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From: Wangda Tan <wheeleast@gmail.com>
Date: Tue, 12 Aug 2014 15:20:11 +0800
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 <CAD++eCn8kMcwSPE0KwfMWGqimKmSbb_5_rRPu1uFUcNqs5bhgQ@mail.gmail.com>
Subject: Re: Negative value given by getVirtualCores() or
 getAvailableResources()
To: "user@hadoop.apache.org" <user@hadoop.apache.org>
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By default, vcore = 1 for each resource request. If you don't like this
behavior, you can set yarn.scheduler.minimum-allocation-vcores=0

Hope this helps,
Wangda Tan


On Thu, Aug 7, 2014 at 7:13 PM, Krishna Kishore Bonagiri <
write2kishore@gmail.com> wrote:

> Hi,
>   I am calling getAvailableResources() on AMRMClientAsync and getting -ve
> value for the number virtual cores as below. Is there something wrong?
>
> <memory:16110, vCores:-2>.
>
> I have set the vcores in my yarn-site.xml like this, and just ran an
> application that requires two containers other than the Application
> Master's container. In the ContainerRequest setup from my
> ApplicationMaster, I haven't set anything for virtual cores, means I didn't
> call setVirtualCores() at all.
>
> So, I think it shouldn't be showing a -ve value for the vcores, when I
> call getAvailableResources(), am I wrong?
>
>
> <description> Number of CPU cores that can be allocated for containers.
> </description>
> <name> yarn.nodemanager.resource.cpu-vcores </name>
> <value> 4 </value>
> </property>
>
> Thanks,
> Kishore
>

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<div dir=3D"ltr">By default, vcore =3D 1 for each resource request. If you =
don&#39;t like this behavior, you can set yarn.scheduler.minimum-allocation=
-vcores=3D0=C2=A0<div><br></div><div>Hope this helps,</div><div>Wangda Tan<=
/div><div>

<div><div><br></div></div></div></div><div class=3D"gmail_extra"><br><br><d=
iv class=3D"gmail_quote">On Thu, Aug 7, 2014 at 7:13 PM, Krishna Kishore Bo=
nagiri <span dir=3D"ltr">&lt;<a href=3D"mailto:write2kishore@gmail.com" tar=
get=3D"_blank">write2kishore@gmail.com</a>&gt;</span> wrote:<br>

<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex"><div dir=3D"ltr"><div>Hi,</div><div>=C2=A0 I=
 am calling=C2=A0getAvailableResources() on=C2=A0AMRMClientAsync and gettin=
g -ve value for the number virtual cores as below. Is there something wrong=
?</div>

<div><br></div>&lt;memory:16110, <font color=3D"#0000ff">vCores:-2</font>&g=
t;.<br>
<div><br></div><div>I have set the vcores in my yarn-site.xml like this, an=
d just ran an application that requires two containers other than the Appli=
cation Master&#39;s container. In the=C2=A0ContainerRequest setup from my A=
pplicationMaster, I haven&#39;t set anything for virtual cores, means I did=
n&#39;t call setVirtualCores() at all.</div>


<div><br></div><div>So, I think it shouldn&#39;t be showing a -ve value for=
 the vcores, when I call getAvailableResources(), am I wrong?</div><div><br=
></div><div><br></div><div><div>&lt;description&gt; Number of CPU cores tha=
t can be allocated for containers. &lt;/description&gt;</div>


<div>&lt;name&gt; yarn.nodemanager.resource.cpu-vcores &lt;/name&gt;</div><=
div>&lt;value&gt; 4 &lt;/value&gt;</div><div>&lt;/property&gt;</div></div><=
div><br></div><div>Thanks,</div><div>Kishore</div></div>
</blockquote></div><br></div>

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