From InetAddress.java:

            } finally {
                // Cache the address.
                cacheAddress(host, obj, success);
                // Delete the host from the lookupTable, and
                // notify all threads waiting for the monitor
                // for lookupTable.
                updateLookupTable(host);
            }

If cacheAddress() throws an exception, such as OutOfMemoryError,
then updateLookupTable() will not get called. This will
cause future lookups of this host to wait forever in
checkLookupTable().

###@###.### 2005-05-27 00:30:53 GMT

A test case follows:

----
import java.net.InetAddress;
import java.net.UnknownHostException;

public class test2 {
    public static void main(String args[]) {
        System.setProperty("sun.simulate.outofmemory", "true");
        try {
            InetAddress.getByName("localhost");
        } catch (Exception e) {
        }
        System.setProperty("sun.simulate.outofmemory", "false");
        try {
            InetAddress.getByName("localhost");
        } catch (Exception e) {
        }
    }
}
----

Because the out-of-memory error needs to happen in a very specific
place, the easiest way to reproduce the problem is either to
modify cacheAddress() in InetAddress.java to do something like:

if (System.getProperty("sun.simulate.outofmemory").equals("true")) {
    throw new RuntimeException("Out of memory");
}

or run inside a debugger and force an out-of-memory error at
the correct time.

###@###.### 2005-06-16 07:01:27 GMT