Re: [Exist-open] Fixed: concurrency issue leading to "document id and proxy id differ

[Joe W. <jo...@gm...>]

Let me also add that the exact same files work perfectly on an eXist
1.2 installation on a different computer -- which helps rule out the
possibility that the TEI file itself is corrupt.  And if it helps, I'm
working exclusively via rest/webdav.  I'd be happy to share any other
info if it helps troubleshoot/guide advice.  Thanks again!
- Joe

On Thu, Apr 10, 2008 at 12:25 PM, Joe Wicentowski <jo...@gm...> wrote:
> Hello all,
>
>  I began to experience the "infamous 'document id and proxy id differ'
>  exceptions" last night and today; it coincided with some frequent
>  updates I was making to a 300kb TEI file via oXygen/webdav.  It has
>  completely ground work to a halt -- at first xqueries execute without
>  pulling data from the TEI file, and eventually the server just gives
>  me 'HTTP ERROR: 400. Error while serializing xml:
>  java.lang.NullPointerException'.  Restarting eXist leads me through
>  this cycle again with no luck -- eXist just won't query the TEI file.
>
>  I understand from Wolfgang's message (2/24/08, below) that a fix to
>  this will be included in the upcoming 1.2.1 release, but in the
>  meantime my question is: Is there a recommended sure-fire way to
>  recover from this error?
>
>  Thanks in advance,
>  Joe
>
>
>  ---
>  Wolfgang's message, Feb. 24, 2008:
>  ---
>  I finally managed to find out what caused the infamous "document id
>  and proxy id differ" exceptions, which have been reported by various
>  users during the past months. The error was the result of a
>  conflicting access to the same document by two threads, one of them
>  updating nodes, the other just reading them. The reading thread
>  modified properties of the document object without having acquired a
>  lock.
>
>  So far I thought the "document id and proxy id differ" exception
>  should not be fatal, but I have to correct myself now: the error may
>  easily lead to corruptions in all indexes, which makes a reindex
>  necessary.
>
>  If someone wants to test the bugfix, please check out the
>  eXist-stable-1.2 branch, which will be the basis for the 1.2.1
>  release:
>
>  http://exist.svn.sourceforge.net/viewvc/exist/branches/eXist-stable-1.2/
>
>  Wolfgang