我尝试重新启动Tomee和httpd，但是它可以正常工作。看来它可以访问，但是由于它给了我一个空白的白色屏幕，因此无法加载网页。
以下错误来自错误日志文件。
[Fri Jul 27 15:15:11.692355 2018] [mpm_prefork:notice] [pid 24103] AH00170:
caught SIGWINCH, shutting down gracefully
[Fri Jul 27 15:15:12.793843 2018] [core:notice] [pid 9939] SELinux policy
enabled; httpd running as context system_u:system_r:httpd_t:s0
[Fri Jul 27 15:15:12.795724 2018] [suexec:notice] [pid 9939] AH01232: suEXEC
mechanism enabled (wrapper: /usr/sbin/suexec)
[Fri Jul 27 15:15:12.850352 2018] [auth_digest:notice] [pid 9939] AH01757:
generating secret for digest authentication ...
[Fri Jul 27 15:15:12.851230 2018] [lbmethod_heartbeat:notice] [pid 9939]
AH02282: No slotmem from mod_heartmonitor
[Fri Jul 27 15:15:12.852175 2018] [ssl:warn] [pid 9939] AH01873: Init:
Session Cache is not configured [hint: SSLSessionCache]
[Fri Jul 27 15:15:12.856916 2018] [mpm_prefork:notice] [pid 9939] AH00163:
Apache/2.4.6 (Red Hat Enterprise Linux) OpenSSL/1.0.2k-fips
mod_auth_gssapi/1.5.1 mod_wsgi/3.4 Python/2.7.5 configured -- resuming
normal operations
[Fri Jul 27 15:15:12.856950 2018] [core:notice] [pid 9939] AH00094: Command
line: '/usr/sbin/httpd -D FOREGROUND'