Online-Judge

Tools used

Programming languages: Java, JavaScript, C and Linux Shell Script (bash)
Frameworks / Libraries: Bootstrap, Jquery, Ace Editor, Ckeditor, Java Mailer(spring), Google GSON, Java Encoder OWASP, Apache Validator, Apache Commons File Upload and MySQL JDBC Connector
Server: Tomcat 9
Database: MySQL 5.7
Host OS: Ubuntu 18.04 LTS
Sandboxing: Chroot based on Ubuntu 18.04 LTS
Compilers: GCC 7.3.0, G++ 7.3.0, JDK 11(Oracle) and Python 3
Additional libraries: libseccomp-dev and software-properties-common

Edit website/src/auth/Mailer.java using your email and password after subscribing for google mail service.
Edit website/src/link/Link.java using your database credentials.
Replace path-to-workspace in web.xml with a suitable path such as home/username/Desktop.

Install JDK, Tomcat Server, MYSQL.
Setup chroot based on Ubuntu 18.04 LTS with all the compilers and addtitional libraries installed inside it.
Path of chroot should be "/cryptic_security/jail".
Place the "liboj" folder at "/" without the source folders and readme files.
Adjust the permissions of all the files in the "liboj" folder.
Binary files in "liboj/bin" folder are setuid wrappers, so, set the permissions accordingly.
Place the "java_policy" file(available in source folder of judge) inside the "/etc" folder of chroot os.
Import the database using the "database.sql" file in database folder.
Deploy the website on Tomcat Server.

Some of the known bugs are:

JQuery AJAX and prepend functions fail on Google Chrome but works on Firefox, Edge and other popular browsers.
Judge fails for first few program run initially when server is started but starts working smoothly after 2 failed attempts.