Thread 99 (LWP 3470):
#01  0x00007f12b6ff1b6d in __fsync_nocancel () from /lib/x86_64-linux-gnu/libpthread-2.23.so
#02  0x00000000012dc56b in file_fsync_internal () from /home/ubuntu/src/tokudb/storage/tokudb/PerconaFT/portability/file.cc:422
#03  0x00000000012901b1 in toku_logger_maybe_fsync () from /home/ubuntu/src/tokudb/storage/tokudb/PerconaFT/ft/logger/logger.cc:797
#04  0x00000000012902b1 in toku_logger_fsync () from /home/ubuntu/src/tokudb/storage/tokudb/PerconaFT/ft/logger/logger.cc:533
#05  0x000000000128001c in env_log_flush () from /home/ubuntu/src/tokudb/storage/tokudb/PerconaFT/src/ydb.cc:1248
#06  0x00000000013029cb in tokudb_flush_logs () from /home/ubuntu/src/tokudb/storage/tokudb/hatoku_hton.cc:768
#07  0x0000000000812c7f in flush_handlerton () from /home/ubuntu/src/tokudb/sql/handler.cc:2607
#08  0x0000000000cb7279 in plugin_foreach_with_mask () from /home/ubuntu/src/tokudb/sql/sql_plugin.cc:2318
#09  0x0000000000819f0a in ha_flush_logs () from /home/ubuntu/src/tokudb/sql/handler.cc:2617
#10  0x0000000000e5e33b in MYSQL_BIN_LOG::process_flush_stage_queue () from /home/ubuntu/src/tokudb/sql/binlog.cc:8527
#11  0x0000000000e5e504 in MYSQL_BIN_LOG::ordered_commit () from /home/ubuntu/src/tokudb/sql/binlog.cc:9175
#12  0x0000000000e5fd14 in MYSQL_BIN_LOG::commit () from /home/ubuntu/src/tokudb/sql/binlog.cc:8426
#13  0x0000000000819172 in ha_commit_trans () from /home/ubuntu/src/tokudb/sql/handler.cc:1818
#14  0x0000000000d40759 in trans_commit () from /home/ubuntu/src/tokudb/sql/transaction.cc:239
#15  0x0000000000c90db4 in mysql_execute_command () from /home/ubuntu/src/tokudb/sql/sql_parse.cc:4474
#16  0x0000000000c9657d in mysql_parse () from /home/ubuntu/src/tokudb/sql/sql_parse.cc:5838
#17  0x0000000000c9761c in dispatch_command () from /home/ubuntu/src/tokudb/sql/sql_parse.cc:1447
#18  0x0000000000c98abf in do_command () from /home/ubuntu/src/tokudb/sql/sql_parse.cc:1010
#19  0x0000000000d5f058 in handle_connection () from /home/ubuntu/src/tokudb/sql/conn_handler/connection_handler_per_thread.cc:312
#20  0x00000000013c5854 in pfs_spawn_thread () from /home/ubuntu/src/tokudb/storage/perfschema/pfs.cc:2188
#21  0x00007f12b6fe86fa in start_thread () from /lib/x86_64-linux-gnu/libpthread-2.23.so