Here is the simplified version of
org.apache.camel.component.file.remote.RemoteFileProducer.preWriteCheck

@Override
public void preWriteCheck(Exchange exchange) {
    boolean noop = false;
    if (loggedIn) {
        try {
            noop = getOperations().sendNoop();
        } catch (Exception e) {
            noop = false;
        }
    }

    if (!noop) {
        connectIfNecessary(exchange);
    }
} 

The problem is, that the method connectIfNecessary checks the connection once again:

protected void connectIfNecessary(Exchange exchange) {
    if (!loggedIn || !getOperations().isConnected()) {
        RemoteFileConfiguration config = getEndpoint().getConfiguration();
        loggedIn = getOperations().connect(config, exchange);
    }
} 

It is wrong! If Noop returns false, the connection recreation must be forced. The second check getOperations().isConnected() is much less strong and must be omitted.

I cause the system to remain the broken connection and reuse it again and again. It makes Retry-Configuration useless.

P.S. The class RemoteFileConsumer behaves correctly. It forces the connect, if Noop was not successful.