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Subject: Re: Unmanaged AMs
From: Hitesh Shah <hitesh@apache.org>
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 <CAHg+sbP-W0pWu3RtN8R3sRVPKEpoPrjDqpWkLNLPdMGQYZPpbg@mail.gmail.com>
Date: Sat, 23 Nov 2013 11:17:23 -0800
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To: user@hadoop.apache.org

Hello Kishore,=20

An unmanaged AM has no relation to the language being used. An unmanaged =
AM is an AM that is launched outside of the YARN cluster i.e. manually =
launched elsewhere and not by the RM ( using the application submission =
context provided by a client). It was built to be a dev-tool for =
application developers to be able to test their AMs ( attach debuggers, =
etc ) and is not meant to be something that is used in production.

As for other languages, all interactions with the YARN components is via =
protobuf-based RPC and you could use the appropriate language binding =
for protobuf. Take a look at https://github.com/hortonworks/gohadoop - =
this has code for a YARN app written in Go. There is still some work =
left to get this to work seamlessly for all language types but the go =
code should point you in the right direction.

-- Hitesh

On Nov 21, 2013, at 6:18 AM, Krishna Kishore Bonagiri wrote:

> Hi,
>=20
>   I have seen in comments for code in UnmanagedAMLauncher.java that AM =
can be in any language. What does that mean? Can AM be written in C++ =
language? If so, how would I be able to be connect to RM and how would I =
be able to request for containers? I mean what is the interface doing =
these things? Is there a sample code/example somewhere to get an idea =
about how to do it?
>=20
> Thanks,
> Kishore