Xapian discuss - Apr 2008 - strange exception in clustering branch PHP bindings

Hello, I was testing xapian PHP5 bindings and the clustering svn
branch when I saw this error:

Exception: DatabaseError: inflate failed (invalid distance too far
back) in /usr/local/share/php5/xapian.php on line 1753

Call Stack:
    0.0005     141008   1. {main}() /test/xapian/xapian_insert2.php:0
    6.0653    3377392   2. XapianLib->cluster()
/test/xapian/xapian_insert2.php:59
    6.0654    3377392   3. XapianClusterSingleLink->cluster()
/classes/xapianlib.class.php:193
    6.0654    3377392   4. clustersinglelink_cluster()
/usr/local/share/php5/xapian.php:1753


On line 1753 there is:

ClusterSingleLink_cluster($this->_cPtr,$database,$clusters,$docsim,$docsource,$num_clusters);

The error message seems to be coming form zlib.


-- 
Alessandro Pasotti
w3: www.itopen.it

Alessandro Pasotti wrote:
> Hello, I was testing xapian PHP5 bindings and the clustering svn
> branch when I saw this error:
> 
> Exception: DatabaseError: inflate failed (invalid distance too far
> back) in /usr/local/share/php5/xapian.php on line 1753
> 
> Call Stack:
>     0.0005     141008   1. {main}() /test/xapian/xapian_insert2.php:0
>     6.0653    3377392   2. XapianLib->cluster()
> /test/xapian/xapian_insert2.php:59
>     6.0654    3377392   3. XapianClusterSingleLink->cluster()
> /classes/xapianlib.class.php:193
>     6.0654    3377392   4. clustersinglelink_cluster()
> /usr/local/share/php5/xapian.php:1753
> 
> 
> On line 1753 there is:
> 
>
ClusterSingleLink_cluster($this->_cPtr,$database,$clusters,$docsim,$docsource,$num_clusters);
> 
> The error message seems to be coming form zlib.
Ooh - are you able to reproduce this error reliably?

I've been getting reports of this happening very intermittently from a 
client, but haven't yet been able to reproduce this; they're using the 
clustering branch, but getting it at a different place.  Any help you 
can give me tracking the problem would be gratefully appreciated - the 
first thing is establishing a reproducible testcase.  For the other 
client, this only happens after a couple of Gb of data have been 
processed, unfortunately... :(

-- 
Richard

2008/4/23 Richard Boulton <richard at
lemurconsulting.com>:
>
> Alessandro Pasotti wrote:
>
> > Hello, I was testing xapian PHP5 bindings and the clustering svn
> > branch when I saw this error:
> >
> > Exception: DatabaseError: inflate failed (invalid distance too far
> > back) in /usr/local/share/php5/xapian.php on line 1753
> >
> > Call Stack:
> >    0.0005     141008   1. {main}() /test/xapian/xapian_insert2.php:0
> >    6.0653    3377392   2. XapianLib->cluster()
> > /test/xapian/xapian_insert2.php:59
> >    6.0654    3377392   3. XapianClusterSingleLink->cluster()
> > /classes/xapianlib.class.php:193
> >    6.0654    3377392   4. clustersinglelink_cluster()
> > /usr/local/share/php5/xapian.php:1753
> >
> >
> > On line 1753 there is:
> >
> >
>
ClusterSingleLink_cluster($this->_cPtr,$database,$clusters,$docsim,$docsource,$num_clusters);
> >
> > The error message seems to be coming form zlib.
> >
>
>  Ooh - are you able to reproduce this error reliably?
Richard, can I send you a test case by private mail?


-- 
Alessandro Pasotti
w3:   www.itopen.it

Alessandro Pasotti wrote:
> Richard, can I send you a test case by private mail?
Absolutely.

-- 
Richard