Hi all,

Not sure if MariaDB is even supported, but for those who use it:

Today I run into an issue with the latest MariaDB on CentOS7 (it was upgraded 
from 5.5.41 -> 5.5.44). After the upgrade I could no longer install CloudStack 
due to the following error (traced it to this file by executing all steps 
manually):

---
[root@cs3 db]# mysql cloud < 
/data/git/cs3/cloudstack/developer/target/db/db/schema-421to430.sql
ERROR 2013 (HY000) at line 114: Lost connection to MySQL server during query

Trying to get some variables.
Some pointers may be invalid and cause the dump to abort.
Query (0x7fc8909cd318): UPDATE `cloud`.`configuration` SET value = 
CONCAT("*.",(SELECT `temptable`.`value` FROM (SELECT * FROM 
`cloud`.`configuration` WHERE `name`="consoleproxy.url.domain") AS `temptable` 
WHERE `temptable`.`name`="consoleproxy.url.domain")) WHERE 
`name`="consoleproxy.url.domain"
Connection ID (thread ID): 10
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=off,table_elimination=on,extended_keys=off

The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains
information that should help you find out what is causing the crash.
---

The MySQL server crashed, then restarted. I haven't debugged it further but a 
downgrade works:

systemctl stop mariadb
yum remove mariadb-libs
yum install mariadb-1:5.5.41-2.el7_0.x86_64
yum install mariadb-server-1:5.5.41-2.el7_0.x86_64
systemctl start mariadb

Just in case someone else runs into it.

Regards,
Remi

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