MDEV-18593 : galera.galera_gcache_recover_full_gcache: Test failure: galera_gcache_recover_full_gcache.test: assert_grep.inc failed

Grep only the fact that we need to fall back to SST.

Author: janlindstrom

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

@@ -17,10 +17,18 @@ connection node_2;
 Performing --wsrep-recover ...
 Using --wsrep-start-position when starting mysqld ...
 connection node_1;
+SELECT COUNT(*) FROM t1;
+COUNT(*)
+5
+connection node_2;
+SET SESSION wsrep_sync_wait = 15;
+SELECT COUNT(*) FROM t1;
+COUNT(*)
+5
 include/diff_servers.inc [servers=1 2]
 connection node_1;
 DROP TABLE t1;
 CALL mtr.add_suppression("Skipped GCache ring buffer recovery");
-include/assert_grep.inc [IST first seqno 2 not found from cache, falling back to SST]
+include/assert_grep.inc [not found from cache, falling back to SST]
 connection node_2;
 CALL mtr.add_suppression("Skipped GCache ring buffer recovery");

mysql-test/suite/galera/t/galera_gcache_recover_full_gcache.test

@@ -38,6 +38,12 @@ INSERT INTO t1 (f2) VALUES (REPEAT('x', 1024 * 1024 * 10));
 --source include/galera_wait_ready.inc
 --let $wait_condition = SELECT VARIABLE_VALUE = 2 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_size';
 
+SELECT COUNT(*) FROM t1;
+
+--connection node_2
+SET SESSION wsrep_sync_wait = 15;
+SELECT COUNT(*) FROM t1;
+
 --let $diff_servers = 1 2
 --source include/diff_servers.inc
 
@@ -48,8 +54,8 @@ DROP TABLE t1;
 CALL mtr.add_suppression("Skipped GCache ring buffer recovery");
 
 # Confirm that IST did not take place
---let $assert_text = IST first seqno 2 not found from cache, falling back to SST
---let $assert_select = IST first seqno 2 not found from cache, falling back to SST
+--let $assert_text = not found from cache, falling back to SST
+--let $assert_select = not found from cache, falling back to SST
 --let $assert_count = 1
 --let $assert_file = $MYSQLTEST_VARDIR/log/mysqld.1.err
 --let $assert_only_after = starting as process