Merge branch '5.5-galera' into 10.0-galera

Author: Nirbhay Choubey

mysql-test/suite/galera/r/mdev_9290.result

@@ -0,0 +1,14 @@
+#
+# MDEV-9290 : InnoDB: Assertion failure in file trx0sys.cc line 353
+# InnoDB: Failing assertion: xid_seqno > trx_sys_cur_xid_seqno
+#
+CREATE TABLE t1 (i INT) ENGINE=InnoDB;
+START TRANSACTION;
+INSERT INTO t1 VALUES (1);
+INSERT INTO t1 VALUES (2);
+COMMIT;
+SELECT * FROM t1;
+i
+1
+2
+DROP TABLE t1;

mysql-test/suite/galera/t/galera_var_dirty_reads.test

@@ -5,6 +5,14 @@
 --source include/galera_cluster.inc
 --source include/have_innodb.inc
 
+--disable_query_log
+# Save original auto_increment_offset values.
+--connection node_1
+let $auto_increment_offset_node_1 = `SELECT @@global.auto_increment_offset`;
+--connection node_2
+let $auto_increment_offset_node_2 = `SELECT @@global.auto_increment_offset`;
+--enable_query_log
+
 --connection node_2
 --let $wsrep_cluster_address_saved = `SELECT @@global.wsrep_cluster_address`
 
@@ -41,6 +49,14 @@ SELECT * FROM t1;
 # Cleanup
 DROP TABLE t1;
 
+--disable_query_log
+# Restore original auto_increment_offset values.
+--connection node_1
+--eval SET @@global.auto_increment_offset = $auto_increment_offset_node_1;
+--connection node_2
+--eval SET @@global.auto_increment_offset = $auto_increment_offset_node_2;
+--enable_query_log
+
 --source include/galera_end.inc
 --echo # End of test
 

mysql-test/suite/galera/t/mdev_9290.test

@@ -0,0 +1,24 @@
+--source include/galera_cluster.inc
+--source include/have_innodb.inc
+
+--echo #
+--echo # MDEV-9290 : InnoDB: Assertion failure in file trx0sys.cc line 353
+--echo # InnoDB: Failing assertion: xid_seqno > trx_sys_cur_xid_seqno
+--echo #
+
+--connection node_1
+CREATE TABLE t1 (i INT) ENGINE=InnoDB;
+
+--connection node_2
+# Note: a multi-statement transaction should always be the "first" one to execute
+# on this node.
+START TRANSACTION;
+INSERT INTO t1 VALUES (1);
+INSERT INTO t1 VALUES (2);
+COMMIT;
+
+--connection node_1
+SELECT * FROM t1;
+DROP TABLE t1;
+
+--source include/galera_end.inc

sql/mysqld.cc

@@ -5140,10 +5140,20 @@ static int init_server_components()
         THD *current_thd_saved= current_thd;
         set_current_thd(tmp);
 
+        /*
+          Also save/restore server_status and variables.option_bits and they
+          get altered during init_for_queries().
+        */
+        unsigned int server_status_saved= tmp->server_status;
+        ulonglong option_bits_saved= tmp->variables.option_bits;
+
         tmp->init_for_queries();
 
         /* Restore current_thd. */
         set_current_thd(current_thd_saved);
+
+        tmp->server_status= server_status_saved;
+        tmp->variables.option_bits= option_bits_saved;
       }
     }
     mysql_mutex_unlock(&LOCK_thread_count);
@@ -5511,7 +5521,7 @@ pthread_handler_t start_wsrep_THD(void *arg)
   WSREP_ERROR("Failed to create/initialize system thread");
 
   /* Abort if its the first applier/rollbacker thread. */
-  if (wsrep_creating_startup_threads < 2)
+  if (wsrep_creating_startup_threads == 1)
     unireg_abort(1);
   else
     return NULL;