diff --git a/mysql-test/suite/galera/r/galera_concurrent_ctas.result b/mysql-test/suite/galera/r/galera_concurrent_ctas.result
index 39c55277c52..933f1d2a98e 100644
--- a/mysql-test/suite/galera/r/galera_concurrent_ctas.result
+++ b/mysql-test/suite/galera/r/galera_concurrent_ctas.result
@@ -1,5 +1,30 @@
 connection node_2;
 connection node_1;
+connect node_1a, 127.0.0.1, root, , test, $NODE_MYPORT_1;
+connect node_1b, 127.0.0.1, root, , test, $NODE_MYPORT_1;
+connect node_2a, 127.0.0.1, root, , test, $NODE_MYPORT_2;
+connection node_1;
+SET DEBUG_SYNC = 'wsrep_create_table_as_select WAIT_FOR continue';
+CREATE table t1 as SELECT SLEEP(0.1);;
+connection node_1a;
+# Wait until CTAS is on debug sync point
+connection node_1b;
+SET SESSION wsrep_sync_wait = 0;
+SET GLOBAL debug_dbug = '+d,sync.wsrep_apply_cb';
+connection node_2;
+CREATE table t1 as SELECT SLEEP(0.2);;
+connection node_1b;
+SET SESSION debug_sync = 'now WAIT_FOR sync.wsrep_apply_cb_reached';
+# Signal first CTAS to continue and wait until CTAS has executed
+SET DEBUG_SYNC= 'now SIGNAL continue';
+SET GLOBAL debug_dbug= '';
+SET DEBUG_SYNC = 'now SIGNAL signal.wsrep_apply_cb';
+connection node_2a;
+connection node_1b;
+SET DEBUG_SYNC= 'RESET';
+connection node_2;
+connection node_1;
+DROP TABLE t1;
 disconnect node_2;
 disconnect node_1;
 # End of test
diff --git a/mysql-test/suite/galera/r/galera_sequences.result b/mysql-test/suite/galera/r/galera_sequences.result
index e696a707cdf..1a5219c2d45 100644
--- a/mysql-test/suite/galera/r/galera_sequences.result
+++ b/mysql-test/suite/galera/r/galera_sequences.result
@@ -31,7 +31,7 @@ select NEXT VALUE FOR Seq1_1;
 NEXT VALUE FOR Seq1_1
 1
 alter table Seq1_1 engine=myisam;
-ERROR 42000: This version of MariaDB doesn't yet support 'Galera cluster does support only InnoDB sequences'
+ERROR 42000: This version of MariaDB doesn't yet support 'non-InnoDB sequences in Galera cluster'
 select NEXT VALUE FOR Seq1_1;
 NEXT VALUE FOR Seq1_1
 2
@@ -156,7 +156,53 @@ a	b
 DROP TABLE t1;
 DROP SEQUENCE t;
 CREATE SEQUENCE t ENGINE=MYISAM;
-ERROR 42000: This version of MariaDB doesn't yet support 'Galera cluster does support only InnoDB sequences'
+ERROR 42000: This version of MariaDB doesn't yet support 'non-InnoDB sequences in Galera cluster'
+SHOW CREATE SEQUENCE t;
+ERROR 42S02: Table 'test.t' doesn't exist
+SHOW CREATE TABLE t;
+ERROR 42S02: Table 'test.t' doesn't exist
+connection node_2;
+SHOW CREATE SEQUENCE t;
+ERROR 42S02: Table 'test.t' doesn't exist
+SHOW CREATE TABLE t;
+ERROR 42S02: Table 'test.t' doesn't exist
+connection node_1;
+CREATE SEQUENCE t NOCACHE ENGINE=InnoDB;
+ALTER TABLE t ENGINE=MyISAM;
+ERROR 42000: This version of MariaDB doesn't yet support 'non-InnoDB sequences in Galera cluster'
+SHOW CREATE SEQUENCE t;
+Table	Create Table
+t	CREATE SEQUENCE `t` start with 1 minvalue 1 maxvalue 9223372036854775806 increment by 1 nocache nocycle ENGINE=InnoDB
+SHOW CREATE TABLE t;
+Table	Create Table
+t	CREATE TABLE `t` (
+  `next_not_cached_value` bigint(21) NOT NULL,
+  `minimum_value` bigint(21) NOT NULL,
+  `maximum_value` bigint(21) NOT NULL,
+  `start_value` bigint(21) NOT NULL COMMENT 'start value when sequences is created or value if RESTART is used',
+  `increment` bigint(21) NOT NULL COMMENT 'increment value',
+  `cache_size` bigint(21) unsigned NOT NULL,
+  `cycle_option` tinyint(1) unsigned NOT NULL COMMENT '0 if no cycles are allowed, 1 if the sequence should begin a new cycle when maximum_value is passed',
+  `cycle_count` bigint(21) NOT NULL COMMENT 'How many cycles have been done'
+) ENGINE=InnoDB SEQUENCE=1
+connection node_2;
+SHOW CREATE SEQUENCE t;
+Table	Create Table
+t	CREATE SEQUENCE `t` start with 1 minvalue 1 maxvalue 9223372036854775806 increment by 1 nocache nocycle ENGINE=InnoDB
+SHOW CREATE TABLE t;
+Table	Create Table
+t	CREATE TABLE `t` (
+  `next_not_cached_value` bigint(21) NOT NULL,
+  `minimum_value` bigint(21) NOT NULL,
+  `maximum_value` bigint(21) NOT NULL,
+  `start_value` bigint(21) NOT NULL COMMENT 'start value when sequences is created or value if RESTART is used',
+  `increment` bigint(21) NOT NULL COMMENT 'increment value',
+  `cache_size` bigint(21) unsigned NOT NULL,
+  `cycle_option` tinyint(1) unsigned NOT NULL COMMENT '0 if no cycles are allowed, 1 if the sequence should begin a new cycle when maximum_value is passed',
+  `cycle_count` bigint(21) NOT NULL COMMENT 'How many cycles have been done'
+) ENGINE=InnoDB SEQUENCE=1
+connection node_1;
+DROP SEQUENCE t;
 CREATE SEQUENCE t INCREMENT BY 1 NOCACHE ENGINE=INNODB;
 CREATE TABLE t1(a int not null primary key default nextval(t), b int) engine=innodb;
 connection node_2;
@@ -185,7 +231,7 @@ DROP TABLE t1;
 CREATE SEQUENCE t INCREMENT BY 0 NOCACHE ENGINE=INNODB;
 DROP SEQUENCE t;
 CREATE SEQUENCE t INCREMENT BY 1 CACHE=20 ENGINE=INNODB;
-ERROR 42000: This version of MariaDB doesn't yet support 'In Galera if you use CACHE you should set INCREMENT BY 0 to behave correctly in a cluster'
+ERROR 42000: This version of MariaDB doesn't yet support 'CACHE without INCREMENT BY 0 in Galera cluster'
 CREATE SEQUENCE t INCREMENT BY 0 CACHE=20 ENGINE=INNODB;
 CREATE TABLE t1(a int not null primary key default nextval(t), b int) engine=innodb;
 connection node_2;
@@ -201,9 +247,9 @@ DROP SEQUENCE t;
 DROP TABLE t1;
 CREATE SEQUENCE t INCREMENT BY 0 CACHE=20 ENGINE=INNODB;
 ALTER TABLE t ENGINE=MYISAM;
-ERROR 42000: This version of MariaDB doesn't yet support 'Galera cluster does support only InnoDB sequences'
+ERROR 42000: This version of MariaDB doesn't yet support 'non-InnoDB sequences in Galera cluster'
 ALTER SEQUENCE t INCREMENT BY 1 CACHE=10;
-ERROR 42000: This version of MariaDB doesn't yet support 'In Galera if you use CACHE you should set INCREMENT BY 0 to behave correctly in a cluster'
+ERROR 42000: This version of MariaDB doesn't yet support 'CACHE without INCREMENT BY 0 in Galera cluster'
 ALTER SEQUENCE t INCREMENT BY 1 NOCACHE;
 ALTER SEQUENCE t INCREMENT BY 0 NOCACHE;
 ALTER SEQUENCE t INCREMENT BY 0 CACHE=10;
diff --git a/mysql-test/suite/galera/t/galera_concurrent_ctas.test b/mysql-test/suite/galera/t/galera_concurrent_ctas.test
index 61038664b21..e22ac811c8b 100644
--- a/mysql-test/suite/galera/t/galera_concurrent_ctas.test
+++ b/mysql-test/suite/galera/t/galera_concurrent_ctas.test
@@ -1,56 +1,85 @@
 --source include/galera_cluster.inc
 --source include/big_test.inc
+--source include/have_debug_sync.inc
 
---write_file $MYSQLTEST_VARDIR/tmp/galera_concurrent.sql
-CREATE table t1 as SELECT SLEEP(0.1);
-DROP table t1;
-CREATE table t1 as SELECT SLEEP(0.1);
-DROP table t1;
-CREATE table t1 as SELECT SLEEP(0.1);
-DROP table t1;
-CREATE table t1 as SELECT SLEEP(0.1);
-DROP table t1;
-CREATE table t1 as SELECT SLEEP(0.1);
-DROP table t1;
-CREATE table t1 as SELECT SLEEP(0.1);
-DROP table t1;
-CREATE table t1 as SELECT SLEEP(0.1);
-DROP table t1;
-CREATE table t1 as SELECT SLEEP(0.1);
-DROP table t1;
-CREATE table t1 as SELECT SLEEP(0.2);
-CREATE table t2 as SELECT SLEEP(0.2);
-CREATE table t3 as SELECT SLEEP(0.2);
-CREATE table t4 as SELECT SLEEP(0.2);
-CREATE table t5 as SELECT SLEEP(0.2);
-CREATE table t6 as SELECT SLEEP(0.2);
-CREATE table t7 as SELECT SLEEP(0.2);
-CREATE table t8 as SELECT SLEEP(0.2);
-CREATE table t9 as SELECT SLEEP(0.2);
-DROP table t1;
-DROP table t2;
-DROP table t3;
-DROP table t4;
-DROP table t5;
-DROP table t6;
-DROP table t7;
-DROP table t8;
-DROP table t9;
-EOF
+#
+# To have real concurrent CTAS this test uses DEBUG_SYNC
+#
 
-let $run=10;
+--connect node_1a, 127.0.0.1, root, , test, $NODE_MYPORT_1
+--connect node_1b, 127.0.0.1, root, , test, $NODE_MYPORT_1
+--connect node_2a, 127.0.0.1, root, , test, $NODE_MYPORT_2
 
-while($run)
-{
-  --error 0,1
-  exec $MYSQL --user=root --host=127.0.0.1 --port=$NODE_MYPORT_1 test \
-         < $MYSQLTEST_VARDIR/tmp/galera_concurrent.sql & \
-       $MYSQL --user=root --host=127.0.0.1 --port=$NODE_MYPORT_2 test \
-         < $MYSQLTEST_VARDIR/tmp/galera_concurrent.sql;
-  dec $run;
-}
+--connection node_1
+#
+# Send CTAS it will block before open_tables call
+#
+SET DEBUG_SYNC = 'wsrep_create_table_as_select WAIT_FOR continue';
+--send CREATE table t1 as SELECT SLEEP(0.1);
+
+--connection node_1a
+#
+# Wait for CTAS to block
+#
+--echo # Wait until CTAS is on debug sync point
+--let $wait_condition = SELECT COUNT(*) = 1 FROM INFORMATION_SCHEMA.PROCESSLIST WHERE STATE = 'debug sync point: wsrep_create_table_as_select'
+--source include/wait_condition.inc
+
+--connection node_1b
+#
+# Block node_1 applier
+#
+SET SESSION wsrep_sync_wait = 0;
+SET GLOBAL debug_dbug = '+d,sync.wsrep_apply_cb';
+
+#
+# Send concurrent CTAS it will block on applier
+#
+--connection node_2
+--send CREATE table t1 as SELECT SLEEP(0.2);
+
+#
+# Wait until second CTAS is blocked
+#
+--connection node_1b
+SET SESSION debug_sync = 'now WAIT_FOR sync.wsrep_apply_cb_reached';
+
+--echo # Signal first CTAS to continue and wait until CTAS has executed
+SET DEBUG_SYNC= 'now SIGNAL continue';
+--let $wait_condition = SELECT COUNT(*) = 0 FROM INFORMATION_SCHEMA.PROCESSLIST WHERE STATE = 'Creating table	CREATE table t1 as SELECT SLEEP(0.1)'
+--source include/wait_condition.inc
+#
+# Release second CTAS and cleanup
+#
+SET GLOBAL debug_dbug= '';
+SET DEBUG_SYNC = 'now SIGNAL signal.wsrep_apply_cb';
+#
+# Wait until second CTAS continues
+#
+--let $wait_condition = SELECT COUNT(*) = 0 FROM INFORMATION_SCHEMA.PROCESSLIST WHERE STATE LIKE 'debug sync point: now%'
+--source include/wait_condition.inc
+#
+# Wait until second CTAS finishes
+#
+--connection node_2a
+--let $wait_condition = SELECT COUNT(*) = 0 FROM INFORMATION_SCHEMA.PROCESSLIST WHERE STATE = 'Creating table	CREATE table t1 as SELECT SLEEP(0.2)'
+--source include/wait_condition.inc
+#
+# Cleanup
+#
+--connection node_1b
+SET DEBUG_SYNC= 'RESET';
+#
+# Verify that at least one is successful
+#
+--connection node_2
+--reap
+
+--connection node_1
+--error 0,ER_TABLE_EXISTS_ERROR,ER_QUERY_INTERRUPTED
+--reap
+DROP TABLE t1;
 
---remove_file $MYSQLTEST_VARDIR/tmp/galera_concurrent.sql
 
 --source include/galera_end.inc
 --echo # End of test
diff --git a/mysql-test/suite/galera/t/galera_sequences.test b/mysql-test/suite/galera/t/galera_sequences.test
index 5c03ab973e0..53417055d7d 100644
--- a/mysql-test/suite/galera/t/galera_sequences.test
+++ b/mysql-test/suite/galera/t/galera_sequences.test
@@ -134,6 +134,31 @@ DROP SEQUENCE t;
 #
 --error ER_NOT_SUPPORTED_YET
 CREATE SEQUENCE t ENGINE=MYISAM;
+--error ER_NO_SUCH_TABLE
+SHOW CREATE SEQUENCE t;
+--error ER_NO_SUCH_TABLE
+SHOW CREATE TABLE t;
+
+--connection node_2
+# Verify that above MyISAM sequence does not replicate
+--error ER_NO_SUCH_TABLE
+SHOW CREATE SEQUENCE t;
+--error ER_NO_SUCH_TABLE
+SHOW CREATE TABLE t;
+
+--connection node_1
+CREATE SEQUENCE t NOCACHE ENGINE=InnoDB;
+--error ER_NOT_SUPPORTED_YET
+ALTER TABLE t ENGINE=MyISAM;
+SHOW CREATE SEQUENCE t;
+SHOW CREATE TABLE t;
+
+--connection node_2
+SHOW CREATE SEQUENCE t;
+SHOW CREATE TABLE t;
+
+--connection node_1
+DROP SEQUENCE t;
 CREATE SEQUENCE t INCREMENT BY 1 NOCACHE ENGINE=INNODB;
 CREATE TABLE t1(a int not null primary key default nextval(t), b int) engine=innodb;
 
@@ -164,15 +189,15 @@ SET SESSION wsrep_sync_wait=0;
 while ($count)
 {
 --connection node_1
---error 0,ER_LOCK_WAIT_TIMEOUT
+--error 0,ER_LOCK_WAIT_TIMEOUT,ER_LOCK_DEADLOCK
 INSERT INTO t1(b) values (1);
 --connection node_2
---error 0,ER_LOCK_WAIT_TIMEOUT
+--error 0,ER_LOCK_WAIT_TIMEOUT,ER_LOCK_DEADLOCK
 INSERT INTO t1(b) values (2);
---error 0,ER_LOCK_WAIT_TIMEOUT
+--error 0,ER_LOCK_WAIT_TIMEOUT,ER_LOCK_DEADLOCK
 INSERT INTO t1(b) values (2);
 --connection node_1
---error 0,ER_LOCK_WAIT_TIMEOUT
+--error 0,ER_LOCK_WAIT_TIMEOUT,ER_LOCK_DEADLOCK
 INSERT INTO t1(b) values (1);
 --dec $count
 }
@@ -222,15 +247,15 @@ SET SESSION wsrep_sync_wait=0;
 while ($count)
 {
 --connection node_1
---error 0,ER_LOCK_WAIT_TIMEOUT
+--error 0,ER_LOCK_WAIT_TIMEOUT,ER_LOCK_DEADLOCK
 INSERT INTO t1(b) values (1),(2),(3),(4),(5),(6),(7),(8),(9);
 --connection node_2
---error 0,ER_LOCK_WAIT_TIMEOUT
+--error 0,ER_LOCK_WAIT_TIMEOUT,ER_LOCK_DEADLOCK
 INSERT INTO t1(b) values (21),(22),(23),(24),(25),(26),(27),(28),(29);
---error 0,ER_LOCK_WAIT_TIMEOUT
+--error 0,ER_LOCK_WAIT_TIMEOUT,ER_LOCK_DEADLOCK
 INSERT INTO t1(b) values (21),(22),(23),(24),(25),(26),(27),(28),(29);
 --connection node_1
---error 0,ER_LOCK_WAIT_TIMEOUT
+--error 0,ER_LOCK_WAIT_TIMEOUT,ER_LOCK_DEADLOCK
 INSERT INTO t1(b) values (1),(2),(3),(4),(5),(6),(7),(8),(9);
 --dec $count
 }
diff --git a/sql/sql_alter.cc b/sql/sql_alter.cc
index cf44ed67120..f83f629a715 100644
--- a/sql/sql_alter.cc
+++ b/sql/sql_alter.cc
@@ -470,22 +470,12 @@ bool Sql_cmd_alter_table::execute(THD *thd)
 
   if (check_grant(thd, priv_needed, first_table, FALSE, UINT_MAX, FALSE))
     DBUG_RETURN(TRUE);                  /* purecov: inspected */
+
 #ifdef WITH_WSREP
   if (WSREP(thd) &&
       (!thd->is_current_stmt_binlog_format_row() ||
        !thd->find_temporary_table(first_table)))
   {
-    wsrep::key_array keys;
-    wsrep_append_fk_parent_table(thd, first_table, &keys);
-
-    WSREP_TO_ISOLATION_BEGIN_ALTER((lex->name.str ? select_lex->db.str : NULL),
-                                   (lex->name.str ? lex->name.str : NULL),
-                                   first_table, &alter_info, &keys)
-    {
-      WSREP_WARN("ALTER TABLE isolation failure");
-      DBUG_RETURN(TRUE);
-    }
-
     /*
       It makes sense to set auto_increment_* to defaults in TOI operations.
       Must be done before wsrep_TOI_begin() since Query_log_event encapsulating
@@ -498,6 +488,19 @@ bool Sql_cmd_alter_table::execute(THD *thd)
       thd->variables.auto_increment_offset = 1;
       thd->variables.auto_increment_increment = 1;
     }
+
+    wsrep::key_array keys;
+    wsrep_append_fk_parent_table(thd, first_table, &keys);
+
+    WSREP_TO_ISOLATION_BEGIN_ALTER((lex->name.str ? select_lex->db.str : NULL),
+                                   (lex->name.str ? lex->name.str : NULL),
+                                   first_table, &alter_info, &keys)
+    {
+      WSREP_WARN("ALTER TABLE isolation failure");
+      DBUG_RETURN(TRUE);
+    }
+
+    DEBUG_SYNC(thd, "wsrep_alter_table_after_toi");
   }
 #endif
 
diff --git a/sql/sql_table.cc b/sql/sql_table.cc
index 6ffdea3b8cd..78a0aefc4f7 100644
--- a/sql/sql_table.cc
+++ b/sql/sql_table.cc
@@ -5339,12 +5339,15 @@ int mysql_create_table_no_lock(THD *thd, const LEX_CSTRING *db,
 
 @param thd    thread handle
 @param seq    sequence definition
-@retval 0     failure
-@retval 1     success
+@retval false success
+@retval true  failure
 */
 bool wsrep_check_sequence(THD* thd, const sequence_definition *seq)
 {
     enum legacy_db_type db_type;
+
+    DBUG_ASSERT(WSREP(thd));
+
     if (thd->lex->create_info.used_fields & HA_CREATE_USED_ENGINE)
     {
       db_type= thd->lex->create_info.db_type->db_type;
@@ -5359,7 +5362,7 @@ bool wsrep_check_sequence(THD* thd, const sequence_definition *seq)
     if (db_type != DB_TYPE_INNODB)
     {
       my_error(ER_NOT_SUPPORTED_YET, MYF(0),
-               "Galera cluster does support only InnoDB sequences");
+               "non-InnoDB sequences in Galera cluster");
       return(true);
     }
 
@@ -5370,8 +5373,7 @@ bool wsrep_check_sequence(THD* thd, const sequence_definition *seq)
         seq->cache)
     {
       my_error(ER_NOT_SUPPORTED_YET, MYF(0),
-               "In Galera if you use CACHE you should set INCREMENT BY 0"
-	       " to behave correctly in a cluster");
+               "CACHE without INCREMENT BY 0 in Galera cluster");
       return(true);
     }
 
@@ -9780,6 +9782,15 @@ bool mysql_alter_table(THD *thd, const LEX_CSTRING *new_db,
 
   TABLE *table= table_list->table;
   bool versioned= table && table->versioned();
+#ifdef WITH_WSREP
+  /*
+    If this ALTER TABLE is actually SEQUENCE we need to check
+    if we can support implementing storage engine.
+  */
+  if (WSREP(thd) && table && table->s->sequence &&
+      wsrep_check_sequence(thd, thd->lex->create_info.seq_create_info))
+    DBUG_RETURN(TRUE);
+#endif /* WITH_WSREP */
 
   if (versioned)
   {
@@ -11797,6 +11808,8 @@ bool Sql_cmd_create_table_like::execute(THD *thd)
       /* Store reference to table in case of LOCK TABLES */
       create_info.table= create_table->table;
 
+      DEBUG_SYNC(thd, "wsrep_create_table_as_select");
+
       /*
         select_create is currently not re-execution friendly and
         needs to be created for every execution of a PS/SP.
@@ -11855,6 +11868,10 @@ bool Sql_cmd_create_table_like::execute(THD *thd)
              !create_info.tmp_table()))
         {
 #ifdef WITH_WSREP
+          if (thd->lex->sql_command == SQLCOM_CREATE_SEQUENCE &&
+              wsrep_check_sequence(thd, lex->create_info.seq_create_info))
+            DBUG_RETURN(true);
+
           WSREP_TO_ISOLATION_BEGIN_ALTER(create_table->db.str, create_table->table_name.str,
                                          first_table, &alter_info, NULL)
           {