stack_bottom = 0x0 thread_stack 0x40000

*** buffer overflow detected ***: /u01/mariadb/bin/mysqld terminated

======= Backtrace: =========

/lib64/libc.so.6(__fortify_fail+0x37)[0x7f6f9059c597]

/lib64/libc.so.6(+0x10c750)[0x7f6f9059a750]

/lib64/libc.so.6(+0x10e507)[0x7f6f9059c507]

/u01/mariadb/bin/mysqld(my_addr_resolve+0xda)[0x7f6f9327932a]

/u01/mariadb/bin/mysqld(my_print_stacktrace+0x1c2)[0x7f6f93262a22]

/u01/mariadb/bin/mysqld(handle_fatal_signal+0x357)[0x7f6f92cf04b7]

/lib64/libpthread.so.0(+0xf100)[0x7f6f9213d100]

/u01/mariadb/bin/mysqld(_ZN12Active_tranx24clear_active_tranx_nodesEPKcy+0xc6)[0x7f6f92c3f7d6]

/u01/mariadb/bin/mysqld(_ZN21Repl_semi_sync_master10switch_offEv+0x1e)[0x7f6f92c3fcae]

/u01/mariadb/bin/mysqld(_ZN21Repl_semi_sync_master11init_objectEv+0xd4)[0x7f6f92c3fe64]

/u01/mariadb/bin/mysqld(+0x4f2b3f)[0x7f6f92a60b3f]

/u01/mariadb/bin/mysqld(_Z11mysqld_mainiPPc+0x4b7)[0x7f6f92a67287]

/lib64/libc.so.6(__libc_start_main+0xf5)[0x7f6f904afb15]

/u01/mariadb/bin/mysqld(+0x4ec7ed)[0x7f6f92a5a7ed]

353 int Repl_semi_sync_master::init_object()

 354 {

 355   int result;

 356

 357   m_init_done = true;

 358

 359   /* References to the parameter works after set_options(). */

 360   set_wait_timeout(rpl_semi_sync_master_timeout);

 361   set_trace_level(rpl_semi_sync_master_trace_level);

 362   set_wait_point(rpl_semi_sync_master_wait_point);

 363

 364   /* Mutex initialization can only be done after MY_INIT(). */

 365   mysql_mutex_init(key_LOCK_binlog,

 366                    &LOCK_binlog, MY_MUTEX_INIT_FAST);

 367   mysql_cond_init(key_COND_binlog_send,

 368                   &COND_binlog_send, NULL);

 369

370   if (rpl_semi_sync_master_enabled)

 371   {

 372     result = enable_master();

 373     if (!result)**

 374       result= ack_receiver.start(); /* Start the ACK thread. */

 375   }

 376   else

 377   {

 378     result = disable_master();

 379   }

 380

 381   /*

 382     If rpl_semi_sync_master_wait_no_slave is disabled, let's temporarily

 383     switch off semisync to avoid hang if there's none active slave.

 384   */

 385   if (!rpl_semi_sync_master_wait_no_slave)

 386     switch_off();

 387

 388   return result;

 389 }

 391 int Repl_semi_sync_master::enable_master()

 392 {

 393   int result = 0;

 394

 395   /* Must have the lock when we do enable of disable. */

 396   lock();

 397

 398   if (!get_master_enabled())

 399   {

 400     m_active_tranxs = new Active_tranx(&LOCK_binlog, m_trace_level);

 401     if (m_active_tranxs != NULL)

 964 int Repl_semi_sync_master::switch_off()

 965 {

 966   int result;

 967

 968   DBUG_ENTER("Repl_semi_sync_master::switch_off");

 969

 970   m_state = false;

 971

 972   /* Clear the active transaction list. */

 973   assert(m_active_tranxs != NULL);

 974   result = m_active_tranxs->clear_active_tranx_nodes(NULL, 0);

 975

 976   rpl_semi_sync_master_off_times++;