wsrep.foreign_key, wsrep.pool_of_threads, wsrep.mdev_6832 fail sporadically in buildbot

wsrep.foreign_key 'innodb_plugin'        w3 [ fail ]

        Test ended at 2015-04-04 01:49:53

CURRENT_TEST: wsrep.foreign_key

Failed to start mysqld.1

mysqltest failed but provided no output

 - saving '/run/shm/var/3/log/wsrep.foreign_key-innodb_plugin/' to '/run/shm/var/log/wsrep.foreign_key-innodb_plugin/'

Retrying test wsrep.foreign_key, attempt(2/3)...

worker[3] > Restart  - not started

***Warnings generated in error logs during shutdown after running tests: wsrep.foreign_key

150404  1:49:51 [ERROR] mysqld got signal 11 ;

Attempting backtrace. You can use the following information to find out

wsrep.foreign_key 'innodb_plugin'        worker[3] > Restart [mysqld.1 - pid: 30605, winpid: 30605] - running with different options '--log-bin=master-bin --binlog-format=row --innodb_autoinc_lock_mode=2 --wsrep-provider=/usr/lib/galera/libgalera_smm.so --wsrep-cluster-address=gcomm://' != '--ignore-builtin-innodb --plugin-load-add=ha_innodb.so --innodb --innodb-cmpmem --innodb-cmp-per-index --innodb-trx --innodb-locks --innodb-buffer-pool-stats --innodb-buffer-page --innodb-buffer-page-lru --innodb-sys-foreign --innodb-sys-foreign-cols --innodb-sys-tables --innodb-metrics --log-bin=master-bin --binlog-format=row --innodb_autoinc_lock_mode=2 --wsrep-provider=/usr/lib/galera/libgalera_smm.so --wsrep-cluster-address=gcomm://'

w3 [ retry-pass ]     12