[Dovecot] Error: Corrupted index cache file /xxx/yyy/zzz/indexes/.INBOX/dovecot.index.cache: invalid record size

Hi all,

I got a problem with a Dovecot IMAP/POP installation.

Since a recent failure of our distributed file system (no loss of data btw), Dovecot seems to have a problem with index cache files.

For a lot of accounts, I have this error in logs:

Error: Corrupted index cache file /xxx/yyy/zzz/indexes/.INBOX/dovecot.index.cache: invalid record size

If I delete all files from /indexes/ directory, it still occurs...

Do you see what can cause this problem ? Or what information can I provide to help ?

Our distributed FS is MooseFS. Dovecot is configured like if it was NFS (no mmap, etc...).

Thank you for your help :)

Flo