main.xa failed in buildbot

main.xa 'xtradb'                         w9 [ fail ]

        Test ended at 2017-01-06 12:26:43

CURRENT_TEST: main.xa

mysqltest: At line 367: query 'reap' failed with wrong errno 1205: 'Lock wait timeout exceeded; try restarting transaction', instead of 1213...

The result from queries just before the failure was:

< snip >

DROP TABLE t1;

#

# Bug#12352846 - TRANS_XA_START(THD*):

#                ASSERTION THD->TRANSACTION.XID_STATE.XID.IS_NULL()

#                FAILED 

#

DROP TABLE IF EXISTS t1, t2;

CREATE TABLE t1 (a INT) ENGINE=InnoDB;

CREATE TABLE t2 (a INT) ENGINE=InnoDB;

START TRANSACTION;

INSERT INTO t1 VALUES (1);

# Connection con2

XA START 'xid1';

# Sending:

INSERT INTO t2 SELECT a FROM t1;

# Connection default

# Waiting until INSERT ... is blocked

DELETE FROM t1;

# Connection con2

# Reaping: INSERT INTO t2 SELECT a FROM t1