MDEV-21905: Galera test galera_var_notify_cmd causes hang

The problem is related to performing operations without switching
wsrep off, this commit fixes this and allows disabled tests.

mysql-test/std_data/wsrep_notify.sh

@@ -34,8 +34,10 @@ SCHEMA="mtr_wsrep_notify"
 MEMB_TABLE="$SCHEMA.membership"
 STATUS_TABLE="$SCHEMA.status"
 
-BEGIN="
-SET wsrep_on=0;
+WSREP_ON='SET wsrep_on=ON'
+WSREP_OFF='SET wsrep_on=OFF'
+
+BEGIN="$WSREP_OFF;
 CREATE SCHEMA IF NOT EXISTS $SCHEMA;
 CREATE TABLE IF NOT EXISTS $MEMB_TABLE (
     idx  INT,
@@ -50,9 +52,8 @@ CREATE TABLE IF NOT EXISTS $STATUS_TABLE (
     uuid   CHAR(40), /* cluster UUID */
     prim   BOOLEAN   /* if component is primary */
 ) ENGINE=MEMORY;
-BEGIN;
-"
-END="COMMIT;"
+BEGIN"
+END="COMMIT; $WSREP_ON"
 
 configuration_change()
 {
@@ -71,7 +72,7 @@ configuration_change()
 
     echo "INSERT INTO $STATUS_TABLE VALUES($idx, $INDEX, '$STATUS', '$CLUSTER_UUID', $PRIMARY);"
 
-    echo "$END"
+    echo "$END;"
 }
 
 status_update()
@@ -186,13 +187,13 @@ then
     fi
 fi
 
-case $STATUS in
-    "joined" | "donor" | "synced")
+case "$STATUS" in
+    'joined' | 'donor' | 'synced')
         "$COM" | eval "$CLIENT" -B "-u'$USER'"${PSWD:+" -p'$PSWD'"}\
                       "-h'$HOST'" "-P$PORT"$SSL_PARAM
         ;;
     *)
-        # The node might be shutting down
+        # The node might be shutting down or not initialized
         ;;
 esac
 

mysql-test/std_data/wsrep_notify_ssl.sh

@@ -34,8 +34,10 @@ SCHEMA="mtr_wsrep_notify"
 MEMB_TABLE="$SCHEMA.membership"
 STATUS_TABLE="$SCHEMA.status"
 
-BEGIN="
-SET wsrep_on=0;
+WSREP_ON='SET wsrep_on=ON'
+WSREP_OFF='SET wsrep_on=OFF'
+
+BEGIN="$WSREP_OFF;
 CREATE SCHEMA IF NOT EXISTS $SCHEMA;
 CREATE TABLE IF NOT EXISTS $MEMB_TABLE (
     idx  INT,
@@ -50,9 +52,8 @@ CREATE TABLE IF NOT EXISTS $STATUS_TABLE (
     uuid   CHAR(40), /* cluster UUID */
     prim   BOOLEAN   /* if component is primary */
 ) ENGINE=MEMORY;
-BEGIN;
-"
-END="COMMIT;"
+BEGIN"
+END="COMMIT; $WSREP_ON"
 
 configuration_change()
 {
@@ -71,12 +72,12 @@ configuration_change()
 
     echo "INSERT INTO $STATUS_TABLE VALUES($idx, $INDEX, '$STATUS', '$CLUSTER_UUID', $PRIMARY);"
 
-    echo "$END"
+    echo "$END;"
 }
 
 status_update()
 {
-    echo "SET wsrep_on=0; BEGIN; UPDATE $STATUS_TABLE SET status='$STATUS'; COMMIT;"
+    echo "$BEGIN; UPDATE $STATUS_TABLE SET status='$STATUS'; $END;"
 }
 
 trim_string()
@@ -186,10 +187,14 @@ then
     fi
 fi
 
-# Undefined means node is shutting down
-if [ "$STATUS" != 'Undefined' ]; then
-    "$COM" | eval "$CLIENT" -B "-u'$USER'"${PSWD:+" -p'$PSWD'"}\
-                               "-h'$HOST'" "-P$PORT"$SSL_PARAM
-fi
+case "$STATUS" in
+    'joined' | 'donor' | 'synced')
+        "$COM" | eval "$CLIENT" -B "-u'$USER'"${PSWD:+" -p'$PSWD'"}\
+                      "-h'$HOST'" "-P$PORT"$SSL_PARAM
+        ;;
+    *)
+        # The node might be shutting down or not initialized
+        ;;
+esac
 
 exit 0

mysql-test/suite/galera/disabled.def

@@ -23,11 +23,8 @@ galera_pc_recovery : MDEV-25199 cluster fails to start up
 galera_shutdown_nonprim : MDEV-21493 galera.galera_shutdown_nonprim
 galera_var_ignore_apply_errors : MDEV-26770 galera_var_ignore_apply_errors fails Server did not transition to READY state
 galera_var_node_address : MDEV-20485 Galera test failure
-galera_var_notify_cmd : MDEV-21905 Galera test galera_var_notify_cmd causes hang
-galera_var_notify_ssl_ipv6 : hangs after the merge of MDEV-27682
 galera_var_retry_autocommit: MDEV-18181 Galera test failure on galera.galera_var_retry_autocommit
 partition : MDEV-19958 Galera test failure on galera.partition
 query_cache: MDEV-15805 Test failure on galera.query_cache
 versioning_trx_id: MDEV-18590: galera.versioning_trx_id: Test failure: mysqltest: Result content mismatch
 galera_bf_abort_at_after_statement : Unstable
-

mysql-test/suite/galera/r/galera_var_notify_ssl_ipv6.result

+connection node_2;
+connection node_1;
 connection node_1;
 SELECT COUNT(DISTINCT uuid) AS EXPECT_2 FROM mtr_wsrep_notify.membership;
 EXPECT_2

support-files/wsrep_notify.sh

@@ -34,8 +34,10 @@ SCHEMA="wsrep"
 MEMB_TABLE="$SCHEMA.membership"
 STATUS_TABLE="$SCHEMA.status"
 
-BEGIN="
-SET wsrep_on=0;
+WSREP_ON='SET wsrep_on=ON'
+WSREP_OFF='SET wsrep_on=OFF'
+
+BEGIN="$WSREP_OFF;
 DROP SCHEMA IF EXISTS $SCHEMA; CREATE SCHEMA $SCHEMA;
 CREATE TABLE $MEMB_TABLE (
     idx  INT UNIQUE PRIMARY KEY,
@@ -50,9 +52,8 @@ CREATE TABLE $STATUS_TABLE (
     uuid   CHAR(40), /* cluster UUID */
     prim   BOOLEAN   /* if component is primary */
 ) ENGINE=MEMORY;
-BEGIN;
-"
-END="COMMIT;"
+BEGIN"
+END="COMMIT; $WSREP_ON"
 
 configuration_change()
 {
@@ -71,12 +72,12 @@ configuration_change()
 
     echo "INSERT INTO $STATUS_TABLE VALUES($idx, $INDEX, '$STATUS', '$CLUSTER_UUID', $PRIMARY);"
 
-    echo "$END"
+    echo "$END;"
 }
 
 status_update()
 {
-    echo "SET wsrep_on=0; BEGIN; UPDATE $STATUS_TABLE SET status='$STATUS'; COMMIT;"
+    echo "$WSREP_OFF; BEGIN; UPDATE $STATUS_TABLE SET status='$STATUS'; $END;"
 }
 
 trim_string()
@@ -186,10 +187,14 @@ then
     fi
 fi
 
-# Undefined means node is shutting down
-if [ "$STATUS" != 'Undefined' ]; then
-    "$COM" | eval "$CLIENT" -B "-u'$USER'"${PSWD:+" -p'$PSWD'"}\
-                               "-h'$HOST'" "-P$PORT"$SSL_PARAM
-fi
+case "$STATUS" in
+    'joined' | 'donor' | 'synced')
+        "$COM" | eval "$CLIENT" -B "-u'$USER'"${PSWD:+" -p'$PSWD'"}\
+                      "-h'$HOST'" "-P$PORT"$SSL_PARAM
+        ;;
+    *)
+        # The node might be shutting down or not initialized
+        ;;
+esac
 
 exit 0