I've confirmed it's definitely client side, by redirecting the handin server's address to 127.0.0.1 in /etc/hosts, and listening with `nc -l`. The handin client hangs on "Making secure connection ..." and nc display nothing at all. A few restarts and `nc -l` displays a bunch of gibberish that I'm guessing is the handin protocol, and killing `nc` triggers the handin client to report a connection error.
So it's: - handin client side - maybe related to openssl - nondeterministic - when it occurs, it will recur until you restart DrRacket - when it doesn't occur, it will not recur until you restart DrRacket - affects 8.1 BC - affects 8.1 CS - affects 8.2.0.2 CS - results in the client failing send anything to the network -- William J. Bowman On Sat, Sep 18, 2021 at 08:05:10PM -0700, 'William J. Bowman' via Racket Users wrote: > Since I'm currently experiencing the issue, I've been able to get some better > data. I've managed to reproduce it in 8.2.0.2 CS, which suggests it's not > https://github.com/racket/racket/issues/3804. > > Restarting twice DrRacket hasn't helped, nor has resetting my wifi connection. > > After connecting via a browser, I notice a lot of the following in the log > that seem to correlate with my attempts in the browser: > > [-|2021-09-18T19:37:45] handin: unknown protocol: #"GET / HTTP/1.1" > > ... > > [-|2021-09-18T19:37:53] ERROR: ssl-accept/enable-break: accept failed > > (error:1408F09C:SSL routines:ssl3_get_record:http request) > > As expected, nothing seem to correlate with my attempts to connect from the > handin plugin. > > This makes me suspect the server, but I can't reconcile that with why there's > nothing in the logs. > > -- > William J. Bowman > > On Sat, Sep 18, 2021 at 06:59:43PM -0700, 'William J. Bowman' via Racket > Users wrote: > > I just tried this, but I can't seem to connect. > > http://cs110.students.cs.ubc.ca:7979/ > > gives "connection reset", and > > https://cs110.students.cs.ubc.ca:7979/ > > gives "secure connection failed". > > > > There's no prompt to accept the certificate (which I wouldn't expect, > > because we're using a CA signed certificate through Let's Encrypt, not a > > self-signed certificate). > > > > I'm currently experiencing the problem on my own client. I'm not sure if > > that's related; I also couldn't connect from my phone. > > > > -- > > William J. Bowman > > > > On Sat, Sep 18, 2021 at 09:24:05PM -0400, Sam Tobin-Hochstadt wrote: > > > Have you tried visiting the server with a browser? That should work, > > > although you'll have to accept the certificate. It might also indicate > > > some > > > aspect of the behavior. > > > > > > Sam > > > > > > On Sat, Sep 18, 2021, 7:13 PM 'William J. Bowman' via Racket Users < > > > [email protected]> wrote: > > > > > > > I need some help debugging an issue with the handin package. The handin > > > > plugin (client) displays “Making secure connection to <handin server> > > > > …”, > > > > and simply hangs. Closing the dialog and trying again never resolves the > > > > issue. > > > > > > > > The only method that seems to resolve the issue, although > > > > inconsistently, > > > > is restarting DrRacket, opening a new file, and trying to submit that > > > > new > > > > file. This sometimes, but not always, enables the client to connect. > > > > Once > > > > it does connect, the issue doesn't seem to recur for some time. The > > > > client > > > > can make multiple successful submissions, at least until the end of > > > > lecture > > > > (maybe related to the next time they disconnect/reconnect to the > > > > internet). > > > > > > > > We running Racket 7.8 on the server and 8.1 BC on the clients. We've > > > > seen > > > > the issue occur on many operating system---old and new versions of > > > > macOS, > > > > Windows 10, and at one report on Linux. > > > > > > > > I can't just upgrade the clients to 8.2, since there's a bug in 8.2 that > > > > affects rendering inexact numbers in BSL, so I really want some > > > > confidence > > > > about what the issue is before I start upgrading versions. > > > > > > > > Anecdotally, the problem seems more common this semester compared to the > > > > previous semester, and we upgraded the clients to 8.1 this semester, > > > > suggesting the clients are at fault. > > > > > > > > When this problem occurs, there is nothing in the log on the handin > > > > server, suggesting the client did not even manage to initiate the > > > > connection to the server. In particular, the server never seems to make > > > > it > > > > to this log line: > > > > > > > > https://github.com/racket/handin/blob/ac08937cc6b1eca8abe3d4d4df59876f95cbea17/handin-server/main.rkt#L679 > > > > This is one the earliest log lines and before pretty much anything > > > > happens, so we're *PRETTY SURE* the client is blocking. > > > > > > > > Right now, my best guess is that we might be affected by this bug, which > > > > causes SSL ports to block incorrectly: > > > > https://github.com/racket/racket/issues/3804 > > > > > > > > If so, it would probably be in the client, unless `(ssl-addresses r)` > > > > can > > > > block in the same way on the server, since otherwise the above log line > > > > would execute. > > > > > > > > However, if it is the client, I don't have any explanation about why > > > > restarting DrRacket would workaround the bug, or why it sometimes > > > > doesn't > > > > work. > > > > > > > > I'd appreciate any help. > > > > > > > > -- > > > > William J. Bowman > > > > > > > > -- > > > > You received this message because you are subscribed to the Google > > > > Groups > > > > "Racket Users" group. > > > > To unsubscribe from this group and stop receiving emails from it, send > > > > an > > > > email to [email protected]. > > > > To view this discussion on the web visit > > > > https://groups.google.com/d/msgid/racket-users/YUZyWlsY9CdCDyPu%40williamjbowman.com > > > > . > > > > > > > > -- > > You received this message because you are subscribed to the Google Groups > > "Racket Users" group. > > To unsubscribe from this group and stop receiving emails from it, send an > > email to [email protected]. > > To view this discussion on the web visit > > https://groups.google.com/d/msgid/racket-users/YUaZj9v0Lch0jfMC%40williamjbowman.com. > > -- > You received this message because you are subscribed to the Google Groups > "Racket Users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/racket-users/YUao5ov6j7JCJHLW%40williamjbowman.com. -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/racket-users/YUauWYAeXzzk9lU/%40williamjbowman.com.
