maria-developers team mailing list archive

[김경남 <knamkim@xxxxxxxxx>]

Hi, Sergei! 

 

I'm writing daemon plugin . I hava a problem and don't find soultion
yet.

 

There is my code as below.

 

ex)plugin.cc

-----------------------------------------------------

pthread_handler_t monm_monitor(void *p)

{

     .... 

     THD* thd;
      thd = new THD;
      thd->thread_stack= (char*) &thd;

 

     tables.init_one_table("performance_schema", 18,
"events_statements_current", 25, "events_statements_current", TL_READ);
     open_and_lock_tables(thd, &tables, FALSE,
MYSQL_LOCK_IGNORE_TIMEOUT);

      .....


}

 

static int monm_plugin_init(void *p __attribute__ ((unused))) 

{

...

 pthread_create(&mon_thread, &attr, monm_monitor,(void *) ctx)!= 0)

....


}

-------------------------------------------------------------

In monm_monitor function, 

THD* thd    cause server crash. so  I examined coredump. 

#6  0x0000000000598752 in THD::THD (this=0x7f9b64000930,
is_wsrep_applier=false) at
/home/windfree/workspace/ws-mariadb/maria-mon/sql/sql_class.cc:1015

 

I don't know the reason of crash. 

What I just want to is read events_statements_current's row by using
internal interface in a daemon plugin. 

Is there a another way ? 

let me know the solution.

 

Regards,

Kyungnam.

 

 

 

 

 

 

 

 





  김경남 부책임연구원
    
   솔루션사업본부 정보기술 연구원 
   신기술개발팀
    02-2099-6177 / 010-2208-3006



 


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