title: MariaDB 10.2 mysql_install_db hangs
body: <p>I'm running MariaDB (10.2.13) in a docker container based on Alpine (<a href="https://github.com/wodby/mariadb" rel="nofollow noreferrer">https://github.com/wodby/mariadb</a>) and from time to time the initial start just hangs when running <code>/usr/bin/mysql_install_db</code>. I've found out that it hangs in function <code>mysqld_install_cmd_line</code> when running <code>mysqld</code> for the first time with <code>--bootstrap</code>. </p>
  
  <p>Any ideas what could it be? Didn't happen with MariaDB 10.2.11</p>
  
  <pre><code>+ mysql_install_db --datadir=/var/lib/mysql/ --rpm
  + basedir=
  + builddir=
  + ldata=/var/lib/mysql
  + langdir=
  + srcdir=
  + args=
  + defaults=
  + defaults_group_suffix=
  + mysqld_opt=
  + user=
  + silent_startup=--silent-startup
  + force=0
  + in_rpm=0
  + ip_only=0
  + cross_bootstrap=0
  + install_params=
  + auth_root_authentication_method=normal
  + auth_root_socket_user=root
  + parse_arguments --datadir=/var/lib/mysql/ --rpm
  + pick_args=
  + test --datadir=/var/lib/mysql/ = PICK-ARGS-FROM-ARGV
  + parse_arg --datadir=/var/lib/mysql/
  + echo --datadir=/var/lib/mysql/
  + sed -e s/^[^=]*=//
  + ldata=/var/lib/mysql/
  + in_rpm=1
  + test -n
  + test -n
  + test -n
  + print_defaults=/usr/bin/my_print_defaults
  + test ! -x /usr/bin/my_print_defaults
  + /usr/bin/my_print_defaults --mysqld mysql_install_db
  + parse_arguments --user=mysql --bind-address=0.0.0.0 --basedir=/usr --datadir=/var/lib/mysql --socket=/var/run/mysqld/mysqld.sock --log-warnings --collation-server=utf8_unicode_ci --init_connect=SET NAMES utf8 --character_set_server=utf8 --character_set_filesystem=utf8 --symbolic-links=0 --default_storage_engine=InnoDB --skip-character-set-client-handshake --skip-name-resolve --back_log=100 --join_buffer_size=8M --max_heap_table_size=16M --query_cache_limit=1M --query_cache_min_res_unit=4K --query_cache_size=128M --query_cache_type=ON --sort_buffer_size=2M --table_definition_cache=400 --table_open_cache=4096 --thread_cache_size=75 --tmp_table_size=16M --max_allowed_packet=256M --max_connect_errors=100000 --max_connections=100 --innodb_buffer_pool_instances=4 --innodb_buffer_pool_size=1G --innodb_data_file_path=ibdata1:10M:autoextend:max:10G --innodb_file_per_table=1 --innodb_flush_method=O_DIRECT --innodb_flush_log_at_trx_commit=2 --innodb_io_capacity=200 --innodb_lock_wait_timeout=50 --innodb_log_buffer_size=8M --innodb_log_file_size=128M --innodb_log_files_in_group=2 --innodb_old_blocks_time=1000 --innodb_open_files=1024 --innodb_read_io_threads=4 --innodb_stats_on_metadata=OFF --innodb_strict_mode=OFF --innodb_write_io_threads=4 --innodb_force_load_corrupted=0 --innodb_fast_shutdown=1 --performance_schema=OFF --long_query_time=2 --slow_query_log=OFF --general_log=0 --net_write_timeout=90 --net_read_timeout=90 --wait_timeout=420 --interactive_timeout=420 --relay_log_recovery=0
  + pick_args=
  + test --user=mysql = PICK-ARGS-FROM-ARGV
  + parse_arg --user=mysql
  + echo --user=mysql
  + sed -e s/^[^=]*=//
  + user=mysql
  + test -n
  + parse_arg --basedir=/usr
  + echo --basedir=/usr
  + sed -e s/^[^=]*=//
  + basedir=/usr
  + parse_arg --datadir=/var/lib/mysql
  + echo --datadir=/var/lib/mysql
  + sed -e s/^[^=]*=//
  + ldata=/var/lib/mysql
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + ip_only=1
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + test -n
  + parse_arguments PICK-ARGS-FROM-ARGV --datadir=/var/lib/mysql/ --rpm
  + pick_args=
  + test PICK-ARGS-FROM-ARGV = PICK-ARGS-FROM-ARGV
  + pick_args=1
  + shift
  + parse_arg --datadir=/var/lib/mysql/
  + echo --datadir=/var/lib/mysql/
  + sed -e s/^[^=]*=//
  + ldata=/var/lib/mysql/
  + in_rpm=1
  + test -n
  + test -n /usr
  + bindir=/usr/bin
  + find_in_dirs resolveip /usr/bin /usr/bin
  + file=resolveip
  + shift
  + test -f /usr/bin/resolveip
  + test -n
  + echo /usr/bin/resolveip
  + break
  + resolveip=/usr/bin/resolveip
  + test -z /usr/bin/resolveip
  + find_in_dirs mysqld /usr/bin /usr/libexec /usr/sbin /usr/bin
  + file=mysqld
  + shift
  + test -f /usr/bin/mysqld
  + test -n
  + echo /usr/bin/mysqld
  + break
  + mysqld=/usr/bin/mysqld
  + test -z /usr/bin/mysqld
  + find_in_dirs --dir errmsg.sys /usr/share/mysql/english /usr/share/english /usr/share/mysql/english
  + return_dir=1
  + shift
  + file=errmsg.sys
  + shift
  + test -f /usr/share/mysql/english/errmsg.sys
  + test -n 1
  + echo /usr/share/mysql/english
  + break
  + langdir=/usr/share/mysql/english
  + test -z /usr/share/mysql/english
  + find_in_dirs --dir fill_help_tables.sql /usr/share/mysql /usr/share /usr/share/mysql
  + return_dir=1
  + shift
  + file=fill_help_tables.sql
  + shift
  + test -f /usr/share/mysql/fill_help_tables.sql
  + test -n 1
  + echo /usr/share/mysql
  + break
  + srcpkgdatadir=/usr/share/mysql
  + buildpkgdatadir=/usr/share/mysql
  + test -z /usr/share/mysql
  + fill_help_tables=/usr/share/mysql/fill_help_tables.sql
  + create_system_tables=/usr/share/mysql/mysql_system_tables.sql
  + create_system_tables2=/usr/share/mysql/mysql_performance_tables.sql
  + fill_system_tables=/usr/share/mysql/mysql_system_tables_data.sql
  + maria_add_gis_sp=/usr/share/mysql/maria_add_gis_sp_bootstrap.sql
  + test ! -f /usr/share/mysql/fill_help_tables.sql
  + test ! -f /usr/share/mysql/mysql_system_tables.sql
  + test ! -f /usr/share/mysql/mysql_performance_tables.sql
  + test ! -f /usr/share/mysql/mysql_system_tables_data.sql
  + test ! -f /usr/share/mysql/maria_add_gis_sp_bootstrap.sql
  + test ! -x /usr/bin/mysqld
  + test -n /usr/share/mysql/english
  + test ! -f /usr/share/mysql/english/errmsg.sys
  + mysqld_opt=--lc-messages-dir=/usr/share/mysql/english/..
  + hostname
  + hostname=mariadb-4070839347-8qx3q
  + test 0 -eq 0 -a 1 -eq 0 -a 0 -eq 0
  + test 1 -eq 1
  + echo
  + awk / /{print $6}
  + hostname=
  + test ! -d /var/lib/mysql/
  + test -n mysql
  + chown mysql /var/lib/mysql/
  + test 0 -ne 0
  + test ! -d /var/lib/mysql//mysql
  + mkdir -p /var/lib/mysql//mysql
  +
  + chmod 700 /var/lib/mysql//mysql
  + test -n mysql
  + chown mysql /var/lib/mysql//mysql
  + test 0 -ne 0
  + test ! -d /var/lib/mysql//test
  + mkdir -p /var/lib/mysql//test
  +
  + chmod 700 /var/lib/mysql//test
  + test -n mysql
  + chown mysql /var/lib/mysql//test
  + test 0 -ne 0
  + test -n mysql
  + args= --user=mysql
  + test 0 -eq 1
  + filter_cmd_line=cat
  + mysqld_bootstrap=/usr/bin/mysqld
  + s_echo Installing MariaDB/MySQL system tables in '/var/lib/mysql/' ...
  + test 1 -eq 0 -a 0 -eq 0
  + install_params=
  SET @skip_auth_root_nopasswd=NULL;
  SET @auth_root_socket=NULL;
  + echo use mysql;
  SET @skip_auth_root_nopasswd=NULL;
  SET @auth_root_socket=NULL;
  + cat /usr/share/mysql/mysql_system_tables.sql /usr/share/mysql/mysql_performance_tables.sql /usr/share/mysql/mysql_system_tables_data.sql /usr/share/mysql/fill_help_tables.sql /usr/share/mysql/maria_add_gis_sp_bootstrap.sql
  + mysqld_install_cmd_line
  + /usr/bin/mysqld --lc-messages-dir=/usr/share/mysql/english/.. --bootstrap --basedir=/usr --datadir=/var/lib/mysql/ --enforce-storage-engine= --user=mysql --max_allowed_packet=8M --net_buffer_length=16K
  + eval cat
  + cat
  2018-02-20  8:25:22 140043505183624 [Note] /usr/bin/mysqld (mysqld 10.2.13-MariaDB) starting as process 59 ...
  2018-02-20  8:25:22 140043505183624 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
  2018-02-20  8:25:22 140043505183624 [Note] InnoDB: Uses event mutexes
  2018-02-20  8:25:22 140043505183624 [Note] InnoDB: Compressed tables use zlib 1.2.11
  2018-02-20  8:25:22 140043505183624 [Note] InnoDB: Using Linux native AIO
  2018-02-20  8:25:22 140043505183624 [Note] InnoDB: Number of pools: 1
  2018-02-20  8:25:22 140043505183624 [Note] InnoDB: Using SSE2 crc32 instructions
  2018-02-20  8:25:22 140043505183624 [Note] InnoDB: Initializing buffer pool, total size = 1G, instances = 4, chunk size = 128M
  2018-02-20  8:25:22 140043505183624 [Note] InnoDB: Completed initialization of buffer pool
  2018-02-20  8:25:22 140042030324456 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
  2018-02-20  8:25:22 140043505183624 [Note] InnoDB: The first innodb_system data file 'ibdata1' did not exist. A new tablespace will be created!
  2018-02-20  8:25:22 140043505183624 [Note] InnoDB: Setting file './ibdata1' size to 10 MB. Physically writing the file full; Please wait ...
  2018-02-20  8:25:22 140043505183624 [Note] InnoDB: File './ibdata1' size is now 10 MB.
  2018-02-20  8:25:22 140043505183624 [Note] InnoDB: Setting log file ./ib_logfile101 size to 134217728 bytes
  2018-02-20  8:25:22 140043505183624 [Note] InnoDB: Setting log file ./ib_logfile1 size to 134217728 bytes
  2018-02-20  8:25:22 140043505183624 [Note] InnoDB: Renaming log file ./ib_logfile101 to ./ib_logfile0
  2018-02-20  8:25:22 140043505183624 [Note] InnoDB: New log files created, LSN=45790
  2018-02-20  8:25:22 140043505183624 [Note] InnoDB: Doublewrite buffer not found: creating new
  2018-02-20  8:25:22 140043505183624 [Note] InnoDB: Doublewrite buffer created
  2018-02-20  8:25:22 140043505183624 [Note] InnoDB: 128 out of 128 rollback segments are active.
  2018-02-20  8:25:22 140043505183624 [Note] InnoDB: Creating foreign key constraint system tables.
  2018-02-20  8:25:22 140043505183624 [Note] InnoDB: Creating tablespace and datafile system tables.
  2018-02-20  8:25:22 140043505183624 [Note] InnoDB: Creating sys_virtual system tables.
  2018-02-20  8:25:22 140043505183624 [Note] InnoDB: Creating shared tablespace for temporary tables
  2018-02-20  8:25:22 140043505183624 [Note] InnoDB: Setting file './ibtmp1' size to 12 MB. Physically writing the file full; Please wait ...
  2018-02-20  8:25:22 140043505183624 [Note] InnoDB: File './ibtmp1' size is now 12 MB.
  2018-02-20  8:25:22 140043505183624 [Note] InnoDB: Waiting for purge to start
  2018-02-20  8:25:22 140043505183624 [Note] InnoDB: 5.7.21 started; log sequence number 0
  2018-02-20  8:25:22 140043505183624 [Note] Plugin 'FEEDBACK' is disabled.
  </code></pre>
  
  <p>UPDATED:</p>
  
  <p>I compiled MariaDB with <code>CMAKE_BUILD_TYPE=Debug</code> mode but couldn't reproduce this bug, tried <code>RelWithDebInfo</code> as was suggested by @elenst here and this is what I got:</p>
  
  <pre><code># ps aux
  PID   USER     TIME   COMMAND
      1 mysql      0:00 bash /docker-entrypoint.sh mysqld
     13 mysql      0:00 {init_mariadb} /bin/bash /usr/local/bin/init_mariadb mysqld
     25 mysql      0:00 {mysql_install_d} /bin/sh /usr/bin/mysql_install_db --datadir=/var/lib/mysql/ --rpm
     59 mysql      0:00 {mysql_install_d} /bin/sh /usr/bin/mysql_install_db --datadir=/var/lib/mysql/ --rpm
     61 mysql      0:00 /usr/bin/mysqld --lc-messages-dir=/usr/share/mysql/english/.. --bootstrap --basedir=/usr --datadir=/var/lib/mysql/ --debug --enforce-storage-engine= --user
    159 root       0:00 sh
    167 root       0:00 ps aux
  
  # strace -p 61
  strace: Process 61 attached
  restart_syscall(&lt;... resuming interrupted nanosleep ...&gt;) = 0
  nanosleep({tv_sec=0, tv_nsec=100000000}, NULL) = 0
  nanosleep({tv_sec=0, tv_nsec=100000000}, NULL) = 0
  nanosleep({tv_sec=0, tv_nsec=100000000}, NULL) = 0
  nanosleep({tv_sec=0, tv_nsec=100000000}, NULL) = 0
  ...
  </code></pre>
  
  <p>strace of all other processes shows <code>wait4(-1,</code></p>
  
  <p>UPDATED 2:</p>
  
  <pre><code># gdb --batch --eval-command="thread apply all bt full" /usr/bin/mysqld 61
  [New LWP 62]
  [New LWP 63]
  [New LWP 64]
  [New LWP 65]
  [New LWP 66]
  [New LWP 67]
  [New LWP 68]
  [New LWP 69]
  [New LWP 70]
  [New LWP 71]
  [New LWP 72]
  [New LWP 73]
  [New LWP 76]
  [New LWP 92]
  0x00007fc86ec6af33 in __clone () from /lib/ld-musl-x86_64.so.1
  
  Thread 15 (LWP 92):
  #0  0x00007fc86ec6af33 in __clone () from /lib/ld-musl-x86_64.so.1
  No symbol table info available.
  #1  0x00007fc86ec68663 in ?? () from /lib/ld-musl-x86_64.so.1
  No symbol table info available.
  #2  0x00007fc817d53b30 in ?? ()
  No symbol table info available.
  #3  0x0000000000000000 in ?? ()
  No symbol table info available.
  
  Thread 14 (LWP 76):
  #0  0x00007fc86ec6af33 in __clone () from /lib/ld-musl-x86_64.so.1
  No symbol table info available.
  #1  0x00007fc86ec68663 in ?? () from /lib/ld-musl-x86_64.so.1
  No symbol table info available.
  #2  0x00007fc816fd4b30 in ?? ()
  No symbol table info available.
  #3  0x0000000000000000 in ?? ()
  No symbol table info available.
  
  Thread 13 (LWP 73):
  #0  0x00007fc86ec6af33 in __clone () from /lib/ld-musl-x86_64.so.1
  No symbol table info available.
  #1  0x00007fc86ec68663 in ?? () from /lib/ld-musl-x86_64.so.1
  No symbol table info available.
  #2  0x00007fc817019b30 in ?? ()
  No symbol table info available.
  #3  0x0000000000000000 in ?? ()
  No symbol table info available.
  
  Thread 12 (LWP 72):
  #0  0x00007fc86ea15585 in ?? () from /usr/lib/libaio.so.1
  No symbol table info available.
  #1  0x000055e3f43759c1 in ?? ()
  No symbol table info available.
  #2  0x000055e3f4375f12 in ?? ()
  No symbol table info available.
  #3  0x000055e3f4377831 in ?? ()
  No symbol table info available.
  #4  0x000055e3f450ca5a in ?? ()
  No symbol table info available.
  #5  0x000055e3f440f9a8 in ?? ()
  No symbol table info available.
  #6  0x00007fc86ec68ff8 in ?? () from /lib/ld-musl-x86_64.so.1
  No symbol table info available.
  #7  0x0000000000000000 in ?? ()
  No symbol table info available.
  
  Thread 11 (LWP 71):
  #0  0x00007fc86ea15585 in ?? () from /usr/lib/libaio.so.1
  No symbol table info available.
  #1  0x000055e3f43759c1 in ?? ()
  No symbol table info available.
  #2  0x000055e3f4375f12 in ?? ()
  No symbol table info available.
  #3  0x000055e3f4377831 in ?? ()
  No symbol table info available.
  #4  0x000055e3f450ca5a in ?? ()
  No symbol table info available.
  #5  0x000055e3f440f9a8 in ?? ()
  No symbol table info available.
  #6  0x00007fc86ec68ff8 in ?? () from /lib/ld-musl-x86_64.so.1
  No symbol table info available.
  #7  0x0000000000000000 in ?? ()
  No symbol table info available.
  
  Thread 10 (LWP 70):
  #0  0x00007fc86ea15585 in ?? () from /usr/lib/libaio.so.1
  No symbol table info available.
  #1  0x000055e3f43759c1 in ?? ()
  No symbol table info available.
  #2  0x000055e3f4375f12 in ?? ()
  No symbol table info available.
  #3  0x000055e3f4377831 in ?? ()
  No symbol table info available.
  #4  0x000055e3f450ca5a in ?? ()
  No symbol table info available.
  #5  0x000055e3f440f9a8 in ?? ()
  No symbol table info available.
  #6  0x00007fc86ec68ff8 in ?? () from /lib/ld-musl-x86_64.so.1
  No symbol table info available.
  #7  0x0000000000000000 in ?? ()
  No symbol table info available.
  
  Thread 9 (LWP 69):
  #0  0x00007fc86ea15585 in ?? () from /usr/lib/libaio.so.1
  No symbol table info available.
  #1  0x000055e3f43759c1 in ?? ()
  No symbol table info available.
  #2  0x000055e3f4375f12 in ?? ()
  No symbol table info available.
  #3  0x000055e3f4377831 in ?? ()
  No symbol table info available.
  #4  0x000055e3f450ca5a in ?? ()
  No symbol table info available.
  #5  0x000055e3f440f9a8 in ?? ()
  No symbol table info available.
  #6  0x00007fc86ec68ff8 in ?? () from /lib/ld-musl-x86_64.so.1
  No symbol table info available.
  #7  0x0000000000000000 in ?? ()
  No symbol table info available.
  
  Thread 8 (LWP 68):
  #0  0x00007fc86ea15585 in ?? () from /usr/lib/libaio.so.1
  No symbol table info available.
  #1  0x000055e3f43759c1 in ?? ()
  No symbol table info available.
  #2  0x000055e3f4375f12 in ?? ()
  No symbol table info available.
  #3  0x000055e3f4377831 in ?? ()
  No symbol table info available.
  #4  0x000055e3f450ca5a in ?? ()
  No symbol table info available.
  #5  0x000055e3f440f9a8 in ?? ()
  No symbol table info available.
  #6  0x00007fc86ec68ff8 in ?? () from /lib/ld-musl-x86_64.so.1
  No symbol table info available.
  #7  0x0000000000000000 in ?? ()
  No symbol table info available.
  
  Thread 7 (LWP 67):
  #0  0x00007fc86ea15585 in ?? () from /usr/lib/libaio.so.1
  No symbol table info available.
  #1  0x000055e3f43759c1 in ?? ()
  No symbol table info available.
  #2  0x000055e3f4375f12 in ?? ()
  No symbol table info available.
  #3  0x000055e3f4377831 in ?? ()
  No symbol table info available.
  #4  0x000055e3f450ca5a in ?? ()
  No symbol table info available.
  #5  0x000055e3f440f9a8 in ?? ()
  No symbol table info available.
  #6  0x00007fc86ec68ff8 in ?? () from /lib/ld-musl-x86_64.so.1
  No symbol table info available.
  #7  0x0000000000000000 in ?? ()
  No symbol table info available.
  
  Thread 6 (LWP 66):
  #0  0x00007fc86ea15585 in ?? () from /usr/lib/libaio.so.1
  No symbol table info available.
  #1  0x000055e3f43759c1 in ?? ()
  No symbol table info available.
  #2  0x000055e3f4375f12 in ?? ()
  No symbol table info available.
  #3  0x000055e3f4377831 in ?? ()
  No symbol table info available.
  #4  0x000055e3f450ca5a in ?? ()
  No symbol table info available.
  #5  0x000055e3f440f9a8 in ?? ()
  No symbol table info available.
  #6  0x00007fc86ec68ff8 in ?? () from /lib/ld-musl-x86_64.so.1
  No symbol table info available.
  #7  0x0000000000000000 in ?? ()
  No symbol table info available.
  
  Thread 5 (LWP 65):
  #0  0x00007fc86ea15585 in ?? () from /usr/lib/libaio.so.1
  No symbol table info available.
  #1  0x000055e3f43759c1 in ?? ()
  No symbol table info available.
  #2  0x000055e3f4375f12 in ?? ()
  No symbol table info available.
  #3  0x000055e3f4377831 in ?? ()
  No symbol table info available.
  #4  0x000055e3f450ca5a in ?? ()
  No symbol table info available.
  #5  0x000055e3f440f9a8 in ?? ()
  No symbol table info available.
  #6  0x00007fc86ec68ff8 in ?? () from /lib/ld-musl-x86_64.so.1
  No symbol table info available.
  #7  0x0000000000000000 in ?? ()
  No symbol table info available.
  
  Thread 4 (LWP 64):
  #0  0x00007fc86ea15585 in ?? () from /usr/lib/libaio.so.1
  No symbol table info available.
  #1  0x000055e3f43759c1 in ?? ()
  No symbol table info available.
  #2  0x000055e3f4375f12 in ?? ()
  No symbol table info available.
  #3  0x000055e3f4377831 in ?? ()
  No symbol table info available.
  #4  0x000055e3f450ca5a in ?? ()
  No symbol table info available.
  #5  0x000055e3f440f9a8 in ?? ()
  No symbol table info available.
  #6  0x00007fc86ec68ff8 in ?? () from /lib/ld-musl-x86_64.so.1
  No symbol table info available.
  #7  0x0000000000000000 in ?? ()
  No symbol table info available.
  
  Thread 3 (LWP 63):
  #0  0x00007fc86ea15585 in ?? () from /usr/lib/libaio.so.1
  No symbol table info available.
  #1  0x000055e3f43759c1 in ?? ()
  No symbol table info available.
  #2  0x000055e3f4375f12 in ?? ()
  No symbol table info available.
  #3  0x000055e3f4377831 in ?? ()
  No symbol table info available.
  #4  0x000055e3f450ca5a in ?? ()
  No symbol table info available.
  #5  0x000055e3f440f9a8 in ?? ()
  No symbol table info available.
  #6  0x00007fc86ec68ff8 in ?? () from /lib/ld-musl-x86_64.so.1
  No symbol table info available.
  #7  0x0000000000000000 in ?? ()
  No symbol table info available.
  
  Thread 2 (LWP 62):
  #0  0x00007fc86ec6af33 in __clone () from /lib/ld-musl-x86_64.so.1
  No symbol table info available.
  #1  0x00007fc86ec68663 in ?? () from /lib/ld-musl-x86_64.so.1
  No symbol table info available.
  #2  0x00007fc86ee9db30 in ?? ()
  No symbol table info available.
  #3  0x0000000000000000 in ?? ()
  No symbol table info available.
  
  Thread 1 (LWP 61):
  #0  0x00007fc86ec6af33 in __clone () from /lib/ld-musl-x86_64.so.1
  No symbol table info available.
  #1  0x00007fc86ec68663 in ?? () from /lib/ld-musl-x86_64.so.1
  No symbol table info available.
  #2  0x00007fc86eea2bd0 in ?? () from /lib/ld-musl-x86_64.so.1
  No symbol table info available.
  #3  0x0000000000000000 in ?? ()
  No symbol table info available.
  </code></pre>