How to check the environment variables on Windows

  1. Right click My Computer.
  2. Select Properties.
  3. Select Advanced tab.
  4. Select Environment Variables.

You will see a list of variables. What you need is either a JRE_HOME or JAVA_HOME variable, depending on the type of Java engine you are running.

If the correct variable is present, please check that it targets the correct folder.

If the desired variable is not present, create it like this:

  • If you have a JRE, create or update the environment variable JRE_HOME. Set it to target the folder where your Java JRE is, for example C:\Program Files\Java\jre1.6.0_14.
  • If you have a JDK, create or update the environment variable JAVA_HOME. Set it to target the folder where your Java JDK is, for example C:\Program Files\Java\jdk1.6.0_14.

Once you have done that, try to launch OpenSearchServer again with start.bat.

If you have Java but do not see the variable and do not remember whether you have a JDK or a JRE:

  • Go to the Start menu
  • Click Run
  • Type cmd to call up the command line interface
  • Type java -version to see what's installed.

Checking whether your 8080 port is free

If, by chance, you already have a server listening on the 8080 tcp port you'll have to change it in the Catalina config files.

To check whether the 8080 port is already occupied use the following command line: netstat -o -n -a

If you have a response like the one below, your port is not free:


If port 8080 is already being used, we suggest that you simply use another port for ISS. To do so:

  • In your OpenSearchServer folder, open the file apache-tomcat-6.0.20/conf/server.xml
  • Locate the line starting with: <Connector port="8080" ... and then change it to <connector port="8081" ...
  • Save your file and restart OpenSearchServer with start.bat
  • Your OpenSearchServer Back Office is now available at this address: http://localhost:8081

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