federated.federatedx, federated.federated_innodb, federated.federated_transactions fail sporadically in buildbot

federated.federatedx 'X'                 w4 [ fail ]

        Test ended at 2016-08-05 04:04:51

CURRENT_TEST: federated.federatedx

--- /var/lib/buildbot/maria-slave/p8-xenial-bintar/build/mysql-test/suite/federated/federatedx.result	2016-08-05 03:18:19.566373832 -0400

+++ /var/lib/buildbot/maria-slave/p8-xenial-bintar/build/mysql-test/suite/federated/federatedx.reject	2016-08-05 04:04:51.357163484 -0400

@@ -2213,7 +2213,7 @@

 CONNECTION='mysql://root@127.0.0.1:SLAVE_PORT/test/t1';

 CHECKSUM TABLE t1;

 Table	Checksum

-test.t1	2465757603

+test.t1	229274939

 connection slave;

 DROP TABLE t1;

 connection master;

mysqltest: Result length mismatch

federated.federatedx 'X'                 w3 [ fail ]

        Test ended at 2016-06-29 07:51:30

CURRENT_TEST: federated.federated_partition

CURRENT_TEST: federated.federated_partition

CURRENT_TEST: federated.assisted_discovery

CURRENT_TEST: federated.federatedx

Failed to start mysqld.1

federated.federated_transactions 'X,xtradb' w4 [ fail ]

        Test ended at 2016-08-14 09:36:20

CURRENT_TEST: federated.federated_transactions

mysqltest: At line 37: query 'DELETE FROM federated.t1' failed: 1159: Got timeout reading communication packets

The result from queries just before the failure was:

< snip >

    )

ENGINE="FEDERATED" DEFAULT CHARSET=latin1

CONNECTION='mysql://root@127.0.0.1:SLAVE_PORT/federated/t1';

set autocommit=0;

INSERT INTO federated.t1 (id, name) VALUES (1, 'foo');

INSERT INTO federated.t1 (id, name) VALUES (2, 'fee');

COMMIT;

INSERT INTO federated.t1 (id, name) VALUES (3, 'fie');

INSERT INTO federated.t1 (id, name) VALUES (4, 'fum');

ROLLBACK;

set autocommit=1;

INSERT INTO federated.t1 (id, name) VALUES (5, 'foe');

INSERT INTO federated.t1 (id, name) VALUES (6, 'fig');

SELECT * FROM federated.t1;

id	name

1	foo

2	fee

5	foe

6	fig

DELETE FROM federated.t1;