Hi, attached a strace file of the lftp call when run with version 2.27-3ubuntu1.3:
# strace -f -o /tmp/lftp.strace lftp -c "source /scratch/duplicity-temp /duplicity-RHpHVx-tempdir/mkstemp-jC4mJb-1; ( cd some-stage.example.org/ && ls ) || ( mkdir -p some-stage.example.org/ && cd some- stage.example.org/ && ls )" dmesg shows: [42084.466069] traps: lftp[8067] general protection ip:55792fb3a4b0 sp:7ffd77402a08 error:0 in lftp[55792fa2a000+14e000] ** Attachment added: "lftp.strace" https://bugs.launchpad.net/ubuntu/+source/glibc/+bug/1902832/+attachment/5431159/+files/lftp.strace -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to duplicity in Ubuntu. https://bugs.launchpad.net/bugs/1902832 Title: lftp support broken - exits with error_code -11 on Bionic Status in duplicity package in Ubuntu: Confirmed Status in glibc package in Ubuntu: Confirmed Status in duplicity source package in Bionic: Confirmed Status in glibc source package in Bionic: Confirmed Bug description: We are using duplicity 0.7.17 and Ubuntu 18.04 LTS. After upgrading these packages in Ubuntu: Upgrade: libc-bin:amd64 (2.27-3ubuntu1.2, 2.27-3ubuntu1.3) Upgrade: locales:amd64 (2.27-3ubuntu1.2, 2.27-3ubuntu1.3) Upgrade: multiarch-support:amd64 (2.27-3ubuntu1.2, 2.27-3ubuntu1.3) Upgrade: libc6-dev:amd64 (2.27-3ubuntu1.2, 2.27-3ubuntu1.3), Upgrade: libc6:amd64 (2.27-3ubuntu1.2, 2.27-3ubuntu1.3) Upgrade: libc-dev-bin:amd64 (2.27-3ubuntu1.2, 2.27-3ubuntu1.3) the duplicity/lftp support stopped working. It worked for years just fine before that. Basic error message is: Giving up after 5 attempts. BackendException: Error running 'lftp -c "source /tmp/duplicity-gVCsqa-tempdir/mkstemp-serY3Q-1; ( cd etc_backup/ && ls ) || ( mkdir -p etc_backup/ && cd etc_backup/ && ls )"': returned -11, with output: Error/debug output: Using archive dir: /root/.duplicity/etc_daily Using backup name: etc_daily GPG binary is gpg, version 2.2.4 Import of duplicity.backends.acdclibackend Succeeded Import of duplicity.backends.azurebackend Succeeded Import of duplicity.backends.b2backend Succeeded Import of duplicity.backends.botobackend Succeeded Import of duplicity.backends.cfbackend Succeeded Import of duplicity.backends.dpbxbackend Failed: No module named dropbox Import of duplicity.backends.gdocsbackend Succeeded Import of duplicity.backends.giobackend Succeeded Import of duplicity.backends.hsibackend Succeeded Import of duplicity.backends.hubicbackend Succeeded Import of duplicity.backends.imapbackend Succeeded Import of duplicity.backends.lftpbackend Succeeded Import of duplicity.backends.localbackend Succeeded Import of duplicity.backends.mediafirebackend Succeeded Import of duplicity.backends.megabackend Succeeded Import of duplicity.backends.multibackend Succeeded Import of duplicity.backends.ncftpbackend Succeeded Import of duplicity.backends.onedrivebackend Succeeded Import of duplicity.backends.par2backend Succeeded Import of duplicity.backends.pydrivebackend Succeeded Import of duplicity.backends.rsyncbackend Succeeded Import of duplicity.backends.ssh_paramiko_backend Succeeded Import of duplicity.backends.ssh_pexpect_backend Succeeded Import of duplicity.backends.swiftbackend Succeeded Import of duplicity.backends.sxbackend Succeeded Import of duplicity.backends.tahoebackend Succeeded Import of duplicity.backends.webdavbackend Succeeded LFTP version is 4.8.1 Using temporary directory /tmp/duplicity-_Mgype-tempdir Registering (mkstemp) temporary file /tmp/duplicity-_Mgype-tempdir/mkstemp-55iPLR-1 SETTINGS: set ssl:verify-certificate true set ftp:ssl-allow false set http:use-propfind true set net:timeout 30 set net:max-retries 5 set ftp:passive-mode on debug open -u '<username_removed>,<password_removed>' ftp://hostname.your-storagebox.de Main action: remove-all-but-n-full Acquiring lockfile /root/.duplicity/etc_daily/lockfile ================================================================================ duplicity 0.7.17 (February 26, 2018) Args: /usr/bin/duplicity remove-all-but-n-full 7 -v9 --archive-dir=/root/.duplicity --force --name etc_daily --no-encryption ftp://<username_removed>@<hostname_removed>.your-storagebox.de/etc_full Linux <hostname_removed> 4.15.0-122-generic #124-Ubuntu SMP Thu Oct 15 13:03:05 UTC 2020 x86_64 x86_64 /usr/bin/python2 2.7.17 (default, Sep 30 2020, 13:38:04) [GCC 7.5.0] ================================================================================ CMD: lftp -c "source /tmp/duplicity-_Mgype-tempdir/mkstemp-55iPLR-1; ( cd etc_full/ && ls ) || ( mkdir -p etc_full/ && cd etc_full/ && ls )" Reading results of 'lftp -c "source /tmp/duplicity-_Mgype-tempdir/mkstemp-55iPLR-1; ( cd etc_full/ && ls ) || ( mkdir -p etc_full/ && cd etc_full/ && ls )"' Backtrace of previous error: Traceback (innermost last): File "/usr/lib/python2.7/dist-packages/duplicity/backend.py", line 369, in inner_retry return fn(self, *args) File "/usr/lib/python2.7/dist-packages/duplicity/backend.py", line 578, in list return [tobytes(x) for x in self.backend._list()] File "/usr/lib/python2.7/dist-packages/duplicity/backends/lftpbackend.py", line 181, in _list _, l, e = self.subprocess_popen(commandline) File "/usr/lib/python2.7/dist-packages/duplicity/backend.py", line 499, in subprocess_popen (logstr, result, stdout + ' ' + stderr)) BackendException: Error running 'lftp -c "source /tmp/duplicity-_Mgype-tempdir/mkstemp-55iPLR-1; ( cd etc_full/ && ls ) || ( mkdir -p etc_full/ && cd etc_full/ && ls )"': returned -11, with output: -rw-r--r-- 1 u234538-sub2 u234538 885032 Oct 28 00:00 duplicity-full-signatures.20201028T000001Z.sigtar.gpg -rw-r--r-- 1 u234538-sub2 u234538 885113 Oct 29 00:00 duplicity-full-signatures.20201029T000001Z.sigtar.gpg -rw-r--r-- 1 u234538-sub2 u234538 886172 Oct 30 00:00 duplicity-full-signatures.20201030T000001Z.sigtar.gpg -rw-r--r-- 1 u234538-sub2 u234538 886175 Oct 31 00:00 duplicity-full-signatures.20201031T000002Z.sigtar.gpg -rw-r--r-- 1 u234538-sub2 u234538 886163 Nov 1 00:00 duplicity-full-signatures.20201101T000001Z.sigtar.gpg -rw-r--r-- 1 u234538-sub2 u234538 886173 Nov 2 00:00 duplicity-full-signatures.20201102T000001Z.sigtar.gpg -rw-r--r-- 1 u234538-sub2 u234538 886625 Nov 3 00:00 duplicity-full-signatures.20201103T000002Z.sigtar.gpg -rw-r--r-- 1 u234538-sub2 u234538 481 Oct 28 00:00 duplicity-full.20201028T000001Z.manifest.gpg -rw-r--r-- 1 u234538-sub2 u234538 64187446 Oct 28 00:00 duplicity-full.20201028T000001Z.vol1.difftar.gpg -rw-r--r-- 1 u234538-sub2 u234538 480 Oct 29 00:00 duplicity-full.20201029T000001Z.manifest.gpg -rw-r--r-- 1 u234538-sub2 u234538 64189301 Oct 29 00:00 duplicity-full.20201029T000001Z.vol1.difftar.gpg -rw-r--r-- 1 u234538-sub2 u234538 480 Oct 30 00:00 duplicity-full.20201030T000001Z.manifest.gpg -rw-r--r-- 1 u234538-sub2 u234538 64198883 Oct 30 00:00 duplicity-full.20201030T000001Z.vol1.difftar.gpg -rw-r--r-- 1 u234538-sub2 u234538 479 Oct 31 00:00 duplicity-full.20201031T000002Z.manifest.gpg -rw-r--r-- 1 u234538-sub2 u234538 64198893 Oct 31 00:00 duplicity-full.20201031T000002Z.vol1.difftar.gpg -rw-r--r-- 1 u234538-sub2 u234538 482 Nov 1 00:00 duplicity-full.20201101T000001Z.manifest.gpg -rw-r--r-- 1 u234538-sub2 u234538 64198890 Nov 1 00:00 duplicity-full.20201101T000001Z.vol1.difftar.gpg -rw-r--r-- 1 u234538-sub2 u234538 479 Nov 2 00:00 duplicity-full.20201102T000001Z.manifest.gpg -rw-r--r-- 1 u234538-sub2 u234538 64198894 Nov 2 00:00 duplicity-full.20201102T000001Z.vol1.difftar.gpg -rw-r--r-- 1 u234538-sub2 u234538 481 Nov 3 00:00 duplicity-full.20201103T000002Z.manifest.gpg -rw-r--r-- 1 u234538-sub2 u234538 64203538 Nov 3 00:00 duplicity-full.20201103T000002Z.vol1.difftar.gpg ---- Resolving host address... ---- 2 addresses found: 202:4f8:b23:3000::16, 146.202.112.16 ---- Connecting to <hostname_removed> (202:4f8:b23:3000::16) port 21 <--- 220 ProFTPD Server (Backup) [202:4f8:b23:3000::16] ---> FEAT <--- 211-Features: <--- AUTH TLS <--- CCC <--- CLNT <--- EPRT <--- EPSV <--- HOST <--- LANG ko-KR.UTF-8;ko-KR;es-ES.UTF-8;es-ES;bg-BG.UTF-8;bg-BG;it-IT.UTF-8;it-IT;zh-CN.UTF-8;zh-CN;ja-JP.UTF-8;ja-JP;zh-TW.UTF-8;zh-TW;ru-RU.UTF-8;ru-RU;fr-FR.UTF-8;fr-FR;en-US.UTF-8;en-US* <--- MDTM <--- MFF modify;UNIX.group;UNIX.mode; <--- MFMT <--- MLST modify*;perm*;size*;type*;unique*;UNIX.group*;UNIX.groupname*;UNIX.mode*;UNIX.owner*;UNIX.ownername*; <--- PBSZ <--- PROT <--- REST STREAM <--- SIZE <--- SSCN <--- TVFS <--- UTF8 <--- 211 End ---> CLNT lftp/4.8.1 <--- 200 OK ---> LANG <--- 200 Using default language en_US ---> OPTS UTF8 ON <--- 200 UTF8 set to on ---> HOST <hostname_removed> <--- 504 <hostname_removed>: Unknown hostname provided ---> OPTS MLST modify;perm;size;type;UNIX.group;UNIX.mode;UNIX.owner <--- 200 MLST OPTS modify;perm;size;type;UNIX.group;UNIX.mode; ---> USER <username_removed> <--- 331 Password required for <username_removed> ---> PASS <password_removed> <--- 230 User <username_removed> logged in ---> PWD <--- 257 "/" is the current directory ---- CWD path to be sent is `/etc_full' ---> CWD /etc_full <--- 250 CWD command successful ---> EPSV <--- 229 Entering Extended Passive Mode (|||54612|) ---- Connecting data socket to (202:4f8:b23:3000::16) port 54612 ---- Data connection established ---> LIST <--- 150 Opening ASCII mode data connection for file list ---- Got EOF on data connection ---- Closing data socket <--- 226 Transfer complete ---> QUIT <--- 221 Goodbye. ---- Closing control socket Attempt 1 failed. BackendException: Error running 'lftp -c "source /tmp/duplicity-_Mgype-tempdir/mkstemp-55iPLR-1; ( cd etc_full/ && ls ) || ( mkdir -p etc_full/ && cd etc_full/ && ls )"': returned -11, with output: -rw-r--r-- 1 u234538-sub2 u234538 885032 Oct 28 00:00 duplicity-full-signatures.20201028T000001Z.sigtar.gpg -rw-r--r-- 1 u234538-sub2 u234538 885113 Oct 29 00:00 duplicity-full-signatures.20201029T000001Z.sigtar.gpg -rw-r--r-- 1 u234538-sub2 u234538 886172 Oct 30 00:00 duplicity-full-signatures.20201030T000001Z.sigtar.gpg -rw-r--r-- 1 u234538-sub2 u234538 886175 Oct 31 00:00 duplicity-full-signatures.20201031T000002Z.sigtar.gpg -rw-r--r-- 1 u234538-sub2 u234538 886163 Nov 1 00:00 duplicity-full-signatures.20201101T000001Z.sigtar.gpg -rw-r--r-- 1 u234538-sub2 u234538 886173 Nov 2 00:00 duplicity-full-signatures.20201102T000001Z.sigtar.gpg -rw-r--r-- 1 u234538-sub2 u234538 886625 Nov 3 00:00 duplicity-full-signatures.20201103T000002Z.sigtar.gpg -rw-r--r-- 1 u234538-sub2 u234538 481 Oct 28 00:00 duplicity-full.20201028T000001Z.manifest.gpg -rw-r--r-- 1 u234538-sub2 u234538 64187446 Oct 28 00:00 duplicity-full.20201028T000001Z.vol1.difftar.gpg -rw-r--r-- 1 u234538-sub2 u234538 480 Oct 29 00:00 duplicity-full.20201029T000001Z.manifest.gpg -rw-r--r-- 1 u234538-sub2 u234538 64189301 Oct 29 00:00 duplicity-full.20201029T000001Z.vol1.difftar.gpg -rw-r--r-- 1 u234538-sub2 u234538 480 Oct 30 00:00 duplicity-full.20201030T000001Z.manifest.gpg -rw-r--r-- 1 u234538-sub2 u234538 64198883 Oct 30 00:00 duplicity-full.20201030T000001Z.vol1.difftar.gpg -rw-r--r-- 1 u234538-sub2 u234538 479 Oct 31 00:00 duplicity-full.20201031T000002Z.manifest.gpg -rw-r--r-- 1 u234538-sub2 u234538 64198893 Oct 31 00:00 duplicity-full.20201031T000002Z.vol1.difftar.gpg -rw-r--r-- 1 u234538-sub2 u234538 482 Nov 1 00:00 duplicity-full.20201101T000001Z.manifest.gpg -rw-r--r-- 1 u234538-sub2 u234538 64198890 Nov 1 00:00 duplicity-full.20201101T000001Z.vol1.difftar.gpg -rw-r--r-- 1 u234538-sub2 u234538 479 Nov 2 00:00 duplicity-full.20201102T000001Z.manifest.gpg -rw-r--r-- 1 u234538-sub2 u234538 64198894 Nov 2 00:00 duplicity-full.20201102T000001Z.vol1.difftar.gpg -rw-r--r-- 1 u234538-sub2 u234538 481 Nov 3 00:00 duplicity-full.20201103T000002Z.manifest.gpg -rw-r--r-- 1 u234538-sub2 u234538 64203538 Nov 3 00:00 duplicity-full.20201103T000002Z.vol1.difftar.gpg Using Duplicity 0.7.17 Python 2.7.17 Ubuntu 18.04 LTS. 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