">.</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">merge(&nbsp;y2</span> <span class="diffaddedchars" style="background-color:#ddfade;">e.&nbsp;have&nbsp;the&nbsp;same&nbsp;property/association&nbsp;values</span> <span class="diffcontext">&nbsp;)</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">;</span> <span class="diffaddedchars" style="background-color:#ddfade;">.</span> <span class="diffcontext"><br /></span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">{code}</span> <span class="diffcontext"><br /></span> <span class="diffaddedchars" style="background-color:#ddfade;">RISKS&nbsp;OF&nbsp;MERGING&nbsp;ENTITY&nbsp;COPIES:</span> <span class="diffcontext"><br /></span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">The</span> <span class="diffaddedchars" style="background-color:#ddfade;"><br />Because&nbsp;cascade&nbsp;order&nbsp;is&nbsp;undefined,&nbsp;the&nbsp;order&nbsp;in&nbsp;which&nbsp;the&nbsp;entity&nbsp;copies&nbsp;are&nbsp;merged&nbsp;is&nbsp;undefined.&nbsp;As&nbsp;a&nbsp;result,&nbsp;if&nbsp;property&nbsp;values&nbsp;in&nbsp;the&nbsp;entity&nbsp;copies&nbsp;are&nbsp;not&nbsp;consistent,&nbsp;the&nbsp;resulting&nbsp;entity</span> <span class="diffcontext">&nbsp;state</span> <span class="diffaddedchars" style="background-color:#ddfade;">&nbsp;will&nbsp;be&nbsp;indeterminate&nbsp;and&nbsp;data&nbsp;will&nbsp;be&nbsp;lost</span> <span class="diffcontext">&nbsp;from</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">&nbsp;y2&nbsp;should&nbsp;&quot;win&quot;</span> <span class="diffaddedchars" style="background-color:#ddfade;">&nbsp;all&nbsp;entity&nbsp;copies&nbsp;except&nbsp;for&nbsp;the&nbsp;last&nbsp;one&nbsp;merged</span> <span class="diffcontext">.<br /><br /></span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">In&nbsp;other&nbsp;cases</span> <span class="diffaddedchars" style="background-color:#ddfade;">If&nbsp;an&nbsp;entity&nbsp;copy&nbsp;cascades&nbsp;the&nbsp;merge&nbsp;operation&nbsp;to&nbsp;an&nbsp;association&nbsp;that&nbsp;is&nbsp;(or&nbsp;contains)&nbsp;a&nbsp;new&nbsp;entity</span> <span class="diffcontext">,</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">&nbsp;one&nbsp;representation</span> <span class="diffaddedchars" style="background-color:#ddfade;">&nbsp;that&nbsp;new&nbsp;entity</span> <span class="diffcontext">&nbsp;will</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">&nbsp;&quot;win&quot;;&nbsp;any&nbsp;other&nbsp;representations</span> <span class="diffaddedchars" style="background-color:#ddfade;">&nbsp;be&nbsp;merged&nbsp;(i.e,&nbsp;persisted&nbsp;and&nbsp;the&nbsp;merge&nbsp;operation</span> <span class="diffcontext">&nbsp;will&nbsp;be</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">&nbsp;ignored</span> <span class="diffaddedchars" style="background-color:#ddfade;">&nbsp;cascaded&nbsp;to&nbsp;its&nbsp;associations&nbsp;according&nbsp;to&nbsp;its&nbsp;mapping),&nbsp;even&nbsp;if&nbsp;that&nbsp;same&nbsp;association&nbsp;is&nbsp;ultimately&nbsp;overwritten&nbsp;when&nbsp;Hibernate&nbsp;merges&nbsp;a&nbsp;different&nbsp;representation&nbsp;having&nbsp;a&nbsp;different&nbsp;value&nbsp;for&nbsp;its&nbsp;association</span> <span class="diffcontext">.</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">&nbsp;Because&nbsp;cascade-order</span> <span class="diffaddedchars" style="background-color:#ddfade;">&nbsp;If&nbsp;the&nbsp;association</span> <span class="diffcontext">&nbsp;is</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">&nbsp;indeterminate</span> <span class="diffaddedchars" style="background-color:#ddfade;">&nbsp;mapped&nbsp;with&nbsp;orphanRemoval=true</span> <span class="diffcontext">,</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">&nbsp;it</span> <span class="diffaddedchars" style="background-color:#ddfade;">&nbsp;the&nbsp;new&nbsp;entity</span> <span class="diffcontext">&nbsp;will&nbsp;not&nbsp;be</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">&nbsp;possible&nbsp;to&nbsp;know&nbsp;which&nbsp;will&nbsp;be</span> <span class="diffaddedchars" style="background-color:#ddfade;">&nbsp;deleted&nbsp;because</span> <span class="diffcontext">&nbsp;the</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">&nbsp;winner</span> <span class="diffaddedchars" style="background-color:#ddfade;">&nbsp;semantics&nbsp;of&nbsp;orphanRemoval&nbsp;do&nbsp;not&nbsp;apply&nbsp;if&nbsp;the&nbsp;entity&nbsp;being&nbsp;orphaned&nbsp;is&nbsp;a&nbsp;new&nbsp;entity</span> <span class="diffcontext">.<br /><br /></span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">It</span> <span class="diffaddedchars" style="background-color:#ddfade;">There&nbsp;are&nbsp;known&nbsp;issues&nbsp;when&nbsp;representations&nbsp;of&nbsp;the&nbsp;same&nbsp;persistent&nbsp;entity&nbsp;have&nbsp;different&nbsp;values&nbsp;for&nbsp;a&nbsp;collection.&nbsp;See&nbsp;HHH-9239&nbsp;and&nbsp;HHH-9240&nbsp;for&nbsp;details.&nbsp;These&nbsp;issues&nbsp;can&nbsp;cause&nbsp;data&nbsp;loss&nbsp;or&nbsp;corruption.<br /><br />By&nbsp;setting&nbsp;hibernate.event.merge.entity_copy_observer=allow&nbsp;or&nbsp;log,&nbsp;Hibernate&nbsp;will&nbsp;allow&nbsp;entity&nbsp;copies&nbsp;of&nbsp;any&nbsp;type&nbsp;of&nbsp;entity&nbsp;to&nbsp;be&nbsp;merged.&nbsp;The&nbsp;only&nbsp;way&nbsp;to&nbsp;exclude&nbsp;particular&nbsp;entity&nbsp;classes&nbsp;or&nbsp;associations&nbsp;that&nbsp;contain&nbsp;critical&nbsp;data</span> <span class="diffcontext">&nbsp;is</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">&nbsp;possible</span> <span class="diffcontext">&nbsp;to</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">&nbsp;log</span> <span class="diffaddedchars" style="background-color:#ddfade;">&nbsp;provide&nbsp;a&nbsp;custom&nbsp;implementation&nbsp;of&nbsp;org.hibernate.event.spi.EntityCopyObserver&nbsp;with</span> <span class="diffcontext">&nbsp;the</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">&nbsp;current&nbsp;database&nbsp;state</span> <span class="diffaddedchars" style="background-color:#ddfade;">&nbsp;desired&nbsp;behavior</span> <span class="diffcontext">,</span> <span class="diffaddedchars" style="background-color:#ddfade;">&nbsp;and&nbsp;setting&nbsp;hibernate.event.merge.entity_copy_observer&nbsp;to</span> <span class="diffcontext">&nbsp;the</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">&nbsp;winner</span> <span class="diffaddedchars" style="background-color:#ddfade;">&nbsp;class&nbsp;name.<br /><br />RECOMMENDATIONS:<br /><br />Hibernate&nbsp;provides&nbsp;limited&nbsp;DEBUG&nbsp;logging&nbsp;capabilities&nbsp;that&nbsp;can&nbsp;help&nbsp;determine&nbsp;the&nbsp;entity&nbsp;classes&nbsp;for&nbsp;which&nbsp;entity&nbsp;copies&nbsp;were&nbsp;found.&nbsp;By&nbsp;setting&nbsp;hibernate.event.merge.entity_copy_observer=log</span> <span class="diffcontext">&nbsp;and</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">&nbsp;losers</span> <span class="diffaddedchars" style="background-color:#ddfade;">&nbsp;enabling&nbsp;DEBUG&nbsp;logging&nbsp;for&nbsp;org</span> <span class="diffcontext">.</span> <span class="diffaddedchars" style="background-color:#ddfade;">hibernate.event.internal.EntityCopyAllowedLoggedObserver,&nbsp;the&nbsp;following&nbsp;will&nbsp;be&nbsp;logged&nbsp;each&nbsp;time&nbsp;an&nbsp;application&nbsp;calls&nbsp;EntityManager.merge(&nbsp;entity&nbsp;)&nbsp;or&nbsp;Session.merge(&nbsp;entity&nbsp;):</span> <span class="diffcontext"><br /></span> <span class="diffaddedchars" style="background-color:#ddfade;">-&nbsp;number&nbsp;of&nbsp;times&nbsp;multiple&nbsp;representations&nbsp;of&nbsp;the&nbsp;same&nbsp;persistent&nbsp;entity&nbsp;was&nbsp;detected&nbsp;summarized&nbsp;by&nbsp;entity&nbsp;name;</span> <span class="diffcontext"><br /></span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">We'll&nbsp;need&nbsp;to&nbsp;work&nbsp;out</span> <span class="diffaddedchars" style="background-color:#ddfade;">-</span> <span class="diffcontext">&nbsp;details</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">&nbsp;about&nbsp;what&nbsp;gets&nbsp;logged</span> <span class="diffaddedchars" style="background-color:#ddfade;">&nbsp;by&nbsp;entity&nbsp;name</span> <span class="diffcontext">&nbsp;and</span> <span class="diffaddedchars" style="background-color:#ddfade;">&nbsp;ID,&nbsp;including&nbsp;output&nbsp;from&nbsp;calling&nbsp;toString()&nbsp;on&nbsp;each&nbsp;representation&nbsp;being&nbsp;merged&nbsp;as&nbsp;well&nbsp;as</span> <span class="diffcontext">&nbsp;the</span> <span class="diffaddedchars" style="background-color:#ddfade;">&nbsp;merge&nbsp;result.<br /><br />The</span> <span class="diffcontext">&nbsp;log</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">&nbsp;level&nbsp;(INFO</span> <span class="diffaddedchars" style="background-color:#ddfade;">&nbsp;should&nbsp;be&nbsp;reviewed&nbsp;to&nbsp;determine&nbsp;if&nbsp;multiple&nbsp;representations&nbsp;of&nbsp;entities&nbsp;containing&nbsp;critical&nbsp;data&nbsp;are&nbsp;detected.&nbsp;If&nbsp;so</span> <span class="diffcontext">,</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">&nbsp;WARN</span> <span class="diffaddedchars" style="background-color:#ddfade;">&nbsp;the&nbsp;application&nbsp;should&nbsp;be&nbsp;modified&nbsp;so&nbsp;there&nbsp;is&nbsp;only&nbsp;one&nbsp;representation</span> <span class="diffcontext">,</span> <span class="diffaddedchars" style="background-color:#ddfade;">&nbsp;and&nbsp;a&nbsp;custom&nbsp;implementation&nbsp;of&nbsp;org</span> <span class="diffcontext">&nbsp;.</span> <span class="diffaddedchars" style="background-color:#ddfade;">hibernate</span> <span class="diffcontext">.</span> <span class="diffaddedchars" style="background-color:#ddfade;">event</span> <span class="diffcontext">.</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">)</span> <span class="diffaddedchars" style="background-color:#ddfade;">spi.EntityCopyObserver&nbsp;should&nbsp;be&nbsp;provided&nbsp;to&nbsp;disallow&nbsp;entity&nbsp;copies&nbsp;for&nbsp;entities&nbsp;with&nbsp;critical&nbsp;data.<br /><br />Using&nbsp;optimistic&nbsp;locking&nbsp;is&nbsp;recommended&nbsp;to&nbsp;detect&nbsp;if&nbsp;different&nbsp;representations&nbsp;are&nbsp;from&nbsp;different&nbsp;versions&nbsp;of&nbsp;the&nbsp;same&nbsp;persistent&nbsp;entity.&nbsp;If&nbsp;they&nbsp;are&nbsp;not&nbsp;from&nbsp;the&nbsp;same&nbsp;version,&nbsp;Hibernate&nbsp;will&nbsp;throw&nbsp;StaleObjectStateException.</span> 
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                                                    <td class="actions-pattern-action-icon-container" style="padding: 0px; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; line-height: 20px; mso-line-height-rule: exactly; mso-text-raise: 0px; vertical-align: middle"> <a href="https://hibernate.atlassian.net/browse/HHH-9106#add-comment" target="_blank" title="Add Comment" style="color: #3b73af; text-decoration: none"> <img class="actions-pattern-action-icon-image" src="cid:jira-generated-image-static-comment-icon-b694cb32-114b-451d-bb8c-e7414767bf44" alt="Add Comment" title="Add Comment" height="16" width="16" border="0" style="vertical-align: middle" /> </a> 
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                                                    <td class="actions-pattern-action-text-container" style="padding: 0px; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; line-height: 20px; mso-line-height-rule: exactly; mso-text-raise: 4px; padding-left: 5px"> <a href="https://hibernate.atlassian.net/browse/HHH-9106#add-comment" target="_blank" title="Add Comment" style="color: #3b73af; text-decoration: none">Add Comment</a> 
                                                    </td> 
                                                </tr> 
                                            </table> 
                                        </td> 
                                    </tr> 
                                </table> 
                            </td> 
                        </tr> 
                        <!-- there needs to be content in the cell for it to render in some clients --> 
                        <tr> 
                            <td class="email-content-rounded-bottom mobile-expand" style="padding: 0px; border-collapse: collapse; color: #fff; padding: 0 15px 0 16px; height: 5px; line-height: 5px; background-color: #fff; border-top: 0; border-left: 1px solid #ccc; border-bottom: 1px solid #ccc; border-right: 1px solid #ccc; border-bottom-right-radius: 5px; border-bottom-left-radius: 5px; mso-line-height-rule: exactly">
                                &nbsp;
                            </td> 
                        </tr> 
                    </table> 
                </td> 
            </tr> 
            <tr> 
                <td id="footer-pattern" style="padding: 0px; border-collapse: collapse; padding: 12px 20px"> 
                    <table id="footer-pattern-container" cellspacing="0" cellpadding="0" border="0" style="border-collapse: collapse; mso-table-lspace: 0pt; mso-table-rspace: 0pt"> 
                        <tr> 
                            <td id="footer-pattern-text" class="mobile-resize-text" width="100%" style="padding: 0px; border-collapse: collapse; color: #999; font-size: 12px; line-height: 18px; font-family: Arial, sans-serif; mso-line-height-rule: exactly; mso-text-raise: 2px">
                                 This message was sent by Atlassian JIRA <span id="footer-build-information">(v6.3-OD-08-005-WN#6328-<span title="aae40f7178774ac0c2b0a349d29c88f14216faa1" data-commit-id="aae40f7178774ac0c2b0a349d29c88f14216faa1}">sha1:aae40f7</span>)</span> 
                            </td> 
                            <td id="footer-pattern-logo-desktop-container" valign="top" style="padding: 0px; border-collapse: collapse; padding-left: 20px; vertical-align: top"> 
                                <table style="border-collapse: collapse; mso-table-lspace: 0pt; mso-table-rspace: 0pt"> 
                                    <tr> 
                                        <td id="footer-pattern-logo-desktop-padding" style="padding: 0px; border-collapse: collapse; padding-top: 3px"> <img id="footer-pattern-logo-desktop" src="cid:jira-generated-image-static-footer-desktop-logo-c38f8018-8397-4a07-b721-934b7a4ebc48" alt="Atlassian logo" title="Atlassian logo" width="169" height="36" class="image_fix" /> 
                                        </td> 
                                    </tr> 
                                </table> 
                            </td> 
                        </tr> 
                    </table> 
                </td> 
            </tr> 
        </table>   
    </body>
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