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SocketException: Too many open files

Andres Delrotti
Ranch Hand

Joined: Aug 11, 2005
Posts: 164
Javaranch....I have another problem....

I have a running thread which connect to a socket port of a certain URL and reads incoming messages from the connected host port. The code basically goes like this:

This is done inside the run method of the thread

while (true) {
try {
Socket socket = new Socket(hostname, Integer.parseInt(port));
InputStreamReader input = new InputStreamReader
BufferedReader in = new BufferedReader(input);
while (connected) {
if (in.ready()){
int charMsg = in.read();
// do processes
catch (SocketException ex) {

If ever the host is down....it catches the SocketException prints the exception and goes back to the nex iteration of the while true loop...until the host becomes available again.

Whenever the host becomes unavailble and I check the stack trace... I always get the Exception: SocketException (too many open files). What could be the cause of this? Can anyone enlighten me on this?
Joe Ess

Joined: Oct 29, 2001
Posts: 9189

This article may help you out

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subject: SocketException: Too many open files
jQuery in Action, 3rd edition