DB Error: MySQL server has gone away

Stack Trace:

File: /srv/openjournal/sitios/acimed.sld.cu/lib/pkp/classes/db/DAO.inc.php line 554
Function: DAO->retrieve("SELECT * FROM external_feed_settings WHERE feed_id = ?", Array(1))

File: /srv/openjournal/sitios/acimed.sld.cu/plugins/generic/externalFeed/ExternalFeedDAO.inc.php line 85
Function: DAO->getDataObjectSettings("external_feed_settings", "feed_id", "2", Object(ExternalFeed))

File: /srv/openjournal/sitios/acimed.sld.cu/lib/pkp/classes/db/DAOResultFactory.inc.php line 103
Function: ExternalFeedDAO->_returnExternalFeedFromRow(Array(8))

File: /srv/openjournal/sitios/acimed.sld.cu/plugins/generic/externalFeed/ExternalFeedBlockPlugin.inc.php line 94
Function: DAOResultFactory->next()

File: /srv/openjournal/sitios/acimed.sld.cu/lib/pkp/classes/plugins/BlockPlugin.inc.php line 161
Function: ExternalFeedBlockPlugin->getContents(Object(TemplateManager), Object(Request))

File: (unknown) line (unknown)
Function: BlockPlugin->callback("Templates::Common::RightSidebar", Array(3))

File: /srv/openjournal/sitios/acimed.sld.cu/lib/pkp/classes/plugins/HookRegistry.inc.php line 89
Function: call_user_func(Array(2), "Templates::Common::RightSidebar", Array(3))

File: /srv/openjournal/sitios/acimed.sld.cu/lib/pkp/classes/template/PKPTemplateManager.inc.php line 704
Function: HookRegistry->call("Templates::Common::RightSidebar", Array(3))

File: /srv/openjournal/sitios/acimed.sld.cu/cache/t_compile/%%35^350^3508C2FA%%header.tpl.php line 62
Function: PKPTemplateManager->smartyCallHook(Array(1), Object(TemplateManager))

File: /srv/openjournal/sitios/acimed.sld.cu/lib/pkp/lib/smarty/Smarty.class.php line 1869
Function: include("/srv/openjournal/sitios/acimed.sld.cu/cache/t_compile/%%35^350^3...")

File: /srv/openjournal/sitios/acimed.sld.cu/lib/pkp/classes/template/PKPTemplateManager.inc.php line 211
Function: Smarty->_smarty_include(Array(2))

File: /srv/openjournal/sitios/acimed.sld.cu/cache/t_compile/%%38^38D^38D7420B%%article.tpl.php line 6
Function: PKPTemplateManager->_smarty_include(Array(2))

File: /srv/openjournal/sitios/acimed.sld.cu/lib/pkp/lib/smarty/Smarty.class.php line 1256
Function: include("/srv/openjournal/sitios/acimed.sld.cu/cache/t_compile/%%38^38D^3...")

File: /srv/openjournal/sitios/acimed.sld.cu/lib/pkp/classes/template/PKPTemplateManager.inc.php line 296
Function: Smarty->fetch("article/article.tpl", Null, Null, True)

File: /srv/openjournal/sitios/acimed.sld.cu/lib/pkp/classes/template/PKPTemplateManager.inc.php line 347
Function: PKPTemplateManager->fetch("article/article.tpl", Null, Null, True)

File: /srv/openjournal/sitios/acimed.sld.cu/pages/article/ArticleHandler.inc.php line 226
Function: PKPTemplateManager->display("article/article.tpl")

File: (unknown) line (unknown)
Function: ArticleHandler->view(Array(1), Object(Request))

File: /srv/openjournal/sitios/acimed.sld.cu/lib/pkp/classes/core/PKPRouter.inc.php line 362
Function: call_user_func(Array(2), Array(1), Object(Request))

File: /srv/openjournal/sitios/acimed.sld.cu/lib/pkp/classes/core/PKPPageRouter.inc.php line 220
Function: PKPRouter->_authorizeInitializeAndCallRequest(Array(2), Object(Request), Array(1), False)

File: /srv/openjournal/sitios/acimed.sld.cu/lib/pkp/classes/core/Dispatcher.inc.php line 134
Function: PKPPageRouter->route(Object(Request))

File: /srv/openjournal/sitios/acimed.sld.cu/lib/pkp/classes/core/PKPApplication.inc.php line 178
Function: Dispatcher->dispatch(Object(Request))

File: /srv/openjournal/sitios/acimed.sld.cu/index.php line 64
Function: PKPApplication->execute()

DB Error: MySQL server has gone away

Stack Trace:

File: /srv/openjournal/sitios/acimed.sld.cu/lib/pkp/classes/session/SessionDAO.inc.php line 119
Function: DAO->update("UPDATE sessions SET user_id = ?, ip_address = ?, ...", Array(9))

File: /srv/openjournal/sitios/acimed.sld.cu/lib/pkp/classes/session/SessionManager.inc.php line 186
Function: SessionDAO->updateObject(Object(Session))

File: (unknown) line (unknown)
Function: SessionManager->write("id4rmrktpkho3r804rb7akoii5", "")

File: (unknown) line (unknown)
Function: session_write_close()