XF 1.2 Error reported by member

I had an astute member send this PM to me and although my forum is operating properly I thought I better run this by y'all anyway:

MyMember said:
At 12:07 Mountain time I got this message when I tried a New Posts click:

An exception occurred: Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2) in /home/woodbart/public_html/library/Zend/Db/Adapter/Mysqli.php on line 333

  1. Zend_Db_Adapter_Mysqli->_connect() in Zend/Db/Adapter/Abstract.php at line 315
  2. Zend_Db_Adapter_Abstract->getConnection() in XenForo/Application.php at line 684
  3. XenForo_Application->loadDb()
  4. call_user_func_array() in XenForo/Application.php at line 921
  5. XenForo_Application->lazyLoad() in XenForo/Application.php at line 952
  6. XenForo_Application::get() in XenForo/Application.php at line 1336
  7. XenForo_Application::getDb() in XenForo/Error.php at line 52
  8. XenForo_Error::unexpectedException() in XenForo/Application.php at line 363
  9. XenForo_Application::handleException()

I just hit return in the search bar again and it came back without any issue. Just thought I'd pass this along in case it happens again/to someone else/whatever.
Is this something to be concerned about?. Is it possible his search just fell into a micro second gap while I was throwing levers, I have been doing a lot in the ACP today although nothing i the admin log right within that time frame. . . . .