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Thread: Error: lmtp-server: Connection lost during data transfer

  1. #1
    Join Date
    Nov 2004
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    283

    Error: lmtp-server: Connection lost during data transfer

    For one account (among 300+ other accounts on the same server), I have this error when there is an email sent to that account.

    Code:
    Jan 22 12:11:13 lmtp(18243): Error: lmtp-server: conn unix:pid=19550,uid=8 [1]: Connection lost during data transfer: read(unix:pid=19550,uid=8 [1]) failed: <no error>
    Tried to search on Google, but still cannot see the reason. Any idea about the reason and how to fix please?

    Thanks.
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  2. #2
    Join Date
    Nov 2004
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    283
    It looks like a bug in Dovecot 2.3. I downgraded to 2.2.33, and the mail was sent in no problem.
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  3. #3
    Join Date
    Mar 2012
    Posts
    191
    Dovecot 2.3.1 still makes some errors
    /var/log/dovecot-lmtp-errors.log
    Code:
    Apr 23 14:51:13 lmtp(8178): Panic: file lib-event.c: line 182 (event_pop_global): assertion failed: (event != NULL)
    Apr 23 14:51:13 lmtp(8178): Error: Raw backtrace: /usr/lib/dovecot/libdovecot.so.0(+0xc9c11) [0x7fc53c4b8c11] -> /usr/lib/dovecot/libdovecot.so.0(+0xc9c69) [0x7fc53c4b8c69] -> /usr/lib/dovecot/libdovecot.so.0(i_fatal+0) [0x7fc53c4283b1] -> /usr/lib/dovecot/libdovecot.so.0(event_pop_global+0xa8) [0x7fc53c4d4d98] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0x4fdb8) [0x7fc53c7b6db8] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_context_deactivate+0x55) [0x7fc53c4d0625] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x89) [0x7fc53c4d0a89] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0x109) [0x7fc53c4d2359] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0x52) [0x7fc53c4d0b72] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_run+0x38) [0x7fc53c4d0d88] -> /usr/lib/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7fc53c44bca3] -> dovecot/lmtp [local READY](main+0x240) [0x5618cfcebda0] -> /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf1) [0x7fc53c0702e1] -> dovecot/lmtp [local READY](_start+0x2a) [0x5618cfcebeea]
    Maybe someone know how to solve this problem.
    Regards
    Last edited by JohnyByk; 04-23-2018 at 05:59 AM.

  4. #4
    Join Date
    Apr 2009
    Location
    Wien / Vienna - Austria
    Posts
    27

    Question

    Quote Originally Posted by JohnyByk View Post
    Dovecot 2.3.1 still makes some errors
    /var/log/dovecot-lmtp-errors.log
    Maybe someone know how to solve this problem.
    Regards
    i am interrested as well , primary: what is the impact of this error ?
    diggin linux since 1998 . . .

  5. #5
    Join Date
    Nov 2006
    Posts
    54
    The impact is that message over 30MB cannot be delivered by Dovecot-lmtp to the local user mail box.
    check https://www.dovecot.org/list/dovecot...il/111501.html and the message chains.
    https://github.com/stephanbosch/dove...msg-size-limit

    By the way, may I know how to downgrade the dovecot to a lower level?
    Last edited by tim874536; 06-12-2018 at 06:26 PM.

  6. #6
    Join Date
    Nov 2004
    Posts
    283
    Quote Originally Posted by tim874536 View Post
    By the way, may I know how to downgrade the dovecot to a lower level?
    You can follow the guide here https://help.directadmin.com/item.php?id=565
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  7. #7
    Join Date
    Nov 2006
    Posts
    54
    Quote Originally Posted by gate2vn View Post
    You can follow the guide here https://help.directadmin.com/item.php?id=565
    Thank you, I got this link too.
    However, I don't know the last version other then 2.3.0 & 2.3.1.

  8. #8
    Join Date
    Apr 2009
    Posts
    2,132
    Dovecot 2.2.36 is the latest version in 2.2.x, and it is available in Custombuild. We run this version without problems, but remember to NOT upgrade dovecot.conf because dovecot.conf 0.3 is not compatible with Dovecot 2.2.x

    Luckily this is a temporary fix, because the fix for attachment limits shuld be available in the next Dovecot 2.3.2 version:

    Release schedule tells me it will be part of 2.3.2, which should roll out some time mid June.
    From: https://www.dovecot.org/pipermail/do...ay/111896.html

  9. #9
    Join Date
    Nov 2006
    Posts
    54
    Quote Originally Posted by ditto View Post
    Dovecot 2.2.36 is the latest version in 2.2.x, and it is available in Custombuild. We run this version without problems, but remember to NOT upgrade dovecot.conf because dovecot.conf 0.3 is not compatible with Dovecot 2.2.x

    Luckily this is a temporary fix, because the fix for attachment limits shuld be available in the next Dovecot 2.3.2 version:



    From: https://www.dovecot.org/pipermail/do...ay/111896.html
    Hi ditto, Thank you for your sharing.

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