Mercurial push locks

[durwin at mgtsciences.com]

Simon King <simon at simonking.org.uk> wrote on 09/25/2014 03:09:50 AM:

> From: Simon King <simon at simonking.org.uk>
> To: durwin <durwin at mgtsciences.com>
> Cc: Mercurial mailing list <mercurial at selenic.com>
> Date: 09/25/2014 03:10 AM
> Subject: Re: Mercurial push locks
> 
> On Wed, Sep 24, 2014 at 8:06 PM,  <durwin at mgtsciences.com> wrote:
> > Simon King <simon at simonking.org.uk> wrote on 09/24/2014 12:46:36 PM:
> >
> >> From: Simon King <simon at simonking.org.uk>
> >> To: durwin at mgtsciences.com
> >> Cc: Mercurial mailing list <mercurial at selenic.com>
> >> Date: 09/24/2014 12:46 PM
> >> Subject: Re: Mercurial push locks
> >>
> >> On 24 Sep 2014, at 16:16, durwin at mgtsciences.com wrote:
> >>
> >> > I have users when push'ing get locked.  If they interrupt the
> >> push, it appears to complete.  Also, if I delete the lock file in
> >> .hg/store/ it also will complete.  I see no evidence of lost code,
> >> it *does* seem to complete.  This occurs when run from command line
> >> and from Netbeans.  I have tried to duplicate the issue, but all
> >> works for me normally.  I had one user do a clean clone, but the
> >> problem still occurs.  I tried duplicating problem as one of the
> >> users, but again it all works for me.  I am at a loss.  I included
> >> one of the users console output.  Notice where user interrupted 
process.
> >> >
> >> > project:UsersExample username$ hg commit -m "Added a slider to
> >> filter detail.
> >> > Also fixed Joe layout"
> >> > abort: no username supplied (see "hg help config")
> >> > project:UsersExample username$ hg commit -m "Added a slider to
> >> filter detail.
> >> > Also fixed Joe layout" -u username
> >> > project:UsersExample username$ hg push
> >> > pushing to ssh://server//home/svnuser/project-hg/WebApplication
> >> > searching for changes
> >> > remote: listing keys for "bookmarks"
> >> > ^Cinterrupted!
> >> > remote: adding changesets
> >> > remote: changesets: 1 chunks
> >> > remote: add changeset 4fde4613957f
> >> > remote: adding manifests
> >> > remote: manifests: 1/1 chunks (100.00%)
> >> > remote: adding file changes
> >> > remote: adding UsersExample/web/secure/css/main.css revisions
> >> > remote: files: 1/8 chunks (12.50%)
> >> > remote: adding UsersExample/web/secure/css/userInfo.css revisions
> >> > remote: files: 2/8 chunks (25.00%)
> >> > remote: adding UsersExample/web/secure/index.jsp revisions
> >> > remote: files: 3/8 chunks (37.50%)
> >> > remote: adding UsersExample/web/secure/main.js revisions
> >> > remote: files: 4/8 chunks (50.00%)
> >> > remote: adding UsersExample/web/secure/microtasks/DetailsTask.js
> >> > revisions
> >> > remote: files: 5/8 chunks (62.50%)
> >> > remote: adding
> >> > UsersExample/web/secure/summer_api/renderable_alpha/Edge.js
> >> > revisions
> >> > remote: files: 6/8 chunks (75.00%)
> >> > remote: adding UsersExample/web/secure/view/Node.js revisions
> >> > remote: files: 7/8 chunks (87.50%)
> >> > remote: adding UsersExample/web/secure/view/ValidationEdge.js 
revisions
> >> > remote: files: 8/8 chunks (100.00%)
> >> > remote: added 1 changesets with 8 changes to 8 files
> >> > remote: updating the branch cache
> >> > remote: calling hook changegroup.push: hgext.push-ep.push
> >> > remote: Killed by signal 2.
> >> >
> >>
> >> What does the remote changegroup.push hook do? Does it complete?
> >
> > It calls a python hook.
> >
> > [hooks]
> > changegroup.push = python:hgext.push-ep.push
> >
> > This is the code.
> >
> > import logging
> > import os
> > import pwd
> > import syslog
> >
> > def push(ui, repo, node, hooktype, **kwargs):
> >     call(["sudo", "-u", "svnuser", "/usr/bin/hg-svnuser", "push", 
"-f",
> > "--debug", "-R", "/home/svnuser/project-hg/WebApplication/"])
> >     syslog.syslog("Mercurial push by " + pwd.getpwuid(os.getuid())[0])
> >     syslog.syslog(hooktype)
> >     return False
> >
> > The syslog messages are in the log, and when I do hg 
incoming/outgoing, it
> > indicates both repositories are in sync.
> >
> > One user pushes to repository B, it pushes to A.  Other users push to 
A and
> > it pushes to B.
> >
> > This use to work without the locking.  And as I mentioned, it works 
for me
> > (no locking).
> >
> > A bit more history.  It use to lock on me and not on others.  Then, 
without
> > any changes that I am aware of, the reverse began to occur (not atthat 
same
> > time).
> >
> >
> 
> I'm still suspicious of that hook - if I were you I would try
> disabling it to see if the problem goes away.

I am trying this suggestion.  Will need to wait till next time someone 
pushes.

> 
> You could also try setting ui.verbose or ui.debug on the server - that
> might give you some more information.

Already had debug=true.  Added verbose=true

> 
> The fact that it works for some users and not others suggests some
> sort of file permissions problem, perhaps with a cache file? Have a
> poke around in the .hg and .hg/cache directories to see if there are
> files with unexpected permissions.

I suspected this, so I had one person create a new clone with the username 
'svnuser'
(Don't let the name fool you, this is a mercurial repository).  It still 
locked up.
As part of my debugging I would regularly re-cursively set username/group 
to svnuser.
If there was a wrong permission, wouldn't it fail or not complete?

> 
> Hope that helps,
> 
> Simon



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