Errors running svnsync

[Matthew Weier O'Phinney <ma...@zend.com>]

We have a large repository that we'd like to mirror. After reading the
documentation on repository replication using svnsync, I did the
following:

  * Created 'syncuser' users on both the original system and the system
    hosting the mirror, and shared public SSH keys between them (our
    master repository is available via SSH only).

  * Created a new repository on the mirror system:
    
        svnadmin create /svnmirror

  * Created a pre-revprop-change hook script. Originally, I did as the
    manual suggests, having the script exit with status 0 if the user is
    our syncuser, and with status 1 for other users. However, this
    failed every single time, so it is now simply an empty script.

  * Created a start-commit hook script that exits with status 0 if the
    user is our syncuser, and status 1 for all others.

  * Initialized svnsync, running as user 'syncuser':
  
        svnsync init file:///svnmirror svn+ssh://remote.server/subversion

  * Begain syncing:

        svnsync sync file:///svnmirror

This started out fine. However, when we get to revision 2959 (of around
6100), it fails. At that time, I get the following:

    Committed revision 2958.
    Copied properties for revision 2958.
    svnsync: Path 'XXXX' not present

and svnsync silently fails. Any attempt to restart the sync results in
the same 'path not present' message, and it never completes.

I've checked with the master repository, and it's during that revision
that the path represented by 'XXXX' is initially imported.

We're using subversion 1.4.4 RHEL4 rpms on each machine.

Any ideas?

-- 
Matthew Weier O'Phinney
PHP Developer            | matthew@zend.com
Zend - The PHP Company   | http://www.zend.com/

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Re: Errors running svnsync

[Marc Girod <ma...@iona.com>]

Hello Matthew,

> We have a large repository that we'd like to mirror.

I made myself questions related to yours in a separate thread:

  Running svnsync from post-commit hook

There are some differences in our setups, at least
- you support only svn+ssh, whereas I have the option to use http
  in addition.
- I believe I am a step further, since I have my mirrors in sync.
  My remaining problem is to achieve the synching via the post-commit 
  and post-revpropchange (I don't check the exact name) hooks,
  instead of as so far via crontabs.
- For the crontab synchronization, I do use svn+ssh
- What I have is that I use the same account for owning the
  repositories on both sides, and for the synchronization.

>   * Created a pre-revprop-change hook script. Originally, I did as the
>     manual suggests, having the script exit with status 0 if the user is
>     our syncuser, and with status 1 for other users. However, this
>     failed every single time, so it is now simply an empty script.

I am confronted to the same kind of problem (from the hooks),
but I have so far attempted to obey the instructions nevertheless.

This means that when using crontabs, I do not get these errors!

My understanding is that it is dangerous to let users make 
modifications to the mirror, and that this is the role of this 
hook (and of its counterpart below).

The risk is corrupting the mirror in an irreversible way.

>   * Created a start-commit hook script that exits with status 0 if the
>     user is our syncuser, and status 1 for all others.

Ahum. I understand that the two scripts behave differently...
Thanks for this insight.

> This started out fine. However, when we get to revision 2959 (of around
> 6100), it fails. At that time, I get the following:
> 
>     Committed revision 2958.
>     Copied properties for revision 2958.
>     svnsync: Path 'XXXX' not present
> 
> and svnsync silently fails. Any attempt to restart the sync results in
> the same 'path not present' message, and it never completes.

Could it be that your mirror is corrupted as I feared aboved?
You'd have to compare the revprops...

Marc

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