Error when searching in mailfolders

[Timo Sirainen]

On 29 Jun 2016, at 16:40, Christoph Pleger <Christoph at plmail.de> wrote:
> 
> Hello,
> 
> I just found that with my dovecot 2.2.21, when I use squirrelmail to
> search for something in my mailfolders, that fails with
> 
> ERROR: Connection dropped by IMAP server.
> Query: SEARCH CHARSET ISO-8859-1 ALL FROM "someone"
> 
> That happens for searches in any folder, except from INBOX. When I search
> in all folders, only results from INBOX are found, then the error message
> is shown.
> 
> The log says:
> 
> imap: Error: terminate called after throwing an instance of 'CLuceneError'
> 
> imap(christoph): Fatal: master: service(imap): child 2834 killed with
> signal 6 (core dumps disabled)
> 
> What can I do about that?

Lucene library is throwing an error, which crashes Dovecot. Maybe Dovecot should catch the error, but it would still be broken. Try deleting the lucene indexes and rebuilding them?