server closed the connection unexpectedly during upgrade

Hi all,

Thank you for your explain for previous question. But I met another error log when running pg_upgrade check from PostgreSQL 8.3 to PostgreSQL 9.4.5:
Performing Consistency Checks
-----------------------------
Checking cluster versions ok
Checking database user is a superuser ok
Checking database connection settings ok
Checking for prepared transactions ok
Checking for reg* system OID user data types ok
Checking for contrib/isn with bigint-passing mismatch ok
Checking for invalid "name" user columns connection to database failed: server closed the connection unexpectedly
This probably means the server terminated abnormally
before or while processing the request.
This issue don't reproduces regularly on windows Server 2012. The error log only reproduces in a few cases, but I need to fix this issue. Can you tell me the reasons for this error.

Best Regards,
Leo

-----Original Message-----
From: Michael Paquier [mailto:michael(dot)paquier(at)gmail(dot)com]
Sent: 2015年12月16日 14:28
To: Yang, Leo
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: [HACKERS] "pg_upgrade" cannot write to log file pg_upgrade_internal.log

On Tue, Dec 15, 2015 at 6:54 PM, Yang, Leo <leo(dot)yang(at)hp(dot)com> wrote:
> I run “pg_upgrade -xx” fromPostgreSQL8.3 to PostgreSQL9.4.5 on window
> server 2008. It will show some wrong information:
>
> cannot write to log file pg_upgrade_internal.log
>
> Failure, exiting.
> It seems that the upgrade can be successful on window 7. It seems to
> be a permissions problem. I get some information about restricting
> privileges from source code, and I find the changes “Run pg_upgrade
> and pg_resetxlog with restricted privileges on Windows, so that they
> don't fail when run by an administrator (refer to
> http://www.postgresql.org/docs/9.4/static/release-9-4-2.html )” for
> release 9.4.2. Why did you do this?

The original commit regarding the use of restricted permissions is that:
commit: 2366761bf9eb8e9aa3820b9f3491bcfc48b8188f
author: Andrew Dunstan <andrew(at)dunslane(dot)net>
date: Mon, 30 Mar 2015 17:16:57 -0400
Run pg_upgrade and pg_resetxlog with restricted token on Windows

And that's a problem that has been discussed here to correct the fact that pg_upgrade cannot run with a user that has administrator rights on Windows:
http://www.postgresql.org/message-id/CAEB4t-NpXGiP5Bqvv3P+d+x=V4BqE+Awg+G7ennBn8icPXep_g@mail.gmail.com

Note that pg_upgrade_internal.log gets opened *before* the restricted token is taken for the process running pg_upgrade when the options are parsed, so it seems hard to believe that your problem and this fix are related.

> How can I solve this problem? I hope you can help me.

I think that you should first check if the user under which you are running the upgrade has sufficient permissions to write those log files. As far as I can see, there is nothing to blame from the code.
--
Michael