USE test;

SET SQL_MODE='';

SET @@GLOBAL.innodb_trx_rseg_n_slots_debug=1;

CREATE TABLE t (b VARCHAR(10) NOT NULL UNIQUE) ENGINE=InnoDB;

INSERT INTO t VALUES (12662),(54592);

SET GLOBAL innodb_monitor_enable='buffer_flush_batches';

INSERT INTO t VALUES (2822.75);

CREATE TABLE t2(a INT NOT NULL PRIMARY KEY, b INT) ENGINE=InnoDB SELECT * FROM t LOCK IN SHARE MODE;

INSERT INTO t VALUES (25215);

CREATE TEMPORARY TABLE m(a INT) ENGINE=INNODB;

SELECT SLEEP(5);

SELECT SLEEP(5);

# Then exit CLI, and shutdown using mysqladmin shutdown

2020-06-02 10:09:01 0 [Note] /test/MD260520-mariadb-10.5.4-linux-x86_64-dbg/bin/mysqld: ready for connections.

Version: '10.5.4-MariaDB-debug'  socket: '/test/MD260520-mariadb-10.5.4-linux-x86_64-dbg/socket.sock'  port: 13236  MariaDB Server

2020-06-02 10:09:16 4 [Warning] InnoDB: Cannot find a free slot for an undo log. Do you have too many active transactions running concurrently?

2020-06-02 10:09:16 4 [Warning] InnoDB: Unable to delete statistics for table test.t2: Too many concurrent transactions. They can be deleted later using DELETE FROM mysql.innodb_index_stats WHERE database_name = 'test' AND table_name = 't2'; DELETE FROM mysql.innodb_table_stats WHERE database_name = 'test' AND table_name = 't2';

2020-06-02 10:09:16 4 [Note] InnoDB: Deferring DROP TABLE `test`.`t2`; renaming to test/#sql-ib21

2020-06-02 10:09:16 4 [Warning] InnoDB: Cannot find a free slot for an undo log. Do you have too many active transactions running concurrently?

########################################

DEADLOCK of threads detected!

rw-lock 0x1553ab400ff8 --Thread 23449040844544 has waited at trx0rseg.ic line 44 for 0.00 seconds the semaphore:

X-lock on RW-latch at 0x1553ab400ff8 created in file buf0buf.cc line 1325

a writer (thread id 23449576269568) has reserved it in mode  exclusive

number of readers 0, waiters flag 1, lock_word: 0

Last time write locked in file trx0rseg.ic line 44

Locked: thread 23449576269568 file trx0rseg.ic line 44  X-LOCK

Locked: thread 23449576269568 file trx0rseg.ic line 44  X-LOCK

2020-06-02 10:09:26 4 [Note] InnoDB: Mutex 0x562fdc4be6c0 owned by thread 23449040844544 file /test/10.5_dbg/storage/innobase/dict/dict0stats.cc line 2434

--Thread 23449576269568 has waited at dict0dict.cc line 316 for 0.00 seconds the semaphore:

Mutex at 0x562fdc4be6c0, Mutex DICT_SYS created dict0dict.cc:1016, lock var 2

Last time reserved in file /test/10.5_dbg/storage/innobase/dict/dict0stats.cc line 2434

2020-06-02 10:09:26 4 [ERROR] [FATAL] InnoDB: ######################################## Deadlock Detected!

200602 10:09:26 [ERROR] mysqld got signal 6 ;

Core was generated by `/test/MD260520-mariadb-10.5.4-linux-x86_64-dbg/bin/mysqld --no-defaults --core-'.

Program terminated with signal SIGABRT, Aborted.

#0  __pthread_kill (threadid=<optimized out>, signo=signo@entry=6)

    at ../sysdeps/unix/sysv/linux/pthread_kill.c:57

[Current thread is 1 (Thread 0x154acf08f700 (LWP 76783))]

(gdb) bt

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

#1  0x0000558a24bbcd7a in my_write_core (sig=sig@entry=6) at /test/10.5_dbg/mysys/stacktrace.c:518

#2  0x0000558a24362385 in handle_fatal_signal (sig=6) at /test/10.5_dbg/sql/signal_handler.cc:330

#3  <signal handler called>

#4  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51

#5  0x0000154acd7d3801 in __GI_abort () at abort.c:79

#6  0x0000558a249795f6 in ib::fatal::~fatal (this=<optimized out>, __in_chrg=<optimized out>) at /test/10.5_dbg/storage/innobase/ut/ut0ut.cc:601

#7  0x0000558a249182e0 in sync_array_wait_event (arr=arr@entry=0x154acced3218, cell=@0x154acf08e738: 0x154accf810d8) at /test/10.5_dbg/storage/innobase/sync/sync0arr.cc:463

#8  0x0000558a2473edb8 in TTASEventMutex<GenericPolicy>::enter (line=<optimized out>, filename=<optimized out>, max_delay=<optimized out>, max_spins=60, this=<optimized out>) at /test/10.5_dbg/storage/innobase/include/ib0mutex.h:477

#9  PolicyMutex<TTASEventMutex<GenericPolicy> >::enter (this=0x558a2588a6c0 <dict_sys>, n_spins=30, n_delay=4, name=0x558a2506b0b0 "/test/10.5_dbg/storage/innobase/dict/dict0dict.cc", line=316) at /test/10.5_dbg/storage/innobase/include/ib0mutex.h:594

#10 0x0000558a24a4b007 in dict_table_close (table=0x154aac057098, dict_locked=dict_locked@entry=false, try_drop=try_drop@entry=false, thd=thd@entry=0x0, mdl=mdl@entry=0x0) at /test/10.5_dbg/storage/innobase/dict/dict0dict.cc:316

#11 0x0000558a24899ac0 in row_prebuilt_free (prebuilt=0x154aac17c098, dict_locked=dict_locked@entry=0) at /test/10.5_dbg/storage/innobase/row/row0mysql.cc:1041

#12 0x0000558a24711ad5 in ha_innobase::close (this=0x154aac1550a0) at /test/10.5_dbg/storage/innobase/handler/ha_innodb.cc:6171

#13 0x0000558a243695d8 in handler::ha_close (this=0x154aac1550a0) at /test/10.5_dbg/sql/handler.cc:2975

#14 0x0000558a241b957d in closefrm (table=table@entry=0x154aac173088) at /test/10.5_dbg/sql/table.cc:4271

#15 0x0000558a242c806d in THD::close_temporary_table (this=this@entry=0x154aac015088, table=table@entry=0x154aac173088) at /test/10.5_dbg/sql/temporary_tables.cc:1240

#16 0x0000558a242c8ca0 in THD::free_temporary_table (this=this@entry=0x154aac015088, table=table@entry=0x154aac173088) at /test/10.5_dbg/sql/temporary_tables.cc:1490

#17 0x0000558a242c8e00 in THD::close_temporary_tables (this=this@entry=0x154aac015088) at /test/10.5_dbg/sql/temporary_tables.cc:531

#18 0x0000558a2405603e in THD::cleanup (this=this@entry=0x154aac015088) at /test/10.5_dbg/sql/sql_class.cc:1543

#19 0x0000558a23fb4c6b in unlink_thd (thd=0x154aac015088) at /test/10.5_dbg/sql/mysqld.cc:2600

#20 0x0000558a2420ac98 in do_handle_one_connection (connect=<optimized out>, connect@entry=0x154aadc453a8, put_in_cache=put_in_cache@entry=true) at /test/10.5_dbg/sql/sql_connect.cc:1422

#21 0x0000558a2420ae5b in handle_one_connection (arg=arg@entry=0x154aadc453a8) at /test/10.5_dbg/sql/sql_connect.cc:1313

#22 0x0000558a2466a14e in pfs_spawn_thread (arg=0x154accc45888) at /test/10.5_dbg/storage/perfschema/pfs.cc:2201

#23 0x0000154ace4b66db in start_thread (arg=0x154acf08f700) at pthread_create.c:463

#24 0x0000154acd8b488f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

2020-06-02 10:15:25 0 [Note] /test/MD260520-mariadb-10.4.14-linux-x86_64-dbg/bin/mysqld: ready for connections.

Version: '10.4.14-MariaDB-debug'  socket: '/test/MD260520-mariadb-10.4.14-linux-x86_64-dbg/socket.sock'  port: 14979  MariaDB Server

2020-06-02 10:15:26 9 [Note] InnoDB: Deferring DROP TABLE `test`.`t2`; renaming to test/#sql-ib21

2020-06-02 10:16:10 0 [Note] /test/MD260520-mariadb-10.4.14-linux-x86_64-dbg/bin/mysqld (initiated by: root[root] @ localhost []): Normal shutdown

2020-06-02 10:16:10 0 [Note] InnoDB: FTS optimize thread exiting.

2020-06-02 10:16:10 0 [Note] Event Scheduler: Purging the queue. 0 events

2020-06-02 10:16:11 0 [Note] InnoDB: Starting shutdown...

2020-06-02 10:16:11 0 [Note] InnoDB: Dumping buffer pool(s) to /test/MD260520-mariadb-10.4.14-linux-x86_64-dbg/data/ib_buffer_pool

2020-06-02 10:16:11 0 [Note] InnoDB: Buffer pool(s) dump completed at 200602 10:16:11

2020-06-02 10:16:12 0 [Note] InnoDB: Shutdown completed; log sequence number 76351; transaction id 64

2020-06-02 10:16:12 0 [Note] InnoDB: Removed temporary tablespace data file: "ibtmp1"

2020-06-02 10:16:12 0 [Note] /test/MD260520-mariadb-10.4.14-linux-x86_64-dbg/bin/mysqld: Shutdown complete