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Date: Mon, 5 May 2008 23:07:08 +0200
From: "Christophe Taton" <taton@apache.org>
Sender: christophe.taton@gmail.com
To: core-dev@hadoop.apache.org
Subject: Re: Hadoop and VMware
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You should have a look at bin/rcc and bin/hadoop scripts. They contain a
'-Xmx1000m' default JVM parameter.
Also you need to tweak hadoop-site.xml to set an appropriate -Xmx option too
for the task JVMs.

Cheers,
Christophe

On Mon, May 5, 2008 at 11:03 PM, Ahmad Humayun <ahmad.humyn@gmail.com>
wrote:

> Thanks Christophe :) Hadoop is running fine now :)
>
> does anyone know how to reduce this heap requirement....is such a large
> heap
> size being imposed by Hadoop itself? Do I need to set the jvm by using
> -Xms
> settings....anyone knows how to do that?
>
>
> Thanks again to everyone helping out on the mailing list ....all of you
> are
> doing a great job :)
>
> Regards,
>
> On Tue, May 6, 2008 at 1:01 AM, Ahmad Humayun <ahmad.humyn@gmail.com>
> wrote:
>
> > Just tried with 512 MB and 1 GB....and guess what .... it started
> > (finally!!) working at a GB.
> >
> > Is there a way to lower this requirement?.....I'll also just try to hone
> > in into the min. amount of RAM needed.
> >
> > I really can't afford using a GB of RAM for my VM....I will soon run out
> > of juice that way :(
> >
> >
> > Regards,
> >
> >
> > On Tue, May 6, 2008 at 12:49 AM, Ahmad Humayun <ahmad.humyn@gmail.com>
> > wrote:
> >
> > > Well my VM is allocated 256 MB.....I'll just increase it and report
> back
> > >
> > > Plus I have just tried HelloWorld programs....and since they hardly
> have
> > > any memory usage, they work.
> > >
> > >
> > > Regards,
> > >
> > >
> > > On Tue, May 6, 2008 at 12:41 AM, Christophe Taton <taton@apache.org>
> > > wrote:
> > >
> > > > Hi Ahmad,
> > > >
> > > > As the error message suggests it, your issue is likely to be related
> > > > to the
> > > > amount of memory available:
> > > >     Error occurred during initialization of VM
> > > >    Could not reserve enough space for object heap
> > > >
> > > > How much memory did you allocate to your VM? Can you run any other
> > > > Java
> > > > applications in your JVM?
> > > >
> > > > Christophe
> > > >
> > > > On Mon, May 5, 2008 at 9:33 PM, Ahmad Humayun <ahmad.humyn@gmail.com
> >
> > > > wrote:
> > > >
> > > > > Hi there,
> > > > >
> > > > > Has anybody tried running Hadoop on VMware (6.0). I have installed
> > > > open
> > > > > SUSE
> > > > > 10.2 as a guest OS....and I have been trying to get Hadoop
> started,
> > > > but
> > > > > whatever I do with bin/hadoop, I keep getting this error:
> > > > > *Error occurred during initialization of VM
> > > > > Could not reserve enough space for object heap
> > > > > Could not create the Java virtual machine.*
> > > > >
> > > > > Any ideas? Is it a problem with VMware? Or maybe my java
> environment
> > > > > setup?
> > > > > Or I'm simply doing something wrong in setting up Hadoop?
> > > > >
> > > > > Thanks again!
> > > > >
> > > > > Regards,
> > > > > --
> > > > > Ahmad Humayun
> > > > > Research Assistant
> > > > > Computer Science Dpt., LUMS
> > > > > +92 321 4457315
> > > > >
> > > >
> > >
> > >
> > >
> > > --
> > > Ahmad Humayun
> > > Research Assistant
> > > Computer Science Dpt., LUMS
> > > +92 321 4457315
> > >
> >
> >
> >
> > --
> > Ahmad Humayun
> > Research Assistant
> > Computer Science Dpt., LUMS
> > +92 321 4457315
> >
>
>
>
> --
> Ahmad Humayun
> Research Assistant
> Computer Science Dpt., LUMS
> +92 321 4457315
>

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