[mylvmbackup] Re: File Descriptors Left Open

So LVM does properly close all file descriptors? So that message
basically means "I found this one open and I closed it for you." ?

-Matthew

-----Original Message-----
From: mylvmbackup-bounce@xxxxxxxxxxxxx
[mailto:mylvmbackup-bounce@xxxxxxxxxxxxx] On Behalf Of Thorben Thuermer
Sent: Tuesday, February 10, 2009 3:11 AM
To: mylvmbackup@xxxxxxxxxxxxx
Subject: [mylvmbackup] Re: File Descriptors Left Open

On Mon, 9 Feb 2009 10:05:04 -0600 "Boehm, Matthew"
<mboehm@xxxxxxxxxxxxx> wrote:
[...]
> One thing that bothers me is that we see this "error":
> 
> File descriptor 3 left open
> 
> What I can only guess this comes from is the InnoDB datafile or log
> files because InnoDB doesn't actually do the flushing like MyISAM
does.
> 
> Is there any way to have InnoDB properly close/let go of its open
files
> before doing the snapshot?

this message is _completely_ unrelated to anything mysql...

it's printed by the lvm program,
which on startup does a loop over all fds it does not use, closes them,
and prints
that warning if any were actually open.
(actually nothing unusual at all for any program, but from what i gather
that is a
 precaution against deadlocks being caused by lvm freezing a filesystem
while it
 itself holds a handle for a file on that filesystem.)

these warnings are harmless, and can be surpressed by setting the
environment
variable LVM_SUPPRESS_FD_WARNINGS=1

> -Matthew

Greetings,
 Thorben Thuermer

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