From a9245e8384090b1484c165aa8bf6d7afc758f038 Mon Sep 17 00:00:00 2001
From: Jim Edwards <jedwards@ucar.edu>
Date: Fri, 9 Aug 2019 14:36:51 -0600
Subject: [PATCH] must allocate on ioroot for serial io

---
 src/clib/pio_darray.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/clib/pio_darray.c b/src/clib/pio_darray.c
index 9d752c1ee96..a94b98f123a 100644
--- a/src/clib/pio_darray.c
+++ b/src/clib/pio_darray.c
@@ -265,7 +265,7 @@ PIOc_write_darray_multi(int ncid, const int *varids, int ioid, int nvars,
      * large as the largest used to accommodate this serial io
      * method.  */
     rlen = 0;
-    if (iodesc->llen > 0)
+    if (iodesc->llen > 0 || (file->iotype==PIO_IOTYPE_NETCDF || file->iotype == PIO_IOTYPE_NETCDF4C) && ios->iomaster)
         rlen = iodesc->maxiobuflen * nvars;
 
     /* Allocate iobuf. */