Unable connect to confluence

[WHK]

My confluence works fine, but when restart phicical server does not work.

I try start service:

[root@server logs]# service confluence start

To run Confluence in the foreground, start the server with start-confluence.sh -fg
executing using dedicated user: confluence
If you encounter issues starting up Confluence, please see the Installation guide at http://confluence.atlassian.com/display/DOC/Confluence+Installation+Guide

Server startup logs are located in /opt/atlassian/confluence/logs/catalina.out
Using CATALINA_BASE:   /opt/atlassian/confluence
Using CATALINA_HOME:   /opt/atlassian/confluence
Using CATALINA_TMPDIR: /opt/atlassian/confluence/temp
Using JRE_HOME:        /opt/atlassian/confluence/jre/
Using CLASSPATH:       /opt/atlassian/confluence/bin/bootstrap.jar:/opt/atlassian/confluence/bin/tomcat-juli.jar
Using CATALINA_PID:    /opt/atlassian/confluence/work/catalina.pid
Tomcat started.

And the port is opened correctely:

[root@server /]# ps -aux | grep confluence
conflue+   850 27.6 82.4 4056880 1552664 ?     Sl   14:51   3:33 /opt/atlassian/confluence/jre//bin/java -Djava.util.logging.config.file=/opt/atlassian/confluence/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djdk.tls.ephemeralDHKeySize=2048 -Xms1024m -Xmx1024m -XX:+UseG1GC -Datlassian.plugins.enable.wait=300 -Djava.awt.headless=true -Xloggc:/opt/atlassian/confluence/logs/gc-2016-09-17_14-51-27.log -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=5 -XX:GCLogFileSize=2M -XX:-PrintGCDetails -XX:+PrintGCDateStamps -XX:-PrintTenuringDistribution -Djava.endorsed.dirs=/opt/atlassian/confluence/endorsed -classpath /opt/atlassian/confluence/bin/bootstrap.jar:/opt/atlassian/confluence/bin/tomcat-juli.jar -Dcatalina.base=/opt/atlassian/confluence -Dcatalina.home=/opt/atlassian/confluence -Djava.io.tmpdir=/opt/atlassian/confluence/temp org.apache.catalina.startup.Bootstrap start
root      2672  0.0  0.0 112668   972 pts/0    S+   15:04   0:00 grep --color=auto confluence

[root@server /]# netstat -noa | grep 8090
tcp       11      0 0.0.0.0:8090            0.0.0.0:*               LISTEN      keepalive (0,09/0/0)
tcp        0      0 192.168.122.10:8090     10.8.0.10:52132         SYN_RECV    on (3,69/2/0)
tcp      366      0 127.0.0.1:8090          127.0.0.1:36380         CLOSE_WAIT  off (0.00/0/0)
tcp      314      0 127.0.0.1:8090          127.0.0.1:36466         CLOSE_WAIT  off (0.00/0/0)
tcp      312      0 127.0.0.1:8090          127.0.0.1:36428         CLOSE_WAIT  off (0.00/0/0)
tcp      312      0 127.0.0.1:8090          127.0.0.1:36436         CLOSE_WAIT  off (0.00/0/0)
tcp      314      0 127.0.0.1:8090          127.0.0.1:36514         CLOSE_WAIT  off (0.00/0/0)
tcp      316      0 127.0.0.1:8090          127.0.0.1:36524         CLOSE_WAIT  off (0.00/0/0)
tcp        1      0 192.168.122.10:8090     10.8.0.10:51692         CLOSE_WAIT  off (0.00/0/0)
tcp      368      0 127.0.0.1:8090          127.0.0.1:36414         CLOSE_WAIT  off (0.00/0/0)
tcp      584      0 192.168.122.10:8090     10.8.0.13:51872         CLOSE_WAIT  off (0.00/0/0)
tcp      314      0 127.0.0.1:8090          127.0.0.1:36484         CLOSE_WAIT  off (0.00/0/0)
tcp      366      0 127.0.0.1:8090          127.0.0.1:36384         CLOSE_WAIT  off (0.00/0/0)

But the browser is freeze in "sending request".

The firewall (firewalld and iptables) is down.

Other request works fine:

• http://192.168.122.10/ -> it works! (apache2)
• http://192.168.122.10:8090/ -> freeze

Whats happens?

[noamdah]

By the information provided everything looks good.
Another good way to check out the status of your confluence state is by going to this URL:
http://<url>/status
As you have mentioned that after 10 minutes everything looks ok, this is usual especially in big envs as confluence takes a while to start up especially after a reboot.
To reduce startup time go you can add more resources to the server. (CPU / RAM)

Another thing is when seeing the "freezes" as you have mentioned that could also be due to confluence database connection.
If this keeps on happening and is affecting your work/users raise a support ticket at Atlassian Support.

[WHK]

Finally the confluence works after 10 minutes of starting. Why it happened?