expdp 导出时指定节点

在用expdp 导出数据时碰到如下错误， 原因是当时在指定useid 时未指定数据库节点。 useid=username/password@ rac_node1 Export: Release 11.2.0.4.0 - Production on Wed Mar 23 13:18:16 2022 Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved. Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP, Data Mining and Real Application Testing options ORA-39002: invalid operation ORA-39070: Unable to open the log file. ORA-29283: invalid file operation ORA-06512: at "SYS.UTL_FILE", line 536 ORA-29283: invalid file operation