You can use IPv4 as default instead of IPv6.

IPv4 instead of IPv6

The easiest way is to change the JAVA_OPTS variable.

Edit your Tomcat launcher (instance) script:

# Package installation
vim /etc/default/tomcat7

# Manual installation, Tomcat instance
vim /etc/init.d/tomcat8

Adjust your JAVA_OPTS line, add -Djava.net.preferIPv4Stack=true

JAVA_OPTS="${JAVA_OPTS} -Djava.net.preferIPv4Stack=true"

Take changes into account

service tomcat7 restart

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