Read&Write problem

Variables are shared within the same connection. If you want to use them across sessions, you'll have to reference them in the global namespace.

when HTTP_REQUEST {
  set local_var "some value"
  set ::global_var "some other value"
  log local0. "The local value is $local_var"
  log local0. "The global value is $::global_var"
}

So, the value in the HTTP_REQUeST_SEND event will be that of the associated HTTP_REQUEST event for that connection.

Be careful about using lots of global variables as they remain resident in memory until the configuration is reloaded.

-Joe