I am running Drupal 6.22 and very occasionally (every few months) I get a White Screen on Death. (WSOD).
I find clearing the cache with "drush cc all" solves the problem, but what could be the route cause?
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Check the logs. WSOD almost always means a PHP error in your webserver's log. – ceejayoz May 16 '14 at 16:51
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No errors in the web server (apache) log files - This was the first thing I checked – user3645440 May 19 '14 at 14:49
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What about the Drupal database logs? – ceejayoz May 19 '14 at 14:50
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Nothing in the Drupal DB logs either (http://site-admin/admin/reports/dblog), EXCEPT the following - which is probably another issue. These occur constantly, even when there is no WSOD. Unknown column 'node_data_field_event_start.field_event_start_value' in 'where clause' query: SELECT DISTINCT node.nid AS nid, node.type AS node_type FROM node node INNER JOIN node_access na ON na.nid = node.nid WHERE (na.grant_view >= 1 AND ((na.gid = 0 AND – user3645440 May 19 '14 at 15:15