Handling Camel sftp endpoint authentication failure

Question

Is there any sane way to handle authentication failure at an sftp endpoint?

I have a camel route with sftp endpoint, specifically it moves files to sftp. When the sftp location is not available, i want to:

If its an authentication failure, log, and do not retry. Move original files to failure folder.
If the host is unknow, log and dont retry. Move original files to failure folder.
Otherwise: retry a few times before failure.

Unfortunately SftpOperations always keeps on retrying. In the case of authentication failure (which can easily happen if the person deploying the app makes a typo in the properties file) this means repeated attempts with the wrong credentials. If it's just the password that is wrong, it may lead to the user being blocked.

Look at [throwExceptionOnConnectFailed](http://camel.apache.org/ftp2.html) — Bedla, Dec 22 '17 at 22:20

score 0 · Answer 1 · answered Dec 28 '17 at 13:53

In my specific case i decided i wasn't going to retry at all in case of an error at the sftp endpoint. This is achieved by adding the following to the route configuration:

   &maximumReconnectAttempts=0&throwExceptionOnConnectFailed=true&consumer.bridgeErrorHandler=true

The route now fails after the first attempt. In a more general case if you want to handle different exceptions (see this question) you can use onException like this:

        from(route.getDownloadFromUri())
            .routeId(route.getRouteId())
            .routePolicy(getRoutePolicy())
            .onException(JSchException.class)
                .maximumRedeliveries(2)
                .handled(true)
                .log(LoggingLevel.ERROR, LOG, "!!!! Caught JSchException")
                .to(SEND_EMAIL_ROUTE)
                .end()
            .onException(Throwable.class)
                .maximumRedeliveries(5)
                .handled(true)
                .log(LoggingLevel.ERROR, LOG, "Error moving file ${file:name}: ${exception}")
                .to(SEND_EMAIL_ROUTE)
                .end()
            .onException(IgnoreException.class) // Do nothing, just end processing so routePolicy onEchangeDone is executed
                .handled(true)
                .end()

Handling Camel sftp endpoint authentication failure

1 Answers1