fix unstable tests (#5791)

ref #5095, ref #5708

tests/fullstack-test/mpp/mpp_fail.test

@@ -29,43 +29,43 @@ mysql> analyze table test.t
 ## exception before mpp register non root mpp task
 => DBGInvoke __enable_fail_point(exception_before_mpp_register_non_root_mpp_task)
 mysql> use test; set @@tidb_isolation_read_engines='tiflash'; set @@tidb_allow_mpp=1; select count(value), id from t group by id;
-ERROR 1105 (HY000) at line 1: DB::Exception: Fail point FailPoints::exception_before_mpp_register_non_root_mpp_task is triggered.
+{#REGEXP}.*Fail point FailPoints::exception_before_mpp_register_non_root_mpp_task is triggered.*
 => DBGInvoke __disable_fail_point(exception_before_mpp_register_non_root_mpp_task)
 
 ## exception before mpp register root mpp task
 => DBGInvoke __enable_fail_point(exception_before_mpp_register_root_mpp_task)
 mysql> use test; set @@tidb_isolation_read_engines='tiflash'; set @@tidb_allow_mpp=1; select count(value), id from t group by id;
-ERROR 1105 (HY000) at line 1: DB::Exception: Fail point FailPoints::exception_before_mpp_register_root_mpp_task is triggered.
+{#REGEXP}.*Fail point FailPoints::exception_before_mpp_register_root_mpp_task is triggered.*
 => DBGInvoke __disable_fail_point(exception_before_mpp_register_root_mpp_task)
 
 ## exception before mpp register tunnel for non root mpp task
 => DBGInvoke __enable_fail_point(exception_before_mpp_register_tunnel_for_non_root_mpp_task)
 mysql> use test; set @@tidb_isolation_read_engines='tiflash'; set @@tidb_allow_mpp=1; select count(value), id from t group by id;
-ERROR 1105 (HY000) at line 1: DB::Exception: Fail point FailPoints::exception_before_mpp_register_tunnel_for_non_root_mpp_task is triggered.
+{#REGEXP}.*Fail point FailPoints::exception_before_mpp_register_tunnel_for_non_root_mpp_task is triggered.*
 => DBGInvoke __disable_fail_point(exception_before_mpp_register_tunnel_for_non_root_mpp_task)
 
 ## exception before mpp register tunnel for root mpp task
 => DBGInvoke __enable_fail_point(exception_before_mpp_register_tunnel_for_root_mpp_task)
 mysql> use test; set @@tidb_isolation_read_engines='tiflash'; set @@tidb_allow_mpp=1; select count(value), id from t group by id;
-ERROR 1105 (HY000) at line 1: DB::Exception: Fail point FailPoints::exception_before_mpp_register_tunnel_for_root_mpp_task is triggered.
+{#REGEXP}.*Fail point FailPoints::exception_before_mpp_register_tunnel_for_root_mpp_task is triggered.*
 => DBGInvoke __disable_fail_point(exception_before_mpp_register_tunnel_for_root_mpp_task)
 
 ## exception during mpp register tunnel for non root mpp task
 => DBGInvoke __enable_fail_point(exception_during_mpp_register_tunnel_for_non_root_mpp_task)
 mysql> use test; set @@tidb_isolation_read_engines='tiflash'; set @@tidb_allow_mpp=1; select count(value), id from t group by id;
-ERROR 1105 (HY000) at line 1: DB::Exception: Fail point FailPoints::exception_during_mpp_register_tunnel_for_non_root_mpp_task is triggered.
+{#REGEXP}.*Fail point FailPoints::exception_during_mpp_register_tunnel_for_non_root_mpp_task is triggered.*
 => DBGInvoke __disable_fail_point(exception_during_mpp_register_tunnel_for_non_root_mpp_task)
 
 ## exception before mpp run non root task
 => DBGInvoke __enable_fail_point(exception_before_mpp_non_root_task_run)
 mysql> use test; set @@tidb_isolation_read_engines='tiflash'; set @@tidb_allow_mpp=1; select count(value), id from t group by id;
-ERROR 1105 (HY000) at line 1: DB::Exception: Fail point FailPoints::exception_before_mpp_non_root_task_run is triggered.
+{#REGEXP}.*Fail point FailPoints::exception_before_mpp_non_root_task_run is triggered.*
 => DBGInvoke __disable_fail_point(exception_before_mpp_non_root_task_run)
 
 ## exception before mpp run root task
 => DBGInvoke __enable_fail_point(exception_before_mpp_root_task_run)
 mysql> use test; set @@tidb_isolation_read_engines='tiflash'; set @@tidb_allow_mpp=1; select count(value), id from t group by id;
-ERROR 1105 (HY000) at line 1: DB::Exception: Fail point FailPoints::exception_before_mpp_root_task_run is triggered.
+{#REGEXP}.*Fail point FailPoints::exception_before_mpp_root_task_run is triggered.*
 => DBGInvoke __disable_fail_point(exception_before_mpp_root_task_run)
 
 ## exception during mpp run non root task