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Date: Fri, 10 Apr 2015 10:13:11 +0200
Message-ID: <CAO2ddnbNTJ0SFVzvLYCZYJuG1BZYx-QNhMrhtweQuVU9MPkvmg@mail.gmail.com>
Subject: Re: sshd PID changed
From: BGINFO4X <bginfo4x@kztsoftware.com>
To: cygwin@cygwin.com
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2015-03-11 20:52 GMT+01:00 Mark Geisert <mark@maxrnd.com>:
> Kizito Porta Balanyà writes:
>> No one is interested in this commented behaviour ?
>> Or it is expected as designed ?
>>
>> Thanks a lot for your time.
>>
>> 2015-03-10 10:16 GMT+01:00 Kizito Porta Balanyà:
>> > I'm receiving some rare monit messages related to the sshd service.
>> >
>> > The service "cygrunsrv sshd" is not restarted (eventviewer is OK), but
>> > sometimes (not always) I get the following alerts:
>> >
>> >
>> > Alert 1:
>> > PID changed Service checkMatching_sshd
>> >                  Date:        Mon, 09 Mar 2015 16:14:26
>> >                  Description: process PID changed from 1968 to 1744
>> >
>> > PPID changed Service checkMatching_sshd
>> >                  Date:        Mon, 09 Mar 2015 16:14:26
>> >                  Description: process PPID changed from 5344 to 2860
>
> Are those Windows pids or Cygwin pids?  Was monit built under Cygwin?
>

Sorry, I missed your answer.

They are cygwin pids and monit was built under cygwin.


> Windows processes don't (and can't) change their own pid.  Cygwin processes
> don't have a need to do it and I don't know if it's even possible (by
> mucking around in the shared data segment).  I feel unclean even suggesting
> it might be possible.
>
> What's likely happening is monit is reporting two separate sshd processes as
> if it's talking about the same process.  When you login via sshd, another
> sshd process is created for your session.

Yes you are right.

Procmatch matches 3 sshd process. I should use PIDFILE instead.

Thanks a lot.

> Or perhaps monit is malfunctionally not checking the process startup times
> in addition to the process pids to distinguish between them.
> HTH,
>
> ..mark
>

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