I’m running dovecot 2.2.27 and pigeonhole 0.4.16 on FreeBSD 11.
I’m using the pigeonhole/sieve external pipe plugin to run a Perl program to
send a Pushover notification when certain messages are received.
The Perl script is executed, and the notification is sent. But then the script
task seems to go zombie until it is killed after a timeout.
In the user’s sieve log, I get a message like
error: msgid=<20170112191921.66140.qm...@v1.redhorse.me>: pipe action: failed
to pipe message to program `sievepush.pl': refer to server log for more
information. [2017-01-12 14:19:36].
(even though the message really was piped to the program successfully)
In the dovecot server log, I see
Jan 12 14:19:21 v1 dovecot: lda(matt): Debug: sieve: Executing script from
`/usr/home/matt/maildoms/.dovecot.svbin'
Jan 12 14:19:21 v1 dovecot: lda(matt): Debug: sieve: action pipe: running
program: sievepush.pl
Jan 12 14:19:21 v1 dovecot: lda(matt): Debug: Mailbox stdin: Opened mail UID=1
because: mail stream
Jan 12 14:19:21 v1 dovecot: lda(matt): Debug: waiting for program
`/usr/local/lib/dovecot/sieve-pipe/sievepush.pl' to finish after 0 msecs
Jan 12 14:19:31 v1 dovecot: lda(matt): Debug: program
`/usr/local/lib/dovecot/sieve-pipe/sievepush.pl'(66145) execution timed out
after 10000 milliseconds: sending TERM signal
Jan 12 14:19:36 v1 dovecot: lda(matt): Debug: program
`/usr/local/lib/dovecot/sieve-pipe/sievepush.pl' (66145) did not die after 5000
milliseconds: sending KILL signal
In the process list during that 10 second interval, I see
matt 66142 29972 801 801 0 S - 0:00.00 bin/qmail-local --
matt /home/matt/maildoms jmn-matt - jmn-m
matt 66143 66142 801 801 0 S - 0:00.00
/var/qmail/bin/preline -f /usr/local/libexec/dovecot/dovecot
matt 66144 66143 801 801 0 S - 0:00.01
/usr/local/libexec/dovecot/dovecot-lda
matt 66145 66144 801 801 0 Z - 0:00.65 <defunct>
I’m not a Unix programming ace, but from what I’ve been able to find out, this
seems to mean that the lda process is forking another process to run the pipe
script, and not getting the proper notification when it finishes (not issuing a
wait?). So after 10 seconds, it sends a TERM to the task which is no longer
running, and when that doesn’t work, it sends a KILL. Anybody know what’s
happening here?
doveconf -n
# 2.2.27 (c0f36b0): /usr/local/etc/dovecot/dovecot.conf
# Pigeonhole version 0.4.16 (fed8554)
# OS: FreeBSD 11.0-RELEASE-p2 amd64
auth_verbose = yes
default_vsz_limit = 128 M
lock_method = flock
mail_debug = yes
mail_location = maildir:~/Maildir
mail_privileged_group = mail
managesieve_notify_capability = mailto
managesieve_sieve_capability = fileinto reject envelope encoded-character
vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy
include variables body enotify environment mailbox date index ihave duplicate
mime foreverypart extracttext vnd.dovecot.pipe vnd.dovecot.execute
namespace inbox {
inbox = yes
location =
prefix =
}
passdb {
args = imap
driver = pam
}
plugin {
recipient_delimiter = -
sieve = file:~/sieve;active=~/.dovecot.sieve
sieve_execute_bin_dir = /usr/local/lib/dovecot/sieve-pipe
sieve_extensions = +vnd.dovecot.pipe +vnd.dovecot.execute
sieve_pipe_bin_dir = /usr/local/lib/dovecot/sieve-pipe
sieve_pipe_exec_timeout = 10s
sieve_plugins = sieve_extprograms
}
protocols = imap
service auth {
unix_listener auth-master {
group = qnofiles
mode = 0660
user = alias
}
user = root
}
service imap-login {
process_min_avail = 3
vsz_limit = 94 M
}
ssl_cert = </usr/local/etc/letsencrypt/live/dummy.redhorse.me/cert.pem
ssl_key = # hidden, use -P to show it
syslog_facility = local0
userdb {
driver = passwd
}
verbose_proctitle = yes
protocol lda {
mail_plugins = " sieve"
}
