refs codership/mysql-wsrep#31

- Removes useless call to wsrep_xid_init() in wsrep_apply_events().
  Transaction's xid is already initialized at that point.
- Adds call to wsrep_set_SE_checkpoint() for committing TOI events
  in the applier side.
- Includes test case that reproduced the issue.

mysql-test/suite/galera/r/mysql-wsrep#31.result

+CREATE TABLE t1 (f1 CHAR(255)) ENGINE=InnoDB;
+INSERT INTO t1 VALUES('test');
+CREATE DATABASE db;
+Shutting down server 2 ...
+Recovering server 2 ...
+Performing --wsrep-recover ...
+Restarting server ...
+Using --wsrep-start-position when starting mysqld ...
+DROP TABLE t1;
+DROP DATABASE db;

mysql-test/suite/galera/t/mysql-wsrep#31.test

+--source include/galera_cluster.inc
+--source include/have_innodb.inc
+
+--connection node_1
+
+CREATE TABLE t1 (f1 CHAR(255)) ENGINE=InnoDB;
+INSERT INTO t1 VALUES('test');
+CREATE DATABASE db;
+
+--connection node_2
+--let $expected_position_uuid = `SELECT VARIABLE_VALUE FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_local_state_uuid'`
+--let $expected_position_seqno = `SELECT VARIABLE_VALUE FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_last_committed'`
+
+--let $expected_position = $expected_position_uuid:$expected_position_seqno
+
+--echo Shutting down server 2 ...
+--source include/shutdown_mysqld.inc
+
+--echo Recovering server 2 ...
+--let $galera_wsrep_recover_server_id=2
+--source suite/galera/include/galera_wsrep_recover.inc
+
+if ($galera_wsrep_start_position != $expected_position)
+{
+  die(Expected position: $expected_position, found $galera_wsrep_start_position);
+}
+
+--echo Restarting server ...
+--source include/start_mysqld.inc
+
+--let $wait_condition = SELECT VARIABLE_VALUE = 2 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_size'
+--source include/wait_condition.inc
+--source include/galera_wait_ready.inc
+
+--connection node_1
+DROP TABLE t1;
+DROP DATABASE db;
+
+

sql/wsrep_applier.cc

@@ -150,9 +150,6 @@ static wsrep_cb_status_t wsrep_apply_events(THD*        thd,
     /* Use the original server id for logging. */
     thd->set_server_id(ev->server_id);
     thd->set_time();                            // time the query
-    wsrep_xid_init(&thd->transaction.xid_state.xid,
-                   thd->wsrep_trx_meta.gtid.uuid,
-                   thd->wsrep_trx_meta.gtid.seqno);
     thd->lex->current_select= 0;
     if (!ev->when)
     {
@@ -281,8 +278,7 @@ wsrep_cb_status_t wsrep_apply_cb(void* const             ctx,
   return rcode;
 }
 
-static wsrep_cb_status_t wsrep_commit(THD* const thd,
-                                      wsrep_seqno_t const global_seqno)
+static wsrep_cb_status_t wsrep_commit(THD* const thd)
 {
 #ifdef WSREP_PROC_INFO
   snprintf(thd->wsrep_info, sizeof(thd->wsrep_info) - 1,
@@ -301,7 +297,11 @@ static wsrep_cb_status_t wsrep_commit(THD* const thd,
 #ifdef GTID_SUPPORT
     thd->variables.gtid_next.set_automatic();
 #endif /* GTID_SUPPORT */
-    // TODO: mark snapshot with global_seqno.
+    if (thd->wsrep_apply_toi)
+    {
+      wsrep_set_SE_checkpoint(thd->wsrep_trx_meta.gtid.uuid,
+                              thd->wsrep_trx_meta.gtid.seqno);
+    }
   }
 
 #ifdef WSREP_PROC_INFO
@@ -315,8 +315,7 @@ static wsrep_cb_status_t wsrep_commit(THD* const thd,
   return rcode;
 }
 
-static wsrep_cb_status_t wsrep_rollback(THD* const thd,
-                                        wsrep_seqno_t const global_seqno)
+static wsrep_cb_status_t wsrep_rollback(THD* const thd)
 {
 #ifdef WSREP_PROC_INFO
   snprintf(thd->wsrep_info, sizeof(thd->wsrep_info) - 1,
@@ -353,9 +352,9 @@ wsrep_cb_status_t wsrep_commit_cb(void*         const     ctx,
   wsrep_cb_status_t rcode;
 
   if (commit)
-    rcode = wsrep_commit(thd, meta->gtid.seqno);
+    rcode = wsrep_commit(thd);
   else
-    rcode = wsrep_rollback(thd, meta->gtid.seqno);
+    rcode = wsrep_rollback(thd);
 
   wsrep_set_apply_format(thd, NULL);
   thd->mdl_context.release_transactional_locks();