MemcachedConnection constructor should catch SocketException

Running version 2.0.1 on OS X 10.5.7 with JDK 1.5, I observed the following 
exception when to a 
host that had been accidentally taken out of service:

java.net.SocketException: Host is down
    at sun.nio.ch.Net.connect(Native Method)
    at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:464)
    at net.spy.memcached.MemcachedConnection.<init>(MemcachedConnection.java:80)
    at 
net.spy.memcached.DefaultConnectionFactory.createConnection(DefaultConnectionFac
tory.java:8
4)
    at net.spy.memcached.MemcachedClient.<init>(MemcachedClient.java:146)

It looks like the 2.4.1 client resolves this by catching ConnectException and 
queuing a reconnect, 
in this code:

// Initially I had attempted to skirt this by queueing every
// connect, but it considerably slowed down start time.
try {
    if(ch.connect(sa)) {
        getLogger().info("Connected to %s immediately", qa);
        connected(qa);
    } else {
        getLogger().info("Added %s to connect queue", qa);
        ops=SelectionKey.OP_CONNECT;
    }
    qa.setSk(ch.register(selector, ops, qa));
    assert ch.isConnected()
        || qa.getSk().interestOps() == SelectionKey.OP_CONNECT
        : "Not connected, and not wanting to connect";
} catch(ConnectException e) {
    queueReconnect(qa);
}
connections.add(qa);

Given the stack trace I observed, the catch of ConnectException should cast a 
slightly larger net 
and catch SocketException.

Original issue reported on code.google.com by kevin.la...@gmail.com on 18 Oct 2009 at 9:01

roc230 / spymemcached

MemcachedConnection constructor should catch SocketException #94