those specific issues are not pg_admin problems. those come because your client application dropped the connection to the database and postgres logged it.
so either fix the client or have a good look at your network to see if it is flakey.
It is observed that there are very frequent errors related to below: "could not receive data from client: Connection reset by peer. Unexpected EOF on client connection." These are seen heavily in the pg_log files. some of them are seen as fatal errors and the database gets shutdown after the above messages. How do I get rid of these messages.
Is this related to postgres configuration issue or the client/Java program which is not doing proper handshake with postgres database and dropping connections. Please advise.