dovecot - Jan 2009 - Errmsgs b4 and after migration DC V1.0.15 to V1.1.8

Last Wednesday at 12:21 I made this switch, which seemed to be 
uneventful.  In any case, no user has reported problems since the 
migration.  Not content to leave well enough alone, this morning I 
scanned the syslog and maillog for dovecot related errors.  What I found 
was that:
Before the Migration==========================I saw a lot of SSL errors that
look like this:
> Jan 14 11:49:23 mercury mail:warn|warning dovecot: imap-login: SSL_read()
syscall failed: Connection reset by peer [69.180.200.184]
> Jan 14 11:52:28 mercury mail:warn|warning dovecot: imap-login: SSL_read()
syscall failed: Connection reset by peer [68.6.82.45]
Which l took to be breakin attempts of some sort, except that I haven't 
seen any since the migration!

After the migration===================================I see errors like
this:
> Jan 14 12:21:45 mercury mail:err|error dovecot: IMAP(eg115): Corrupted
index cache file /var/dcindx/eg115/.imap/INBOX/dovecot.index.cache: Broken MIME
parts for mail UID 1934
> Jan 14 12:21:46 mercury mail:err|error dovecot: IMAP(alexande): Corrupted
index cache file /var/dcindx/alexande/.imap/INBOX/dovecot.index.cache: Broken
MIME parts for mail UID 132641
> Jan 14 12:21:46 mercury mail:err|error dovecot: IMAP(ls454): Corrupted
index cache file /var/dcindx/ls454/.imap/INBOX/dovecot.index.cache: Broken MIME
parts for mail UID 47
> Jan 14 12:21:46 mercury mail:err|error dovecot: IMAP(tr489): Corrupted
index cache file /var/dcindx/tr489/.imap/INBOX/dovecot.index.cache: Broken MIME
parts for mail UID 1
> Jan 14 12:21:54 mercury mail:err|error dovecot: IMAP(bh265): Corrupted
index cache file /var/dcindx/bh265/.imap/INBOX/dovecot.index.cache: Broken MIME
parts for mail UID 2
> Jan 14 12:22:01 mercury mail:err|error dovecot: IMAP(crouch): Corrupted
index cache file /var/dcindx/crouch/.imap/INBOX/dovecot.index.cache: Broken MIME
parts for mail UID 4863
>   
It appears that this error appears the first time a folder is 
referenced, then not again (I think but am not absolutely positive).  
Did the indexing method/format change in some way that would cause this 
(and Dovecot heals itself!) ?  Is there any continuing problem inherent 
in this that needs to be dealt with? 

Thanks!

-- 
"Eppur si muove." (But Still it moves) Galileo, leaving the
Inquisition,
after buckling under the threat of torture and excommunication and 
recanting from his proof that the heavens do not revolve around the 
earth --
Stewart Dean, Unix System Admin, Henderson Computer Center, Bard 
College, Annandale, New York 12504 sdean at bard.edu voice: 845-758-7475, 
fax: 845-758-7035

On Tue, 2009-01-20 at 10:52 -0500, Stewart Dean wrote:
> > Jan 14 11:49:23 mercury mail:warn|warning dovecot: imap-login:
SSL_read() syscall failed: Connection reset by peer [69.180.200.184]
> > Jan 14 11:52:28 mercury mail:warn|warning dovecot: imap-login:
SSL_read() syscall failed: Connection reset by peer [68.6.82.45]
> Which l took to be breakin attempts of some sort, except that I haven't
> seen any since the migration!
That just means you set verbose_ssl=yes and the client disconnected
without sending a "SSL BYE" command. This is normal. Maybe v1.1 hides
these useless messages (I did something related to that at some point).
> After the migration===================================> I see errors
like this:
> > Jan 14 12:21:45 mercury mail:err|error dovecot: IMAP(eg115): Corrupted
index cache file /var/dcindx/eg115/.imap/INBOX/dovecot.index.cache: Broken MIME
parts for mail UID 1934
> > Jan 14 12:21:46 mercury mail:err|error dovecot: IMAP(alexande):
Corrupted index cache file /var/dcindx/alexande/.imap/INBOX/dovecot.index.cache:
Broken MIME parts for mail UID 132641
> > Jan 14 12:21:46 mercury mail:err|error dovecot: IMAP(ls454): Corrupted
index cache file /var/dcindx/ls454/.imap/INBOX/dovecot.index.cache: Broken MIME
parts for mail UID 47
> > Jan 14 12:21:46 mercury mail:err|error dovecot: IMAP(tr489): Corrupted
index cache file /var/dcindx/tr489/.imap/INBOX/dovecot.index.cache: Broken MIME
parts for mail UID 1
> > Jan 14 12:21:54 mercury mail:err|error dovecot: IMAP(bh265): Corrupted
index cache file /var/dcindx/bh265/.imap/INBOX/dovecot.index.cache: Broken MIME
parts for mail UID 2
> > Jan 14 12:22:01 mercury mail:err|error dovecot: IMAP(crouch):
Corrupted index cache file /var/dcindx/crouch/.imap/INBOX/dovecot.index.cache:
Broken MIME parts for mail UID 4863
> >   
> It appears that this error appears the first time a folder is 
> referenced, then not again (I think but am not absolutely positive).  
If it happens only once then don't worry about it. Or perhaps you could
just go and delete all dovecot.index.cache files to avoid these errors
(but that again makes the performance worse temporarily for those whose
files are already fixed).
> Did the indexing method/format change in some way that would cause this 
> (and Dovecot heals itself!) ?  
Maybe, but I can't really think of any specific reason right now.
> Is there any continuing problem inherent 
> in this that needs to be dealt with? 
Hopefully not :)
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