diff --git a/ompi/communicator/comm_cid.c b/ompi/communicator/comm_cid.c
index 8ff2cac9ce..9b71f7d629 100644
--- a/ompi/communicator/comm_cid.c
+++ b/ompi/communicator/comm_cid.c
@@ -17,7 +17,7 @@
  * Copyright (c) 2012-2016 Los Alamos National Security, LLC.  All rights
  *                         reserved.
  * Copyright (c) 2012      Oak Ridge National Labs.  All rights reserved.
- * Copyright (c) 2013-2019 Intel, Inc.  All rights reserved.
+ * Copyright (c) 2013-2020 Intel, Inc.  All rights reserved.
  * Copyright (c) 2014-2016 Research Organization for Information Science
  *                         and Technology (RIST). All rights reserved.
  * Copyright (c) 2016      IBM Corporation.  All rights reserved.
@@ -923,7 +923,7 @@ static int ompi_comm_allreduce_pmix_reduce_complete (ompi_comm_request_t *reques
                              cid_context->port_string,
                              cid_context->pmix_tag,
                              cid_context->iter);
-    PMIX_LOAD_KEY(&info, key);
+    PMIX_LOAD_KEY(info.key, key);
     free(key);
     if (bytes_written == -1) {
         opal_output_verbose (verbosity_level, output_id, "writing info.key failed\n");
@@ -934,7 +934,7 @@ static int ompi_comm_allreduce_pmix_reduce_complete (ompi_comm_request_t *reques
                                  cid_context->port_string,
                                  cid_context->pmix_tag,
                                  cid_context->iter);
-        PMIX_LOAD_KEY(&pdat.key, key);
+        PMIX_LOAD_KEY((char*)pdat.key, key);
         free(key);
         if (bytes_written == -1) {
             opal_output_verbose (verbosity_level, output_id, "writing pdat.value.key failed\n");
diff --git a/ompi/interlib/interlib.c b/ompi/interlib/interlib.c
index 34f125282f..69062c5de3 100644
--- a/ompi/interlib/interlib.c
+++ b/ompi/interlib/interlib.c
@@ -14,7 +14,7 @@
  * Copyright (c) 2009      Sun Microsystems, Inc.  All rights reserved.
  * Copyright (c) 2015      Research Organization for Information Science
  *                         and Technology (RIST). All rights reserved.
- * Copyright (c) 2015-2019 Intel, Inc.  All rights reserved.
+ * Copyright (c) 2015-2020 Intel, Inc.  All rights reserved.
  * Copyright (c) 2017      IBM Corporation. All rights reserved.
  * $COPYRIGHT$
  *
@@ -68,12 +68,23 @@ static void model_callback(size_t refid, pmix_status_t status,
     }
 }
 
+static void evhandler_reg_callbk(pmix_status_t status,
+                                 size_t evhandler_ref,
+                                 void *cbdata)
+{
+    opal_pmix_lock_t *lock = (opal_pmix_lock_t*)cbdata;
+
+    lock->status = status;
+    OPAL_PMIX_WAKEUP_THREAD(lock);
+}
+
 int ompi_interlib_declare(int threadlevel, char *version)
 {
     pmix_info_t info[4], directives;
     int ret;
     pmix_status_t rc;
     pmix_status_t code = PMIX_MODEL_DECLARED;
+    opal_pmix_lock_t mylock;
 
     /* Register an event handler for library model declarations  */
     /* give it a name so we can distinguish it */
@@ -82,10 +93,13 @@ int ompi_interlib_declare(int threadlevel, char *version)
      * isn't required so long as the code that generates
      * the event stipulates its range as proc_local. We rely
      * on that here */
-    rc = PMIx_Register_event_handler(&code, 1, &directives, 1, model_callback, NULL, NULL);
+    OPAL_PMIX_CONSTRUCT_LOCK(&mylock);
+    PMIx_Register_event_handler(&code, 1, &directives, 1, model_callback, evhandler_reg_callbk, (void*)&mylock);
+    OPAL_PMIX_WAIT_THREAD(&mylock);
     PMIX_INFO_DESTRUCT(&directives);
-    if (rc < 0) {
-        PMIX_INFO_DESTRUCT(&directives);
+    rc = mylock.status;
+    OPAL_PMIX_DESTRUCT_LOCK(&mylock);
+    if (PMIX_SUCCESS != rc) {
         return OMPI_ERROR;
     }
 
diff --git a/ompi/runtime/ompi_mpi_init.c b/ompi/runtime/ompi_mpi_init.c
index 11f44a5fc3..30bfccefd3 100644
--- a/ompi/runtime/ompi_mpi_init.c
+++ b/ompi/runtime/ompi_mpi_init.c
@@ -370,6 +370,17 @@ static void fence_release(pmix_status_t status, void *cbdata)
     OPAL_POST_OBJECT(active);
 }
 
+static void evhandler_reg_callbk(pmix_status_t status,
+                                 size_t evhandler_ref,
+                                 void *cbdata)
+{
+    opal_pmix_lock_t *lock = (opal_pmix_lock_t*)cbdata;
+
+    lock->status = status;
+    OPAL_PMIX_WAKEUP_THREAD(lock);
+}
+
+
 int ompi_mpi_init(int argc, char **argv, int requested, int *provided,
                   bool reinit_ok)
 {
@@ -382,6 +393,7 @@ int ompi_mpi_init(int argc, char **argv, int requested, int *provided,
     pmix_info_t info[2];
     pmix_status_t rc;
     OMPI_TIMING_INIT(64);
+    opal_pmix_lock_t mylock;
 
     ompi_hook_base_mpi_init_top(argc, argv, requested, provided);
 
@@ -523,10 +535,14 @@ int ompi_mpi_init(int argc, char **argv, int requested, int *provided,
     PMIX_INFO_LOAD(&info[0], PMIX_EVENT_HDLR_PREPEND, NULL, PMIX_BOOL);
     /* give it a name so we can distinguish it */
     PMIX_INFO_LOAD(&info[1], PMIX_EVENT_HDLR_NAME, "MPI-Default", PMIX_STRING);
-    rc = PMIx_Register_event_handler(NULL, 0, info, 2, ompi_errhandler_callback, NULL, NULL);
+    OPAL_PMIX_CONSTRUCT_LOCK(&mylock);
+    PMIx_Register_event_handler(NULL, 0, info, 2, ompi_errhandler_callback, evhandler_reg_callbk, (void*)&mylock);
+    OPAL_PMIX_WAIT_THREAD(&mylock);
+    rc = mylock.status;
+    OPAL_PMIX_DESTRUCT_LOCK(&mylock);
     PMIX_INFO_DESTRUCT(&info[0]);
     PMIX_INFO_DESTRUCT(&info[1]);
-    if (0 > rc) {
+    if (PMIX_SUCCESS != rc) {
         error = "Error handler registration";
         ret = opal_pmix_convert_status(rc);
         goto error;
diff --git a/opal/mca/pmix/pmix4x/openpmix b/opal/mca/pmix/pmix4x/openpmix
index c883ebee78..bc8da6cf72 160000
--- a/opal/mca/pmix/pmix4x/openpmix
+++ b/opal/mca/pmix/pmix4x/openpmix
@@ -1 +1 @@
-Subproject commit c883ebee78b1d88f3a1fb145d31ede74b3c14fa5
+Subproject commit bc8da6cf72f7d6c44f353ac23b3cbf703aa82827
diff --git a/prrte b/prrte
index b571937ec4..d2d3260723 160000
--- a/prrte
+++ b/prrte
@@ -1 +1 @@
-Subproject commit b571937ec4286c4e04a20882f5e02a63176e8190
+Subproject commit d2d32607233f62caad880eba36eb238a3d80e1f5