PostgreSQL 13.6主从复制执行pg_basebackup时连接中断求助

我们采用PostgreSQL 13.6主从架构，执行pg_basebackup命令从主库获取文件以启动复制时，连接频繁中断。搜索相关错误未找到原因，日志也未提供有效线索。

使用的初始命令及错误 #

命令：

pg_basebackup -h MASTER_IP -U postgres --checkpoint=fast  -D /var/lib/pgsql/13/data/ -R

错误输出：

This probably means the server terminated abnormally
        before or while processing the request.
pg_basebackup: removing data directory /var/lib/pgsql/13/data

主库pg_hba.conf配置 #

local all all trust

# IPv4 local connections:
host    all             all             0.0.0.0/0           md5

host replication all 0.0.0.0/0 trust
host postgres all 0.0.0.0/0 trust
host all all 0.0.0.0/0 trust
host replication all 0.0.0.0/0 trust

# replication privilege.
host  replication postgres SLAVE_IP/32 md5
host replication replication SLAVE_IP/32 md5
-bash-4.2$

已尝试的操作及对应结果 #

• 添加端口参数的命令，执行后仍报错：

  pg_basebackup -h MASTER_IP -p 5432 -U postgres -D /var/lib/pgsql/13/data/ -Fp -Xs -R --checkpoint=fast
  

  从库输出错误：

  FATAL: terminating connection due to administrator command error: could not read COPY data: server closed the connection unexpectedly This probably means the server terminated abnormally before or while processing the request.
  

• 使用tar选项的命令，依旧报错：

  pg_basebackup -h MASTER_IP -p 5432 -U postgres -Ft  --checkpoint=fast -z  --wal-method=none -D - > /var/lib/pgsql/13/data_1/backup.tar
  

  对应错误输出：

  pg_basebackup: error: could not read COPY data: server closed the connection unexpectedly
          This probably means the server terminated abnormally
          before or while processing the request.
  

补充检查信息 #

• 检查主库PostgreSQL目录，未发现root组所属文件：

  [root@master01 data]#  find /var/lib/pgsql/13/data/ -group root
  [root@master01 data]# 
  

• 主库日志仅记录：

  STATEMENT:  BASE_BACKUP LABEL 'pg_basebackup base backup' PROGRESS  FAST NOWAIT    MANIFEST 'yes'   
  

恳请各位帮忙排查原因。

内容的提问来源于stack exchange，提问作者1010111100011