Here is a list of things you should consider in case you want to run JServ on jdk1.2:

1. set permissions granting reading access to all class files AND properties files you use in any of your servlet zones.
2. set permissions granting ClassLoader creation
3. set permissions granting socket listening and accepting rights

Following will guide you doing this:

• The /security/permissions.html
• The /security/PolicyFiles.html
• Following example:

grant codeBase "file:/path/to/ApacheJServ.jar" {        //will grant this rights only to JServ
        
        //FileRead Permissions to class files that should be loaded via
        //the the JServ class loader.
        //(e.g: anything you refered to in any zones repository property).
        //Note:
        //The $quot;/-" means that the permission is granted recursive
        //for anything in the named directory.
        permission java.io.FilePermission "/path/to/classes/or/jars/-", "read";

        //FileRead Permissions to .properties files
        permission java.io.FilePermission "/path/to/properties/-", "read";

        //FileRead Permissions to any properties loaded by any of your own servlets/classes
        //that are in turn loaded by the JServ ClassLoader.
        //(eg. anything you referred to in any zones repository property)
        permission java.io.FilePermission "/path/to/zone/configdir/.properties" , "read";

        
        //....I guess you got somehow.
        
        //ClassLoader creation permission to allow JServ deploying its own
        //ClassLoader.
        permission java.lang.RuntimePermission "createClassLoader";
        
        //Socket listening and accepting permissions
        permission java.net.SocketPermission "*:","connect,accept,listen,resolve";
};

A note on how to find the system policy file:
it is obviously by default located at

        /lib/security/java.policy  (Solaris)
        /jre/lib/security/java.policy (Linux JDK1.2 pre-v2 from  Blackdown.org)
        \lib\security\java.policy  (Windows)