read tcp 172.30.14.250:37266->10.8.8.87:10090: i/o timeout

Hi, i got some `read tcp xxxx->xxx i/o timeout` error with golang application on `alpine:3.4` image.
And the same golang application works well on centos host, no `read tcp 172.30.14.250:37266->10.8.8.87:10090: i/o timeout` error.
my Dockerfile is:
```
FROM alpine:3.4
COPY files/ /
ADD start.sh /
CMD ["bash","/start.sh"]
```
and start.sh is:
```
#!/bin/bash
/app --logtostderr=true -v=800 /config.ini
```

Am i misconfigured something? or should i configure something? i.e. max openfiles?

Realy need your help.