On 09/07/2024 09:02, Meinhard Schneider via dovecot wrote:
Hello,
I have a small problem with dovecot-lda. I am using Debian 12 Bookworm:
root@lnxmail01:~# dovecot --version
2.3.13 (89f716dc2)
Historically grown (probably still from sendmail times, long time ago)
I always used procmail for local e-mail delivery. This also included
the call for spamc for SpamAssassin.
I have now changed this and set up a route via sieve. There is a small
script for this:
root@lnxmail01:~# cat /usr/lib/dovecot/sieve-filter/spamc-filter.sh
#!/bin/bash
/usr/bin/spamc
My sieve configuration says (in extracts):
root@lnxmail01:~# head -12 ~meini/.dovecot.sieve
## Generated by Roundcube Webmail SieveRules Plugin ##
require
["body","comparator-i;ascii-numeric","copy","envelope","fileinto","imap4flags","include","regex","relational","spamtestplus","vacation","variables","spamtest"];
include :global "spamc";
# rule:[Spam]
if spamtest :value "ge" :comparator "i;ascii-numeric" "5"
{
fileinto "Spam";
stop;
}
In general, this has been working for many months without any
problems. But sometimes the whole thing fails due to a timeout:
Jul 7 22:00:13 lnxmail01 dovecot:
lda(meini)<766014><G9l7JcPzimY+sAsAmbNf3A>: Error: program
exec:/usr/lib/dovecot/sieve-filter/spamc-filter.sh (766016): Execution
timed out (> 10000 msecs)
Jul 7 22:00:13 lnxmail01 dovecot:
lda(meini)<766014><G9l7JcPzimY+sAsAmbNf3A>: Error: program
exec:/usr/lib/dovecot/sieve-filter/spamc-filter.sh (766016): Forcibly
terminated with signal 15
Jul 7 22:00:13 lnxmail01 dovecot:
lda(meini)<766014><G9l7JcPzimY+sAsAmbNf3A>: Panic: output stream (temp
iostream in /tmp/dovecot.lda. for (program client seekable output)) is
missing error handling
Jul 7 22:00:13 lnxmail01 dovecot:
lda(meini)<766014><G9l7JcPzimY+sAsAmbNf3A>: Error: Raw backtrace:
/usr/lib/dovecot/libdovecot.so.0(backtrace_append+0x42)
[0x7ff00aee04e2] ->
/usr/lib/dovecot/libdovecot.so.0(backtrace_get+0x1e) [0x7ff00aee05fe]
-> /usr/lib/dovecot/libdovecot.so.0(+0xfc49b) [0x7ff00aeec49b] ->
/usr/lib/dovecot/libdovecot.so.0(+0xfc501) [0x7ff00aeec501] ->
/usr/lib/dovecot/libdovecot.so.0(+0x53aee) [0x7ff00ae43aee] ->
/usr/lib/dovecot/libdovecot.so.0(o_stream_unref+0x5e) [0x7ff00af1003e]
-> /usr/lib/dovecot/libdovecot.so.0(program_client_destroy+0x8e)
[0x7ff00ae6ee6e] ->
/usr/lib/dovecot/modules/sieve/lib90_sieve_extprograms_plugin.so(sieve_extprogram_destroy+0x18)
[0x7ff00aacd8f8] ->
/usr/lib/dovecot/modules/sieve/lib90_sieve_extprograms_plugin.so(+0x556d)
[0x7ff00aacb56d] ->
/usr/lib/dovecot/libdovecot-sieve.so.0(sieve_interpreter_continue+0xea)
[0x7ff00ab4c9ba] ->
/usr/lib/dovecot/libdovecot-sieve.so.0(ext_include_execute_include+0x2c7)
[0x7ff00ab72e17] ->
/usr/lib/dovecot/libdovecot-sieve.so.0(sieve_interpreter_continue+0xea)
[0x7ff00ab4c9ba] ->
/usr/lib/dovecot/libdovecot-sieve.so.0(sieve_multiscript_run+0x82)
[0x7ff00ab62b32] ->
/usr/lib/dovecot/modules/lib90_sieve_plugin.so(+0x37a3)
[0x7ff00abd47a3] ->
/usr/lib/dovecot/libdovecot-lda.so.0(mail_deliver+0x176)
[0x7ff00b11f906] -> /usr/lib/dovecot/dovecot-lda(main+0x879)
[0x55ef085e4fb9] ->
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xea)
[0x7ff00ac3ad0a] -> /usr/lib/dovecot/dovecot-lda(_start+0x2a)
[0x55ef085e56ea]
The worst thing is that the entire mail is lost (/dev/null)!
Then I tried to set the timeout higher (than the current 10 seconds):
root@lnxmail01:~# doveconf | grep -A 12 ^plugin
plugin {
sieve = file:~/sieve;active=~/.dovecot.sieve
sieve_execute_exec_timeout = 60s
sieve_extension_exec_timeout = 60s
sieve_extensions = +vnd.dovecot.filter +spamtest +spamtestplus
sieve_filter_bin_dir = /usr/lib/dovecot/sieve-filter
sieve_filter_socket_dir = sieve-filter
sieve_global = /usr/lib/dovecot/sieve-global
sieve_plugins = sieve_extprograms
sieve_spamtest_max_value = 5
sieve_spamtest_status_header = X-Spam-Level
sieve_spamtest_status_type = strlen
}
I have set both the values for "sieve_execute_exec_timeout" and
"sieve_extension_exec_timeout" to 60 sec, but according to the log,
this does not seem to affect the 10000 msec mentioned therein.
The SpamAssassin daemon has enough child processes to handle the
requests (most of them were idle at the time of the error).
How can I configure that the external script gets more time for
execution? And what can I do so that - should the script terminate
contrary to expectations or be killed in the timeout - the mail is not
lost but simply processed further?
Many thanks & best regards
Meinhard
____________________________
Hi Mainhard
I can see the error in the log lines you posted above, but I don't see
anything in your configuration that invokes
/usr/lib/dovecot/sieve-filter/spamc-filter.sh script.
John
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