Re: [Exist-open] Multifile locking and updating in 20060313

[<sju...@ko...>]

I did the same:

Updated to revision 3065.

Then compiled and started exist - still the same problem. It should =20
be mentioned that the test query manages to do one update in each =20
document before it crashes. Also, since I have EXIST_HOME pointing to =20=

my 20060313 version, it used the data dir found there.

The only modifications I have done to eXist is adding a project =20
specific Cocoon action, a couple of changes to the webapp sitemap, =20
and a few tweaks to conf.xml. I would be happy if more people could =20
run the test, to either repeat the bug or tell me that I'm insane;-)

Sjur

Den 7. apr. 2006 kl. 17.19 skrev Giulio Valentino:

> Hi Sjur,
> I made your test on a fresh svn version
> and cause no problem with a response from gui after some iteration =20
> like
>
> <test>31</test>
> <test>32</test>
> <test>33</test>
> <test>34</test>
> <test>35</test>
> <test>36</test>
> <test>37</test>
> <test>38</test>
> <test>39</test>
> <test>40</test>
>
>
>
> Giulio
>
> XP, Java 1.5_06
>
>
> 2006/4/7, Sjur N=F8rsteb=F8 Moshagen <sju...@ko...>:
>> declare namespace util=3D"http://exist-db.org/xquery/util";
>>
>> declare function local:update() as element()*
>> {
>> let $maxId :=3D max(for $i in //node/@id return xs:integer($i)) + 1
>>
>> let $r :=3D
>>     update insert
>>      <node id=3D"{$maxId}">appended node - sjur A</node>
>>    into doc('/db/C1/test.xml')/root
>>
>> (: This second update crashes eXist - leave it out, and all goes =20
>> well,
>>     include it, and eXist must be restarted to get back to normal: :)
>> let $s :=3D
>>     update insert
>>      <node id=3D"{$maxId}">appended node - sjur B</node>
>>    into doc('/db/C1/test2.xml')/root
>>
>> return
>>    <test>
>>      {$maxId}
>>    </test>
>> };
>>
>> for $i in (1,2,3,4,5,6,7,8,9,10)
>> let $doc :=3D (doc('/db/C1/test.xml'),doc('/db/C1/test2.xml'))
>> let $j :=3D util:exclusive-lock($doc,local:update() )
>> return $j
>>
>> The error is now very different from last time I tried this, and I
>> crash well before I enter the locking issue. Basically I am not able
>> to update two documents at the same time (from within the same
>> function), let alone do that concurrently from two different
>> requests. If I update only one document (see comment within XQuery),
>> all goes well. The two-doc update version triggers a
>> NullPointerException, stacktrace attached below.