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/* Changing the layout to use less space for mobiles */
@media screen and (max-device-width: 480px), screen and (-webkit-min-device-pixel-ratio: 2) {
#email-body { min-width: 30em !important; }
#email-page { padding: 8px !important; }
#email-banner { padding: 8px 8px 0 8px !important; }
#email-avatar { margin: 1px 8px 8px 0 !important; padding: 0 !important; }
#email-fields { padding: 0 8px 8px 8px !important; }
#email-gutter { width: 0 !important; }
}
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<td bgcolor="#3e4c4e" style="background-color:#3e4c4e;color:#ffffff;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;line-height:1;"><img src="https://www.jboss.org/dms/hibernate/images/jira/jiraheader_hibernate.png" alt="" style="vertical-align:top;" /></td>
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<img id="email-avatar" src="https://hibernate.onjira.com/secure/useravatar?ownerId=brmeyer&avatarId=11140" alt="" height="48" width="48" border="0" align="left" style="padding:0;margin: 0 16px 16px 0;" />
<div id="email-action" style="padding: 0 0 8px 0;font-size:12px;line-height:18px;">
<a class="user-hover" rel="brmeyer" id="email_brmeyer" href="https://hibernate.onjira.com/secure/ViewProfile.jspa?name=brmeyer" style="color:#6c797f;">Brett Meyer</a>
updated <img src="https://hibernate.onjira.com/images/icons/bug.gif" height="16" width="16" border="0" align="absmiddle" alt="Bug"> <a style='color:#6c797f;text-decoration:none;' href='https://hibernate.onjira.com/browse/HHH-7910'>HHH-7910</a>
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<div id="email-summary" style="font-size:16px;line-height:20px;padding:2px 0 16px 0;">
<a style='color:#6c797f;text-decoration:none;' href='https://hibernate.onjira.com/browse/HHH-7910'><strong>Transaction timeout can cause non-threadsafe session access by reaper thread</strong></a>
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<strong style="font-weight:normal;color:#505050;">Change By:</strong>
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<td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0 0 10px 0;width:100%;">
<a class="user-hover" rel="brmeyer" id="email_brmeyer" href="https://hibernate.onjira.com/secure/ViewProfile.jspa?name=brmeyer" style="color:#6c797f;">Brett Meyer</a>
(07/Jan/13 10:55 PM)
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<strong style="font-weight:normal;color:#505050;">Description:</strong>
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<span class="diffcontext">In a JTA & multi-threaded environment, a timed-out transaction can cause unsafe session access to occur internally in</span>
<span class="diffremovedchars" style="background-color:#ffe7e7;text-decoration:line-through;"> entitymanager</span>
<span class="diffaddedchars" style="background-color:#ddfade;"> ORM</span>
<span class="diffcontext">.<br><br>When AbstractEntityManagerImpl joins a transaction, it registers an "afterCompletionAction" coordinator. If the transaction</span>
<span class="diffremovedchars" style="background-color:#ffe7e7;text-decoration:line-through;"> was</span>
<span class="diffaddedchars" style="background-color:#ddfade;"> is</span>
<span class="diffcontext"> rolled back and the session is still open, the coordinator clears the session.<br><br>This causes problems in multi-threading within one transaction. If a thread is in the middle of an EntityManager#find, for example, and the transaction times out, a reaper thread will</span>
<span class="diffremovedchars" style="background-color:#ffe7e7;text-decoration:line-through;"> cause</span>
<span class="diffaddedchars" style="background-color:#ddfade;"> kick off</span>
<span class="diffcontext"> the afterCompletionAction and clear the session. Depending on timing, this removes the EntityEntry from the persistenceContext, prior to the fetch attempting to use it. This results in a "possible non-threadsafe access to the session" AssertionFailure.</span>
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