Extra tunnels started on SIGUSR1

Michal 'vorner' Vaner vorner at vorner.cz
Sat Oct 5 10:27:24 BST 2013


I use offlineimap controlled by custom script to synchronize my mail. I use the
preauth tunnel. When I ask it to resynchronize (because the IDLE works only one
way and I want to synchronize when I close email folder in the client) by
sending it the SIGUSR1 signal, it synchronize everything, but extra tunnel
command is started (and more threads). And they accumulate indefinitely (or,
until the OS refuses to start more).

Now, I may be doing something wrong, but I don't have idea what. My config is

This is how it looks at the start (snippet from pstree):

     │        ├─offlineimap─┬─ssh
     │        │             └─7*[{offlineimap}]
     │        └─ssh───4*[{ssh}]

After one SIGUSR1:

     │        ├─offlineimap─┬─2*[ssh]
     │        │             └─9*[{offlineimap}]
     │        └─ssh───4*[{ssh}]

After another two:

     │        ├─offlineimap─┬─4*[ssh]
     │        │             └─15*[{offlineimap}]
     │        └─ssh───4*[{ssh}]

Also, I notice offlineimap threads are accumulating too.

The problem is not urgent for me, since I have a workaround (instead of SIGUSR1,
I just restart offlineimap now), but I think it would be nice to know what is

Thank you

With regards

I never finish anyth

Michal 'vorner' Vaner
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accounts = Lair
fsync = false
pythonfile = ~/.mutt/git-synced/offlineimap.py
#ui = quiet

[Account Lair]
localrepository = Local
remoterepository = Remote
autorefresh = 15
quick = 6
#postsynchook = scan
status_backend = plain

[Repository Local]
type = Maildir
localfolders = ~/.mutt/dir/synced/

[Repository Remote]
type = IMAP
folderfilter = lambda foldername: foldername not in ['INBOX', 'Trash', 'Drafts', 'Sent']
holdconnectionopen = yes
maxconnections = 1
preauthtunnel = exec ssh -q vorner at lair.vorner.cz '/usr/lib/dovecot/imap'
idlefolders = get_all_folders()
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