Mattermost loadtest server error

Hi Team,

I have setup MM loadtest server getting error.
[2017/01/04 19:34:42 UTC] [DEBG] /api/v3/users/websocket
[2017/01/04 19:34:42 UTC] [EROR] Invalid session token=88sc7yshitdn8mbpk6d8q13eqc, err=sessionIdOrToken=88sc7yshitdn8mbpk6d8q13eqc
[2017/01/04 19:34:42 UTC] [DEBG] websocket.read: closing websocket for userId= error=read tcp 172.17.0.3:8065->35.162.200.186:45972: use of closed network connection
[2017/01/04 19:34:42 UTC] [DEBG] /api/v3/users/websocket
[2017/01/04 19:34:42 UTC] [EROR] Invalid session token=fan3mfztgbnwucm8ekeyuu15cy, err=sessionIdOrToken=fan3mfztgbnwucm8ekeyuu15cy
[2017/01/04 19:34:42 UTC] [DEBG] websocket.read: closing websocket for userId= error=read tcp 172.17.0.3:8065->35.162.200.186:45974: use of closed network connection
[2017/01/04 19:34:42 UTC] [DEBG] /api/v3/users/websocket
[2017/01/04 19:34:42 UTC] [EROR] Invalid session token=ny7i9m9w9inr38r71orj4cfk5o, err=sessionIdOrToken=ny7i9m9w9inr38r71orj4cfk5o
[2017/01/04 19:34:42 UTC] [DEBG] websocket.read: closing websocket for userId= error=read tcp 172.17.0.3:8065->35.162.200.186:45976: use of closed network connection
[2017/01/04 19:34:42 UTC] [DEBG] /api/v3/users/websocket
[2017/01/04 19:34:42 UTC] [EROR] Invalid session token=4buseq5qwfyx8mktbk7asi7csh, err=sessionIdOrToken=4buseq5qwfyx8mktbk7asi7csh
[2017/01/04 19:34:42 UTC] [DEBG] websocket.read: closing websocket for userId= error=read tcp 172.17.0.3:8065->35.162.200.186:45978: use of closed network connection
[2017/01/04 19:34:42 UTC] [DEBG] /api/v3/users/websocket
[2017/01/04 19:34:42 UTC] [EROR] Invalid session token=k745zrpqkt8o3jqdmu84tksshh, err=sessionIdOrToken=k745zrpqkt8o3jqdmu84tksshh
[2017/01/04 19:34:42 UTC] [DEBG] websocket.read: closing websocket for userId= error=read tcp 172.17.0.3:8065->35.162.200.186:45980: use of closed network connection