lftp hangs on file upload (except very small files)

[wq9578]

lftp always worked fine for me, but for some time now upload fails except for very small files.
Download still works well, including mirroring large directories.
I'm using a current macOS system with lftp installed via homebrew.

Update
It worked with cyberduck
Protocol is FTPes (explicit FTP over TLS)

Here is the log, with a small file working (README, 308 bytes), and a larger file (COPYING, 18092 bytes) failing:

➜  dokuwiki lftp -e "debug; cd doc; put README; bye" server
Verzeichniswechsel OK, cwd=/                                 
---- CWD path to be sent is `/doc'
---> CWD /doc
<--- 250 OK. Current directory is /doc
Verzeichniswechsel OK, cwd=/doc
---> TYPE I
<--- 200 TYPE is now 8-bit binary             
---> PRET STOR README
<--- 200 Ready to proceed                     
---> PASV
<--- 227 Entering Passive Mode (xxx,xxx,xxx,xxx,157,109)
---- Verbinde Daten Socket mit (xxx.xxx.xxx.xxx) Port 40301
---- Datenverbindung hergestellt                       
---> STOR README
<--- 150 Accepted data connection             
Certificate verification: subjectAltName: »ftp.some-server.com« matched
---- Schließe den Daten Socket
<--- 226-17490 Kbytes used (0%) - authorized: 10485760 Kb
<--- 226-File successfully transferred
<--- 226 0.021 seconds (measured here), 14.26 Kbytes per second
---> MFMT 20220903171522 README
<--- 213 UTIME OK                                        
308 Bytes übertragen
---> QUIT
<--- 221-Goodbye. You uploaded 1 and downloaded 0 kbytes.
<--- 221 Logout.
---- Schließe den Kontroll - Socket

➜  dokuwiki lftp -e "debug; cd doc; put COPYING; bye" poly
Verzeichniswechsel OK, cwd=/                                 
---- CWD path to be sent is `/doc'
---> CWD /doc
<--- 250 OK. Current directory is /doc
Verzeichniswechsel OK, cwd=/doc
---> TYPE I
<--- 200 TYPE is now 8-bit binary              
---> PRET STOR COPYING
<--- 200 Ready to proceed                      
---> PASV
<--- 227 Entering Passive Mode (xxx,xxx,xxx,xxx,157,157)
---- Verbinde Daten Socket mit (xxx.xxx.xxx.xxx) Port 40349
---- Datenverbindung hergestellt                        
---> STOR COPYING
<--- 150 Accepted data connection              
Certificate verification: subjectAltName: »ftp.some-server.com« matched
---- Schließe den Daten Socket
»COPYING« bei 18092 (100%) [Warte auf Übertragungsende]                       

Then the upload is stalling, nothing happens anymore.

[lavv17]

It may be a network problem with MTU, for example. tcpdump can be helpful here.

On Thu, 2 Feb 2023 at 04:39, wq9578 ***@***.***> wrote: lftp always worked fine for me, but for some time now upload fails except for very small files. Download still works well, including mirroring large directories. I'm using a current macOS system with lftp installed via homebrew. Here is the log, with a small file working (README, 308 bytes), and a larger file (COPYING, 18092 bytes) failing: ➜ dokuwiki lftp -e "debug; cd doc; put README; bye" server Verzeichniswechsel OK, cwd=/ ---- CWD path to be sent is `/doc' ---> CWD /doc <--- 250 OK. Current directory is /doc Verzeichniswechsel OK, cwd=/doc ---> TYPE I <--- 200 TYPE is now 8-bit binary ---> PRET STOR README <--- 200 Ready to proceed ---> PASV <--- 227 Entering Passive Mode (xxx,xxx,xxx,xxx,157,109) ---- Verbinde Daten Socket mit (xxx.xxx.xxx.xxx) Port 40301 ---- Datenverbindung hergestellt ---> STOR README <--- 150 Accepted data connection Certificate verification: subjectAltName: »ftp.some-server.com« matched ---- Schließe den Daten Socket <--- 226-17490 Kbytes used (0%) - authorized: 10485760 Kb <--- 226-File successfully transferred <--- 226 0.021 seconds (measured here), 14.26 Kbytes per second ---> MFMT 20220903171522 README <--- 213 UTIME OK 308 Bytes übertragen ---> QUIT <--- 221-Goodbye. You uploaded 1 and downloaded 0 kbytes. <--- 221 Logout. ---- Schließe den Kontroll - Socket ➜ dokuwiki lftp -e "debug; cd doc; put COPYING; bye" poly Verzeichniswechsel OK, cwd=/ ---- CWD path to be sent is `/doc' ---> CWD /doc <--- 250 OK. Current directory is /doc Verzeichniswechsel OK, cwd=/doc ---> TYPE I <--- 200 TYPE is now 8-bit binary ---> PRET STOR COPYING <--- 200 Ready to proceed ---> PASV <--- 227 Entering Passive Mode (xxx,xxx,xxx,xxx,157,157) ---- Verbinde Daten Socket mit (xxx.xxx.xxx.xxx) Port 40349 ---- Datenverbindung hergestellt ---> STOR COPYING <--- 150 Accepted data connection Certificate verification: subjectAltName: »ftp.some-server.com« matched ---- Schließe den Daten Socket »COPYING« bei 18092 (100%) [Warte auf Übertragungsende] Then the upload is stalling, nothing happens anymore. — Reply to this email directly, view it on GitHub <#691>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAHLWXCLXL33RXB232GDWN3WVMF5VANCNFSM6AAAAAAUONTVTQ> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

-- Alexander.

[FryDay]

I'm having this same issue on MacOS. Anything over about 10K fails.