akonadictl fsck: What messages indicate real issues and what to do about them?

Hello.

After Akonadi was still occupied with stuffing all the 67000+ mails of the 
maildir folder I just moved inside KMail between different parent folders of 
the same and only maildir resource, I did a akonadictl stop to stop that 
madness. On next start of Akonadi it luckily forgot what it was about to do. I 
used akonadictl fsck to clean out the mess in file_db_data + db_data and that 
it did.

However even now it still reports some other issues I am not sure about. So I 
ask here: What messages indicicate real issues and what can I do about them?

I am first asking here, but I am willing to provide bug reports for any real 
issues. I store a copy of this fsck run. I don´t provide it in full here due 
to privacy concerns.

# Collections without RID

> Looking for dirty objects...
> Collection "Search" (id: 1) has no RID.
> Collection "OpenInvitations" (id: 395) has no RID.
> Collection "DeclinedInvitations" (id: 396) has no RID.
> Found 3 collections without RID.

I think at least for "Search" this is expected. I am not sure about the other 
two, but it may be expected for them as well.

# Items without RID

> Item "1289323" has no RID.
> Item "1289324" has no RID.
> Item "1289325" has no RID.
> Item "1289326" has no RID.
> Item "1289327" has no RID.
> [… more than 1800 more …]

RID is Remote ID as far as I understood. Yet the remote here is the local 
maildir. So these appear to be items in the database or file_db_data that are 
not inside the maildir. How can I look up these items and check whether this 
is an issue?

# Items with RID that are dirty

> Item "1335889" has RID and is dirty.
> Item "1349287" has RID and is dirty.
> Item "1349736" has RID and is dirty.
> Item "1360764" has RID and is dirty.
> Item "1360766" has RID and is dirty.
> [… easily more than 2000 …]

What about these?

# RID duplicates not matching the content mime-type of the parent collection

What?

> Looking for rid-duplicates not matching the content mime-type of the parent
> collection

Some examples:

> Checking akonadi_icaldir_resource_0
> Found duplicates
> 040000008200E00074C5B7101A82E00800000000201B33D46D12D2010000000000000000100
> 0000085F61ED021447341AA2A15976A6B8FA7

> Checking aros-dev-ml
> Found duplicates 1429563277.R787.merkaba
> Found duplicates 1432116953.R995.merkaba
> Found duplicates 1436178221.R34.merkaba

> Checking oss-security-ml
> Found duplicates 1424451476.R127.merkaba
> Found duplicates 1424451476.R255.merkaba
> Found duplicates 1424453279.R126.merkaba
> […]

Lots more.

Seriously, I am not even sure I want to understand what this is about. But 
well… what is it about?

I think its good for fsck to provide more helpful messages:

1. If its no issue, then don´t report it unless "-v" is given.

2. If its an issue, advice what to do about it.

Thanks,
-- 
Martin