VirtualBox - Have to do the following after cloning machine

■ Make a new MAC address

■ Make a new UUID for network

$ uuidgen eth0

■ If there is the error as below.

■ Remove the 70-persistent-net.rules file.

$ rm /etc/udev/rules.d/70-persistent-net.rules

■ Check the configure file of VirtualBox

vim /home/njoonk/.config/VirtualBox/VirtualBox.xml

Troubleshooting - Content type 'application/json;charset=UTF-8' not supported

■ There was no problem when testing on Gradle JettyRun.
But After deployed an application, The following error appeared in the log file.

02 Oct 2016;02:05:58.666 [http-nio-8080-exec-6] ERROR c.a.c.AbstractBaseController.handleException(167) - Exception's trace:
org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'application/json;charset=UTF-8' not supported
    at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodArgumentResolver.readWithMessageConverters(AbstractMessageConverterMethodArgumentResolver.java:235) ~[spring-webmvc-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.readWithMessageConverters(RequestResponseBodyMethodProcessor.java:149) ~[spring-webmvc-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.resolveArgument(RequestResponseBodyMethodProcessor.java:127) ~[spring-webmvc-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:121) ~[spring-web-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at
 ...
 ...

■ How to solve this problem.
Add the jar module into build.gradle as below.

dependencies {
...
compile 'com.fasterxml.jackson.core:jackson-databind:2.8.3'
...
}

Iptables - Mapping port directly (http or https)

■ Add the following rules.
For mapping a port from 80(HTTP) to 8080 and from 443(HTTPS) to 8443

*nat
-A PREROUTING -p tcp --dport 80 -j REDIRECT --to-ports 8080
-A PREROUTING -p tcp --dport 443 -j REDIRECT --to-ports 8443
COMMIT

You don't need to set up Apache HTTP for HTTP or HTTPS
But it will not work as it is, in addition, you have to do the next step

■ Have to open 8080 and 8443 port as below

-A INPUT -m state --state NEW -m tcp -p tcp --dport 8080 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 8443 -j ACCEPT

■ This is full set up in iptables

# Firewall configuration written by system-config-firewall
# Manual customization of this file is not recommended.
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT
#-A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT
#-A INPUT -m state --state NEW -m tcp -p tcp --dport 443 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 8080 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 8443 -j ACCEPT
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
COMMIT
*nat
-A PREROUTING -p tcp --dport 80 -j REDIRECT --to-ports 8080
-A PREROUTING -p tcp --dport 443 -j REDIRECT --to-ports 8443
COMMIT

Server - Web and Hadoop Development Environment.

■ Web service Development Environment.

Host Name	Ip address	Installed software
centos01	192.168.11.20	mysql(sudo /etc/init.d/mysql.server start|stop) - njoonk tomcat(/etc/init.d/tomcat start|stop) - njoonk
centos02	192.168.11.21	nginx(/etc/init.d/nginx start|stop) - root redis(/etc/init.d/redis_6379 start|stop) - root gitlab(/etc/init.d/gitlab start|stop) - root - https://192.168.11.21
centos03	192.168.11.22	artifactory(/etc/init.d/artifactory start|stop) - root - http://192.168.11.22:8081 tomcat(/etc/init.d/tomcat start|stop) - njoonk - http://192.168.11.22:8080

■ This is my Hadoop Development Environment.

Host Name	Ip address	Installed software
hadoop01	192.168.11.23	hadoop(master name node), hbase
hadoop02	192.168.11.24	hadoop(secondary name node, data node1), zookeeper1
hadoop03	192.168.11.25	hadoop(data node2), zookeeper2, Flume1
hadoop04	192.168.11.26	hadoop(data node3), zookeeper3, Flume2
hadoop05	192.168.11.27	zookeeper, kafka

Troubleshooting - org.eclipse.osgi.internal.framework.EquinoxConfiguration$1

■I have got an error message on Eclipse as below.

■For resolving, I added the following parameters into eclipse.ini.

-Dosgi.configuration.area.default=null
-Dosgi.user.area.default=null
-Dosgi.user.area=@user.dir