Re: [SOLVED] vpopmail POP: "ERR aac, chiled crashed" after reboot, core dumped

From: Chris Shenton (chris_at_shenton.org)
Date: 09/17/03

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    To: vchkpw@inter7.com
Date: Wed, 17 Sep 2003 11:46:05 -0400

    Chris Shenton <chris@shenton.org> writes:

    > The machine was recently rebooted and vpopmail's POP now crashes upon
    > successful authentication (names changed for privacy, sorry):
    >
    > chris@PECTOPAH<104> telnet foo.example.net pop3
    > +OK <32620.1063584541@foo.example.net>
    > user chris@email.zz
    > +OK
    > pass MyPass
    > -ERR aack, child crashed

    I rebuilt the OS, rebuilt the kernel, rebuilt vpopmail (same version)
    -- to no affect. I was able to get it working again with a relatively
    minor fix. I'm documenting it here in case it helps anyone else.

    In /usr/local/vpopmail/etc/ there are files: open-smtp,
    open-smtp.lock, and tcp.smtp. I removed the lock file and renamed the
    other two to get them out of the way:

    -rw-r--r-- 1 root vchkpw 1874 Sep 17 08:11 open-smtp
    -rw-r--r-- 1 root vchkpw 302746 Sep 13 10:00 open-smtp.HIDE
    -rw-r--r-- 1 root vchkpw 0 Sep 17 07:55 open-smtp.lock
    -rw-r--r-- 1 vpopmail vchkpw 4015 Sep 17 08:11 tcp.smtp.cdb
    -rw-r--r-- 1 vpopmail vchkpw 2112 Sep 17 07:59 tcp.smtp.cdb.HIDE

    I was then able to POP in sucessfully.

    Is there some way I should have been able to detect this problem?
    Perhaps cranking up a debug flag and examining logs?

    I don't know the code enough to know which binaries use these, but it
    looks like they all use open-smtp. Any clues for future similar
    problems would be appreciated. If crash-related damage caused this,
    is it something that's worked-around in modern versions of vpopmail?

    Thanks.

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