2020-12-21  8:39:28 0 [Note] WSREP: Loading provider /usr/lib64/galera-4/libgalera_smm.so initial position: 1950e2bd-406e-11eb-82d2-86eca98a60c3:62305
2020-12-21  8:39:28 0 [Note] WSREP: wsrep_load(): loading provider library '/usr/lib64/galera-4/libgalera_smm.so'
2020-12-21  8:39:28 0 [Note] WSREP: wsrep_load(): Galera 26.4.5(rb3764ab6) by Codership Oy <info@codership.com> loaded successfully.
2020-12-21  8:39:28 0 [Note] WSREP: CRC-32C: using hardware acceleration.
2020-12-21  8:39:28 0 [Note] WSREP: Found saved state: 1950e2bd-406e-11eb-82d2-86eca98a60c3:-1, safe_to_bootstrap: 1
2020-12-21  8:39:28 0 [Note] WSREP: GCache DEBUG: opened preamble:
Version: 2
UUID: 1950e2bd-406e-11eb-82d2-86eca98a60c3
Seqno: -1 - -1
Offset: -1
Synced: 0
2020-12-21  8:39:28 0 [Note] WSREP: Recovering GCache ring buffer: version: 2, UUID: 1950e2bd-406e-11eb-82d2-86eca98a60c3, offset: -1
2020-12-21  8:39:28 0 [Note] WSREP: GCache::RingBuffer initial scan...  0.0% (         0/4294967320 bytes) complete.
2020-12-21  8:39:28 0 [Note] WSREP: GCache::RingBuffer initial scan...100.0% (4294967320/4294967320 bytes) complete.
2020-12-21  8:39:28 0 [Note] WSREP: Recovering GCache ring buffer: found gapless sequence 60280-62306
2020-12-21  8:39:28 0 [Note] WSREP: GCache::RingBuffer unused buffers scan...  0.0% (         0/2526939496 bytes) complete.
2020-12-21  8:39:28 0 [Note] WSREP: GCache::RingBuffer unused buffers scan...100.0% (2526939496/2526939496 bytes) complete.
2020-12-21  8:39:28 0 [Note] WSREP: GCache DEBUG: RingBuffer::recover(): found 2/2029 locked buffers
2020-12-21  8:39:28 0 [Note] WSREP: GCache DEBUG: RingBuffer::recover(): free space: 1768028048/4294967296
2020-12-21  8:39:28 0 [Note] WSREP: Passing config to GCS: base_dir = /var/lib/mysql/; base_host = 172.31.9.229; base_port = 4567; cert.log_conflicts = no; cert.optimistic_pa = yes; debug = no; evs.auto_evict = 0; evs.causal_keepalive_period = PT3S; evs.debug_log_mask = 0x1; evs.delay_margin = PT5S; evs.delayed_keep_period = PT30S; evs.inactive_check_period = PT1S; evs.inactive_timeout = PT1M; evs.info_log_mask = 0; evs.install_timeout = PT1M; evs.join_retrans_period = PT3S; evs.keepalive_period = PT3S; evs.max_install_timeouts = 3; evs.send_window = 1024; evs.stats_report_period = PT1M; evs.suspect_timeout = PT15S; evs.use_aggregate = true; evs.user_send_window = 512; evs.version = 1; evs.view_forget_timeout = P1D; gcache.dir = /var/lib/mysql/; gcache.keep_pages_size = 4; gcache.mem_size = 0; gcache.name = galera.cache; gcache.page_size = 128M; gcache.recover = yes; gcache.size = 4G; gcomm.thread_prio = ; gcs.fc_debug = 0; gcs.fc_factor = 1.0; gcs.fc_limit = 10000; gcs.fc_master_slave = no; gcs.max_packet_size = 100000; gcs.max_throttl
2020-12-21  8:39:28 0 [Note] WSREP: Service thread queue flushed.
2020-12-21  8:39:28 0 [Note] WSREP: ####### Assign initial position for certification: 1950e2bd-406e-11eb-82d2-86eca98a60c3:62305, protocol version: -1
2020-12-21  8:39:28 0 [Note] WSREP: Start replication
2020-12-21  8:39:28 0 [Note] WSREP: Connecting with bootstrap option: 1
2020-12-21  8:39:28 0 [Note] WSREP: Setting GCS initial position to 1950e2bd-406e-11eb-82d2-86eca98a60c3:62305
2020-12-21  8:39:28 0 [Note] WSREP: protonet asio version 0
2020-12-21  8:39:28 0 [Note] WSREP: Using CRC-32C for message checksums.
2020-12-21  8:39:28 0 [Note] WSREP: backend: asio
2020-12-21  8:39:28 0 [Note] WSREP: gcomm thread scheduling priority set to other:0
2020-12-21  8:39:28 0 [Note] WSREP: restore pc from disk successfully
2020-12-21  8:39:28 0 [Note] WSREP: GMCast version 0
2020-12-21  8:39:28 0 [Note] WSREP: (dd1ef88d-a174, 'tcp://0.0.0.0:4567') listening at tcp://0.0.0.0:4567
2020-12-21  8:39:28 0 [Note] WSREP: (dd1ef88d-a174, 'tcp://0.0.0.0:4567') multicast: , ttl: 1
2020-12-21  8:39:28 0 [Note] WSREP: EVS version 1
2020-12-21  8:39:28 0 [Note] WSREP: gcomm: bootstrapping new group 'test_105'
2020-12-21  8:39:28 0 [Note] WSREP: start_prim is enabled, turn off pc_recovery
2020-12-21  8:39:28 0 [Note] WSREP: EVS version upgrade 0 -> 1
2020-12-21  8:39:28 0 [Note] WSREP: PC protocol upgrade 0 -> 1
2020-12-21  8:39:28 0 [Note] WSREP: Node dd1ef88d-a174 state prim
2020-12-21  8:39:28 0 [Note] WSREP: view(view_id(PRIM,dd1ef88d-a174,5) memb {
        dd1ef88d-a174,1
} joined {
} left {
} partitioned {
})
2020-12-21  8:39:28 0 [Note] WSREP: save pc into disk
2020-12-21  8:39:28 0 [Note] WSREP: discarding pending addr without UUID: tcp://172.31.2.72:4567
2020-12-21  8:39:28 0 [Note] WSREP: discarding pending addr proto entry 0x560091ead7c0
2020-12-21  8:39:28 0 [Note] WSREP: discarding pending addr without UUID: tcp://172.31.9.229:4567
2020-12-21  8:39:28 0 [Note] WSREP: discarding pending addr proto entry 0x560091f26dd0
2020-12-21  8:39:28 0 [Note] WSREP: clear restored view
2020-12-21  8:39:28 0 [Note] WSREP: gcomm: connected
2020-12-21  8:39:28 0 [Note] WSREP: Changing maximum packet size to 100000, resulting msg size: 32636
2020-12-21  8:39:28 0 [Note] WSREP: Shifting CLOSED -> OPEN (TO: 0)
2020-12-21  8:39:28 0 [Note] WSREP: Opened channel 'test_105'
2020-12-21  8:39:28 0 [Note] WSREP: New COMPONENT: primary = yes, bootstrap = no, my_idx = 0, memb_num = 1
2020-12-21  8:39:28 0 [Note] WSREP: STATE_EXCHANGE: sent state UUID: 09e6b7cf-4368-11eb-9434-0bff8f31c835
2020-12-21  8:39:28 0 [Note] WSREP: STATE EXCHANGE: sent state msg: 09e6b7cf-4368-11eb-9434-0bff8f31c835
2020-12-21  8:39:28 0 [Note] WSREP: STATE EXCHANGE: got state msg: 09e6b7cf-4368-11eb-9434-0bff8f31c835 from 0 (TEST2)
2020-12-21  8:39:28 0 [Note] WSREP: Quorum results:
        version    = 6,
        component  = PRIMARY,
        conf_id    = 0,
        members    = 1/1 (joined/total),
        act_id     = 62305,
        last_appl. = 62305,
        protocols  = 2/10/4 (gcs/repl/appl),
        vote policy= 0,
        group UUID = 1950e2bd-406e-11eb-82d2-86eca98a60c3
2020-12-21  8:39:28 1 [Note] WSREP: Starting rollbacker thread 1
2020-12-21  8:39:28 2 [Note] WSREP: Starting applier thread 2
2020-12-21  8:39:28 0 [Note] WSREP: Flow-control interval: [10000, 10000]
2020-12-21  8:39:28 0 [Note] WSREP: Restored state OPEN -> JOINED (62306)
2020-12-21  8:39:28 0 [Note] WSREP: Member 0.1 (TEST2) synced with group.
2020-12-21  8:39:28 0 [Note] WSREP: Shifting JOINED -> SYNCED (TO: 62306)
2020-12-21  8:39:28 2 [Note] WSREP: ####### processing CC 62306, local, ordered
2020-12-21  8:39:28 2 [Note] WSREP: Process first view: 1950e2bd-406e-11eb-82d2-86eca98a60c3 my uuid: dd1ef88d-4365-11eb-a174-6ae3532260b4
2020-12-21  8:39:28 2 [Note] WSREP: Server TEST2 connected to cluster at position 1950e2bd-406e-11eb-82d2-86eca98a60c3:62306 with ID dd1ef88d-4365-11eb-a174-6ae3532260b4
2020-12-21  8:39:28 2 [Note] WSREP: Server status change disconnected -> connected
2020-12-21  8:39:28 2 [Note] WSREP: wsrep_notify_cmd is not defined, skipping notification.
2020-12-21  8:39:28 2 [Note] WSREP: ####### My UUID: dd1ef88d-4365-11eb-a174-6ae3532260b4
2020-12-21  8:39:28 2 [Note] WSREP: Cert index reset to 00000000-0000-0000-0000-000000000000:-1 (proto: 10), state transfer needed: no
2020-12-21  8:39:28 0 [Note] WSREP: Service thread queue flushed.
2020-12-21  8:39:28 2 [Note] WSREP: ####### Assign initial position for certification: 00000000-0000-0000-0000-000000000000:-1, protocol version: -1
2020-12-21  8:39:28 2 [Note] WSREP: REPL Protocols: 10 (5)
2020-12-21  8:39:28 2 [Note] WSREP: ####### Adjusting cert position: -1 -> 62306
2020-12-21  8:39:28 0 [Note] WSREP: Service thread queue flushed.
2020-12-21  8:39:28 2 [Note] WSREP: ================================================
View:
  id: 1950e2bd-406e-11eb-82d2-86eca98a60c3:62306
  status: primary
  protocol_version: 4
  capabilities: MULTI-MASTER, CERTIFICATION, PARALLEL_APPLYING, REPLAY, ISOLATION, PAUSE, CAUSAL_READ, INCREMENTAL_WS, UNORDERED, PREORDERED, STREAMING, NBO
  final: no
  own_index: 0
  members(1):
        0: dd1ef88d-4365-11eb-a174-6ae3532260b4, TEST2
=================================================
2020-12-21  8:39:28 2 [Note] WSREP: Server status change connected -> joiner
2020-12-21  8:39:28 2 [Note] WSREP: wsrep_notify_cmd is not defined, skipping notification.
2020-12-21  8:39:28 2 [Note] WSREP: Server status change joiner -> initializing
2020-12-21  8:39:28 2 [Note] WSREP: wsrep_notify_cmd is not defined, skipping notification.
2020-12-21  8:39:28 0 [Note] InnoDB: innodb_page_size=65536
2020-12-21  8:39:28 0 [Note] InnoDB: Using Linux native AIO
2020-12-21  8:39:28 0 [Note] InnoDB: Uses event mutexes
2020-12-21  8:39:28 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2020-12-21  8:39:28 0 [Note] InnoDB: Number of pools: 1
2020-12-21  8:39:28 0 [Note] InnoDB: Using SSE4.2 crc32 instructions
2020-12-21  8:39:28 0 [Note] InnoDB: Disabling background log and ibuf IO write threads.
2020-12-21  8:39:28 0 [Note] InnoDB: Initializing buffer pool, total size = 134217728, chunk size = 134217728
2020-12-21  8:39:28 0 [Note] InnoDB: Completed initialization of buffer pool
2020-12-21  8:39:28 0 [Note] InnoDB: innodb_force_recovery=6 skips redo log apply
2020-12-21  8:39:28 0 [Note] InnoDB: 10.5.6 started; log sequence number 0; transaction id 0
2020-12-21  8:39:28 0 [Note] InnoDB: !!! innodb_force_recovery is set to 6 !!!
2020-12-21  8:39:28 0 [Note] Plugin 'FEEDBACK' is disabled.
2020-12-21  8:39:28 0 [Note] Server socket created on IP: '0.0.0.0'.
2020-12-21  8:39:28 0 [Warning] 'user' entry '@west1' ignored in --skip-name-resolve mode.
2020-12-21  8:39:28 0 [Warning] 'proxies_priv' entry '@% root@west1' ignored in --skip-name-resolve mode.
2020-12-21  8:39:28 0 [Note] WSREP: wsrep_init_schema_and_SR 0x0
2020-12-21  8:39:28 0 [Note] WSREP: Server initialized
2020-12-21  8:39:28 0 [Note] WSREP: Server status change initializing -> initialized
2020-12-21  8:39:28 0 [Note] WSREP: wsrep_notify_cmd is not defined, skipping notification.
2020-12-21  8:39:28 2 [Note] WSREP: Bootstrapping a new cluster, setting initial position to 00000000-0000-0000-0000-000000000000:-1
201221  8:39:28 [ERROR] mysqld got signal 11 ;
This could be because you hit a bug. It is also possible that this binary
or one of the libraries it was linked against is corrupt, improperly built,
or misconfigured. This error can also be caused by malfunctioning hardware.

To report this bug, see https://mariadb.com/kb/en/reporting-bugs

We will try our best to scrape up some info that will hopefully help
diagnose the problem, but since we have already crashed,
something is definitely wrong and this may fail.

Server version: 10.5.6-MariaDB-log
key_buffer_size=134217728
read_buffer_size=131072
max_used_connections=0
max_threads=153
thread_count=2
It is possible that mysqld could use up to
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 467803 K  bytes of memory
Hope that's ok; if not, decrease some variables in the equation.

Thread pointer: 0x7f3db8000c58
Attempting backtrace. You can use the following information to find out
where mysqld died. If you see no messages after this, something went
terribly wrong...
stack_bottom = 0x7f3ed00eac58 thread_stack 0x49000
??:0(my_print_stacktrace)[0x56008ead2ece]
??:0(handle_fatal_signal)[0x56008e55dec5]
sigaction.c:0(__restore_rt)[0x7f3ed3a42b20]
??:0(std::_Rb_tree<unsigned int, unsigned int, std::_Identity<unsigned int>, std::less<unsigned int>, std::allocator<unsigned int> >::_M_erase(std::_Rb_tree_node<unsigned int>*))[0x56008e93f352]
??:0(std::_Rb_tree<unsigned int, unsigned int, std::_Identity<unsigned int>, std::less<unsigned int>, std::allocator<unsigned int> >::_M_erase(std::_Rb_tree_node<unsigned int>*))[0x56008e93fdad]
??:0(wsrep_notify_status(wsrep::server_state::state, wsrep::view const*))[0x56008e812a92]
??:0(wsrep_xid_seqno)[0x56008e7e20c6]
??:0(plugin_foreach_with_mask(THD*, char (*)(THD*, st_plugin_int*, void*), int, unsigned int, void*))[0x56008e37bcdb]
??:0(wsrep_set_SE_checkpoint(wsrep::gtid const&, wsrep_server_gtid_t const&))[0x56008e7e2b88]
??:0(Wsrep_server_service::bootstrap())[0x56008e7ff694]
??:0(wsrep::server_state::on_primary_view(wsrep::view const&, wsrep::high_priority_service*))[0x56008eb5afde]
??:0(wsrep::server_state::on_view(wsrep::view const&, wsrep::high_priority_service*))[0x56008eb5d7d2]
??:0(wsrep::wsrep_provider_v26::wsrep_provider_v26(wsrep::server_state&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, wsrep::provider::services const&))[0x56008eb7062c]
src/replicator_smm.cpp:2429(galera::ReplicatorSMM::submit_view_info(void*, wsrep_view_info const*))[0x7f3ecbb5a819]
src/replicator_smm.cpp:2824(galera::ReplicatorSMM::submit_ordered_view_info(void*, wsrep_view_info const*))[0x7f3ecbb5a845]
src/replicator_smm.cpp:3010(galera::ReplicatorSMM::process_prim_conf_change(void*, gcs_act_cchange const&, int, void*))[0x7f3ecbb64c01]
src/galera_gcs.hpp:173(galera::ReplicatorSMM::process_conf_change(void*, gcs_action const&))[0x7f3ecbb64e0b]
src/gcs_action_source.cpp:155(galera::GcsActionSource::dispatch(void*, gcs_action const&, bool&))[0x7f3ecbb3d320]
src/gcs_action_source.cpp:29(galera::GcsActionSource::process(void*, bool&))[0x7f3ecbb3d5b1]
src/replicator_smm.cpp:390(galera::ReplicatorSMM::async_recv(void*))[0x7f3ecbb63500]
src/wsrep_provider.cpp:263(galera_recv)[0x7f3ecbb79098]
??:0(wsrep::wsrep_provider_v26::run_applier(wsrep::high_priority_service*))[0x56008eb6caee]
??:0(wsrep_fire_rollbacker)[0x56008e7f79b3]
??:0(start_wsrep_THD(void*))[0x56008e7e9cef]
??:0(MyCTX_nopad::finish(unsigned char*, unsigned int*))[0x56008e77cd5a]
pthread_create.c:0(start_thread)[0x7f3ed3a3814a]
:0(__GI___clone)[0x7f3ed1942f23]

Trying to get some variables.
Some pointers may be invalid and cause the dump to abort.
Query (0x0):
Connection ID (thread ID): 2
Status: NOT_KILLED

Optimizer switch: index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on,condition_pushdown_for_subquery=on,rowid_filter=on,condition_pushdown_from_having=on,not_null_range_scan=off

The manual page at https://mariadb.com/kb/en/how-to-produce-a-full-stack-trace-for-mysqld/ contains
information that should help you find out what is causing the crash.
Writing a core file...
Working directory at /var/lib/mysql
Resource Limits:
Limit                     Soft Limit           Hard Limit           Units
Max cpu time              unlimited            unlimited            seconds
Max file size             unlimited            unlimited            bytes
Max data size             unlimited            unlimited            bytes
Max stack size            8388608              unlimited            bytes
Max core file size        unlimited            unlimited            bytes
Max resident set          unlimited            unlimited            bytes
Max processes             126038               126038               processes
Max open files            16384                16384                files
Max locked memory         16777216             16777216             bytes
Max address space         unlimited            unlimited            bytes
Max file locks            unlimited            unlimited            locks
Max pending signals       126038               126038               signals
Max msgqueue size         819200               819200               bytes
Max nice priority         0                    0
Max realtime priority     0                    0
Max realtime timeout      unlimited            unlimited            us
Core pattern: |/usr/lib/systemd/systemd-coredump %P %u %g %s %t %c %h %e