dovecot - Dec 2013 - Warning: fscking index file /.../dovecot.index

We have often found the below error in VPS servers using OpenVZ, and some
cases using OpenStack, in neither case is used for storage or sharing ISCSI
or NFS

Client can not receive messages via POP3 or IMAP

In /var/log/maillog the message below is seen

Oct 31 15:28:26 vps dovecot: pop3(user at domain.com): Error: Raw backtrace:
/usr/lib64/dovecot/libdovecot.so.0 [0x2b3718e07400] ->
/usr/lib64/dovecot/libdovecot.so.0 [0x2b3718e07456] ->
/usr/lib64/dovecot/libdovecot.so.0 [0x2b3718e06df3] ->
/usr/lib64/dovecot/libdovecot-storage.so.0 [0x2b3718b6566b] ->
/usr/lib64/dovecot/libdovecot-storage.so.0(mail_index_sync_commit+0x89)
[0x2b3718b5ced9] -> /usr/lib64/dovecot/libdovecot-storage.so.0
[0x2b3718aeae4d] -> /usr/lib64/dovecot/libdovecot-storage.so.0
[0x2b3718aea357] -> /usr/lib64/dovecot/libdovecot-storage.so.0
[0x2b3718aea698] ->
/usr/lib64/dovecot/libdovecot-storage.so.0(maildir_storage_sync_init+0xbb)
[0x2b3718aea83b] ->
/usr/lib64/dovecot/libdovecot-storage.so.0(mailbox_sync_init+0x31)
[0x2b3718b15e31] ->
/usr/lib64/dovecot/libdovecot-storage.so.0(mailbox_sync+0x27)
[0x2b3718b18537] -> dovecot/pop3(client_create+0x332) [0x405702] ->
dovecot/pop3 [0x40414b] -> dovecot/pop3 [0x404708] ->
/usr/lib64/dovecot/libdovecot.so.0 [0x2b3718dc9a52] -> /usr/lib

Both POP3 as IMAP

Oct 31 15:24:42 vps dovecot: imap(user at domain.com): Warning: fscking index
file /home/user/mail/domain.com/user/dovecot.index
Oct 31 15:28:26 vps dovecot: pop3(user at domain.com): Warning: fscking index
file /home/user/mail/domain.com/user/dovecot.index


Today I do to solve this the procedure below

- Access the directory mailbox
- Remove files dovecot.index *
- Run the command doveadm index-u $ user @ $ domain-q INBOX

The question is for what reason this only occurs with VPS servers, I do not
find this error on any single physical server to virtual and dovecot
settings are the same.

att

Alex Vitola