Hi,
A couple of months ago I had a problem with Single Attachment Storage after infrastructure migration;
All mailboxes were rsynced to another filesystem, and that may have broken Single Attachment Storage. Many, many (if not all) mailboxes show the below logs on dovecot:
imap(foo@bar.com): Error: read(attachments-connector(zlib(/dovecotdir/mail/ bar.com/foo/mailboxes/INBOX/dbox-Mails/u.26426))) failed: read(/dovecotdir/attach/ bar.com/de/86/de8673894d6fb3f4460e3c26436eefa9a73517fa0f000452f553822367220761502e1d0ce220eee5aa9acf232df0adebf40cce90b57d2e60e1eb9c9ef21671fa-b0d3411772c14957536100009331bd36-43cea6154b3275573b0800009331bd36-26426[base64:19 b/l]) failed: open(/dovecotdir/attach/ bar.com/de/86/de8673894d6fb3f4460e3c26436eefa9a73517fa0f000452f553822367220761502e1d0ce220eee5aa9acf232df0adebf40cce90b57d2e60e1eb9c9ef21671fa-b0d3411772c14957536100009331bd36-43cea6154b3275573b0800009331bd36-26426) failed: No such file or directory
When that happens, the MUA keeps syncing forever.
Now, I need to migrate all mailboxes (again) to another dovecot instance (with no SAS), which works perfectly for new users but when I try to migrate users from my current dovecot server for this new server, I get such errors again, and I can't migrate:
2016-09-29T12:20:50.995934059Z Sep 29 12:20:50 dsync-server(foo@bar.com): Error: dsync(cf7d091311eb): read(attachments-connector(zlib(/dovecotdir/mdbox/bar.com/foo/storage/m.1))) failed: read(/dovecotdir/attach/ bar.com/0c/df/0cdf86b1920938fe3a043f87e2ee9e63dda276bd5b9fba687e4a0c63d181c3b6ebdb96a9517f048c963db71404ad5d14e896e2e67b7abb0c9e107aed5c15ecf1-430ea904dff46757ba1700009331bd36[base64:18 b/l]) failed: open(/dovecotdir/attach/ bar.com/0c/df/0cdf86b1920938fe3a043f87e2ee9e63dda276bd5b9fba687e4a0c63d181c3b6ebdb96a9517f048c963db71404ad5d14e896e2e67b7abb0c9e107aed5c15ecf1-430ea904dff46757ba1700009331bd36) failed: No such file or directory (last sent=mail, last recv=mail_request (EOL))
Is there a way to fix the attachments problem? (I know I can't recover such files, that's Ok) Is there a way to migrate (dsync backup) ignoring such problems?
Thanks in advance.