Re: AW: SQLite locking for WCNG on NFS

Mark Phippard <markphip_at_gmail.com> writes:

> Just to clarify. I had two Terminal windows open. In one of them, I
> was in the /branches/2.3.x folder and ran svn up.
>
> In the other, I was in the /trunk folder and ran svn up. This is the
> one that failed and the error message said:
>
> svn: E155004: Working copy '/Users/markphip/work/svnedge' locked.
> subversion/libsvn_wc/wc_db.c:10690: (apr_err=155004)
> svn: E155004: '/Users/markphip/work/svnedge/branches' is already locked.
> svn: run 'svn cleanup' to remove locks (type 'svn help cleanup' for details)
>
> Why did it lock the folder above /branches if /branches is the parent
> of what I was updating?

Locks in 1.7 are recursive by default, which means that when the /trunk
update attempts to lock / it ties to get a recursive lock that includes
/branches and thus fails. I suppose wc could improve concurrency by
getting update to take two locks, a non-recursive lock on parent and a
recursive lock on the target.

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