UnexpectedValueException: Expected NET_SFTP_NAME or NET_SFTP_STATUS. Got packet type::

[shuvam07]

I am trying to list contents from a server directory using an SFTP connection, and sometimes it just throws this error

UnexpectedValueException: Expected NET_SFTP_NAME or NET_SFTP_STATUS. Got packet type::

This issues is happening intermittently. I have attached the screenshot of the timeframe when its happening. I am using this connection for a long time now (almost 5 months), but this issues has started up showing recently. I am using phpseclib version 3.0.19

[terrafrost]

I apologize for the delay - I've been vacationing in Canada and Washington for the past ten days and am flying back today.

Anyway, can you post the logs? You can get them by doing define('NET_SFTP_LOGGING', 2); at the top and then echo $sftp->getSFTPLog() after the error is encountered.

Thanks!

[michaellehmkuhl]

@terrafrost I'm attaching a log from one of these instances. Hope this helps to solve the issue. It's causing quite a bit of random disruption in production for our application.
sftp-unexpectedvalueexception-phpseclib-issue-1945.log

[terrafrost]

@michaellehmkuhl - so it looks like, if anything, you're getting a UnexpectedValueException: Expected NET_SFTP_DATA or NET_SFTP_STATUS. Got packet type:: error. ie. NET_SFTP_DATA instead of NET_SFTP_STATUS.

It would be interesting to see your SSH logs as well. Like what is your SSH server and are you getting any errors at the SSH layer after phpseclib sends that last NET_SFTP_READ request? In lieu of knowing that I do wonder if define('NET_SFTP_QUEUE_SIZE', 1); might help, for your situation.

[michaellehmkuhl]

Thanks for the tip, @terrafrost! We'll give that a try.

[AlikDex]

Hi, guys. I want to share my experience. Maybe it help you.

I also often had the same error. I ran a disk check. It turned out that there are a lot of bad sectors. And because of that the file writing was interrupted. With the same error.

After contacting customer service, the disk was replaced. The error also disappeared.