配制dg 报错ORA-03135: connection lost contact RMAN-03015: error occurred in stored script Memory Script

[python_xep]

搭建DG  控制文件拉取完成  但第一个数据文件没有拉完 就报如下错误  请帮分析问题  多谢！

RMAN-03009: failure of backup command on ORA_DISK_1 channel at 02/10/2022 14:21:04
RMAN-10038: database session for channel ORA_DISK_1 terminated unexpectedly
ORACLE error from target database: 
ORA-03135: connection lost contact
Process ID: 204220
Session ID: 6 Serial number: 665

channel ORA_DISK_1 disabled, job failed on it will be run on another channel
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
ORA-03114: not connected to ORACLE
RMAN-03002: failure of Duplicate Db command at 02/10/2022 14:21:04
RMAN-05501: aborting duplication of target database
RMAN-03015: error occurred in stored script Memory Script
RMAN-03009: failure of backup command on default channel at 02/10/2022 14:21:04
RMAN-10038: database session for channel default terminated unexpectedly

[minsic78]

连接异常中断了，看下alert日志会不会有什么线索