Followup r85776, per Aaron, add documentation showing reason why explicit creation...

diff --git a/includes/Block.php b/includes/Block.php
index 2ef8e5b..bc4c552 100644 (file)
--- a/includes/Block.php
+++ b/includes/Block.php
@@ -889,6 +889,8 @@ class Block {
         * Purge expired blocks from the ipblocks table
         */
        public static function purgeExpired() {
+               // https://bugzilla.wikimedia.org/show_bug.cgi?id=28485
+               // Create and use a new loadBalancer object, to prevent "1205: Lock wait timeout exceeded;"
                $lb = wfGetLBFactory()->newMainLB();
                $dbw = $lb->getConnection( DB_MASTER );