perl gendata.pl --dsn=dbi:mysql:host=127.0.0.1:port=10455:user=root:database=test --spec=conf/runtime/alter_online.zz

perl gentest.pl --dsn=dbi:mysql:host=127.0.0.1:port=10455:user=root:database=test --grammar=conf/runtime/alter_online.yy --threads=32 --duration=30000 --queries=1000000000 &

perl gentest.pl --dsn=dbi:mysql:host=127.0.0.1:port=10153:user=root:database=test --grammar=conf/runtime/alter_online.yy --threads=32 --duration=30000 --queries=1000000000 &

perl gentest.pl --dsn=dbi:mysql:host=127.0.0.1:port=10547:user=root:database=test --grammar=conf/runtime/alter_online.yy --threads=32 --duration=30000 --queries=1000000000 &

mysqld: /test/mtest/11.3_dbg/sql/wsrep_mysqld.cc:3894: void wsrep_commit_empty(THD*, bool): Assertion `!wsrep_has_changes(thd) || (thd->lex->sql_command == SQLCOM_CREATE_TABLE && !thd->is_current_stmt_binlog_format_row()) || thd->wsrep_cs().transaction().state() == wsrep::transaction::s_aborted' failed.

#0  __pthread_kill (threadid=<optimized out>, signo=signo@entry=6) at ../sysdeps/unix/sysv/linux/pthread_kill.c:56

56	../sysdeps/unix/sysv/linux/pthread_kill.c: No such file or directory.

[Current thread is 1 (Thread 0x14849e0ca700 (LWP 1022450))]

(gdb) bt

#0  __pthread_kill (threadid=<optimized out>, signo=signo@entry=6) at ../sysdeps/unix/sysv/linux/pthread_kill.c:56

#1  0x0000557741158e0c in my_write_core (sig=sig@entry=6) at /test/mtest/11.3_dbg/mysys/stacktrace.c:424

#2  0x0000557740a4454a in handle_fatal_signal (sig=6) at /test/mtest/11.3_dbg/sql/signal_handler.cc:360

#3  <signal handler called>

#4  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50

#5  0x00001485065f6859 in __GI_abort () at abort.c:79

#6  0x00001485065f6729 in __assert_fail_base (fmt=0x14850678c588 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", 

    assertion=0x55774152c4d8 "!wsrep_has_changes(thd) || (thd->lex->sql_command == SQLCOM_CREATE_TABLE && !thd->is_current_stmt_binlog_format_row()) || thd->wsrep_cs().transaction().state() == wsrep::transaction::s_aborted", file=0x55774152b568 "/test/mtest/11.3_dbg/sql/wsrep_mysqld.cc", line=3894, function=<optimized out>) at assert.c:92

#7  0x0000148506607fd6 in __GI___assert_fail (

    assertion=assertion@entry=0x55774152c4d8 "!wsrep_has_changes(thd) || (thd->lex->sql_command == SQLCOM_CREATE_TABLE && !thd->is_current_stmt_binlog_format_row()) || thd->wsrep_cs().transaction().state() == wsrep::transaction::s_aborted", file=file@entry=0x55774152b568 "/test/mtest/11.3_dbg/sql/wsrep_mysqld.cc", line=line@entry=3894, function=function@entry=0x55774152c5a0 "void wsrep_commit_empty(THD*, bool)")

    at assert.c:101

#8  0x0000557740d074a9 in wsrep_commit_empty (thd=thd@entry=0x1484a8000d48, all=all@entry=true) at /test/mtest/11.3_dbg/wsrep-lib/include/wsrep/transaction.hpp:64

#9  0x0000557740a4a7d8 in ha_commit_trans (thd=thd@entry=0x1484a8000d48, all=all@entry=true) at /test/mtest/11.3_dbg/sql/handler.cc:1753

#10 0x00005577408bd8a9 in trans_commit_implicit (thd=thd@entry=0x1484a8000d48) at /test/mtest/11.3_dbg/sql/transaction.cc:329

#11 0x0000557740740e33 in mysql_execute_command (thd=thd@entry=0x1484a8000d48, is_called_from_prepared_stmt=is_called_from_prepared_stmt@entry=false) at /test/mtest/11.3_dbg/sql/sql_parse.cc:5863

#12 0x0000557740728c1c in mysql_parse (thd=thd@entry=0x1484a8000d48, rawbuf=rawbuf@entry=0x1484a8013350 "ALTER TABLE t1 ADD KEY idx ( col4(10) ) /* QNO 7 CON_ID 32 */", length=length@entry=61, 

    parser_state=parser_state@entry=0x14849e0c92c0) at /test/mtest/11.3_dbg/sql/sql_parse.cc:7748

#13 0x000055774072852d in wsrep_mysql_parse (thd=thd@entry=0x1484a8000d48, rawbuf=0x1484a8013350 "ALTER TABLE t1 ADD KEY idx ( col4(10) ) /* QNO 7 CON_ID 32 */", length=61, 

    parser_state=parser_state@entry=0x14849e0c92c0) at /test/mtest/11.3_dbg/sql/sql_parse.cc:7559

#14 0x00005577407364ef in dispatch_command (command=command@entry=COM_QUERY, thd=thd@entry=0x1484a8000d48, packet=packet@entry=0x1484a800afb9 "ALTER TABLE t1 ADD KEY idx ( col4(10) ) /* QNO 7 CON_ID 32 */ ", 

    packet_length=packet_length@entry=62, blocking=blocking@entry=true) at /test/mtest/11.3_dbg/sql/sql_class.h:1549

#15 0x00005577407389a2 in do_command (thd=0x1484a8000d48, blocking=blocking@entry=true) at /test/mtest/11.3_dbg/sql/sql_parse.cc:1406

#16 0x00005577408a8940 in do_handle_one_connection (connect=<optimized out>, connect@entry=0x557742bba8b8, put_in_cache=put_in_cache@entry=true) at /test/mtest/11.3_dbg/sql/sql_connect.cc:1418

#17 0x00005577408a8e12 in handle_one_connection (arg=0x557742bba8b8) at /test/mtest/11.3_dbg/sql/sql_connect.cc:1320

#18 0x0000148506b07609 in start_thread (arg=<optimized out>) at pthread_create.c:477

#19 0x00001485066f3133 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95