Enable singletons to run without any active OOB module until they attempt to comm_spawn

ompi/mca/dpm/orte/dpm_orte.c

@@ -1176,9 +1176,9 @@ static int open_port(char *port_name, orte_rml_tag_t given_tag)
      */
     if ((orte_process_info.proc_type & ORTE_PROC_SINGLETON) &&
         !orte_routing_is_enabled) {
-        if (ORTE_SUCCESS != orte_plm_base_fork_hnp()) {
-            ORTE_ERROR_LOG(ORTE_ERR_FATAL);
-            return ORTE_ERR_FATAL;
+        if (ORTE_SUCCESS != (rc = orte_plm_base_fork_hnp())) {
+            ORTE_ERROR_LOG(rc);
+            return OMPI_ERROR;
         }
         orte_routing_is_enabled = true;
         /* need to init_routes again to redirect messages

orte/mca/ess/singleton/ess_singleton_module.c

@@ -239,21 +239,23 @@ static int rte_init(void)
     }
     OBJ_DESTRUCT(&kvn);
 
-    /* construct the RTE string */
+    /* construct the RTE string, if we have one */
     param = orte_rml.get_contact_info();
-    /* push it out for others to use */
-    OBJ_CONSTRUCT(&kvn, opal_value_t);
-    kvn.key = strdup(OPAL_DSTORE_URI);
-    kvn.type = OPAL_STRING;
-    kvn.data.string = strdup(param);
-    free(param);
-    if (ORTE_SUCCESS != (rc = opal_pmix.put(PMIX_GLOBAL, &kvn))) {
-        ORTE_ERROR_LOG(rc);
+    if (NULL != param) {
+        /* push it out for others to use */
+        OBJ_CONSTRUCT(&kvn, opal_value_t);
+        kvn.key = strdup(OPAL_DSTORE_URI);
+        kvn.type = OPAL_STRING;
+        kvn.data.string = strdup(param);
+        free(param);
+        if (ORTE_SUCCESS != (rc = opal_pmix.put(PMIX_GLOBAL, &kvn))) {
+            ORTE_ERROR_LOG(rc);
+            OBJ_DESTRUCT(&kvn);
+            return rc;
+        }
         OBJ_DESTRUCT(&kvn);
-        return rc;
     }
-    OBJ_DESTRUCT(&kvn);
-
+    
     /* push our local rank */
     OBJ_CONSTRUCT(&kvn, opal_value_t);
     kvn.key = strdup(OPAL_DSTORE_LOCALRANK);

orte/mca/oob/base/oob_base_select.c

@@ -12,7 +12,7 @@
  * Copyright (c) 2007      Cisco Systems, Inc.  All rights reserved.
  * Copyright (c) 2012-2013 Los Alamos National Security, LLC. All rights
  *                         reserved.
- * Copyright (c) 2014      Intel, Inc. All rights reserved.
+ * Copyright (c) 2014-2015 Intel, Inc. All rights reserved.
  * $COPYRIGHT$
  * 
  * Additional copyrights may follow
@@ -115,8 +115,10 @@ int orte_oob_base_select(void)
         }
     }
 
-    if (0 == opal_list_get_size(&orte_oob_base.actives)) {
-        /* no support available means we really cannot run */
+    if (0 == opal_list_get_size(&orte_oob_base.actives) &&
+        !orte_standalone_operation) {
+        /* no support available means we really cannot run unless
+         * we are a singleton */
         opal_output_verbose(5, orte_oob_base_framework.framework_output,
                             "mca:oob:select: Init failed to return any available transports");
         orte_show_help("help-oob-base.txt", "no-interfaces-avail", true);

orte/mca/plm/base/help-plm-base.txt

@@ -10,6 +10,7 @@
 #                         University of Stuttgart.  All rights reserved.
 # Copyright (c) 2004-2005 The Regents of the University of California.
 #                         All rights reserved.
+# Copyright (c) 2015      Intel, Inc. All rights reserved.
 # $COPYRIGHT$
 # 
 # Additional copyrights may follow
@@ -155,3 +156,9 @@ you should use --tune instead. The --tune option allows one to specify mca
 parameters as well as environment variables from within a file using the same
 command line syntax (e.g. -mca var val -mca var "val" -x var=val -x var).
 The --am option will be removed in a future release.
+#
+[no-oob]
+A call was made to launch additional processes, but this process has
+no active out-of-band transports and therefore cannot execute this call.
+Please check to see if you have the "oob" MCA parameter set and ensure
+that it is either unset or at least includes the tcp transport.

orte/mca/plm/base/plm_base_proxy.c

@@ -12,7 +12,7 @@
  * Copyright (c) 2007      Cisco Systems, Inc.  All rights reserved.
  * Copyright (c) 2011-2012 Los Alamos National Security, LLC.
  *                         All rights reserved. 
- * Copyright (c) 2013-2014 Intel, Inc.  All rights reserved.
+ * Copyright (c) 2013-2015 Intel, Inc.  All rights reserved.
  * Copyright (c) 2015      Research Organization for Information Science
  *                         and Technology (RIST). All rights reserved.
  * $COPYRIGHT$
@@ -35,10 +35,12 @@
 #include "orte/util/name_fns.h"
 #include "orte/util/show_help.h"
 #include "orte/mca/errmgr/errmgr.h"
+#include "orte/mca/oob/base/base.h"
 #include "orte/mca/rml/rml.h"
 #include "orte/mca/rml/rml_types.h"
 #include "orte/mca/rml/base/rml_contact.h"
 #include "orte/mca/routed/routed.h"
+#include "orte/mca/state/state.h"
 #include "orte/orted/pmix/pmix_server.h"
 #include "orte/runtime/orte_globals.h"
 #include "orte/runtime/orte_wait.h"
@@ -109,6 +111,13 @@ int orte_plm_proxy_spawn(orte_job_t *jdata)
                          "%s plm:base:proxy spawn child job",
                          ORTE_NAME_PRINT(ORTE_PROC_MY_NAME)));
 
+    /* if we don't have any active OOB modules, then abort */
+    if (0 == opal_list_get_size(&orte_oob_base.actives)) {
+        orte_show_help("help-plm-base.txt", "no-oob", true);
+        ORTE_FORCED_TERMINATE(ORTE_ERR_SILENT);
+        goto CLEANUP;
+    }
+ 
     /* if we are a singleton and the supporting HNP hasn't
      * been spawned, then do so now
      */
@@ -229,6 +238,13 @@ int orte_plm_base_fork_hnp(void)
     int rc;
     orte_jobid_t jobid;
 
+    /* if we don't have any active OOB modules, then abort */
+    if (0 == opal_list_get_size(&orte_oob_base.actives)) {
+        orte_show_help("help-plm-base.txt", "no-oob", true);
+        ORTE_FORCED_TERMINATE(ORTE_ERR_SILENT);
+        return ORTE_ERR_SILENT;
+    }
+ 
     /* A pipe is used to communicate between the parent and child to
        indicate whether the exec ultimately succeeded or failed.  The
        child sets the pipe to be close-on-exec; the child only ever