Protect against infinite loops

Flag that we provided a notification and ignore it if it attempts to come back up.

Signed-off-by: Ralph Castain <rhc@open-mpi.org>
(cherry picked from commit ea0d70bc9396def61545e2ce492a55c4c3aa7772)

orte/orted/pmix/pmix_server_gen.c

@@ -356,6 +356,17 @@ void pmix_server_notify(int status, orte_process_name_t* sender,
         }
     }
 
+    /* protect against infinite loops by marking that this notification was
+     * passed down to the server by me */
+    if (NULL == cd->info) {
+        cd->info = OBJ_NEW(opal_list_t);
+    }
+    val = OBJ_NEW(opal_value_t);
+    val->key = strdup("orte.notify.donotloop");
+    val->type = OPAL_BOOL;
+    val->data.flag = true;
+    opal_list_append(cd->info, &val->super);
+
     opal_output_verbose(2, orte_pmix_server_globals.output,
                         "%s NOTIFYING PMIX SERVER OF STATUS %d",
                         ORTE_NAME_PRINT(ORTE_PROC_MY_NAME), ret);
@@ -382,6 +393,14 @@ int pmix_server_notify_event(int code, opal_process_name_t *source,
                         ORTE_NAME_PRINT(ORTE_PROC_MY_NAME),
                         ORTE_NAME_PRINT(source), code);
 
+    /* check to see if this is one we sent down */
+    OPAL_LIST_FOREACH(val, info, opal_value_t) {
+        if (0 == strcmp(val->key, "orte.notify.donotloop")) {
+            /* yep - do not process */
+            goto done;
+        }
+    }
+
     /* a local process has generated an event - we need to xcast it
      * to all the daemons so it can be passed down to their local
      * procs */
@@ -448,6 +467,7 @@ int pmix_server_notify_event(int code, opal_process_name_t *source,
     /* maintain accounting */
     OBJ_RELEASE(sig);
 
+  done:
     /* execute the callback */
     if (NULL != cbfunc) {
         cbfunc(ORTE_SUCCESS, cbdata);