First, make sure you have the version of Java that you will need. To find out what version of Java is currently installed, enter
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> java -version
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The Agent will run using the 32 bit version of Java 6, 7 and 8. We have found that in some cases the ciphers on the SSL are not compatible with Java 6. Updating to Java 7 may resolve SSL handshake errors that may be occurring.
If you have the correct version of Java, please skip to the next section
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We recommend using the latest version of Java based on your Linux/Unix distribution. To download the correct version, select the link on Oracle's website for Java. Then, if your operating system is not automatically detected, select "All Java Downloads" and navigate to the latest version of Java for your distribution. Download that version, and install it according to the instructions for your Linux distribution. Using your distribution's conventional method for application installation will help to make certain that the application is installed using the most secure method.
The following sample instructions were written using Version 6 Update 3 of Java and the Centos 5 distribution of Linux.
In this example, the jre-6u3-linux-i586-rpm.bin is used.
Once it has been downloaded, make the Java installer executable by entering this line: chmod +x [name of installer]
For example:
chmod +x jre-6u3-linux-i586-rpm.bin
Run the .bin file. If you are in the directory with the installer you can do this by entering this line: ./jre-6u3-linux-i586-rpm.bin
At this point, the java --version still appears as 1.4. To correct this, remove the existing symbolic link pointing to java and create a new one pointing to the new java that was just installed.
In this example there is a symbolic link to java in /etc/alternatives/. In that directory, remove the existing java symbolic link.
cd /etc/alternatives
rm java
Create a new symbolic link pointing to the new java. For example:
ln -s /usr/java/jre1.6.0_13/bin/java /etc/alternatives/java
Please note that this path is relative to the version of Java being installed.
Now the "java -version" command will bring up the new version of java that has just been installed.
This completes the steps you need to take to make sure the correct version of Java is installed.
Otherwise visit Oracle Java SE Downloads to locate and install the appropriate version for your platform.
Java 8
It was found that the most current version of Java 8 on the SIF Agent server caused an incompatibility issue with the ZIS, with the ZIS being on another server running Java 7. The ZIS would not communicate with the SIF Agent. Installing Java 8 update 152 resolve this issue.