My work around for the twisted/conch bug if anyone is interested. FileTransferHandler was not handling closed connections properly. Btw, this is with release version 20.3.0, which seems to be the latest version. However, if I look in the Twisted repo it looks like someone is trying to address this bug for the next release.
https://github.com/radifalco/conch_issues/commit/c25aa6bca20201f51d59c3a6dca4c1fb2aed2242?branch=c25aa6bca20201f51d59c3a6dca4c1fb2aed2242&diff=split On Fri, Sep 25, 2020 at 7:42 AM Robert DiFalco <robert.difa...@gmail.com> wrote: > I agree it's a bug in conch and I believe my repo shows a reproducible > example. Run the test, it never completes because the deferred from > `makeDirectory` never fires. . > > On Fri, Sep 25, 2020 at 3:41 AM Jean-Paul Calderone < > exar...@twistedmatrix.com> wrote: > >> On Thu, Sep 24, 2020 at 8:54 PM Robert DiFalco <robert.difa...@gmail.com> >> wrote: >> >>> Why exactly is makeDirectory not firing any callbacks or errbacks and >>> what can I add at the Factory level to make it do so? >>> >> >> class MySSHClientFactory(SSHClientFactory): >>> def clientConnectionLost(self, connector, reason): >>> self.op.addErrback(reason) >>> >>> def makeDirectory(self, path, attrs): >>> self.op = Deferred() >>> def _cbSuccess(result): >>> self.op.callback(result) >>> >>> return self.sftpClient.makeDirectory(path, >>> attrs).addCallback(_cbSuccess)d >>> >>> >> This code is wrong. It takes what *may* be a perfectly good Deferred >> from makeDirectory and breaks the error chain off of it. The correct way >> to do this would be more like `makeDirectory(...).chainDeferred(self.op)`. >> However, `self.op` and `_cbSuccess` are doing nothing useful here so you >> may as well just delete all that and return the `makeDirectory(...)` >> Deferred. >> >> If *that* Deferred doesn't fire its errback chain when the connection is >> closed, that's a bug in Conch. If you can put together a minimal example >> and file a ticket, that would be wonderful and perhaps someone can get it >> fixed for you. >> >> Jean-Paul >> _______________________________________________ >> Twisted-Python mailing list >> Twisted-Python@twistedmatrix.com >> https://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python >> >
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