1.查看Nginx日志
fztree@x2:/var/log$ less /var/log/nginx/gitlab_error.log
2015/09/06 03:27:31 [error] 2825#0: *1 upstream prematurely closed connection while reading response header from upstream, client: 192.168.1.
git/gitlab/tmp/sockets/gitlab.socket:/users/sign_in", host: "git.x2ray.com"
2.查看Gitlab日志
fztree@x2:/var/log$ grep -i error /home/git/gitlab/log/*
/home/git/gitlab/log/unicorn.stderr.log:E, [2015-09-06T03:07:51.239370 #22645] ERROR -- : worker=1 PID:22654 timeout (31s > 30s), killing
/home/git/gitlab/log/unicorn.stderr.log:E, [2015-09-06T03:07:51.294775 #22645] ERROR -- : reaped #<Process::Status: pid 22654 SIGKILL (signal 9)> worker=1
/home/git/gitlab/log/unicorn.stderr.log:E, [2015-09-06T03:08:13.318498 #22645] ERROR -- : worker=3 PID:22659 timeout (31s > 30s), killing
/home/git/gitlab/log/unicorn.stderr.log:E, [2015-09-06T03:08:13.346099 #22645] ERROR -- : reaped #<Process::Status: pid 22659 SIGKILL (signal 9)> worker=3
/home/git/gitlab/log/unicorn.stderr.log:E, [2015-09-06T03:12:43.073807 #1258] ERROR -- : worker=3 PID:1273 timeout (31s > 30s), killing
/home/git/gitlab/log/unicorn.stderr.log:E, [2015-09-06T03:12:43.108270 #1258] ERROR -- : reaped #<Process::Status: pid 1273 SIGKILL (signal 9)> worker=3
/home/git/gitlab/log/unicorn.stderr.log:E, [2015-09-06T03:13:06.134437 #1258] ERROR -- : worker=2 PID:1270 timeout (31s > 30s), killing
/home/git/gitlab/log/unicorn.stderr.log:E, [2015-09-06T03:13:06.167529 #1258] ERROR -- : reaped #<Process::Status: pid 1270 SIGKILL (signal 9)> worker=2
/home/git/gitlab/log/unicorn.stderr.log:E, [2015-09-06T03:13:32.192052 #1258] ERROR -- : worker=3 PID:1688 timeout (31s > 30s), killing
/home/git/gitlab/log/unicorn.stderr.log:E, [2015-09-06T03:13:32.212659 #1258] ERROR -- : reaped #<Process::Status: pid 1688 SIGKILL (signal 9)> worker=3
3.OH, forgot
bundle exec rake assets:precompile RAILS_ENV=production