[svn-r19587] Description:

	Address issue with object headers being created getting evicted from
the metadata cache cache before they are completely initialized.  This is
done by pinning the object header in the cache until it is completely
initialized and attached to a group.

Tested on:
        FreeBSD/32 6.3 (duty) in debug mode
        FreeBSD/64 6.3 (liberty) w/C++ & FORTRAN, in debug mode
        Linux/32 2.6 (jam) w/PGI compilers, w/default API=1.8.x,
                w/C++ & FORTRAN, w/threadsafe, in debug mode
        Linux/64-amd64 2.6 (amani) w/Intel compilers, w/default API=1.6.x,
                w/C++ & FORTRAN, in production mode
        Solaris/32 2.10 (linew) w/deprecated symbols disabled, w/C++ & FORTRAN,
                w/szip filter, w/threadsafe, in production mode
        Linux/PPC 2.6 (heiwa) w/C++ & FORTRAN, w/threadsafe, in debug mode
        Linux/64-ia64 2.6 (cobalt) w/Intel compilers, w/C++ & FORTRAN,
                in production mode
        Linux/64-amd64 2.6 (abe) w/parallel, w/FORTRAN, in debug mode
        Mac OS X/32 10.6.4 (amazon) in debug mode
        Mac OS X/32 10.6.4 (amazon) w/C++ & FORTRAN, w/threadsafe,
                in production mode
        Mac OS X/32 10.6.4 (amazon) w/parallel, in debug mode

1 files changed, 14 insertions, 0 deletions

diff --git a/src/H5D.c b/src/H5D.c
index 91a7c3e..667fe1fb 100644
--- a/src/H5D.c
+++ b/src/H5D.c
@@ -256,6 +256,20 @@ H5Dcreate_anon(hid_t loc_id, hid_t type_id, hid_t space_id, hid_t dcpl_id,
 	HGOTO_ERROR(H5E_DATASET, H5E_CANTREGISTER, FAIL, "unable to register dataset")
 
 done:
+    /* Release the dataset's object header, if it was created */
+    if(dset) {
+        H5O_loc_t *oloc;         /* Object location for dataset */
+
+        /* Get the new dataset's object location */
+        if(NULL == (oloc = H5D_oloc(dset)))
+            HDONE_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "unable to get object location of dataset")
+
+        /* Decrement refcount on dataset's object header in memory */
+        if(H5O_dec_rc_by_loc(oloc, H5AC_dxpl_id) < 0)
+           HDONE_ERROR(H5E_DATASET, H5E_CANTDEC, FAIL, "unable to decrement refcount on newly created object")
+    } /* end if */
+
+    /* Cleanup on failure */
     if(ret_value < 0)
         if(dset && H5D_close(dset) < 0)
             HDONE_ERROR(H5E_DATASET, H5E_CLOSEERROR, FAIL, "unable to release dataset")