python - Ambari 服务器设置 : OSError: [Errno 2] No such file or directory

Question

我正在尝试使用本教程在我的 EC2 实例上设置 Hadoop。当我收到此错误时，我正在尝试设置 ambari 服务器:

[root@ip-xxx-xxx-xxx-xxx ec2-user]# ambari-server setup
Using python  /usr/bin/python2.6
Setup ambari-server
Checking SELinux...
WARNING: Could not run /usr/sbin/sestatus: OK
Ambari-server daemon is configured to run under user 'root'. Change this setting [y/n] (n)?
Adjusting ambari-server permissions and ownership...
Checking iptables...
Checking JDK...
JCE Policy archive already exists, using /var/lib/ambari-server/resources/jce_policy-6.zip
Completing setup...
Configuring database...
Enter advanced database configuration [y/n] (n)?
Default properties detected. Using built-in database.
Checking PostgreSQL...
Configuring local database...
Connecting to the database. Attempt 1...
Configuring PostgreSQL...
Traceback (most recent call last):
  File "/usr/sbin/ambari-server.py", line 4242, in <module>
    main()
  File "/usr/sbin/ambari-server.py", line 4061, in main
    setup(options)
  File "/usr/sbin/ambari-server.py", line 2129, in setup
    retcode = configure_postgres()
  File "/usr/sbin/ambari-server.py", line 863, in configure_postgres
    configure_pg_hba_postgres_user()
  File "/usr/sbin/ambari-server.py", line 841, in configure_pg_hba_postgres_user
    for line in fileinput.input(PG_HBA_CONF_FILE, inplace=1):
  File "/usr/lib64/python2.6/fileinput.py", line 253, in next
    line = self.readline()
  File "/usr/lib64/python2.6/fileinput.py", line 322, in readline
    os.rename(self._filename, self._backupfilename)
OSError: [Errno 2] No such file or directory

我查过这个，显然 os.rename 只是重命名一个文件，当这个错误发生时，这是因为我试图重命名的文件不存在。但是我不知道它想要重命名什么文件，并且 readline 函数将 self 作为其参数，因此问题可能不会在函数中出现。我对 Python 了解不多，但由于程序做的太多，我不知道在哪里修复它。

Answer 1

不幸的是，还不能评论问题，所以在这里提出建议:请发布命令输出:

rpm -qa | grep ambari 服务器

cat/etc/*release

另外最好知道哪个 postgres 版本可用

rpm -qa | grep postgres

我猜这与python版本有关，但现在只是猜测......