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Richard Platel

2013-Jan-14 19:12 UTC

[Dovecot] Zlib maildir reindex bug?

Hi

Running dovecot 2.1.7 (from debian repo).

We have some old compressed maildir messages with the wrong S= size in the
filename (our fault).

If I delete index files, log in to the mailbox and try to FETCH the bad message,
dovecot complains about the incorrect message size, attempts to fix the filename
and disconnects the client.  However, it changes the filesize to the size of the
message on disk, not the message's uncompressed size.

For subsequent clients, the FETCH works, but dovecot logs an error (and maybe
re-indexes the mailbox?) and the message UID changes.


Jan 14 18:40:56 imap01 dovecot: imap(bub at confidence.com): Error: Cached
message size larger than expected (1612 > 1556)
Jan 14 18:40:56 imap01 dovecot: imap(bub at confidence.com): Error: Maildir
filename has wrong S value, renamed the file from /mail/mailstore01/505/236/bub
at confidence.com/.Sent
Items/cur/1168058702.93517743273399070372.fetchmail01,S=1612:2,Sab to
/mail/mailstore01/505/236/bub at confidence.com/.Sent
Items/cur/1168058702.93517743273399070372.fetchmail01,S=931:2,Sab
Jan 14 18:40:56 imap01 dovecot: imap(bub at confidence.com): Error: Corrupted
index cache file /mail/index01/505/236/bub at confidence.com/.Sent
Items/dovecot.index.cache: Broken physical size for mail UID 1
Jan 14 18:40:56 imap01 dovecot: imap(bub at confidence.com): Error:
read(/mail/mailstore01/505/236/bub at confidence.com/.Sent
Items/cur/1168058702.93517743273399070372.fetchmail01,S=1612:2,Sab) failed:
Input/output error (uid=1)


Jan 14 18:41:25 imap01 dovecot: imap(bub at confidence.com): Error: Cached
message size smaller than expected (931 < 1556)
Jan 14 18:41:25 imap01 dovecot: imap(bub at confidence.com): Error: Maildir
filename has wrong S value, renamed the file from /mail/mailstore01/505/236/bub
at confidence.com/.Sent
Items/cur/1168058702.93517743273399070372.fetchmail01,S=931:2,Sab to
/mail/mailstore01/505/236/bub at confidence.com/.Sent
Items/cur/1168058702.93517743273399070372.fetchmail01,S=931:2,Sab
Jan 14 18:41:25 imap01 dovecot: imap(bub at confidence.com): Error: Corrupted
index cache file /mail/index01/505/236/bub at confidence.com/.Sent
Items/dovecot.index.cache: Broken physical size for mail UID 2
Jan 14 18:41:25 imap01 dovecot: imap(bub at confidence.com): Error: Cached
message size smaller than expected (931 < 1556)
Jan 14 18:41:25 imap01 dovecot: imap(bub at confidence.com): Error: Maildir
filename has wrong S value, renamed the file from /mail/mailstore01/505/236/bub
at confidence.com/.Sent
Items/cur/1168058702.93517743273399070372.fetchmail01,S=931:2,Sab to
/mail/mailstore01/505/236/bub at confidence.com/.Sent
Items/cur/1168058702.93517743273399070372.fetchmail01,S=931:2,Sab
Jan 14 18:41:25 imap01 dovecot: imap(bub at confidence.com): Error: Corrupted
index cache file /mail/index01/505/236/bub at confidence.com/.Sent
Items/dovecot.index.cache: Broken physical size for mail UID 2


Jan 14 18:41:53 imap01 dovecot: imap(bub at confidence.com): Error: Cached
message size smaller than expected (931 < 1556)
Jan 14 18:41:53 imap01 dovecot: imap(bub at confidence.com): Error: Maildir
filename has wrong S value, renamed the file from /mail/mailstore01/505/236/bub
at confidence.com/.Sent
Items/cur/1168058702.93517743273399070372.fetchmail01,S=931:2,Sab to
/mail/mailstore01/505/236/bub at confidence.com/.Sent
Items/cur/1168058702.93517743273399070372.fetchmail01,S=931:2,Sab
Jan 14 18:41:53 imap01 dovecot: imap(bub at confidence.com): Error: Corrupted
index cache file /mail/index01/505/236/bub at confidence.com/.Sent
Items/dovecot.index.cache: Broken physical size for mail UID 2
Jan 14 18:41:53 imap01 dovecot: imap(bub at confidence.com): Error: Cached
message size smaller than expected (931 < 1556)
Jan 14 18:41:53 imap01 dovecot: imap(bub at confidence.com): Error: Maildir
filename has wrong S value, renamed the file from /mail/mailstore01/505/236/bub
at confidence.com/.Sent
Items/cur/1168058702.93517743273399070372.fetchmail01,S=931:2,Sab to
/mail/mailstore01/505/236/bub at confidence.com/.Sent
Items/cur/1168058702.93517743273399070372.fetchmail01,S=931:2,Sab
Jan 14 18:41:53 imap01 dovecot: imap(bub at confidence.com): Error: Corrupted
index cache file /mail/index01/505/236/bub at confidence.com/.Sent
Items/dovecot.index.cache: Broken physical size for mail UID 2

Robert Schetterer

2013-Jan-14 20:28 UTC

head link

[Dovecot] Zlib maildir reindex bug?

Am 14.01.2013 20:12, schrieb Richard Platel:> Maildir filename has wrong S value
may not related to index only , it sometimes comes up by upgrading
from 2.0x to 2.1x versions

look

http://www.dovecot.org/list/dovecot/2012-March/064211.html


some soltuions may

try set

maildir_broken_filename_sizes=yes

upgrade dovecot latest version 2.1x ( patches were released )

decompress all compressed mails by script etc



Best Regards
MfG Robert Schetterer

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