Assertion `m_lock_rows == RDB_LOCK_WRITE' failed in myrocks::ha_rocksdb::write_row upon concurrent CREATE TABLE and FLUSH TABLES WITH READ LOCK

INSTALL SONAME 'ha_rocksdb';

CREATE TABLE t1 (i INT) ENGINE=MyISAM;

INSERT INTO t1 VALUES (1),(2);

CREATE TABLE t2 (i INT) ENGINE=MyISAM;

INSERT INTO t2 VALUES (1),(2);

--connect (con1,localhost,root,,test)

--connection default

HANDLER t2 OPEN h;

--send

  CREATE TABLE t3 ENGINE=RocksDB SELECT 1 FROM t1 WHERE SLEEP(0.5) = 0;

--connection con1

SET lock_wait_timeout= 2;

FLUSH TABLES WITH READ LOCK;

# Cleanup

UNLOCK TABLES;

--disconnect con1

--connection default

--reap

DROP TABLE t1, t2, t3;

mysqld: /data/src/10.2/storage/rocksdb/ha_rocksdb.cc:8501: virtual int myrocks::ha_rocksdb::write_row(uchar*): Assertion `m_lock_rows == RDB_LOCK_WRITE' failed.

180409  1:53:36 [ERROR] mysqld got signal 6 ;

Thread 1 (Thread 0x7feb613f2700 (LWP 30573)):

#0  __pthread_kill (threadid=<optimized out>, signo=6) at ../sysdeps/unix/sysv/linux/pthread_kill.c:57

#1  0x000055fd9ab0e26a in my_write_core (sig=6) at /data/src/10.2/mysys/stacktrace.c:477

#2  0x000055fd9a3b15d6 in handle_fatal_signal (sig=6) at /data/src/10.2/sql/signal_handler.cc:305

#3  <signal handler called>

#4  0x00007feb6711cfcf in raise () from /lib/x86_64-linux-gnu/libc.so.6

#5  0x00007feb6711e3fa in abort () from /lib/x86_64-linux-gnu/libc.so.6

#6  0x00007feb67115e37 in __assert_fail_base () from /lib/x86_64-linux-gnu/libc.so.6

#7  0x00007feb67115ee2 in __assert_fail () from /lib/x86_64-linux-gnu/libc.so.6

#8  0x00007feb609f489b in myrocks::ha_rocksdb::write_row (this=0x7feb503814c8, buf=0x7feb50381cd8 "\377\001") at /data/src/10.2/storage/rocksdb/ha_rocksdb.cc:8501

#9  0x000055fd9a3c06f7 in handler::ha_write_row (this=0x7feb503814c8, buf=0x7feb50381cd8 "\377\001") at /data/src/10.2/sql/handler.cc:5971

#10 0x000055fd9a11e15e in write_record (thd=0x7feb50000b00, table=0x7feb503808c0, info=0x7feb50013960) at /data/src/10.2/sql/sql_insert.cc:1929

#11 0x000055fd9a123207 in select_insert::send_data (this=0x7feb50013920, values=...) at /data/src/10.2/sql/sql_insert.cc:3757

#12 0x000055fd9a1b2d0e in end_send (join=0x7feb50013a18, join_tab=0x7feb50015e90, end_of_records=false) at /data/src/10.2/sql/sql_select.cc:19859

#13 0x000055fd9a1b07ea in evaluate_join_record (join=0x7feb50013a18, join_tab=0x7feb50015ae0, error=0) at /data/src/10.2/sql/sql_select.cc:18911

#14 0x000055fd9a1b028e in sub_select (join=0x7feb50013a18, join_tab=0x7feb50015ae0, end_of_records=false) at /data/src/10.2/sql/sql_select.cc:18730

#15 0x000055fd9a1af68d in do_select (join=0x7feb50013a18, procedure=0x0) at /data/src/10.2/sql/sql_select.cc:18235

#16 0x000055fd9a189d8f in JOIN::exec_inner (this=0x7feb50013a18) at /data/src/10.2/sql/sql_select.cc:3566

#17 0x000055fd9a18923c in JOIN::exec (this=0x7feb50013a18) at /data/src/10.2/sql/sql_select.cc:3361

#18 0x000055fd9a18a407 in mysql_select (thd=0x7feb50000b00, tables=0x7feb50012d30, wild_num=0, fields=..., conds=0x7feb500135c8, og_num=0, order=0x0, group=0x0, having=0x0, proc_param=0x0, select_options=2416184064, result=0x7feb50013920, unit=0x7feb500046a8, select_lex=0x7feb50004de0) at /data/src/10.2/sql/sql_select.cc:3761

#19 0x000055fd9a17ea4e in handle_select (thd=0x7feb50000b00, lex=0x7feb500045e0, result=0x7feb50013920, setup_tables_done_option=0) at /data/src/10.2/sql/sql_select.cc:376

#20 0x000055fd9a141b2a in mysql_execute_command (thd=0x7feb50000b00) at /data/src/10.2/sql/sql_parse.cc:3948

#21 0x000055fd9a14e252 in mysql_parse (thd=0x7feb50000b00, rawbuf=0x7feb500124f8 "CREATE TABLE t3 ENGINE=RocksDB SELECT 1 FROM t1 WHERE SLEEP(0.5) = 0", length=68, parser_state=0x7feb613f1200, is_com_multi=false, is_next_command=false) at /data/src/10.2/sql/sql_parse.cc:7914

#22 0x000055fd9a13c10d in dispatch_command (command=COM_QUERY, thd=0x7feb50000b00, packet=0x7feb50147241 "CREATE TABLE t3 ENGINE=RocksDB SELECT 1 FROM t1 WHERE SLEEP(0.5) = 0", packet_length=68, is_com_multi=false, is_next_command=false) at /data/src/10.2/sql/sql_parse.cc:1815

#23 0x000055fd9a13aa70 in do_command (thd=0x7feb50000b00) at /data/src/10.2/sql/sql_parse.cc:1369

#24 0x000055fd9a2893bc in do_handle_one_connection (connect=0x55fd9db71130) at /data/src/10.2/sql/sql_connect.cc:1335

#25 0x000055fd9a289149 in handle_one_connection (arg=0x55fd9db71130) at /data/src/10.2/sql/sql_connect.cc:1241

#26 0x000055fd9a6a9326 in pfs_spawn_thread (arg=0x55fd9dad0010) at /data/src/10.2/storage/perfschema/pfs.cc:1862

#27 0x00007feb68dec494 in start_thread (arg=0x7feb613f2700) at pthread_create.c:333

#28 0x00007feb671d293f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 3 (Thread 0x7feb600be700 (LWP 30597)):

#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225

#1  0x000055fd9ab13ac7 in safe_cond_timedwait (cond=0x7feb2c000cd8, mp=0x7feb2c000c28, abstime=0x7feb600bc2c0, file=0x55fd9abff440 "/data/src/10.2/include/mysql/psi/mysql_thread.h", line=1175) at /data/src/10.2/mysys/thr_mutex.c:545

#2  0x000055fd9a292f06 in inline_mysql_cond_timedwait (that=0x7feb2c000cd8, mutex=0x7feb2c000c28, abstime=0x7feb600bc2c0, src_file=0x55fd9abff6ba "/data/src/10.2/sql/mdl.cc", src_line=1092) at /data/src/10.2/include/mysql/psi/mysql_thread.h:1175

#3  0x000055fd9a2942b9 in MDL_wait::timed_wait (this=0x7feb2c000c28, owner=0x7feb2c000bd8, abs_timeout=0x7feb600bc2c0, set_status_on_timeout=true, wait_state_name=0x55fd9b4e2c80 <MDL_key::m_namespace_to_wait_state_name>) at /data/src/10.2/sql/mdl.cc:1092

#4  0x000055fd9a295fb3 in MDL_context::acquire_lock (this=0x7feb2c000c28, mdl_request=0x7feb600bc350, lock_wait_timeout=2) at /data/src/10.2/sql/mdl.cc:2162

#5  0x000055fd9a4cbee1 in Global_read_lock::lock_global_read_lock (this=0x7feb2c003f40, thd=0x7feb2c000b00) at /data/src/10.2/sql/lock.cc:1023

#6  0x000055fd9a2bef06 in reload_acl_and_cache (thd=0x7feb2c000b00, options=16388, tables=0x0, write_to_binlog=0x7feb600bc910) at /data/src/10.2/sql/sql_reload.cc:250

#7  0x000055fd9a146c1d in mysql_execute_command (thd=0x7feb2c000b00) at /data/src/10.2/sql/sql_parse.cc:5396

#8  0x000055fd9a14e252 in mysql_parse (thd=0x7feb2c000b00, rawbuf=0x7feb2c011138 "FLUSH TABLES WITH READ LOCK", length=27, parser_state=0x7feb600bd200, is_com_multi=false, is_next_command=false) at /data/src/10.2/sql/sql_parse.cc:7914

#9  0x000055fd9a13c10d in dispatch_command (command=COM_QUERY, thd=0x7feb2c000b00, packet=0x7feb2c008951 "FLUSH TABLES WITH READ LOCK", packet_length=27, is_com_multi=false, is_next_command=false) at /data/src/10.2/sql/sql_parse.cc:1815

#10 0x000055fd9a13aa70 in do_command (thd=0x7feb2c000b00) at /data/src/10.2/sql/sql_parse.cc:1369

#11 0x000055fd9a2893bc in do_handle_one_connection (connect=0x55fd9db6c8b0) at /data/src/10.2/sql/sql_connect.cc:1335

#12 0x000055fd9a289149 in handle_one_connection (arg=0x55fd9db6c8b0) at /data/src/10.2/sql/sql_connect.cc:1241

#13 0x000055fd9a6a9326 in pfs_spawn_thread (arg=0x55fd9dad0010) at /data/src/10.2/storage/perfschema/pfs.cc:1862

#14 0x00007feb68dec494 in start_thread (arg=0x7feb600be700) at pthread_create.c:333

#15 0x00007feb671d293f in clone () from /lib/x86_64-linux-gnu/libc.so.6