private void connect(InetSocketAddress addr) throws IOException {
try {
client = new ProtoBlockingRpcClient(ClientProtocol.class, addr);
service = client.getStub();
} catch (Exception e) {
throw new IOException(e);
}
LOG.info("connected to tajo cluster (" + tajo.util.NetUtils.getIpPortString(addr) + ")");
}
public boolean isConnected() {
return client.isConnected();
}
public void close() {
client.close();
}