Solution

You must have Java 8 installed for ESET Security Management Center 7 Web Console to function properly. Visit https://java.com/en/download/help/sysreq.xml to verify that Java 8 is compatible with your operating system. 

Install Java 8 on Windows

1. Download the Java 8 installer from the Java website.
    
2. Run the downloaded Java installer.

Install Java 8 on Debian

1. Open a new Terminal window.
    
2. Switch to the root user:
   
   sudo su
    
3. Enter the root password.
    
4. Install the default-jre package:
   
   apt-get install default-jre
    
5. Install the default-jdk package:
   
   apt-get install default-jdk
    
6. Install the software-properties-common package:
   
   apt-get install software-properties-common
    
7. Add the Ubuntu Xenial repository:
   
   add-apt-repository "deb http://ppa.launchpad.net/webupd8team/java/ubuntu xenial main"
    
8. Update the list of packages available from the repositories:
   
   apt-get update
    
9. Install the oracle-java8-installer package:
   
   apt-get install oracle-java8-installer
    
10. Verify that Java 8 is installed:
    
    dpkg -l oracle-java8-installer
     

Configure Tomcat 8 to use Java 8 on Debian

Make sure that you are logged in as root.

1. Verify that the tomcat8 package is installed:
   
   dpkg -l tomcat8
   
   If the tomcat8 package is not installed, install it:
   
   apt-get install tomcat8
    
2. Open the tomcat8 configuration file in a text editor:
   
   nano /etc/default/tomcat8
    
3. Set Java 8 as the default for Tomcat. Edit the following line:
   
   Original line:
   
   #JAVA_HOME=/usr/lib/jvm/java-8-openjdk

Edited line:

JAVA_HOME=/usr/lib/jvm/java-8-oracle
 

1. If you are working in an enterprise environment, increase the memory size for Java to 2048 MB by editing the following line:

Original line:

JAVA_OPTS="-Xms512M -Xmx1024M"

Edited line:

JAVA_OPTS="-Xms512M -Xmx2048M"
 

1. Save your changes to the tomcat8 file.
    
2. Restart the tomcat8 service:
   
   service tomcat8 restart

Upgrade Java when upgrading from ERA Virtual Appliance 6.3 to ESMC Virtual Appliance 7

When upgrading from ERA 6.3 VA to ESMC 7 Virtual Appliance, you need to update both Java and Tomcat.

Virtual Appliance Upgrade Recommendation:

The recommended way to upgrade the Virtual Appliance is to pull the database to a new appliance, to keep your OS up to date.

Log in the ERA VA virtual machine terminal as root and proceed according to steps below.

1. Update your repository:
   
   yum makecache
    
2. Install Java OpenJDK package with its dependencies
   
   yum install java-1.8.0-openjdk.x86_64
    
3. Upgrade Tomcat to the latest version:
   
   yum install tomcat
    
4. You can continue in upgrade to ESMC 7.