+ /*
+ * The metadata stream can be closed by a CLOSE command
+ * just before we attach. It can also be closed by
+ * per-pid tracing during tracing. Therefore, it is
+ * possible that we cannot find this viewer stream.
+ * Reply back to the client with an error if we cannot
+ * find it.
+ */
+ reply.status = htobe32(LTTNG_VIEWER_METADATA_ERR);