}
if (ret < 0) {
// scheduleRemove(session);
IoFilterChain filterChain = session.getFilterChain();
filterChain.fireInputClosed();
}
} catch (Exception e) {
if (e instanceof IOException) {
if (!(e instanceof PortUnreachableException)
|| !AbstractDatagramSessionConfig.class.isAssignableFrom(config.getClass())