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  1. Percona Server
  2. PS-1053

LP #1659992: Function over userstat tables cause mysql to crash

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    Details

    • Type: Bug
    • Status: Done
    • Priority: High
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: None

      Description

      **Reported in Launchpad by Juan Pablo Arruti last update 24-03-2017 12:48:59

      Description:

      Userstat tables combined with functions are causing crashes.

      How to repeat:

      userstat=ON

      mysql> select @@version ;
      -------------

      @@version

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

      5.6.34-79.1

      -------------
      1 row in set (0.00 sec)

      mysql> use test ;
      Database changed
      mysql> DELIMITER $$
      mysql> CREATE DEFINER=`root`@`localhost` FUNCTION `utility_get_global_variable`(in_name varchar(64)) RETURNS varchar(1024) CHARSET utf8
      -> DETERMINISTIC
      -> SQL SECURITY INVOKER
      -> BEGIN
      -> declare var_value varchar(1024);
      -> if @@global.version like '5.6.%' then
      -> select v.variable_value from information_schema.global_variables v where v.variable_name=in_name into var_value;
      -> else
      -> select v.variable_value from performance_schema.global_variables v where v.variable_name=in_name into var_value;
      -> end if;
      -> return var_value;
      -> END;
      -> $$
      Query OK, 0 rows affected (0.00 sec)

      mysql> delimiter ;
      mysql> select *
      -> from `information_schema`.`table_statistics` `s`
      -> where utility_get_global_variable('userstat')='ON';
      ERROR 2013 (HY000): Lost connection to MySQL server during query

      Log error messages:

      18:46:22 UTC - 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.
      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.
      Please help us make Percona Server better by reporting any
      bugs at http://bugs.percona.com/

      key_buffer_size=8388608
      read_buffer_size=131072
      max_used_connections=1
      max_threads=153
      thread_count=1
      connection_count=1
      It is possible that mysqld could use up to
      key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 69055 K bytes of memory
      Hope that's ok; if not, decrease some variables in the equation.

      Thread pointer: 0x7f901a3b3000
      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 = 7f902c881e00 thread_stack 0x40000
      /opt/percona_server/5.6.34/bin/mysqld(my_print_stacktrace+0x2e)[0x8e801e]
      /opt/percona_server/5.6.34/bin/mysqld(handle_fatal_signal+0x491)[0x6aa861]
      /lib/x86_64-linux-gnu/libpthread.so.0(+0x10330)[0x7f902c2d3330]
      /opt/percona_server/5.6.34/bin/mysqld(_Z11check_grantP3THDmP10TABLE_LISTbjb+0x75)[0x6c76c5]
      /opt/percona_server/5.6.34/bin/mysqld(_Z23fill_schema_table_statsP3THDP10TABLE_LISTP4Item+0x17d)[0x750a9d]
      /opt/percona_server/5.6.34/bin/mysqld(_Z24get_schema_tables_resultP4JOIN23enum_schema_table_state+0x2c1)[0x759311]
      /opt/percona_server/5.6.34/bin/mysqld(_ZN4JOIN14prepare_resultEPP4ListI4ItemE+0xa5)[0x73c0e5]
      /opt/percona_server/5.6.34/bin/mysqld(_ZN4JOIN4execEv+0x14f)[0x6ff06f]
      /opt/percona_server/5.6.34/bin/mysqld(_Z12mysql_selectP3THDP10TABLE_LISTjR4ListI4ItemEPS4_P10SQL_I_ListI8st_orderESB_S7_yP13select_resultP18st_select_lex_unitP13st_select_lex+0x265)[0x73fbd5]
      /opt/percona_server/5.6.34/bin/mysqld(_Z13handle_selectP3THDP13select_resultm+0x195)[0x73fea5]
      /opt/percona_server/5.6.34/bin/mysqld[0x5d09c3]
      /opt/percona_server/5.6.34/bin/mysqld(_Z21mysql_execute_commandP3THD+0x1d68)[0x71ebe8]
      /opt/percona_server/5.6.34/bin/mysqld(_Z11mysql_parseP3THDPcjP12Parser_state+0x598)[0x7222a8]
      /opt/percona_server/5.6.34/bin/mysqld(_Z16dispatch_command19enum_server_commandP3THDPcj+0xef8)[0x723238]
      /opt/percona_server/5.6.34/bin/mysqld(_Z24do_handle_one_connectionP3THD+0x15f)[0x6f6a2f]
      /opt/percona_server/5.6.34/bin/mysqld(handle_one_connection+0x47)[0x6f6b17]
      /opt/percona_server/5.6.34/bin/mysqld(pfs_spawn_thread+0x143)[0x936913]
      /lib/x86_64-linux-gnu/libpthread.so.0(+0x8184)[0x7f902c2cb184]
      /lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)[0x7f902a53237d]

      Trying to get some variables.
      Some pointers may be invalid and cause the dump to abort.
      Query (7f900c822010): select * from `information_schema`.`table_statistics` `s` where utility_get_global_variable('userstat')='ON'
      Connection ID (thread ID): 1
      Status: NOT_KILLED

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                Reporter:
                lpjirasync lpjirasync (Inactive)
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                • Created:
                  Updated:
                  Resolved: