How to detect using whether NFS server is down or not

How to detect using whether NFS server is down or not

[Kapil Dhakad]

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Hello,

I am using WebNFS SDK client provided by sun, with NFS server.
I implemented this client-server architecture in web application,
my web application create some document on the fly and store
it on different server.

I am facing problem, suppose NFS server is down. At that time
WebNFS client continuously make requrest to server and goes into
infinite. How to avoid this problem ?
Is there any way using "JAVA" to detect whether server is down or not ?
What will be solution over it ?

Please reply urgently

Thanks
- Kapil Dhakad

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Re: How to detect using whether NFS server is down or not

[Neil Horman]

On Tue, May 31, 2005 at 06:21:02PM +0530, Kapil Dhakad wrote:
> Hello,
> 
> I am using WebNFS SDK client provided by sun, with NFS server.
> I implemented this client-server architecture in web application,
> my web application create some document on the fly and store
> it on different server.
> 
> I am facing problem, suppose NFS server is down. At that time
> WebNFS client continuously make requrest to server and goes into
> infinite. How to avoid this problem ?
> Is there any way using "JAVA" to detect whether server is down or not ?
> What will be solution over it ?
> 
> Please reply urgently
> 
> Thanks
> - Kapil Dhakad

you can use rpcinfo -u as an rpc ping mechanism to see if the apprpriate
services are still active on the remote host, but doing so won't avoid
occasional hangs on your file system.
Neil

-- 
/***************************************************
 *Neil Horman
 *Software Engineer
 *Red Hat, Inc.
 *nhorman@redhat.com
 *gpg keyid: 1024D / 0x92A74FA1
 *http://pgp.mit.edu
 ***************************************************/


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Re: How to detect using whether NFS server is down or not

[Dan Stromberg]

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On Wed, 2005-06-01 at 07:28 -0400, Neil Horman wrote:
> On Tue, May 31, 2005 at 06:21:02PM +0530, Kapil Dhakad wrote:
> > Hello,
> > 
> > I am using WebNFS SDK client provided by sun, with NFS server.
> > I implemented this client-server architecture in web application,
> > my web application create some document on the fly and store
> > it on different server.
> > 
> > I am facing problem, suppose NFS server is down. At that time
> > WebNFS client continuously make requrest to server and goes into
> > infinite. How to avoid this problem ?
> > Is there any way using "JAVA" to detect whether server is down or not ?
> > What will be solution over it ?
> > 
> > Please reply urgently
> > 
> > Thanks
> > - Kapil Dhakad
> 
> you can use rpcinfo -u as an rpc ping mechanism to see if the apprpriate
> services are still active on the remote host, but doing so won't avoid
> occasional hangs on your file system.
> Neil

On a related note:

http://dcs.nac.uci.edu/~strombrg/rpc-health.html


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