#Rpm installed #

mariadb-5.5.56-2.el7.x86_64                                 
mariadb-libs-5.5.56-2.el7.x86_64                            
mariadb-server-5.5.56-2.el7.x86_64                          

# Customer run specific query and it crash. 


Database changed
MariaDB [tcm_offline]> SELECT
    ->     *
    -> FROM
    ->     (SELECT
    ->         site_index,
    ->             turbine_id AS wt_id,
    ->             turbine_serial AS wt_serial,
    ->             turbine_name AS wt_turbine,
    ->             display_name AS wt_name,
    ->             (SELECT
    ->                     SUM(CASE
    ->                             WHEN
    ->                                 (severity = 'fault'
    ->                                     OR severity = 'emergency')
    ->                                     AND acknowledged = 'no'
    ->                                     AND syslog_events.state = 'active'
    ->                             THEN
    ->                                 1
    ->                             ELSE 0
    ->                         END)
    ->                 FROM
    ->                     syslog_events
    ->                 WHERE
    ->                     syslog_events.location_serial = turbine_serial) AS unack_syslogs,
    ->             (SELECT
    ->                     SUM(CASE
    ->                             WHEN
    ->                                 (severity = 'fault'
    ->                                     OR severity = 'emergency')
    ->                                     AND syslog_events.state = 'active'
    ->                             THEN
    ->                                 1
    ->                             ELSE 0
    ->                         END)
    ->                 FROM
    ->                     syslog_events
    ->                 WHERE
    ->                     syslog_events.location_serial = turbine_serial) AS syslogs,
    ->             (SELECT
    ->                     GROUP_CONCAT(DISTINCT syslog_events.type_name)
    ->                 FROM
    ->                     syslog_events
    ->                 WHERE
    ->                     syslog_events.location_serial = turbine_serial
    ->                         AND state = 'Active'
    ->                         AND (severity = 'fault'
    ->                         OR severity = 'emergency')) AS types,
    ->             (SELECT
    ->                     DATEDIFF(CURDATE(), MAX(after))
    ->                 FROM
    ->                     rest_measurement_registry
    ->                 WHERE
    ->                     rest_measurement_registry.serial = turbine_serial) AS measurment_is_delayed
    ->     FROM
    ->         tcm_offline.site_configuration
    ->     JOIN turbine_information ON site_index = mysqld_multi_index
    ->     WHERE
    ->         site_index = 2 AND site_index IN (1 , 2)) AS greens
    ->         LEFT JOIN
    ->     (SELECT
    ->         SUBSTRING_INDEX(SUBSTRING_INDEX(MeasurementKey, '/', 2), '/', - 1) AS turbine,
    ->             IFNULL(MAX(IF(AckStatus = 'UnAck', IF(ISNULL(ToTime), CASE
    ->                 WHEN
    ->                     AlarmType LIKE '%Red%'
    ->                         OR AlarmType LIKE 'Overrun'
    ->                 THEN
    ->                     8
    ->                 WHEN AlarmType LIKE '%Yellow%' THEN 7
    ->                 WHEN AlarmType LIKE 'Blue%' THEN 6
    ->                 ELSE 0
    ->             END, 2), IF(ISNULL(ToTime), CASE
    ->                 WHEN
    ->                     AlarmType LIKE '%Red%'
    ->                         OR AlarmType LIKE 'Overrun'
    ->                 THEN
    ->                     5
    ->                 WHEN AlarmType LIKE '%Yellow%' THEN 4
    ->                 WHEN AlarmType LIKE 'Blue%' THEN 3
    ->                 ELSE 0
    ->             END, 1))), - 1) AS severity
    ->     FROM
    ->         alarm_events
    ->     WHERE
    ->         site_index = 2 AND site_index IN (1 , 2)
    ->     GROUP BY turbine) AS alarms ON greens.wt_turbine = alarms.turbine
    -> ORDER BY measurment_is_delayed DESC , severity DESC;
ERROR 2013 (HY000): Lost connection to MySQL server during query
MariaDB [tcm_offline]>

# Crash details #

180327  6:42:02 [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.

Server version: 5.5.56-MariaDB
key_buffer_size=1073741824
read_buffer_size=131072
max_used_connections=2
max_threads=202
thread_count=2
It is possible that mysqld could use up to
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 1491713 K  bytes of memory
Hope that's ok; if not, decrease some variables in the equation.

# Stack strace, #

Thread pointer: 0x7f9193266df0
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 = 0x7f918825bdc0 thread_stack 0x48000
/usr/libexec/mysqld(my_print_stacktrace+0x3d)[0x7f918fe5996d]
/usr/libexec/mysqld(handle_fatal_signal+0x515)[0x7f918fa6f285]
/lib64/libpthread.so.0(+0xf5e0)[0x7f918f19c5e0]
/usr/libexec/mysqld(_ZN10Item_fieldC1EP5Field+0xc)[0x7f918fa8625c]
/usr/libexec/mysqld(_ZN14Item_subselect18get_tmp_table_itemEP3THD+0x66)[0x7f918faf21d6]
/usr/libexec/mysqld(_ZN20Item_direct_view_ref18get_tmp_table_itemEP3THD+0x11)[0x7f918fa93f91]
/usr/libexec/mysqld(_ZN4JOIN4execEv+0x184c)[0x7f918f98f81c]
/usr/libexec/mysqld(_Z12mysql_selectP3THDPPP4ItemP10TABLE_LISTjR4ListIS1_ES2_jP8st_orderSB_S2_SB_yP13select_resultP18st_select_lex_unitP13st_select_lex+0x119)[0x7f918f989b39]
/usr/libexec/mysqld(_Z13handle_selectP3THDP3LEXP13select_resultm+0x2db)[0x7f918f98a5fb]
/usr/libexec/mysqld(+0x36b9d9)[0x7f918f9389d9]
/usr/libexec/mysqld(_Z21mysql_execute_commandP3THD+0x45d1)[0x7f918f943001]
/usr/libexec/mysqld(_Z11mysql_parseP3THDPcjP12Parser_state+0x125)[0x7f918f9458c5]
/usr/libexec/mysqld(_Z16dispatch_command19enum_server_commandP3THDPcj+0x1753)[0x7f918f947923]
/usr/libexec/mysqld(_Z24do_handle_one_connectionP3THD+0x1c2)[0x7f918f9f9632]
/usr/libexec/mysqld(handle_one_connection+0x4a)[0x7f918f9f96da]
/lib64/libpthread.so.0(+0x7e25)[0x7f918f194e25]
/lib64/libc.so.6(clone+0x6d)[0x7f918d99234d]