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Java method isReachable is not working %100 of the time

bbcac asked
Last Modified: 2008-04-14
I have a method that checks if a computer is online. IT works most of the time but sometimes it falsely says that computers are in connected.

I need to add to it so that it is more thourough. It is also important to note that it is always the same systesm that reported incorrectly. I suspect, based on the java docs, the the isReachable() method is failing due to a firewall or something.
Here is the method:

InetAddress host = InetAddress.getByName(computer);
if (!(host.isReachable(timeoutping))){
notdone = false;
Error = "Communication Error";
}catch (Exception e){notdone=false; Error= "Host not found by Name";}
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