title: could not open relation mapping file "global/pg_filenode.map"
body: <p>Please help me out of this problem. I am new to postgresql and i did i big mistake. I am using postgresql 10 and logical replication. I had no knowledge but my server is out of memory today so i find out that pg_wal had soo many wal backups. So I try to figure out a way and perform this command</p>
  
  <pre><code>find $ARCHIVEDIR -type f -mtime +30 -delete
  </code></pre>
  
  <p>and after that i am getting error</p>
  
  <p>could not open relation mapping file "global/pg_filenode.map"</p>
  
  <p>and i am unable to connect my database. It showing  could not connect to server: Connection refused
          Is the server running on host "172.104.169.169" and accepting
          TCP/IP connections on port 5432?
  Please give me some solution. 
  Thanks in advance.
  System - Ubuntu
  Postgresql 10</p>