# gstack 17323
Thread 5 (Thread 0x7fc48f902700 (LWP 17324)):
#0  0x00007fc493a5ba35 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x000055ff41e75b25 in compress_worker_thread_func (arg=0x55ff459cbd08) at /usr/src/debug/MariaDB-10.4.26/src_0/extra/mariabackup/ds_compress.cc:413
#2  0x00007fc493a57ea5 in start_thread () from /lib64/libpthread.so.0
#3  0x00007fc492f72b0d in clone () from /lib64/libc.so.6
Thread 4 (Thread 0x7fc48f101700 (LWP 17325)):
#0  0x00007fc493a5ba35 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x000055ff41e75b25 in compress_worker_thread_func (arg=0x55ff459d4dd8) at /usr/src/debug/MariaDB-10.4.26/src_0/extra/mariabackup/ds_compress.cc:413
#2  0x00007fc493a57ea5 in start_thread () from /lib64/libpthread.so.0
#3  0x00007fc492f72b0d in clone () from /lib64/libc.so.6
Thread 3 (Thread 0x7fc48ddfe700 (LWP 17326)):
#0  0x00007fc493a5ba35 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x000055ff41e75e1b in compress_write (file=<optimized out>, buf=<optimized out>, len=<optimized out>) at /usr/src/debug/MariaDB-10.4.26/src_0/extra/mariabackup/ds_compress.cc:237
#2  0x000055ff41e66193 in xtrabackup_copy_log (last=false, end_lsn=<optimized out>, start_lsn=6606574080) at /usr/src/debug/MariaDB-10.4.26/src_0/extra/mariabackup/xtrabackup.cc:2961
#3  xtrabackup_copy_logfile (last=last@entry=false) at /usr/src/debug/MariaDB-10.4.26/src_0/extra/mariabackup/xtrabackup.cc:3013
#4  0x000055ff41e665cd in log_copying_thread () at /usr/src/debug/MariaDB-10.4.26/src_0/extra/mariabackup/xtrabackup.cc:3073
#5  0x00007fc493a57ea5 in start_thread () from /lib64/libpthread.so.0
#6  0x00007fc492f72b0d in clone () from /lib64/libc.so.6
Thread 2 (Thread 0x7fc48cdfc700 (LWP 17328)):
#0  0x00007fc493a5ba35 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x000055ff41e75e1b in compress_write (file=<optimized out>, buf=<optimized out>, len=<optimized out>) at /usr/src/debug/MariaDB-10.4.26/src_0/extra/mariabackup/ds_compress.cc:237
#2  0x000055ff41e79a70 in wf_wt_process (ctxt=<optimized out>, dstfile=<optimized out>) at /usr/src/debug/MariaDB-10.4.26/src_0/extra/mariabackup/write_filt.cc:215
#3  0x000055ff41e69b60 in xtrabackup_copy_datafile (node=node@entry=0x55ff45a5d2f0, thread_n=thread_n@entry=2, dest_name=dest_name@entry=0x0, write_filter=..., corrupted_pages=...) at /usr/src/debug/MariaDB-10.4.26/src_0/extra/mariabackup/xtrabackup.cc:2836
#4  0x000055ff41e69f11 in data_copy_thread_func (arg=0x55ff45a1f500) at /usr/src/debug/MariaDB-10.4.26/src_0/extra/mariabackup/xtrabackup.cc:3180
#5  0x00007fc493a57ea5 in start_thread () from /lib64/libpthread.so.0
#6  0x00007fc492f72b0d in clone () from /lib64/libc.so.6
Thread 1 (Thread 0x7fc494ff18c0 (LWP 17323)):
#0  0x00007fc493a5ee9d in nanosleep () from /lib64/libpthread.so.0
#1  0x000055ff4254a570 in os_thread_sleep (tm=tm@entry=1000000) at /usr/src/debug/MariaDB-10.4.26/src_0/storage/innobase/os/os0thread.cc:231
#2  0x000055ff41e6e23e in xtrabackup_backup_func () at /usr/src/debug/MariaDB-10.4.26/src_0/extra/mariabackup/xtrabackup.cc:4794
#3  main_low (argv=0x55ff45975610) at /usr/src/debug/MariaDB-10.4.26/src_0/extra/mariabackup/xtrabackup.cc:7059
#4  0x000055ff41e353bc in main (argc=11, argv=0x7ffd2240c2e8) at /usr/src/debug/MariaDB-10.4.26/src_0/extra/mariabackup/xtrabackup.cc:6861