Bug in dovecot 2.3 virtual plugin

Fri Jan 5 11:07:07 EET 2018

Good morning!

I did more research on this error.
The virtual mailboxes are working in two other accounts. The big 
difference to my account is, i have a lot (sub)mailboxes (about 430) and 
a lot emails in my account. The other accounts only have a few emails 
and mailboxes (5 or 6 standard, inbox, trash, templates...)

So i moved all my mailboxes to another place  and left there only a few. 
The virtual mailbox is working.
Then i put back some mailboxes, it is working.
Then i put back the next and the next and tried if the virtual mailbox 
is reachable. it was working, and after i put back more then a half of 
my mailboxes, the error occured again.
dovecot says:

Panic: Leaked view for index 
/var/lib/dovecot/db/indexes/Maildir/jakob/TU-Wien/dovecot.index: Opened 
in index-storage.c:336

The missing dovecot.indes file is now another. But it is on every 
error-message the same missing indes-file.

Deleting the according mailbox, it gets another missing index-file. And 
the every error-message stays on the next indes-file...

It looks to me, it'S a question about too many mailboxes, then an 
internal index gets broken and can't rebuild on the every same point 
(mailbox). This is just an idea, but i don't know how dovecot really 
works...

I do not understand, why it worked till yesterday. And why it breaked on 
deleting not used debian-packages... (maybe this is not the reason)

I removed all my virtual mailboxes from config

Am 04.01.2018 um 22:41 schrieb Jakob Schürz:
> Hi!
> 
> This is very strange...
> This error affects only one mailaccount, and it happend not yesterday.
> The file
> 
> /var/lib/dovecot/db/indexes/Maildir/jakob/INBOX/dovecot.index
> 
> which hat "Panic: Leaked view for index" does not exist. only
> dovecot.index.log and .cache exists in this mailbox. (which is normal
> for small mailboxes, i've read). But why is dovecot throwing an error?
> 
> And i could find out, this is only, when i try to open a virtual folder.
> 
> I switched back to older self-compiled dovecot-versions... but the error
> exists also there (but not before the update!!!)
> 
> I also deleted all the dovecot.index-files, dovecot.index.log and
> dovecot.index.cache-files to let rebuild dovecot the index again... the
> error persists.
> 
> Is it a misconfiguration?
> 
> So i tried to build for the virtual-Mailboxes the Index in memory... the
> error persists and dovecot wants to read this index-file.
> 
> My virtual folders not working any longer (on this account only!)
> 
> For debug purpose i deleted all the emails in this mailbox, the error
> dissapered on this folder, but comes back in the next folder.
> 
> could this be a problem with ulimit?
> 
> greez
> jakob
> 
> Am 2018-01-04 um 11:07 schrieb Jakobus Schürz:
>> Hi!
>>
>> Is this a bug according to the other one?
>>
>> When i try to open a real or virtual mailbox, i often (not on every
>> mailbox) get this error-message:
>>
>> Jän 04 11:03:32 aldebaran dovecot[24534]:
>> imap(jakob)<24705><Ug/EcfBhSrDAqAAO>: Panic: Leaked view for index
>> /var/lib/dovecot/db/indexes/Maildir/jakob/INBOX/dovecot.index: Opened in
>> index-storage.c:336
>> Jän 04 11:03:32 aldebaran dovecot[24534]:
>> imap(jakob)<24705><Ug/EcfBhSrDAqAAO>: Error: Raw backtrace:
>> /usr/local/lib/dovecot/libdovecot.so.0(+0xc6021) [0x7f47d5872021] ->
>> /usr/local/lib/dovecot/libdovecot.so.0(+0xc60ed) [0x7f47d58720ed] ->
>> /usr/local/lib/dovecot/libdovecot.so.0(i_fatal+0) [0x7f47d57e4481] ->
>> /usr/local/lib/dovecot/libdovecot-storage.so.0(+0xf3942)
>> [0x7f47d5c11942] ->
>> /usr/local/lib/dovecot/libdovecot-storage.so.0(index_storage_mailbox_close+0x72)
>> [0x7f47d5be8ec2] ->
>> /usr/local/lib/dovecot/libdovecot-storage.so.0(mailbox_close+0x1a)
>> [0x7f47d5b68c0a] ->
>> /usr/local/lib/dovecot/lib20_virtual_plugin.so(+0xa7e0) [0x7f47d0dd37e0]
>> ->
>> /usr/local/lib/dovecot/lib20_virtual_plugin.so(virtual_backend_box_open+0x2b)
>> [0x7f47d0dd397b] ->
>> /usr/local/lib/dovecot/lib20_virtual_plugin.so(virtual_storage_sync_init+0x1026)
>> [0x7f47d0dd6926] ->
>> /usr/local/lib/dovecot/libdovecot-storage.so.0(mailbox_sync_init+0x4d)
>> [0x7f47d5b6b05d] ->
>> /usr/local/lib/dovecot/libdovecot-storage.so.0(mailbox_sync+0x37)
>> [0x7f47d5b6b117] ->
>> /usr/local/lib/dovecot/libdovecot-storage.so.0(index_storage_get_status+0x31)
>> [0x7f47d5be7781] ->
>> /usr/local/lib/dovecot/lib20_virtual_plugin.so(+0x9b3d) [0x7f47d0dd2b3d]
>> -> /usr/local/lib/dovecot/libdovecot-storage.so.0(+0xaded1)
>> [0x7f47d5bcbed1] -> /usr/local/lib/dovecot/lib01_acl_plugin.so(+0xe975)
>> [0x7f47d5001975] ->
>> /usr/local/lib/dovecot/libdovecot-storage.so.0(mailbox_get_status+0x31)
>> [0x7f47d5b6b4b1] ->
>> /usr/local/lib/dovecot/lib20_virtual_plugin.so(virtual_storage_sync_init+0x114d)
>> [0x7f47d0dd6a4d] ->
>> /usr/local/lib/dovecot/libdovecot-storage.so.0(mailbox_sync_init+0x4d)
>> [0x7f47d5b6b05d] ->
>> /usr/local/lib/dovecot/libdovecot-storage.so.0(mailbox_sync+0x37)
>> [0x7f47d5b6b117] -> dovecot/imap [jakob 192.168.0.14
>> EXAMINE](cmd_select_full+0x171) [0x555d195a91a1] -> dovecot/imap [jakob
>> 192.168.0.14 EXAMINE](command_exec+0x64) [0x555d195b0ca4] ->
>> dovecot/imap [jakob 192.168.0.14 EXAMINE](+0x1b0b2) [0x555d195af0b2] ->
>> dovecot/imap [jakob 192.168.0.14 EXAMINE](+0x1b13c) [0x555d195af13c] ->
>> dovecot/imap [jakob 192.168.0.14 EXAMINE](client_handle_input+0x1a5)
>> [0x555d195af565] -> dovecot/imap [jakob 192.168.0.14
>> EXAMINE](client_input+0x82) [0x555d195afbe2] ->
>> /usr/local/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x69)
>> [0x7f47d5889bf9] ->
>> /usr/local/lib/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0x109)
>> [0x7f47d588b499] ->
>> /usr/local/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0x52)
>> [0x7f47d5889d02]
>> Jän 04 11:03:32 aldebaran dovecot[24534]:
>> imap(jakob)<24705><Ug/EcfBhSrDAqAAO>: Fatal: master: service(imap):
>> child 24705 killed with signal 6 (core dumps disabled)
>>
>> I deinstalled all debian-dovecot-packages and installed the user
>> dovenull manually again. This is all, i did.
>>
>> jakob
> 
> 