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    <div class="moz-cite-prefix">Hi Andrew,<br>
      <br>
      Many thanks for prompt reply. The issue was exactly what you
      described.<br>
      <br>
      I created alternatives for sahara-api, sahara-engine and sahara,
      and left _sahara-subprocess. This is how juno was working hence I
      kept the setup same.<br>
      <br>
      Now I created alternatives for  _sahara-subprocess and it solved
      the issue.<br>
      <br>
      Thanks,<br>
      Amardeep<br>
      <br>
      On Tuesday 02 June 2015 11:01 PM, Andrew Lazarev wrote:<br>
    </div>
    <blockquote
cite="mid:CANzyyshPDSmD+F2g3KpGarfmgK4aN2mp3W8jbDfUXTeMSMP6OA@mail.gmail.com"
      type="cite">
      <div dir="ltr">Hi Amardeep,
        <div><br>
        </div>
        <div>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. </div>
        <div><br>
        </div>
        <div>Thanks,</div>
        <div>Andrew.</div>
      </div>
      <div class="gmail_extra"><br>
        <div class="gmail_quote">On Mon, Jun 1, 2015 at 4:52 AM,
          Amardeep Singh <span dir="ltr"><<a moz-do-not-send="true"
              href="mailto:amardeep@techblue.co.uk" target="_blank">amardeep@techblue.co.uk</a>></span>
          wrote:<br>
          <blockquote class="gmail_quote" style="margin:0 0 0
            .8ex;border-left:1px #ccc solid;padding-left:1ex">
            <div bgcolor="#FFFFFF" text="#000000"> Hi,<br>
              <br>
              I am trying to configure<b> Openstack Sahara </b><b>Kilo</b>
              release on existing <b>Openstack </b><b>Juno</b> setup.
              After successful integration of services and dashboard
              everything works smooth until it start creating cluster. <br>
              <br>
              - Create Node Group Templates for Plugin "vanilla" Hadoop
              Version "2.6"<br>
              - Create Cluster Template for Plugin "vanilla" Hadoop
              Version "2.6"<br>
              - Used sahara-image-elements and created qcow image of
              ubuntu for version 2.6<br>
              - Register image with correct username "ubuntu"<br>
              - Generate key pair and attached to cluster<br>
              - Launch Cluster<br>
              <br>
              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 <b>sahara-all</b><b>.log</b>(attached)<br>
              <br>
              <b><i><small>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']<br>
                    <br>
                    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']</small></i></b><br>
              <br>
              I have also attached sahara.conf file. Any help will be
              appreciated.<br>
              <br>
              Thanks,<br>
              Amardeep<br>
              <br>
            </div>
            <br>
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