tair启动dataserver报错

[parallels@centos-7-va tair_bin]$ sudo sh set_shm.sh
[sudo] password for parallels:
[parallels@centos-7-va tair_bin]$
[parallels@centos-7-va tair_bin]$
[parallels@centos-7-va tair_bin]$ sh tair.sh start_ds
tair.sh: line 50: let: safety_size = 904
919
919
919
184
184 - 500: syntax error in expression (error token is "919
919
919
184
184 - 500")
mdb engine. tmpfs_size: 904 919 919 919 184 184  safety_size: 904  slab_mem_size: 512
[parallels@centos-7-va tair_bin]$ sh tair.sh start_cs program has been exist: pid=30503
[parallels@centos-7-va tair_bin]$ pgrep -lf tair 30503 tair_cfg_svr
[parallels@centos-7-va tair_bin]$
[parallels@centos-7-va tair_bin]$
启动 dataserver的时候报这个错是什么原因？