Since we cannot block when calling abort, and we want to ensure any "show_help" message at least has a chance to get out before we exit, introduce a slight delay into the abort procedure.

Refs trac:4576

This commit was SVN r31601.

The following Trac tickets were found above:
  Ticket 4576 --> https://svn.open-mpi.org/trac/ompi/ticket/4576

orte/mca/ess/base/ess_base_std_app.c

@@ -430,6 +430,7 @@ void orte_ess_base_app_abort(int status, bool report)
 {
     int fd;
     char *myfile;
+    struct timespec tp = {0, 100000};           \
 
     /* Exit - do NOT do a normal finalize as this will very likely
      * hang the process. We are aborting due to an abnormal condition
@@ -453,6 +454,10 @@ void orte_ess_base_app_abort(int status, bool report)
         myfile = opal_os_path(false, orte_process_info.proc_session_dir, "aborted", NULL);
         fd = open(myfile, O_CREAT);
         close(fd);
+        /* now introduce a short delay to allow any pending
+         * messages (e.g., from a call to "show_help") to
+         * have a chance to be sent */
+        nanosleep(&tp, NULL);                                           \
     }
     
     /* - Clean out the global structures