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Date:      Fri, 26 Sep 2014 08:40:16 +0200
From:      Hans Ottevanger <hans@beastielabs.net>
To:        freebsd-hackers@freebsd.org
Subject:   Fwd: Autofs: spurious (?) log messages and zombies from automountd
Message-ID:  <54250A50.1000607@beastielabs.net>
In-Reply-To: <54226E4D.1040704@beastielabs.net>
References:  <54226E4D.1040704@beastielabs.net>

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Reposting here (with typos in subject corrected) after no response from 
stable@ for almost two days.

Regards,

Hans


-------- Forwarded Message --------
Subject: Aitofs: spurious (?) jog messages and zombies from automountd
Date: Wed, 24 Sep 2014 09:10:05 +0200
From: Hans Ottevanger <hans@beastielabs.net>
To: freebsd-stable@FreeBSD.org

Hi,

When accessing a directory for the first time on /net, automounted using
the new autofs, I reproducibly get error messages in the log.

I have exported a single directory (read/write) from my test server:

$ showmount -e soekris

Exports list on soekris:
/home

My client runs 10-STABLE, also known as 10.1-BETA2 these days, updated
to r272021. The kernel config is GENERIC minus devices that I do not
have, with AUTOFS added.

When accessing the server for the first time using:

ls /net/soekris/home/hans

I get the expected directory listing but immediately also see the
following in /var/log/messages:

Sep 24 07:39:09 beastie automountd[1554]: child process 2096 terminated
with exit status 1
Sep 24 07:39:09 beastie automountd[1554]: child process 2101 terminated
with exit status 1

Additionally, a zombie process keep hanging forever:

$ pstree 1554
-+= 01554 root /usr/sbin/automountd
  \--- 02106 root <defunct>

When I wait until the directory is autounmounted and retry the access,
the zombie disappears (apparently finally waited for) and I get two
others in return:

$ pstree 1554
-+= 01554 root /usr/sbin/automountd
  |--- 02658 root <defunct>
  \--- 02663 root <defunct>

and a few extra log messages:

Sep 24 08:52:17 beastie automountd[1554]: child process 2106 terminated
with exit status 1
Sep 24 08:52:17 beastie automountd[1554]: child process 2653 terminated
with exit status 1

Is anyone else seeing this?
Do I miss something?
Is this expected behavior?

Kind regards,

Hans






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