diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index ae0057c54ef4edf3079ce5df88d1d4c01054af65..a54b127a7a09c5e4a66e39f560b091bb7fb9fb70 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -1798,6 +1798,13 @@ nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 	__be32 status;
 	struct nfsd4_copy *async_copy = NULL;
 
+	/*
+	 * Currently, async COPY is not reliable. Force all COPY
+	 * requests to be synchronous to avoid client application
+	 * hangs waiting for COPY completion.
+	 */
+	nfsd4_copy_set_sync(copy, true);
+
 	if (nfsd4_ssc_is_inter(copy)) {
 		if (!inter_copy_offload_enable || nfsd4_copy_is_sync(copy)) {
 			status = nfserr_notsupp;