How to check server is up?

Question

I have got a cluster of two server nodes IBM Websphere Application Server on two different physical machine.Can anybody help me with java code to check whether my server instance is running or when one of the server is not up and running?

Answer 1

To do it quickly and portably, you can check for a page if it's served by the server.

For example you can:

boolean isAlive = true;
try {
  URL hp = new URL("http://yourserver/TestPage.html"); 
  URLConnection hpCon = hp.openConnection(); 
  // add more checks...
} catch (Exception e) {
  isAlive = false;
}

This not much sophisticated method will work with every http server.