Hi Deborah, Does the same problem occur if you use sync_client (on the master server, as the cyrus user) to replicate the shared mailbox to the backup server (rather than using XBACKUP over IMAP)? Something like "sync_client -n rsync -m support@xxxxxxxxxxxxxxx" I think? What about if you use "sync_client -n rsync -u support@xxxxxxxxxxxxxxx" instead (i.e. with -u treating the shared mailbox as a USER rather than as a -m MAILBOX)? On the backup server, what does the "ctl_backups verify -vvv -m polyfoam.com.au!support" command say about the shared mailbox? There might be personally-identifying information in this output, I can't remember -- please check/censor carefully before pasting into email. > I'm seeing what looks like a segfault in the backup server logs. Don't > know if this is significant. It's almost certainly significant. Are you able to enable core dumps and get a backtrace from it? That'll probably be the fastest path toward a solution. Let me know if you need help with this :) Cheers, ellie On Wed, Oct 9, 2019, at 1:46 PM, Deborah Pickett wrote: > Hi everyone, > > I'm deploying Cyrus 3.0.8 (Debian buster 3.0.8-6) at $dayjob to replace > an Exchange server. That part is going well, but I'm hitting a hurdle > pulling backups of public folders (shared mailboxes, calendars and > address books, anything outside the user/ hierarchy) using XBACKUP and > backupd. > > Steps to reproduce: > > 1. On master server (mail-3175-1), run imtest and authenticate as admin. > 2. Issue XBACKUP to backup normal user. This succeeds. > 3. Issue XBACKUP to backup public shared mailbox. This produces error > BAD PROTOCOL. > > Expected behaviour is that the backup server backs up this mailbox with > an OK response. > > I'm seeing what looks like a segfault in the backup server logs. Don't > know if this is significant. > > Help? > > Main server (mail-3175-1): Debian buster, cyrus 3.0.8-6 > Backup server (rsync): Debian buster, cyrus 3.0.8-6 > > --- imtest session --- > > mail-3175-1$ /usr/lib/cyrus/bin/imtest -a cyrus > WARNING: no hostname supplied, assuming localhost > > S: * OK [CAPABILITY IMAP4rev1 LITERAL+ ID ENABLE STARTTLS AUTH=PLAIN > SASL-IR] mail-3175-1 Cyrus IMAP 3.0.8-Debian-3.0.8-6 server ready > Please enter your password: > C: A01 AUTHENTICATE PLAIN ***DELETED*** > S: A01 OK [CAPABILITY IMAP4rev1 LITERAL+ ID ENABLE ACL RIGHTS=kxten > QUOTA MAILBOX-REFERRALS NAMESPACE UIDPLUS NO_ATOMIC_RENAME UNSELECT > CHILDREN MULTIAPPEND BINARY CATENATE CONDSTORE ESEARCH SEARCH=FUZZY SORT > SORT=MODSEQ SORT=DISPLAY SORT=UID THREAD=ORDEREDSUBJECT > THREAD=REFERENCES THREAD=REFS ANNOTATEMORE ANNOTATE-EXPERIMENT-1 > METADATA LIST-EXTENDED LIST-STATUS LIST-MYRIGHTS LIST-METADATA WITHIN > QRESYNC SCAN XLIST XMOVE MOVE SPECIAL-USE CREATE-SPECIAL-USE DIGEST=SHA1 > X-REPLICATION URLAUTH URLAUTH=BINARY LOGINDISABLED COMPRESS=DEFLATE > X-QUOTA=STORAGE X-QUOTA=MESSAGE X-QUOTA=X-ANNOTATION-STORAGE > X-QUOTA=X-NUM-FOLDERS IDLE] Success (no protection) > SESSIONID=<cyrus-***DELETED***> > Authenticated. > Security strength factor: 0 > AAA XBACKUP user/debbiep@xxxxxxxxxxxxxxx rsync > * OK USER debbiep@xxxxxxxxxxxxxxx > AAA OK Completed > BBB XBACKUP support@xxxxxxxxxxxxxxx rsync > * NO MAILBOX polyfoam.com.au!support (Bad protocol) > BBB NO Bad protocol > > --- log on master --- > > Oct 9 13:31:37 mail-3175-1 cyrus/imap[189353]: login: localhost [::1] > cyrus PLAIN User logged in > SESSIONID=<cyrus-189353-1570588288-1-17156687401313158221> > Oct 9 13:31:55 mail-3175-1 cyrus/imap[189353]: XBACKUP: connecting to > server 'rsync.polyfoam.com.au' for channel 'rsync' > Oct 9 13:32:01 mail-3175-1 cyrus/imap[189353]: XBACKUP: replicating > user debbiep@xxxxxxxxxxxxxxx > Oct 9 13:32:15 mail-3175-1 cyrus/imap[189353]: XBACKUP: connecting to > server 'rsync.polyfoam.com.au' for channel 'rsync' > Oct 9 13:32:21 mail-3175-1 cyrus/imap[189353]: XBACKUP: replicating > mailbox polyfoam.com.au!support > Oct 9 13:32:21 mail-3175-1 cyrus/imap[189353]: IOERROR: zero length > response to MAILBOXES (end of file reached) > Oct 9 13:32:21 mail-3175-1 cyrus/imap[189353]: IOERROR: zero length > response to RESTART (end of file reached) > Oct 9 13:32:22 mail-3175-1 cyrus/imap[189353]: USAGE cyrus user: > 0.059546 sys: 0.024519 > > --- log on backup server --- > > ***successful backup of user debbiep not shown*** > Oct 9 13:32:15 rsync cyrus/backupd[21340]: telling master 2 > Oct 9 13:32:15 rsync cyrus/backupd[21340]: accepted connection > Oct 9 13:32:15 rsync cyrus/backupd[21340]: telling master 3 > Oct 9 13:32:15 rsync cyrus/master[16697]: service backupd/ipv4 pid > 21340 in READY state: now unavailable and in BUSY state > Oct 9 13:32:15 rsync cyrus/master[16697]: service backupd/ipv4 now has > 0 ready workers > Oct 9 13:32:15 rsync cyrus/master[16697]: service backupd/ipv4 pid > 21340 in BUSY state: now serving connection > Oct 9 13:32:15 rsync cyrus/master[16697]: service backupd/ipv4 now has > 0 ready workers > Oct 9 13:32:21 rsync cyrus/backupd[21340]: login: > mail-3175-1.polyfoam.com.au [10.3.244.125] rsync-mail-3175-1 DIGEST-MD5 > User logged in > Oct 9 13:32:21 rsync cyrus/master[16697]: process type:SERVICE > name:backupd path:/usr/lib/cyrus/bin/backupd age:25.007s pid:21340 > signaled to death by signal 11 (Segmentation fault) > Oct 9 13:32:21 rsync cyrus/master[16697]: service backupd/ipv4 pid > 21340 in BUSY state: terminated abnormally > Oct 9 13:32:21 rsync cyrus/master[16697]: service backupd/ipv4 now has > 0 ready workers > > ---master config--- > > admins: cyrus > allowanonymouslogin: no > allowplaintext: yes > altnamespace: yes > autocreate_inbox_folders: Junk|Trash|Archive|Drafts|Important|Sent > autocreate_post: yes > autocreate_quota: 0 > autocreate_subscribe_folders: Junk|Trash|Archive|Drafts|Sent > calendarprefix: #calendars > configdirectory: /var/lib/cyrus > defaultdomain: ad.polyfoam.com.au > defaultpartition: default > hashimapspool: true > httpmodules: caldav carddav > idlesocket: /run/cyrus/socket/idle > lmtp_downcase_rcpt: yes > lmtpsocket: /run/cyrus/socket/lmtp > loginrealms: ad.polyfoam.com.au polyfoam.com.au flexifoam.com.au > mboxname_lockpath: /run/cyrus/lock > newsspool: /var/spool/news > notifysocket: /run/cyrus/socket/notify > partition-default: /var/spool/cyrus/mail > partition-news: /var/spool/cyrus/news > popminpoll: 1 > proc_path: /run/cyrus/proc > rsync_sync_authname: rsync-mail-3175-1@rsync > rsync_sync_host: rsync.polyfoam.com.au > rsync_sync_password: ***DELETED*** > rsync_sync_port: csync > sasl_auto_transition: no > sasl_auxprop_plugin: sasldb > sasl_mech_list: PLAIN > sasl_pwcheck_method: auxprop saslauthd > sievedir: /var/spool/sieve > sieveusehomedir: false > syslog_prefix: cyrus > tls_client_ca_dir: /etc/ssl/certs > tls_server_cert: /etc/cert/mail-3175-1.polyfoam.com.au.crt > tls_server_key: /etc/cert/mail-3175-1.polyfoam.com.au.key > tls_session_timeout: 1440 > umask: 077 > unixhierarchysep: yes > virtdomains: on > xbackup_enabled: yes > xlist-Archive: Archive > xlist-Drafts: Drafts > xlist-Important: Important > xlist-Junk: Junk > xlist-Sent: Drafts > xlist-Trash: Trash > > ---backup config--- > > admins: rsync-mail-3175-1 > allowanonymouslogin: no > altnamespace: yes > backup_compact_maxsize: 0 > backup_compact_minsize: 0 > backup_compact_work_threshold: 1 > backup_db: twoskip > backuppartition-name: /home/mail-3175-1/cyrus-backup/partitions/default > backup_retention_days: 7 > configdirectory: /var/lib/cyrus > debug: 1 > defaultdomain: rsync > mboxname_lockpath: /run/cyrus/lock > proc_path: /run/cyrus/proc > sasl_auxprop_plugin: sasldb > sasl_mech_list: DIGEST-MD5 > sasl_pwcheck_method: auxprop > syslog_prefix: cyrus > unixhierarchysep: yes > virtdomains: on > > ---- > Cyrus Home Page: 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