Prevent concurrent modifications of the same User objectPrevent concurrent modifications of the same User objecthttps://liferay.dev/en/c/message_boards/find_thread?p_l_id=119785294&threadId=1227128942026-04-09T13:58:50Z2026-04-09T13:58:50ZRE: Prevent concurrent modifications of the same User objectJamie Sammonshttps://liferay.dev/en/c/message_boards/find_message?p_l_id=119785294&messageId=1227487952024-07-01T20:35:55Z2024-07-01T20:35:54Z<p>Bug report created: https://liferay.atlassian.net/browse/LPD-30166</p>Jamie Sammons2024-07-01T20:35:54ZPrevent concurrent modifications of the same User objectJan Tošovskýhttps://liferay.dev/en/c/message_boards/find_message?p_l_id=119785294&messageId=1227128932024-06-18T10:35:16Z2024-06-18T10:35:14Z<p>When the User is signed in, the last login date is updated in DB.
However, in some scenarios, this can happen in multiple threads, and fail:</p>
<pre><code>2024-06-18 08:12:16.932 ERROR [ajp-nio-127.0.0.1-8009-exec-2085][MainServlet:543] null
com.liferay.portal.kernel.exception.SystemException: com.liferay.portal.kernel.dao.orm.ORMException: javax.persistence.OptimisticLockException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect) : [com.liferay.portal.model.impl.UserImpl#964101]</code></pre>
<ol>
<li>Enable the Remember Me option when logging into the portal</li>
<li>Open portal pages in multiple tabs</li>
<li>Close the browser</li>
<li>Open the browser. The tabs with portal pages are reloaded and each
performs auto-logging on behalf of the user (in fast pace). These
requests are processed in multiple threads and sometimes fail.</li>
</ol>
<p> </p>Jan Tošovský2024-06-18T10:35:14Z