PG物理复制：主库归档失败，报错找不到路径

ZhangQi

1. 现象描述

在搭建 PostgreSQL 15 物理备库环境后，主备流复制虽然显示已连接，但主、备库日志中持续出现报错：

主库 (Primary) 日志：
LOG: archive command failed with exit code 1
DETAIL: The failed archive command was: cp pg_wal/000000010... /pg18/archive/000000010...
cp: cannot create regular file ‘/pg18/archive/...’: No such file or directory
WARNING: archiving write-ahead log file "..." failed too many times, will try again later

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