rpl.rpl_semi_sync_event 'innodb_plugin,row' sporadically produces warnings in buildbot on P8

rpl.rpl_semi_sync_event 'innodb_plugin,row' w2 [ pass ]  25556

worker[2] > Restart [mysqld.1 - pid: 12005, winpid: 12005] - running with different options '--binlog-format=row --ignore-builtin-innodb --plugin-load=ha_innodb.so --innodb --innodb-cmpmem --innodb-trx --innodb-buffer-pool-stats --innodb-buffer-page --innodb-buffer-page-lru --log-bin=master-bin' != '--binlog-format=row --ignore-builtin-innodb --plugin-load=ha_innodb.so --innodb --innodb-cmpmem --innodb-trx --innodb-buffer-pool-stats --innodb-buffer-page --innodb-buffer-page-lru --log-bin=master-bin --max-connections=40'

worker[2] > Restart [mysqld.2 - pid: 12012, winpid: 12012] - running with different options '--binlog-format=row --ignore-builtin-innodb --plugin-load=ha_innodb.so --innodb --innodb-cmpmem --innodb-trx --innodb-buffer-pool-stats --innodb-buffer-page --innodb-buffer-page-lru --log-bin=slave-bin --loose-innodb-lock-wait-timeout=4 --slave-transaction-retries=2 --max-relay-log-size=4096' != '--binlog-format=row --ignore-builtin-innodb --plugin-load=ha_innodb.so --innodb --innodb-cmpmem --innodb-trx --innodb-buffer-pool-stats --innodb-buffer-page --innodb-buffer-page-lru --log-bin=slave-bin'

***Warnings generated in error logs during shutdown after running tests: rpl.rpl_semi_sync_event

Warning:  520 bytes lost, allocated at sql/rpl_handler.cc:266, sql/log.cc:6053, sql/log.cc:5893, sql/log.cc:5856, sql/log.cc:1661, sql/log.cc:1741, sql/log.cc:7470, sql/handler.cc:1322

CURRENT_TEST: rpl.rpl_semi_sync_event

150416  6:42:49 [Note] Plugin 'XTRADB_ADMIN_COMMAND' is disabled.

150416  6:42:49 [Note] Plugin 'partition' is disabled.

150416  6:42:49 InnoDB: !!!!!!!! UNIV_DEBUG switched on !!!!!!!!!

150416  6:42:49 InnoDB: The InnoDB memory heap is disabled

150416  6:42:49 InnoDB: Mutexes and rw_locks use GCC atomic builtins

150416  6:42:49 InnoDB: Compressed tables use zlib 1.2.8

150416  6:42:49 InnoDB: Using Linux native AIO

150416  6:42:49 InnoDB: Initializing buffer pool, size = 8.0M

150416  6:42:49 InnoDB: Completed initialization of buffer pool

InnoDB: The first specified data file ./ibdata1 did not exist:

InnoDB: a new database to be created!

150416  6:42:49  InnoDB: Setting file ./ibdata1 size to 10 MB

InnoDB: Database physically writes the file full: wait...

150416  6:42:51  InnoDB: Log file ./ib_logfile0 did not exist: new to be created

InnoDB: Setting log file ./ib_logfile0 size to 5 MB

InnoDB: Database physically writes the file full: wait...

150416  6:42:53  InnoDB: Log file ./ib_logfile1 did not exist: new to be created

InnoDB: Setting log file ./ib_logfile1 size to 5 MB

InnoDB: Database physically writes the file full: wait...

InnoDB: Doublewrite buffer not found: creating new

InnoDB: Doublewrite buffer created

InnoDB: 127 rollback segment(s) active.

InnoDB: Creating foreign key constraint system tables

InnoDB: Foreign key constraint system tables created

150416  6:43:10  InnoDB: Waiting for the background threads to start

150416  6:43:11 InnoDB: 5.5.42-MariaDB started; log sequence number 0

150416  6:43:11 [Note] Plugin 'INNODB_LOCK_WAITS' is disabled.

150416  6:43:11 [Note] Plugin 'INNODB_CMP' is disabled.

150416  6:43:11 [Note] Plugin 'INNODB_CMP_RESET' is disabled.

150416  6:43:11 [Note] Plugin 'INNODB_CMPMEM_RESET' is disabled.

150416  6:43:11 [Warning] /home/buildbot/maria-slave/power8-vlp06-bintar-debug/build/sql/mysqld: unknown variable 'loose-feedback-user-info=mysql-test'

150416  6:43:11 [Warning] /home/buildbot/maria-slave/power8-vlp06-bintar-debug/build/sql/mysqld: unknown option '--loose-skip-innodb-buffer-pool-pages'

150416  6:43:11 [Warning] /home/buildbot/maria-slave/power8-vlp06-bintar-debug/build/sql/mysqld: unknown option '--loose-skip-innodb-buffer-pool-pages-blob'

150416  6:43:11 [Warning] /home/buildbot/maria-slave/power8-vlp06-bintar-debug/build/sql/mysqld: unknown option '--loose-skip-innodb-buffer-pool-pages-index'

150416  6:43:11 [Warning] /home/buildbot/maria-slave/power8-vlp06-bintar-debug/build/sql/mysqld: unknown option '--loose-skip-innodb-changed-pages'

150416  6:43:11 [Warning] /home/buildbot/maria-slave/power8-vlp06-bintar-debug/build/sql/mysqld: unknown option '--loose-skip-innodb-index-stats'

150416  6:43:11 [Warning] /home/buildbot/maria-slave/power8-vlp06-bintar-debug/build/sql/mysqld: unknown option '--loose-skip-innodb-rseg'

150416  6:43:11 [Warning] /home/buildbot/maria-slave/power8-vlp06-bintar-debug/build/sql/mysqld: unknown option '--loose-skip-innodb-sys-columns'

150416  6:43:11 [Warning] /home/buildbot/maria-slave/power8-vlp06-bintar-debug/build/sql/mysqld: unknown option '--loose-skip-innodb-sys-fields'

150416  6:43:11 [Warning] /home/buildbot/maria-slave/power8-vlp06-bintar-debug/build/sql/mysqld: unknown option '--loose-skip-innodb-sys-foreign'

150416  6:43:11 [Warning] /home/buildbot/maria-slave/power8-vlp06-bintar-debug/build/sql/mysqld: unknown option '--loose-skip-innodb-sys-foreign-cols'

150416  6:43:11 [Warning] /home/buildbot/maria-slave/power8-vlp06-bintar-debug/build/sql/mysqld: unknown option '--loose-skip-innodb-sys-indexes'

150416  6:43:11 [Warning] /home/buildbot/maria-slave/power8-vlp06-bintar-debug/build/sql/mysqld: unknown option '--loose-skip-innodb-sys-stats'

150416  6:43:11 [Warning] /home/buildbot/maria-slave/power8-vlp06-bintar-debug/build/sql/mysqld: unknown option '--loose-skip-innodb-sys-tables'

150416  6:43:11 [Warning] /home/buildbot/maria-slave/power8-vlp06-bintar-debug/build/sql/mysqld: unknown option '--loose-skip-innodb-sys-tablestats'

150416  6:43:11 [Warning] /home/buildbot/maria-slave/power8-vlp06-bintar-debug/build/sql/mysqld: unknown option '--loose-skip-innodb-table-stats'

150416  6:43:11 [Warning] /home/buildbot/maria-slave/power8-vlp06-bintar-debug/build/sql/mysqld: unknown option '--loose-skip-innodb-undo-logs'

150416  6:43:11 [Note] Server socket created on IP: '0.0.0.0'.

150416  6:43:11 [Note] Event Scheduler: Loaded 0 events

150416  6:43:11 [Note] /home/buildbot/maria-slave/power8-vlp06-bintar-debug/build/sql/mysqld: ready for connections.

Version: '5.5.42-MariaDB-debug-log'  socket: '/home/buildbot/maria-slave/power8-vlp06-bintar-debug/build/mysql-test/var/tmp/2/mysqld.1.sock'  port: 16040  Source distribution

150416  6:43:14 [Note] Semi-sync replication initialized for transactions.

150416  6:43:14 [Note] Semi-sync replication enabled on the master.

150416  6:43:15 [Note] Start semi-sync binlog_dump to slave (server_id: 2), pos(master-bin.000001, 1333)

150416  6:43:15 [Note] Stop asynchronous binlog_dump to slave (server_id: 2)

150416  6:43:15 [Note] Event Scheduler: scheduler thread started with id 9

150416  6:43:15 [ERROR] Read semi-sync reply network error:  (errno: 1158)

150416  6:43:15 [Note] Stop semi-sync binlog_dump to slave (server_id: 2)

150416  6:43:16 [Note] Event Scheduler: Killing the scheduler thread, thread id 9

150416  6:43:16 [Note] Event Scheduler: Waiting for the scheduler thread to reply

150416  6:43:16 [Note] Event Scheduler: Stopped

150416  6:43:25 [Warning] Timeout waiting for reply of binlog (file: master-bin.000001, pos: 2770), semi-sync up to file master-bin.000001, position 2583.

150416  6:43:25 [Note] Semi-sync replication switched OFF.

150416  6:43:25 [Note] unregister_replicator OK

150416  6:43:40 [Note] /home/buildbot/maria-slave/power8-vlp06-bintar-debug/build/sql/mysqld: Normal shutdown

150416  6:43:40 [Note] Event Scheduler: Purging the queue. 0 events

150416  6:43:40  InnoDB: Starting shutdown...

150416  6:43:43  InnoDB: Shutdown completed; log sequence number 1632968

150416  6:43:43 [Note] Debug sync points hit:                   4073

150416  6:43:43 [Note] Debug sync points executed:              0

150416  6:43:43 [Note] Debug sync points max active per thread: 0

150416  6:43:43 [Note] /home/buildbot/maria-slave/power8-vlp06-bintar-debug/build/sql/mysqld: Shutdown complete

Warning:  520 bytes lost, allocated at sql/rpl_handler.cc:266, sql/log.cc:6053, sql/log.cc:5893, sql/log.cc:5856, sql/log.cc:1661, sql/log.cc:1741, sql/log.cc:7470, sql/handler.cc:1322

Memory lost: 520 bytes in 1 chunks