innodb_zip.wl6501_1, parts.partition_debug_innodb fail in buildbot with errno 2001: 'Can't create UNIX socket (24)'

innodb_zip.wl6501_1 'xtradb'             w2 [ fail ]

        Test ended at 2016-09-25 14:42:55

CURRENT_TEST: innodb_zip.wl6501_1

mysqltest: At line 448: query 'show status' failed with wrong errno 2001: 'Can't create UNIX socket (24)', instead of 0...

The result from queries just before the failure was:

< snip >

select count(*) from t3;

count(*)

0

select count(*) from t4;

count(*)

3

select count(*) from t5;

ERROR 42S02: Table 'test.t5' doesn't exist

select count(*) from t6;

count(*)

3

set session debug="+d,ib_trunc_crash_after_redo_log_write_complete";

Warnings:

Warning	1287	'@@debug' is deprecated and will be removed in a future release. Please use '@@debug_dbug' instead

"---debug ib_trunc_crash_after_redo_log_write_complete point---"

# Write file to make mysql-test-run.pl expect crash and restart

# Run the crashing query

truncate table t4;

ERROR HY000: Lost connection to MySQL server during query

# Restart the MySQL server

More results from queries before failure can be found in /mnt/buildbot/build/mariadb-10.2.2/mysql-test/var/2/log/wl6501_1.log

 - saving '/mnt/buildbot/build/mariadb-10.2.2/mysql-test/var/2/log/innodb_zip.wl6501_1-xtradb/' to '/mnt/buildbot/build/mariadb-10.2.2/mysql-test/var/log/innodb_zip.wl6501_1-xtradb/'

Retrying test innodb_zip.wl6501_1, attempt(2/3)...

parts.partition_debug_innodb 'xtradb'    w1 [ fail ]

        Test ended at 2016-09-25 17:02:48

CURRENT_TEST: parts.partition_debug_innodb

mysqltest: In included file "./include/wait_until_connected_again.inc": 

included from ./suite/parts/inc/partition_crash.inc at line 22:

included from ./suite/parts/inc/partition_crash_change.inc at line 10:

included from ./suite/parts/inc/partition_mgm_crash.inc at line 33:

included from /mnt/buildbot/build/mariadb-10.2.2/mysql-test/suite/parts/t/partition_debug_innodb.test at line 69:

At line 23: query 'show status' failed with wrong errno 2001: 'Can't create UNIX socket (24)', instead of 0...

The result from queries just before the failure was:

< snip >

a	b

1	Original from partition p0

11	Original from partition p1

12	Original from partition p1

13	Original from partition p1

14	Original from partition p1

2	Original from partition p0

3	Original from partition p0

4	Original from partition p0

ALTER TABLE t1 REORGANIZE PARTITION p10 INTO

(PARTITION p10 VALUES IN (10,11,12,13,14,15,16,17,18,19),

PARTITION p20 VALUES IN (20,21,22,23,24,25,26,27,28,29));

ERROR HY000: Lost connection to MySQL server during query

# State after crash (before recovery)

#sql-t1.frm

#sql-t1.par

t1#P#p0.ibd

t1#P#p10.ibd

t1.frm

t1.par