[Dovecot] FTS Lucene: Fatal: master: service(indexer-worker): child * killed with signal 6

[kfx]

Hi List,

Since we migrated from dovecot 1.2.4 to 2.2.12 with lucene as FTS 
engine, I have this in my error log:

Apr 22 14:01:14 indexer-worker(username): Error: lucene index 
/var/vmail/username/lucene-indexes: IndexWriter() failed (#1): Lock 
obtain timed out
Apr 22 14:01:14 indexer-worker: Error: indexer-worker 
[usern...@mydomain.com MailBox-1 - 20800/22707]: 
/home/anotherusername/newnew/clucene/src/core/CLucene/index/DocumentsWriter.cpp:210: 
std::string lucene::index::DocumentsWriter::closeDocStore(): Assertion 
`numDocsInStore*8 == directory->fileLength( (docStoreSegment + "." + 
IndexFileNames::FIELDS_INDEX_EXTENSION).c_str() )' failed.
Apr 22 14:01:14 indexer: Error: Indexer worker disconnected, discarding 
1 requests for usern...@mydomain.com
Apr 22 14:01:14 indexer-worker(usern...@mydomain.com): Fatal: master: 
service(indexer-worker): child 31158 killed with signal 6 (core not dumped)
Apr 22 14:01:16 imap(username): Error: indexer failed to index mailbox 
MailBox-2

Does that sound familiar to someone ?

Thanks.


# 2.2.12: /usr/local/etc/dovecot/dovecot.conf
# OS: Linux 2.6.32-431.11.2.el6.x86_64 x86_64 CentOS release 6.5 (Final) 
ext4
auth_cache_size = 10 M
auth_debug = yes
auth_master_user_separator = *
auth_socket_path = /var/run/dovecot/auth-userdb
auth_username_chars = 
abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890.-_@*
auth_verbose = yes
auth_verbose_passwords = sha1
base_dir = /var/run/dovecot/
debug_log_path = /var/log/dovecot-debug.log
default_client_limit = 2128
default_process_limit = 512
default_vsz_limit = 2 G
hostname = mydomain.com
info_log_path = /var/log/dovecot.log
lda_mailbox_autocreate = yes
lda_mailbox_autosubscribe = yes
listen = *
log_path = /var/log/dovecot-error.log
login_greeting = Welcome
login_log_format_elements = user=<%u> method=%m rip=%r lip=%l mpid=%e %c
mail_debug = yes
mail_gid = vmail
mail_location = maildir:/var/vmail/%Ln
mail_plugins = fts fts_lucene quota stats
mail_uid = vmail
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 ihave
namespace {
  inbox = yes
  location = maildir:/var/vmail/%Ln
  mailbox Drafts {
    auto = subscribe
    special_use = \Drafts
  }
  mailbox Sent {
    auto = subscribe
    special_use = \Sent
  }
  mailbox Trash {
    auto = subscribe
    special_use = \Trash
  }
  prefix =
  type = private
}
passdb {
  args = /usr/local/etc/dovecot/deny-users
  deny = yes
  driver = passwd-file
}
passdb {
  args = /usr/local/etc/dovecot/master-users
  driver = passwd-file
  master = yes
}
passdb {
  args = /usr/local/etc/dovecot/dovecot-ldap.conf.ext
  driver = ldap
}
plugin {
  fts = lucene
  fts_autoindex = yes
  fts_autoindex_max_recent = 1000
  fts_lucene = whitespace_chars=@
  quota = maildir:User quota
  quota_rule = *:storage=20GB
  quota_rule2 = Trash:storage=+200M
  quota_warning = storage=95%% quota-warning 95 %u
  quota_warning2 = storage=80%% quota-warning 80 %u
  sieve = /var/sieve-scripts/%Ln.sieve
  sieve_dir = /var/vmail/%Ln/home/sieve
  stats_command_min_time = 1 mins
  stats_domain_min_time = 12 hours
  stats_ip_min_time = 12 hours
  stats_memory_limit = 16 M
  stats_refresh = 30 secs
  stats_session_min_time = 15 mins
  stats_track_cmds = yes
  stats_user_min_time = 1 hours
}
postmaster_address = postmas...@mydomain.com
protocols = imap pop3 sieve sieve
service auth-worker {
  user = root
}
service auth {
  unix_listener /var/spool/postfix/private/auth {
    mode = 0777
    user = vmail
  }
}
service decode2text {
  executable = script /usr/local/libexec/dovecot/decode2text.sh
  unix_listener decode2text {
    mode = 0666
  }
  user = dovecot
}
service imap-login {
  inet_listener imaps {
    port = 993
    ssl = yes
  }
  process_min_avail = 5
}
service imap {
  process_limit = 1024
}
service managesieve-login {
  inet_listener sieve {
    port = 4190
  }
}
service pop3-login {
  inet_listener pop3s {
    port = 995
    ssl = yes
  }
}
service quota-warning {
  executable = script /usr/local/bin/quota-warning.sh
  user = nobody
}
service stats {
  fifo_listener stats-mail {
    mode = 0600
    user = vmail
  }
}
ssl_cert = </etc/pki/tls/certs/mail.mydomain.com.pem
ssl_key = </etc/pki/tls/private/mail.mydomain.com.key
userdb {
  args = /usr/local/etc/dovecot/dovecot-ldap-userdb.conf.ext
  driver = ldap
  override_fields = uid=vmail gid=vmail home=/var/vmail/%Ln/home
}
verbose_proctitle = yes
protocol lda {
  mail_plugins = fts fts_lucene quota stats sieve virtual
}
protocol imap {
  mail_plugins = fts fts_lucene quota stats imap_quota virtual imap_stats
}