sys_vars.keep_files_on_create_basic failed with timeout in buildbot

10.1	9c9747fed3e1c1a7838e45c71983a3c4	kvm-bintar-centos5-amd64	2016-05-18 12:12:19	2915	mtr		sys_vars.keep_files_on_create_basic		timeout after 900 seconds

sys_vars.keep_files_on_create_basic      w4 [ fail ]  timeout after 900 seconds

        Test ended at 2016-05-18 12:13:03

Test case timeout after 900 seconds

== /usr/local/mariadb-10.1.15-linux-x86_64/mysql-test/var/4/log/keep_files_on_create_basic.log == 

SELECT @@local.keep_files_on_create = @@session.keep_files_on_create;

@@local.keep_files_on_create = @@session.keep_files_on_create

1

'#---------------------FN_DYNVARS_001_10----------------------#'

SET keep_files_on_create = 1;

SELECT @@keep_files_on_create;

@@keep_files_on_create

1

SELECT local.keep_files_on_create;

ERROR 42S02: Unknown table 'local' in field list

SELECT session.keep_files_on_create;

ERROR 42S02: Unknown table 'session' in field list

SELECT keep_files_on_create = @@session.keep_files_on_create;

ERROR 42S22: Unknown column 'keep_files_on_create' in 'field list'

SET @@global.keep_files_on_create = @start_global_value;

SELECT @@global.keep_files_on_create;

@@global.keep_files_on_create

0

SET @@session.keep_files_on_create = @start_session_value;

SELECT @@session.keep_files_on_create;

 == /usr/local/mariadb-10.1.15-linux-x86_64/mysql-test/var/4/tmp/analyze-timeout-mysqld.1.err ==

mysqltest: Could not open connection 'default' after 500 attempts: 2002 Can't connect to local MySQL server through socket '/usr/local/mariadb-10.1.15-linux-x86_64/mysql-test/var/tmp/4/mysqld.1.sock' (111 "Connection refused")

 - skipping '/usr/local/mariadb-10.1.15-linux-x86_64/mysql-test/var/4/log/sys_vars.keep_files_on_create_basic/'

Retrying test sys_vars.keep_files_on_create_basic, attempt(2/3)...

worker[4] > Restart  - not started