Explicitely lock tables before doing message reservation queries, to avoid deadlocks.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@19538 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/CMFActivity/skins/activity/SQLDict_reserveMessageList.zsql

@@ -12,6 +12,8 @@ to_date
 limit
 group_method_id
 order_validation_text</params>
+LOCK TABLE message WRITE
+<dtml-var sql_delimiter>
 UPDATE
   message
 SET

product/CMFActivity/skins/activity/SQLQueue_reserveMessageList.zsql

@@ -11,6 +11,8 @@ class_file:
 to_date
 limit
 </params>
+LOCK TABLE message_queue WRITE
+<dtml-var sql_delimiter>
 UPDATE
   message_queue
 SET