[ale] Close port

[Jim Kinney]

I thought lustre went closed source and last GPL version became gluster.
Orangefs has been on radar for a while but not implemented yet. Looks
promising
On Jan 3, 2014 12:44 PM, "Vernard Martin" <vernard at gmail.com> wrote:

>  NFS is ubiquitos but has issues. Try out OrangeFS or Lustre :-)
>
>
> On 1/3/2014 10:49 AM, Jim Kinney wrote:
>
> That makes more sense. It would _have_ to be a kernel thread that choked.
> So NFS is a highly likely culprit. NFS share of an iscsi or fiber channel
> connection that drops and times out has been involved.
>
> If NFS weren't so useful, I would never use it again.
> On Jan 3, 2014 10:22 AM, "Derek Atkins" <derek at ihtfp.com> wrote:
>
>> Jim,
>>
>> On Fri, January 3, 2014 10:03 am, Jim Kinney wrote:
>> > That's the "well behaved" process. I'm looking for a solution at the
>> > kernel
>> > control level that can alter the list of ports the kernel manages for
>> the
>> > aberrant process that hangs with an open port and dies leaving it open.
>> It
>> > feels like a kernel bug to have an open port with no process attached.
>> > Closing a port with the owning process still running would be a useful
>> > tool
>> > for testing that process' response to a system failure.
>>
>> That would be a major kernel bug.  When a process dies (not zombies, but
>> actually gets reaped) all open ports get closed.  I've never seen a kernel
>> fail to reap that properly (although there are socket options to let it be
>> reused quickly, like SO_REUSEADDR).
>>
>> More likely what happened here is that a *kernel thread* died and did not
>> get cleaned up properly.  E.g. if NFS was running out of the kernel and a
>> mountpoint died in a mysterious way, it could be possible that it didn't
>> get reaped properly.  Unlikely, but possible.
>>
>> But yes, it is probably a kernel bug you are seeing.
>>
>> -derek
>>
>> --
>>        Derek Atkins                 617-623-3745
>>        derek at ihtfp.com             www.ihtfp.com
>>        Computer and Internet Security Consultant
>>
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>
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