innodb.innodb_bug56143, main.type_bit_innodb, main.subselect_sj2_jcl6, innodb_fts.innodb_fts_plugin failed in buildbot with semaphore waiting warnings

innodb.innodb_bug56143 'xtradb'          w10 [ fail ]  Found warnings/errors in server log file!

        Test ended at 2017-01-10 14:59:02

line

InnoDB: Warning: Writer thread is waiting this semaphore:

InnoDB: Warning: Writer thread is waiting this semaphore:

InnoDB: Warning: Writer thread is waiting this semaphore:

^ Found warnings in /dev/shm/var/10/log/mysqld.1.err

main.type_bit_innodb 'xtradb'            w17 [ fail ]  Found warnings/errors in server log file!

        Test ended at 2017-01-08 19:28:05

line

InnoDB: Warning: Writer thread is waiting this semaphore:

InnoDB: Warning: Writer thread is waiting this semaphore:

^ Found warnings in /dev/shm/var/17/log/mysqld.1.err