Merge pull request #3978 from karasevb/fix_hangs_pmix1

pmix: fixed immediate request

Author: Ralph Castain

opal/mca/pmix/pmix.h

@@ -146,7 +146,7 @@ extern int opal_pmix_base_exchange(opal_value_t *info,
                             OPAL_NAME_PRINT(*(p)), (s)));                                \
         OBJ_CONSTRUCT(&(_ilist), opal_list_t);                                           \
         _info = OBJ_NEW(opal_value_t);                                                   \
-        _info->key = strdup(OPAL_PMIX_IMMEDIATE);                                        \
+        _info->key = strdup(OPAL_PMIX_OPTIONAL);                                         \
         _info->type = OPAL_BOOL;                                                         \
         _info->data.flag = true;                                                         \
         opal_list_append(&(_ilist), &(_info)->super);                                    \

orte/mca/ess/singleton/ess_singleton_module.c

@@ -249,7 +249,7 @@ static int rte_init(void)
 
 
     /* get our app number from PMI - ok if not found */
-    OPAL_MODEX_RECV_VALUE(ret, OPAL_PMIX_APPNUM,
+    OPAL_MODEX_RECV_VALUE_OPTIONAL(ret, OPAL_PMIX_APPNUM,
                           ORTE_PROC_MY_NAME, &u32ptr, OPAL_UINT32);
     if (OPAL_SUCCESS == ret) {
         orte_process_info.app_num = u32;