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-rw-r--r--mysql-test/suite/galera/r/MDEV-25389.result15
-rw-r--r--mysql-test/suite/galera/t/MDEV-25389.test13
2 files changed, 28 insertions, 0 deletions
diff --git a/mysql-test/suite/galera/r/MDEV-25389.result b/mysql-test/suite/galera/r/MDEV-25389.result
new file mode 100644
index 00000000000..9a142676d92
--- /dev/null
+++ b/mysql-test/suite/galera/r/MDEV-25389.result
@@ -0,0 +1,15 @@
+connection node_2;
+connection node_1;
+connection node_2;
+call mtr.add_suppression("WSREP: Failed to create/initialize system thread");
+SET GLOBAL debug_dbug='+d,simulate_failed_connection_1';
+SET GLOBAL wsrep_slave_threads=2;
+ERROR HY000: Incorrect arguments to SET
+SELECT @@wsrep_slave_threads;
+@@wsrep_slave_threads
+1
+SET GLOBAL debug_dbug='';
+SET GLOBAL wsrep_slave_threads=1;
+SELECT @@wsrep_slave_threads;
+@@wsrep_slave_threads
+1
diff --git a/mysql-test/suite/galera/t/MDEV-25389.test b/mysql-test/suite/galera/t/MDEV-25389.test
new file mode 100644
index 00000000000..dcb21ee6136
--- /dev/null
+++ b/mysql-test/suite/galera/t/MDEV-25389.test
@@ -0,0 +1,13 @@
+--source include/galera_cluster.inc
+--source include/have_debug.inc
+--source include/have_debug_sync.inc
+
+--connection node_2
+call mtr.add_suppression("WSREP: Failed to create/initialize system thread");
+SET GLOBAL debug_dbug='+d,simulate_failed_connection_1';
+--error ER_WRONG_ARGUMENTS
+SET GLOBAL wsrep_slave_threads=2;
+SELECT @@wsrep_slave_threads;
+SET GLOBAL debug_dbug='';
+SET GLOBAL wsrep_slave_threads=1;
+SELECT @@wsrep_slave_threads;