Hi,

On 6.7.2014 20:23, Timo Sirainen wrote:
Jul  6 08:11:52 dovecot: imap([email protected]): Panic: file istream.c: line 167 
(i_stream_read): assertion failed: (old_size <= _stream->pos - _stream->skip)
This isn't intended, but I can't seem to be able to reproduce the crash. What's 
your doveconf -n output?

auth_mechanisms = plain apop
auth_verbose = yes
auth_verbose_passwords = plain:5
default_client_limit = 5000
default_process_limit = 1000
default_vsz_limit = 384 M
disable_plaintext_auth = no
first_valid_uid = 89
imap_idle_notify_interval = 6 mins
mail_location = maildir:~/Maildir
mail_plugins = " mail_log notify"
mailbox_list_index = yes
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 duplicate
mbox_write_locks = fcntl
namespace inbox {
  inbox = yes
  location =
  mailbox Drafts {
    auto = subscribe
    special_use = \Drafts
  }
  mailbox Junk {
    special_use = \Junk
  }
  mailbox Sent {
    auto = subscribe
    special_use = \Sent
  }
  mailbox "Sent Messages" {
    special_use = \Sent
  }
  mailbox Spam {
    auto = subscribe
    special_use = \Junk
  }
  mailbox Trash {
    auto = subscribe
    special_use = \Trash
  }
  prefix = INBOX.
  separator = .
}
passdb {
  driver = vpopmail
}
plugin {
  mail_log_events = mailbox_delete mailbox_rename
  sieve = ~/.dovecot.sieve
  sieve_dir = ~/sieve
  sieve_max_script_size = 5M
}
pop3_client_workarounds = outlook-no-nuls oe-ns-eoh
pop3_uidl_format = %f
protocols = imap pop3 lmtp sieve
service imap-login {
  inet_listener imap {
    address = 0.0.0.0
    port = 143
  }
  inet_listener imaps {
    address = 0.0.0.0
    port = 993
  }
}
service managesieve-login {
  inet_listener sieve {
    address = 0.0.0.0
    port = 4190
  }
  service_count = 1
}
service managesieve {
  process_limit = 1024
}
service pop3-login {
  inet_listener pop3 {
    address = 0.0.0.0
    port = 110
  }
  inet_listener pop3s {
    address = 0.0.0.0
    port = 995
  }
}
ssl_cert = </etc/pki/dovecot/certs/dovecot.pem
ssl_cipher_list = RC4-SHA:AES256-SHA:AES128-SHA:DES-CBC3-SHA
ssl_key = </etc/pki/dovecot/private/dovecot.pem
ssl_prefer_server_ciphers = yes
userdb {
  args = quota_template=quota_rule=*:backend=%q
  driver = vpopmail
}
protocol lda {
  mail_plugins = " mail_log notify sieve"
}
protocol imap {
  mail_max_userip_connections = 50
}
protocol sieve {
  mail_max_userip_connections = 10
}

These can of course be fixed with maildir-size-fix.pl and deleting dovecot 
index files, but there are thousands like these. Dovecot 1.2 didn't have any 
issues with these old maildirs transfered over from courierimap.
maildir_broken_filename_sizes=yes restores the old behavior.

Ok will try that too.

I have now enabled coredumps just to see if I can get more info. This 32bit Centos 5.

Thanks,
Toni

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