relax the XA recovery error

it's just a suggestion anyway, not a bullet-proof check,
let's not act as if it is

mysql-test/suite/encryption/r/innodb-redo-nokeys.result

@@ -4,6 +4,7 @@ call mtr.add_suppression("InnoDB: Recovery cannot access file");
 call mtr.add_suppression("InnoDB: Plugin initialization aborted");
 call mtr.add_suppression("Plugin 'InnoDB' init function returned error\\.");
 call mtr.add_suppression("Plugin 'InnoDB' registration as a STORAGE ENGINE failed.");
+call mtr.add_suppression("Fewer engines are enabled now than were before the crash");
 call mtr.add_suppression("InnoDB: (Unable to apply log to|Discarding log for) corrupted page ");
 call mtr.add_suppression("InnoDB: Cannot apply log to \\[page id: space=[1-9][0-9]*, page number=0\\] of corrupted file '.*test.t[1-5]\\.ibd'");
 call mtr.add_suppression("InnoDB: Failed to read page .* from file '.*'");

mysql-test/suite/encryption/t/corrupted_during_recovery.test

@@ -10,6 +10,7 @@ call mtr.add_suppression("InnoDB: Failed to read page [123] from file '.*test.t1
 call mtr.add_suppression("InnoDB: The page \\[page id: space=\\d+, page number=3\\] in file '.*test.t1\\.ibd' cannot be decrypted");
 call mtr.add_suppression("InnoDB: Table in tablespace \\d+ encrypted. However key management plugin or used key_version \\d+ is not found or used encryption algorithm or method does not match. Can't continue opening the table.");
 call mtr.add_suppression("InnoDB: (Unable to apply log to|Discarding log for) corrupted page ");
+call mtr.add_suppression("Fewer engines are enabled now than were before the crash");
 --enable_query_log
 
 let INNODB_PAGE_SIZE=`select @@innodb_page_size`;

mysql-test/suite/encryption/t/innodb-redo-nokeys.test

@@ -9,6 +9,7 @@ call mtr.add_suppression("InnoDB: Recovery cannot access file");
 call mtr.add_suppression("InnoDB: Plugin initialization aborted");
 call mtr.add_suppression("Plugin 'InnoDB' init function returned error\\.");
 call mtr.add_suppression("Plugin 'InnoDB' registration as a STORAGE ENGINE failed.");
+call mtr.add_suppression("Fewer engines are enabled now than were before the crash");
 call mtr.add_suppression("InnoDB: (Unable to apply log to|Discarding log for) corrupted page ");
 call mtr.add_suppression("InnoDB: Cannot apply log to \\[page id: space=[1-9][0-9]*, page number=0\\] of corrupted file '.*test.t[1-5]\\.ibd'");
 call mtr.add_suppression("InnoDB: Failed to read page .* from file '.*'");

mysql-test/suite/innodb/r/encryption_threads_shutdown.result

@@ -2,6 +2,7 @@ call mtr.add_suppression("Creating system tablespace with existing redo log file
 call mtr.add_suppression("InnoDB: Database creation was aborted");
 call mtr.add_suppression("Plugin 'InnoDB' init function returned error.");
 call mtr.add_suppression("Plugin 'InnoDB' registration as a STORAGE ENGINE failed.");
+call mtr.add_suppression("Fewer engines are enabled now than were before the crash");
 CREATE TABLE t(a INT) ENGINE=InnoDB;
 # Kill the server
 # restart

mysql-test/suite/innodb/r/log_file_overwrite.result

@@ -1,4 +1,5 @@
 call mtr.add_suppression("InnoDB: Plugin initialization aborted");
+call mtr.add_suppression("Fewer engines are enabled now than were before the crash");
 call mtr.add_suppression("plugin 'InnoDB' registration as a STORAGE ENGINE failed.");
 CREATE TABLE t1(f1 INT NOT NULL, f2 TEXT)ENGINE=InnoDB;
 # restart: --debug_dbug=+d,ib_log_checkpoint_avoid_hard --innodb_flush_sync=0

mysql-test/suite/innodb/r/recovery_memory.result

@@ -2,6 +2,7 @@ call mtr.add_suppression("InnoDB: The change buffer is corrupted");
 call mtr.add_suppression("InnoDB: Plugin initialization aborted at srv0start.cc");
 call mtr.add_suppression("Plugin 'InnoDB' init function returned error");
 call mtr.add_suppression("Plugin 'InnoDB' registration as a STORAGE ENGINE failed.");
+call mtr.add_suppression("Fewer engines are enabled now than were before the crash");
 CREATE TABLE t1(c TEXT, KEY(c(3072)))ENGINE=InnoDB CHARSET=latin1;
 CREATE PROCEDURE dorepeat()
 LOOP

mysql-test/suite/innodb/t/alter_kill.test

@@ -21,6 +21,7 @@ call mtr.add_suppression("InnoDB: Tablespace .* was not found at.*bug16735660");
 call mtr.add_suppression("InnoDB: Plugin initialization aborted*");
 call mtr.add_suppression("Plugin 'InnoDB' init function returned error.");
 call mtr.add_suppression("Plugin 'InnoDB' registration as a STORAGE ENGINE failed.");
+call mtr.add_suppression("Fewer engines are enabled now than were before the crash");
 call mtr.add_suppression("Table .*bug16720368.* is corrupted");
 -- enable_query_log
 

mysql-test/suite/innodb/t/corrupted_during_recovery.test

@@ -10,6 +10,7 @@ call mtr.add_suppression("InnoDB: (Unable to apply log to|Discarding log for) co
 call mtr.add_suppression("Table `test`.`t1` is corrupted. Please drop the table and recreate.");
 call mtr.add_suppression("InnoDB: File '.*test/t1\\.ibd' is corrupted");
 call mtr.add_suppression("InnoDB: A long wait .* was observed for dict_sys");
+call mtr.add_suppression("Fewer engines are enabled now than were before the crash");
 --enable_query_log
 
 let INNODB_PAGE_SIZE=`select @@innodb_page_size`;

mysql-test/suite/innodb/t/encryption_threads_shutdown.test

@@ -6,6 +6,7 @@ call mtr.add_suppression("Creating system tablespace with existing redo log file
 call mtr.add_suppression("InnoDB: Database creation was aborted");
 call mtr.add_suppression("Plugin 'InnoDB' init function returned error.");
 call mtr.add_suppression("Plugin 'InnoDB' registration as a STORAGE ENGINE failed.");
+call mtr.add_suppression("Fewer engines are enabled now than were before the crash");
 
 --let $MYSQLD_DATADIR=`SELECT @@datadir`
 --let $DATA= $MYSQLD_DATADIR/ibdata1

mysql-test/suite/innodb/t/innodb-index.test

@@ -1235,6 +1235,7 @@ call mtr.add_suppression("InnoDB: Tablespace .* was not found at .*t[12].ibd.");
 call mtr.add_suppression("InnoDB: Plugin initialization aborted");
 call mtr.add_suppression("Plugin 'InnoDB' init function returned error");
 call mtr.add_suppression("Plugin 'InnoDB' registration as a STORAGE ENGINE failed");
+call mtr.add_suppression("Fewer engines are enabled now than were before the crash");
 
 --enable_query_log
 --source include/test_db_charset_restore.inc

mysql-test/suite/innodb/t/leaf_page_corrupted_during_recovery.test

@@ -7,6 +7,7 @@ call mtr.add_suppression("\\[ERROR\\] InnoDB: Failed to read page 19 from file '
 call mtr.add_suppression("InnoDB: (Unable to apply log to|Discarding log for) corrupted page .*, page number=19\\]");
 call mtr.add_suppression("\\[ERROR\\] InnoDB: Plugin initialization aborted at srv0start\\.cc.* with error Data structure corruption");
 call mtr.add_suppression("\\[ERROR\\] Plugin 'InnoDB' (init function|registration)");
+call mtr.add_suppression("Fewer engines are enabled now than were before the crash");
 call mtr.add_suppression("\\[ERROR\\] InnoDB: We detected index corruption");
 call mtr.add_suppression("\\[ERROR\\] (mysqld|mariadbd).*: Index for table 't1' is corrupt; try to repair it");
 call mtr.add_suppression("InnoDB: btr_pcur_open_low level: 0 table: `test`\\.`t1` index: `PRIMARY`");

mysql-test/suite/innodb/t/log_file_name.test

@@ -168,6 +168,7 @@ call mtr.add_suppression("InnoDB: Could not find a valid tablespace file for `te
 call mtr.add_suppression("InnoDB: Ignoring tablespace for test/u[1-3] because it could not be opened\\.");
 call mtr.add_suppression("InnoDB: Failed to find tablespace for table .* in the cache. Attempting to load the tablespace with space id");
 call mtr.add_suppression("InnoDB: Plugin initialization aborted");
+call mtr.add_suppression("Fewer engines are enabled now than were before the crash");
 call mtr.add_suppression("Plugin 'InnoDB' \(init function returned error\|registration as a STORAGE ENGINE failed\)");
 call mtr.add_suppression("InnoDB: Table test/u[123] in the InnoDB data dictionary has tablespace id [1-9][0-9]*, but tablespace with that id or name does not exist\\. Have you deleted or moved \\.ibd files\\?");
 call mtr.add_suppression("InnoDB: Cannot replay rename of tablespace.*");

mysql-test/suite/innodb/t/log_file_overwrite.test

@@ -3,6 +3,7 @@
 --source include/have_debug.inc
 
 call mtr.add_suppression("InnoDB: Plugin initialization aborted");
+call mtr.add_suppression("Fewer engines are enabled now than were before the crash");
 call mtr.add_suppression("plugin 'InnoDB' registration as a STORAGE ENGINE failed.");
 CREATE TABLE t1(f1 INT NOT NULL, f2 TEXT)ENGINE=InnoDB;
 let $restart_parameters=--debug_dbug=+d,ib_log_checkpoint_avoid_hard --innodb_flush_sync=0;

mysql-test/suite/innodb/t/log_file_size.test

@@ -11,6 +11,7 @@
 call mtr.add_suppression("syntax error in innodb_log_group_home_dir");
 call mtr.add_suppression("Plugin 'InnoDB' init function returned error");
 call mtr.add_suppression("Plugin 'InnoDB' registration as a STORAGE ENGINE failed");
+call mtr.add_suppression("Fewer engines are enabled now than were before the crash");
 call mtr.add_suppression("InnoDB: Plugin initialization aborted");
 call mtr.add_suppression("InnoDB: innodb_read_only prevents crash recovery");
 call mtr.add_suppression("InnoDB: Log file .*ib_logfile1.* size");

mysql-test/suite/innodb/t/recovery_memory.test

@@ -6,6 +6,7 @@ call mtr.add_suppression("InnoDB: The change buffer is corrupted");
 call mtr.add_suppression("InnoDB: Plugin initialization aborted at srv0start.cc");
 call mtr.add_suppression("Plugin 'InnoDB' init function returned error");
 call mtr.add_suppression("Plugin 'InnoDB' registration as a STORAGE ENGINE failed.");
+call mtr.add_suppression("Fewer engines are enabled now than were before the crash");
 CREATE TABLE t1(c TEXT, KEY(c(3072)))ENGINE=InnoDB CHARSET=latin1;
 DELIMITER |;
 

sql/log.cc

@@ -10857,11 +10857,8 @@ int TC_LOG_MMAP::recover()
     number of storage engines on startup
   */
   if (data[sizeof(tc_log_magic)] > total_ha_2pc)
-  {
+    sql_print_error("Fewer engines are enabled now than were before the crash. "
-    sql_print_error("Recovery failed! You must enable "
+                    "Recovery might be incomplete!");
-                    "all engines that were enabled at the moment of the crash");
-    goto err1;
-  }
 
   if (my_hash_init(PSI_INSTRUMENT_ME, &xids, &my_charset_bin,
                    tc_log_page_size/3, 0, sizeof(my_xid), 0, 0, MYF(0)))