- Patch #314358 by wonder95: only set ignore_slave_server if there are slave servers being used, which is assumed if there are more than one.

includes/database/database.inc

@@ -2431,6 +2431,24 @@ function _db_error_page($error = '') {
   drupal_set_title('Site offline');
 }
 
+ /**
+ * Helper function to get duration lag from variable
+ * and set the session variable that contains the lag.
+ */
+function db_ignore_slave() {
+  $connection_info = Database::getConnectionInfo();
+  // Only set ignore_slave_server if there are slave servers
+  // being used, which is assumed if there are more than one.    
+  if (count($connection_info) > 1) {
+    // Five minutes is long enough to allow the slave to break and resume
+    // interrupted replication without causing problems on the Drupal site
+    // from the old data.
+    $duration = variable_get('maximum_replication_lag', 300);
+    // Set session variable with amount of time to delay before using slave.
+    $_SESSION['ignore_slave_server'] = REQUEST_TIME + $duration;
+  }
+}
+
 /**
  * @ingroup database-legacy
  *
@@ -2644,20 +2662,6 @@ function db_rewrite_sql($query, $primary_table = 'n', $primary_field = 'nid',  $
   return $query;
 }
 
-/**
- * Helper function to get duration lag from variable
- * and set the session variable that contains the lag.
- */
-function db_ignore_slave() {
-  // Five minutes is long enough to allow the slave to break and resume
-  // interrupted replication without causing problems on the Drupal site
-  // from the old data.
-  $duration = variable_get('maximum_replication_lag', 300);
-  
-  // Set session variable with amount of time to delay  before using slave.
-  $_SESSION['ignore_slave_server'] = REQUEST_TIME + $duration;
-}
-
 /**
  * @} End of "ingroup database-legacy".
  */