MDEV-19794 Spider crash with XA

storage/spider/mysql-test/spider/bugfix/include/xa_cmd_deinit.inc

+--let $MASTER_1_COMMENT_2_1= $MASTER_1_COMMENT_2_1_BACKUP
+--let $CHILD2_1_DROP_TABLES= $CHILD2_1_DROP_TABLES_BACKUP
+--let $CHILD2_1_CREATE_TABLES= $CHILD2_1_CREATE_TABLES_BACKUP
+--let $CHILD2_1_SELECT_TABLES= $CHILD2_1_SELECT_TABLES_BACKUP
+--disable_warnings
+--disable_query_log
+--disable_result_log
+--source ../t/test_deinit.inc
+--enable_result_log
+--enable_query_log
+--enable_warnings

storage/spider/mysql-test/spider/bugfix/include/xa_cmd_init.inc

+--disable_warnings
+--disable_query_log
+--disable_result_log
+--source ../t/test_init.inc
+--enable_result_log
+--enable_query_log
+--enable_warnings
+--let $MASTER_1_COMMENT_2_1_BACKUP= $MASTER_1_COMMENT_2_1
+let $MASTER_1_COMMENT_2_1=
+  COMMENT='table "tbl_a", srv "s_2_1"';
+--let $CHILD2_1_DROP_TABLES_BACKUP= $CHILD2_1_DROP_TABLES
+let $CHILD2_1_DROP_TABLES=
+  DROP TABLE IF EXISTS tbl_a;
+--let $CHILD2_1_CREATE_TABLES_BACKUP= $CHILD2_1_CREATE_TABLES
+let $CHILD2_1_CREATE_TABLES=
+  CREATE TABLE tbl_a (
+    pkey int NOT NULL,
+    PRIMARY KEY (pkey)
+  ) $CHILD2_1_ENGINE $CHILD2_1_CHARSET;
+--let $CHILD2_1_SELECT_TABLES_BACKUP= $CHILD2_1_SELECT_TABLES
+let $CHILD2_1_SELECT_TABLES=
+  SELECT pkey FROM tbl_a ORDER BY pkey;
+let $CHILD2_1_SELECT_ARGUMENT1=
+  SELECT argument FROM mysql.general_log WHERE argument LIKE '%insert %';

storage/spider/mysql-test/spider/bugfix/r/xa_cmd.result

+for master_1
+for child2
+child2_1
+child2_2
+child2_3
+for child3
+
+this test is for MDEV-19794
+
+drop and create databases
+connection master_1;
+CREATE DATABASE auto_test_local;
+USE auto_test_local;
+connection child2_1;
+SET @old_log_output = @@global.log_output;
+SET GLOBAL log_output = 'TABLE,FILE';
+CREATE DATABASE auto_test_remote;
+USE auto_test_remote;
+
+create table and insert
+connection child2_1;
+CHILD2_1_CREATE_TABLES
+TRUNCATE TABLE mysql.general_log;
+connection master_1;
+CREATE TABLE tbl_a (
+pkey int NOT NULL,
+PRIMARY KEY (pkey)
+) MASTER_1_ENGINE MASTER_1_CHARSET MASTER_1_COMMENT_2_1
+connection child2_1;
+TRUNCATE TABLE mysql.general_log;
+connection master_1;
+XA START 'test';
+INSERT INTO tbl_a (pkey) VALUES (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
+XA END 'test';
+XA PREPARE 'test';
+Warnings:
+Warning	1030	Got error 131 "Command not supported by the engine" from storage engine Aria
+XA COMMIT 'test';
+connection child2_1;
+SELECT argument FROM mysql.general_log WHERE argument LIKE '%insert %';
+argument
+insert into `auto_test_remote`.`tbl_a`(`pkey`)values(0),(1),(2),(3),(4),(5),(6),(7),(8),(9)
+SELECT argument FROM mysql.general_log WHERE argument LIKE '%insert %'
+SELECT pkey FROM tbl_a ORDER BY pkey;
+pkey
+0
+1
+2
+3
+4
+5
+6
+7
+8
+9
+
+deinit
+connection master_1;
+DROP DATABASE IF EXISTS auto_test_local;
+connection child2_1;
+DROP DATABASE IF EXISTS auto_test_remote;
+SET GLOBAL log_output = @old_log_output;
+for master_1
+for child2
+child2_1
+child2_2
+child2_3
+for child3
+
+end of test

storage/spider/mysql-test/spider/bugfix/t/xa_cmd.cnf

+!include include/default_mysqld.cnf
+!include ../my_1_1.cnf
+!include ../my_2_1.cnf

storage/spider/mysql-test/spider/bugfix/t/xa_cmd.test

+--source ../include/xa_cmd_init.inc
+--echo
+--echo this test is for MDEV-19794
+--echo
+--echo drop and create databases
+
+--connection master_1
+--disable_warnings
+CREATE DATABASE auto_test_local;
+USE auto_test_local;
+
+--connection child2_1
+SET @old_log_output = @@global.log_output;
+SET GLOBAL log_output = 'TABLE,FILE';
+CREATE DATABASE auto_test_remote;
+USE auto_test_remote;
+--enable_warnings
+
+--echo
+--echo create table and insert
+
+--connection child2_1
+--disable_query_log
+echo CHILD2_1_CREATE_TABLES;
+eval $CHILD2_1_CREATE_TABLES;
+--enable_query_log
+TRUNCATE TABLE mysql.general_log;
+
+--connection master_1
+--disable_query_log
+echo CREATE TABLE tbl_a (
+    pkey int NOT NULL,
+    PRIMARY KEY (pkey)
+) MASTER_1_ENGINE MASTER_1_CHARSET MASTER_1_COMMENT_2_1;
+eval CREATE TABLE tbl_a (
+    pkey int NOT NULL,
+    PRIMARY KEY (pkey)
+) $MASTER_1_ENGINE $MASTER_1_CHARSET $MASTER_1_COMMENT_2_1;
+--enable_query_log
+
+--connection child2_1
+TRUNCATE TABLE mysql.general_log;
+
+--connection master_1
+XA START 'test';
+INSERT INTO tbl_a (pkey) VALUES (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
+XA END 'test';
+XA PREPARE 'test';
+XA COMMIT 'test';
+
+--connection child2_1
+eval $CHILD2_1_SELECT_ARGUMENT1;
+eval $CHILD2_1_SELECT_TABLES;
+
+--echo
+--echo deinit
+--disable_warnings
+
+--connection master_1
+DROP DATABASE IF EXISTS auto_test_local;
+
+--connection child2_1
+DROP DATABASE IF EXISTS auto_test_remote;
+SET GLOBAL log_output = @old_log_output;
+
+--enable_warnings
+--source ../include/xa_cmd_deinit.inc
+--echo
+--echo end of test

storage/spider/spd_trx.cc

@@ -2294,7 +2294,10 @@ int spider_internal_xa_commit(
     spider_close_sys_table(thd, table_xa, &open_tables_backup, TRUE);
     table_xa_opened = FALSE;
   }
-  spider_xa_unlock(&trx->internal_xid_state);
+  if (trx->internal_xa)
+  {
+    spider_xa_unlock(&trx->internal_xid_state);
+  }
   DBUG_RETURN(0);
 
 error:
@@ -2304,7 +2307,10 @@ int spider_internal_xa_commit(
     spider_close_sys_table(thd, table_xa_member, &open_tables_backup, TRUE);
 error_in_commit:
 error_open_table:
-  spider_xa_unlock(&trx->internal_xid_state);
+  if (trx->internal_xa)
+  {
+    spider_xa_unlock(&trx->internal_xid_state);
+  }
   DBUG_RETURN(error_num);
 }
 
@@ -2530,7 +2536,10 @@ int spider_internal_xa_rollback(
     spider_close_sys_table(thd, table_xa, &open_tables_backup, TRUE);
     table_xa_opened = FALSE;
   }
-  spider_xa_unlock(&trx->internal_xid_state);
+  if (trx->internal_xa)
+  {
+    spider_xa_unlock(&trx->internal_xid_state);
+  }
   DBUG_RETURN(0);
 
 error:
@@ -2540,7 +2549,10 @@ int spider_internal_xa_rollback(
     spider_close_sys_table(thd, table_xa_member, &open_tables_backup, TRUE);
 error_in_rollback:
 error_open_table:
-  spider_xa_unlock(&trx->internal_xid_state);
+  if (trx->internal_xa)
+  {
+    spider_xa_unlock(&trx->internal_xid_state);
+  }
   DBUG_RETURN(error_num);
 }