[Dovecot] tests with metadata module

Mihai Badici mihai at badici.ro
Thu Dec 26 12:23:18 EET 2013

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I made some tests with metadata support in dovecot 2.2.10.
Previously I had dovecot 2.2.4 with external metadata plugin who work well.

I use dovecot with roundcube and roundcube plugins from kolab project .
First, the feature activation was tricky and rather undocumented.
I spent about half hour googling, after that I set:

imap_metadata = yes
mail_attribute_dict = file:%h/shared_metadata

I think you cold put those lines in the 20-imap.conf  example file  commented; 
that way will be easy for us to activate.

Because I changed the location of shared_metadata, all folders was unannotated 
I went in folder manager in roundcube and set folder "calendar" as calendar 
type and so on.
That worked and i have:

cat shared_metadata:

However, it looks like the metadata is not properly read after. Calendar and 
Contacts folders don't appear in roundcube.
I have this crash in dovecot's log:

Error: Raw backtrace: /usr/lib/dovecot/libdovecot.so.0(+0x67d81) [0xb7625d81] 
-> /usr/lib/dovecot/libdovecot.so.0(+0x67e11) [0xb7625e11] -> 
/usr/lib/dovecot/libdovecot.so.0(i_fatal+0) [0xb75d6af9] -> dovecot/imap() 
[0x805d3b2] -> dovecot/imap() [0x805d5bc] -> dovecot/imap() [0x805d6c9] -> 
dovecot/imap(client_handle_input+0x56) [0x805d836] -> 
dovecot/imap(client_input+0x72) [0x805dcc2] -> 
/usr/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x38) [0xb7638d98] -> 
/usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0x10e) [0xb7639d6e] -> 
/usr/lib/dovecot/libdovecot.so.0(io_loop_run+0x48) [0xb7638818] -> 
/usr/lib/dovecot/libdovecot.so.0(master_service_run+0x28) [0xb75dcb68] -> 
dovecot/imap(main+0x284) [0x8050f34] -> /lib/libc.so.6(__libc_start_main+0xf5) 
[0xb743f5a5] -> dovecot/imap() [0x80510a5]
Dec 26 09:28:49 imap(mihai.badici): Fatal: master: service(imap): child 4919 
killed with signal 6 (core dumps disabled)

I logged imap sessions in roundcube and I have:

A0003 GETMETADATA "*" (/private/vendor/kolab/folder-type 

On a similar server with the "old" metadata plugin, I have here listed all 
folders with coresponding annotations.

How I can debug further? This is a test server so I can stress it.

Mihai Bădici

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