Close channel before trying to open again Exception is raised upon folder creation #1961
Comments
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I can get a similar error if I try to do certain operations more than once. eg. $sftp->openShell();
$sftp->openShell();I mean, I should prob update it to work more like the DocBlock comments describe: * Creates an interactive shell
*
* Returns bool(true) if the shell was opened.
* Returns bool(false) if the shell was already open.Anyway, it almost feels like what's going is that the connection is getting interrupted and then phpseclib is trying to reconnect. I think 8ecd156 should do the trick for you. Thanks! |
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Thanks @terrafrost. Will upgrade and report back if the error happens again! |
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@terrafrost, the issue still persists :-/. Any other ideas? |
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So I was able to test my theory and had to make one more tweak for it to work: That said, if my theory were true you'd also need to do $ssh = new SFTP('localhost', 22);
$ssh->login('user', 'pass');
echo $ssh->pwd() . "\n";
sleep(2);
//$ssh->ping();
echo $ssh->pwd();And let's also say your sshd_config file had this in it: At that point the SSH server would disconnect between the two But is that what's actually going on in your case? idk. Outside of your stack trace I have very little information that I can work with. In order to say more definitely I'm going to need to have the SSH logs. You can get them by doing |
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I just resolved a problem with a SFTP server using The problem was that I got a After some debugging I found out that aforementioned server disconnected after executing So I came up with this workaround: Storage::extend('sftp', function (Application $app, array $config) {
$config['connectivityChecker'] = new class extends SimpleConnectivityChecker {
public function isConnected(SFTP $connection): bool
{
if (parent::isConnected($connection)) {
$connection->ping();
return true;
}
return false;
}
};
return Storage::createSftpDriver($config);
});Hopefully this will help anyone. |
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@sandcore-dev I implemented your suggestion. EDIT: Forget what I just wrote... you have to use extend, otherwise the config is not cacheable. You could still modify your code to use Storage::extend('sftp', function (Application $app, array $config) {
$config['connectivityChecker'] = new SimpleConnectivityChecker(true);
return Storage::createSftpDriver($config);
});However, this didn't solve my issue. Here is my stack trace of the exception starting with the The additional Might be a dumb question, but can a SFTP connection handle two simultaneous write requests? It's already dawning on me that if I have two processes run in the queue trying to write simultaneously to the same sftp connection, this might cause the reported error. Can someone confirm this please? |
I am using the
flysystem-sftp-v3in a Laravel app which uploads files to a SFTP server around 500times a month. Occasionally I get the errorPlease close the channel (256) before trying to open it againfromSSH2::openChannel()when trying to runStorage::disk(’sftp’)->makeDirectory(‘folder_name’).I tried to check the code to understand what the error means and how to avoid it, but I wasn’t able to figure it out myself. Can someone explain to me or point me in the right direction on when this happens and why?
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