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Hi Amardeep,

It looks like Sahara engine tries to run "_sahara-subprocess" executable of
other version. Sahara uses real subprocesses to gain all benefits of
multithreading (greenthreads are not enough). It assumes that there is
"_sahara-subprocess" executable in the same folder with sahara engine. They
must be the same version.

Thanks,
Andrew.

On Mon, Jun 1, 2015 at 4:52 AM, Amardeep Singh <amardeep at techblue.co.uk>
wrote:

>  Hi,
>
> I am trying to configure* Openstack Sahara **Kilo* release on existing *Openstack
> **Juno* setup. After successful integration of services and dashboard
> everything works smooth until it start creating cluster.
>
> - Create Node Group Templates for Plugin "vanilla" Hadoop Version "2.6"
> - Create Cluster Template for Plugin "vanilla" Hadoop Version "2.6"
> - Used sahara-image-elements and created qcow image of ubuntu for version
> 2.6
> - Register image with correct username "ubuntu"
> - Generate key pair and attached to cluster
> - Launch Cluster
>
> When cluster launches it creates instances with networking enabled. I can
> ping the nodes and ssh into them using keypair generated, but for some
> reason controller is unable to run ssh commands. The following error comes
> in *sahara-all**.log*(attached)
>
>
>
> *2015-06-01 11:33:37.022 814 ERROR root [-] Original exception being
> dropped: ['Traceback (most recent call last):\n', '  File
> "/opt/openstack/current/sahara/local/lib/python2.7/site-packages/sahara/utils/ssh_remote.py",
> line 630, in _run\n    self._get_conn_params())\n', '  File
> "/opt/openstack/current/sahara/local/lib/python2.7/site-packages/sahara/utils/procutils.py",
> line 51, in run_in_subprocess\n    result = pickle.load(proc.stdout)\n', '
> File "/usr/lib/python2.7/pickle.py", line 1378, in load\n    return
> Unpickler(file).load()\n', '  File "/usr/lib/python2.7/pickle.py", line
> 858, in load\n    dispatch[key](self)\n', '  File
> "/usr/lib/python2.7/pickle.py", line 880, in load_eof\n    raise
> EOFError\n', 'EOFError\n'] 2015-06-01 11:33:37.023 814 ERROR root [-]
> Original exception being dropped: ['Traceback (most recent call last):\n',
> '  File
> "/opt/openstack/current/sahara/local/lib/python2.7/site-packages/sahara/utils/ssh_remote.py",
> line 630, in _run\n    self._get_conn_params())\n', '  File
> "/opt/openstack/current/sahara/local/lib/python2.7/site-packages/sahara/utils/procutils.py",
> line 51, in run_in_subprocess\n    result = pickle.load(proc.stdout)\n', '
> File "/usr/lib/python2.7/pickle.py", line 1378, in load\n    return
> Unpickler(file).load()\n', '  File "/usr/lib/python2.7/pickle.py", line
> 858, in load\n    dispatch[key](self)\n', '  File
> "/usr/lib/python2.7/pickle.py", line 880, in load_eof\n    raise
> EOFError\n', 'EOFError\n']*
>
> I have also attached sahara.conf file. Any help will be appreciated.
>
> Thanks,
> Amardeep
>
>
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