I apologize - I had to revert this myself as it broke support for backend launches on Torque and SLURM, which a number of us are actively using. Please see the commit message for r21488 for a complete explanation.

Thanks
Ralph


On Fri, Jun 19, 2009 at 8:36 PM, Ralph Castain <rhc@open-mpi.org> wrote:
I'm sorry, but this change is incorrect.

If you look in orte/mca/ess/base/ess_base_std_orted.c, you will see that -all- orteds, regardless of how they are launched, open and select the PLM.

This change causes rsh launched daemons to doubly-open/select the PLM, which is a very bad idea.

Would you please revert this change?

Thanks
Ralph


On Fri, Jun 19, 2009 at 12:50 PM, <coti@osl.iu.edu> wrote:
Author: coti
Date: 2009-06-19 14:50:06 EDT (Fri, 19 Jun 2009)
New Revision: 21480
URL: https://svn.open-mpi.org/trac/ompi/changeset/21480

Log:
Initialize the PML if we are a non-HNP daemon.

If we do not initialize the PML, non-HNP daemons will not be able to use its functions. For example, RSH needs it when the tree_spawn mode is
enabled: daemons call orte_pml.remote_spawn() function to spawn their children in the deployment tree.


Text files modified:
  trunk/orte/mca/ess/env/ess_env_module.c |    14 ++++++++++++++
  1 files changed, 14 insertions(+), 0 deletions(-)

Modified: trunk/orte/mca/ess/env/ess_env_module.c
==============================================================================
--- trunk/orte/mca/ess/env/ess_env_module.c     (original)
+++ trunk/orte/mca/ess/env/ess_env_module.c     2009-06-19 14:50:06 EDT (Fri, 19 Jun 2009)
@@ -150,6 +150,20 @@
            goto error;
        }
        opal_argv_free(hosts);
+
+        /* in case we are asked to spawn remote daemons... */
+        if (ORTE_SUCCESS != (ret = orte_plm_base_open())) {
+            ORTE_ERROR_LOG(ret);
+            error = "orte_plm_base_open";
+            goto error;
+        }
+
+        if (ORTE_SUCCESS != (ret = orte_plm_base_select())) {
+            ORTE_ERROR_LOG(ret);
+            error = "orte_plm_base_select";
+            goto error;
+        }
+
        return ORTE_SUCCESS;
    }

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