Thread 1 (Thread 0x7f30e4066700 (LWP 8619)):

#0  __pthread_kill (threadid=<optimized out>, signo=signo@entry=11) at ../sysdeps/unix/sysv/linux/pthread_kill.c:56

#1  0x0000558eb38e4337 in my_write_core (sig=sig@entry=11) at ./mysys/stacktrace.c:386

#2  0x0000558eb33f6f88 in handle_fatal_signal (sig=11) at ./sql/signal_handler.cc:355

#3  <signal handler called>

#4  wsrep_thd_query_state (thd=thd@entry=0x0) at ./sql/wsrep_mysqld.cc:2620

#5  0x0000558eb357f66c in bg_wsrep_kill_trx (void_arg=0x7f30c00317b0) at ./storage/innobase/handler/ha_innodb.cc:18949

#6  0x0000558eb320cda3 in handle_manager (arg=arg@entry=0x0) at ./sql/sql_manager.cc:112

#7  0x0000558eb389616b in pfs_spawn_thread (arg=0x558eb5f6edc8) at ./storage/perfschema/pfs.cc:1869

#8  0x00007f30e9dbffa3 in start_thread (arg=<optimized out>) at pthread_create.c:486

#9  0x00007f30e9cee4cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95