[Dovecot] Fatal: Plugin sieve_plugin not found from directory

[John Morris]

Hi list,

Enabling plugins returns fatal errors like the following:
     Jan 16 00:28:11 norman dovecot: deliver(jman at zultron.com): Fatal:
     Plugin sieve_plugin not found from directory /usr/lib64/dovecot/lda

Same errors for loading plugins in the "protocol imap" section of 
dovecot.conf (tested trash_plugin), same errors for loading other 
plugins (tested virtual_plugin), same errors for different spellings of 
"mail_plugins" (lib90_sieve_plugin.so, sieve_plugin.so, sieve_plugin).

The directory must be correct, because if lib90_sieve_plugin.so is 
copied to sieve_plugin.so:
     Jan 16 00:33:16 norman dovecot: deliver(jman at zultron.com): Fatal:
     Multiple files for module sieve_plugin:
     /usr/lib64/dovecot/lda/lib90_sieve_plugin.so,
     /usr/lib64/dovecot/lda/sieve_plugin.so

Invoking the deliver process with strace showed /usr/lib64/dovecot/lda 
being opened, fstated, and getdents returned the expected results, 
including
     {d_ino=67593, d_off=608760247, d_reclen=40,
     d_name="lib90_sieve_plugin.so"}

After this, the plugin (nor any other file, aside from /etc/localtime) 
was not opened, the above error was sent, and deliver exited.

The RPM was recompiled for CentOS 5.1 from an ArkLinux Dovecot 1.2 SRPM; 
the specfile appears to be of the same lineage as the Rawhide Dovecot 
1.1 SRPM, and it's quite straightforward.  I did add the ManageSieve 
patch to it, and otherwise no noteworthy changes.

Others on the list who had this problem usually suffered from 
misspellings in mail_plugins or incorrect mail_plugin_dir; the "multiple 
files" error seems to eliminate this as a possibility.  One other fellow 
had this problem, and fixed it with a recompile; however, since this is 
an SRPM, there's not much room for random changes in the process, and 
recompiling didn't fix the problem.

Without dovecot plugins enabled, dovecot and deliver are working well in 
a postfix/LDAP/virtual domains configuration.

Below is the dovecot -n output.

Thanks

	John

# 1.2.alpha5: /etc/dovecot.conf
# OS: Linux 2.6.18-53.1.13.el5xen x86_64 CentOS release 5 (Final) ext3
protocols: imaps
ssl_ca_file: /etc/pki/tls/cert.pem
ssl_cert_file: /etc/pki/tls/certs/localhost.crt
ssl_key_file: /etc/pki/tls/private/localhost.key
disable_plaintext_auth: yes
login_dir: /var/run/dovecot/login
login_executable: /usr/libexec/dovecot/imap-login
valid_chroot_dirs: /v/mail
max_mail_processes: 10
first_valid_uid: 101
last_valid_uid: 101
first_valid_gid: 12
last_valid_gid: 1000
mail_access_groups: mail
mail_uid: vmail
mail_gid: mail
mail_location: maildir:/v/mail/%n/mail
auth default_with_listener:
   user: doveauth
   verbose: yes
   passdb:
     driver: ldap
     args: /etc/dovecot-ldap.conf
   userdb:
     driver: ldap
     args: /etc/dovecot-ldap.conf
   socket:
     type: listen
     master:
       path: /var/run/dovecot/auth-master
       mode: 384
       user: vmail
       group: mail
plugin:
   sieve: dovecot.sieve



from dovecot.conf:
protocol lda {
   postmaster_address = postmaster at zultron.com
   mail_plugins = sieve_plugin
   mail_plugin_dir = /usr/lib64/dovecot/lda
   sendmail_path = /usr/lib/sendmail.postfix
   auth_socket_path = /var/run/dovecot/auth-master
}