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Re: [Exist-open] Fwd: Fatal Error and various NullPointerException when schedule multiple instances of a xQuery
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From: Adam R. <ad...@ex...> - 2008-06-06 14:32:44
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2008/6/6 Thomas White <tho...@gm...>:
> Adam,
>
> I am using a home grown function hpsu:relative-file-path,
> that works on my windows/jetty system. I suspect you use
> different server and that function returns an incorrect path to
> a XQueary called by fetch-section.xql
>
> What server/environment do you use?
>
> Regards,
> Thomas
>
>
> On 06/06/2008, Adam Retter <ad...@ex...> wrote:
>> Thomas,
>>
>> When I try and call fetch-selection.xql in step (2,2) I get this result -
>>
>> <exception>
>> <path>/db/hpSpy/fetch-section.xql</path>
>> <message>Server returned code 400 [at line 119, column 22]</message>
>> </exception>
>>
>> 2008/6/4 Adam Retter <ad...@ex...>:
>> > Will try and take a look this evening - if you see me on Google chat
>> > please remind me ;-)
>> >
>> > 2008/6/4 Thomas White <tho...@gm...>:
>> >> eXist: 1.2.2-rev:7811-20080530
>> >> JDK: 1.5.0_15
>> >>
>> >> Thanks,
>> >> Thomas
>> >>
>> >> On 04/06/2008, Adam Retter <ad...@ex...> wrote:
>> >>> Hi Thomas,
>> >>>
>> >>> Quickly first, can I ask which version of eXist and Java JDK you are using?
>> >>>
>> >>> Thanks Adam.
>> >>>
>> >>> 2008/6/3 Thomas White <tho...@gm...>:
>> >>> > Dear all,
>> >>> >
>> >>> > I have a XQuery that runs fine when it is executed on its own. When I
>> >>> > schedule multiple instances of this XQuery, after couple of executions
>> >>> > I receive on the eXist command window number of java errors (strangely
>> >>> > enough they are not recorded in exist.log).
>> >>> >
>> >>> > I have attached a zip file with the code that will reproduce the errors.
>> >>> > 1. Please unzip the files with the directory structure in .../webapp/hpSpy
>> >>> > 2. Set the correct password in xmldb:login( "/db", "admin", "pass" )
>> >>> > in fetch-section.xql, fetch-category.xql, select-category.xql and
>> >>> > batch.xql
>> >>> > 2. Execute fetch-section.xql first. It will create all initial data structures.
>> >>> > 3. Start the code with batch.xql?mode=start
>> >>> > 4. Observe eXist command window for errors
>> >>> > 5. Stop the code with batch.xql?mode=stop
>> >>> > Increasing the value of $max-job-per-section at line 120 in batch.xql
>> >>> > will manifest the problems quicker.
>> >>> >
>> >>> > This is a short explanation what batch.xql does:
>> >>> > For each section created by fetch-section.xql (at the moment they are
>> >>> > 5), it creates $max-job-per-section instances
>> >>> > of a dynamically created XQuery that executes select-category.xql
>> >>> > with the section id passed as a parameter. These XQueries are saved
>> >>> > in the database and scheduled to be executed shortly.
>> >>> > When select-category.xql picks up the first category for update from
>> >>> > the passed section and executes fetch-category.
>> >>> > When a scheduled XQuery is called it logs the call in
>> >>> > /db/hpSpy/log/amazon/batch/{section-id}-{instance}.xml
>> >>> >
>> >>> > select-category.xql and select-category.xql can be run without
>> >>> > parameters manually.
>> >>> >
>> >>> > I wrote my first QXuery just 6 weeks ago (and I love it!) and the
>> >>> > world of JAVA is very new to me.
>> >>> > Some of these errors may be trivial оr may be are caused by my lack of
>> >>> > understanding how eXist works.
>> >>> > For me at this moment they are real show stopper. I will really
>> >>> > appreciate any help and advice.
>> >>> >
>> >>> > The top ten lines of the error messages follow bellow.
>> >>> >
>> >>> > Regards,
>> >>> > Thomas
>> >>> >
>> >>> > -------------------------------------------
>> >>> >
>> >>> > [Fatal Error] :836:45: Open quote is expected for attribute "href"
>> >>> > associated with an element type "a".
>> >>> >
>> >>> > java.lang.NullPointerException
>> >>> > at org.exist.stax.EmbeddedXMLStreamReader.readNodeId(EmbeddedXMLStreamReader.java:194)
>> >>> > at org.exist.stax.EmbeddedXMLStreamReader.initNode(EmbeddedXMLStreamReader.java:165)
>> >>> > at org.exist.stax.EmbeddedXMLStreamReader.next(EmbeddedXMLStreamReader.java:221)
>> >>> > at org.exist.storage.dom.DOMFile.findValue(DOMFile.java:1348)
>> >>> > at org.exist.storage.dom.RawNodeIterator.seek(RawNodeIterator.java:135)
>> >>> > at org.exist.stax.EmbeddedXMLStreamReader.reposition(EmbeddedXMLStreamReader.java:134)
>> >>> > at org.exist.storage.NativeBroker.getXMLStreamReader(NativeBroker.java:529)
>> >>> > ...
>> >>> > java.lang.NullPointerException
>> >>> > at org.exist.stax.EmbeddedXMLStreamReader.getAttributeCount(EmbeddedXMLStreamReader.java:286)
>> >>> > at org.exist.dom.NodeProxy.directSelectAttribute(NodeProxy.java:1301)
>> >>> > at org.exist.dom.NodeSetHelper.directSelectAttributes(NodeSetHelper.java:548)
>> >>> > at org.exist.dom.AbstractNodeSet.directSelectAttribute(AbstractNodeSet.java:301)
>> >>> > at org.exist.xquery.LocationStep.getAttributes(LocationStep.java:475)
>> >>> > at org.exist.xquery.LocationStep.eval(LocationStep.java:317)
>> >>> > at org.exist.xquery.AbstractExpression.eval(AbstractExpression.java:59)
>> >>> > at org.exist.xquery.PathExpr.eval(PathExpr.java:238)
>> >>> > at org.exist.xquery.LetExpr.eval(LetExpr.java:150)
>> >>> > at org.exist.xquery.LetExpr.eval(LetExpr.java:201)
>> >>> > ...
>> >>> > java.lang.ClassCastException: org.exist.memtree.ElementImpl
>> >>> > at org.exist.xquery.value.ValueSequence.toNodeSet(ValueSequence.java:207)
>> >>> > at org.exist.xquery.LocationStep.eval(LocationStep.java:296)
>> >>> > at org.exist.xquery.AbstractExpression.eval(AbstractExpression.java:59)
>> >>> > at org.exist.xquery.PathExpr.eval(PathExpr.java:238)
>> >>> > at org.exist.xquery.ConditionalExpression.eval(ConditionalExpression.java:96)
>> >>> > at org.exist.xquery.AbstractExpression.eval(AbstractExpression.java:59)
>> >>> > at org.exist.xquery.PathExpr.eval(PathExpr.java:238)
>> >>> > at org.exist.xquery.LetExpr.eval(LetExpr.java:150)
>> >>> > at org.exist.xquery.LetExpr.eval(LetExpr.java:201)
>> >>> > at org.exist.xquery.LetExpr.eval(LetExpr.java:201)
>> >>> > at org.exist.xquery.LetExpr.eval(LetExpr.java:201)
>> >>> > ...
>> >>> > java.lang.NullPointerException
>> >>> > at org.exist.xquery.functions.transform.Transform$CachedStylesheet.getTemplates(Transform.java:401)
>> >>> > at org.exist.xquery.functions.transform.Transform$CachedStylesheet.<init>(Transform.java:386)
>> >>> > at org.exist.xquery.functions.transform.Transform.getSource(Transform.java:346)
>> >>> > at org.exist.xquery.functions.transform.Transform.createHandler(Transform.java:291)
>> >>> > at org.exist.xquery.functions.transform.Transform.eval(Transform.java:187)
>> >>> > at org.exist.xquery.BasicFunction.eval(BasicFunction.java:68)
>> >>> > at org.exist.xquery.InternalFunctionCall.eval(InternalFunctionCall.java:49)
>> >>> > at org.exist.xquery.AbstractExpression.eval(AbstractExpression.java:59)
>> >>> > at org.exist.xquery.PathExpr.eval(PathExpr.java:238)
>> >>> > at org.exist.xquery.LetExpr.eval(LetExpr.java:150)
>> >>> > at org.exist.xquery.LetExpr.eval(LetExpr.java:201)
>> >>> > ...
>> >>> > java.util.NoSuchElementException
>> >>> > at org.exist.stax.EmbeddedXMLStreamReader.next(EmbeddedXMLStreamReader.java:219)
>> >>> > at org.exist.dom.NodeProxy.directSelectAttribute(NodeProxy.java:1298)
>> >>> > at org.exist.dom.NodeSetHelper.directSelectAttributes(NodeSetHelper.java:548)
>> >>> > at org.exist.dom.AbstractNodeSet.directSelectAttribute(AbstractNodeSet.java:301)
>> >>> > at org.exist.xquery.LocationStep.getAttributes(LocationStep.java:475)
>> >>> > at org.exist.xquery.LocationStep.eval(LocationStep.java:317)
>> >>> > at org.exist.xquery.AbstractExpression.eval(AbstractExpression.java:59)
>> >>> > at org.exist.xquery.PathExpr.eval(PathExpr.java:238)
>> >>> > ...
>> >>> > java.lang.NullPointerException
>> >>> > at org.exist.dom.NodeProxy.getNode(NodeProxy.java:347)
>> >>> > at org.exist.dom.ExtArrayNodeSet.item(ExtArrayNodeSet.java:397)
>> >>> > at org.exist.xquery.update.Modification.selectAndLock(Modification.java:150)
>> >>> > at org.exist.xquery.update.Delete.eval(Delete.java:123)
>> >>> > at org.exist.xquery.AbstractExpression.eval(AbstractExpression.java:59)
>> >>> > ..
>> >>> >
>> >>> >
>> >>> >
>> >>> > --
>> >>> > Thomas White
>> >>> >
>> >>> > 51 Glebewood
>> >>> > Bracknell
>> >>> > Berks RG12 9SD
>> >>> > Mobile:+44 7711 922 966
>> >>> > Skype: thomaswhite
>> >>> > gTalk: thomas.0007
>> >>> > jaxtr: http://www.jaxtr.com/t.white
>> >>> > Linked-In:http://www.linkedin.com/in/thomaswhite0007
>> >>> >
>> >>> >
>> >>> >
>> >>> > --
>> >>> > Thomas White
>> >>> >
>> >>> > 51 Glebewood
>> >>> > Bracknell
>> >>> > Berks RG12 9SD
>> >>> > Mobile:+44 7711 922 966
>> >>> > Skype: thomaswhite
>> >>> > gTalk: thomas.0007
>> >>> > jaxtr: http://www.jaxtr.com/t.white
>> >>> > Linked-In:http://www.linkedin.com/in/thomaswhite0007
>> >>> >
>> >>> > -------------------------------------------------------------------------
>> >>> > This SF.net email is sponsored by: Microsoft
>> >>> > Defy all challenges. Microsoft(R) Visual Studio 2008.
>> >>> > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
>> >>> > _______________________________________________
>> >>> > Exist-open mailing list
>> >>> > Exi...@li...
>> >>> > https://lists.sourceforge.net/lists/listinfo/exist-open
>> >>> >
>> >>> >
>> >>>
>> >>>
>> >>>
>> >>> --
>> >>> Adam Retter
>> >>>
>> >>> eXist Developer
>> >>> { England }
>> >>> ad...@ex...
>> >>> irc://irc.freenode.net/existdb
>> >>>
>> >>
>> >>
>> >> --
>> >> Thomas White
>> >>
>> >> 51 Glebewood
>> >> Bracknell
>> >> Berks RG12 9SD
>> >> Mobile:+44 7711 922 966
>> >> Skype: thomaswhite
>> >> gTalk: thomas.0007
>> >> jaxtr: http://www.jaxtr.com/t.white
>> >> Linked-In:http://www.linkedin.com/in/thomaswhite0007
>> >>
>> >
>> >
>> >
>> > --
>> > Adam Retter
>> >
>> > eXist Developer
>> > { England }
>> > ad...@ex...
>> > irc://irc.freenode.net/existdb
>> >
>>
>>
>>
>> --
>> Adam Retter
>>
>> eXist Developer
>> { England }
>> ad...@ex...
>> irc://irc.freenode.net/existdb
>>
>
>
> --
> Thomas White
>
> 51 Glebewood
> Bracknell
> Berks RG12 9SD
> Mobile:+44 7711 922 966
> Skype: thomaswhite
> gTalk: thomas.0007
> jaxtr: http://www.jaxtr.com/t.white
> Linked-In:http://www.linkedin.com/in/thomaswhite0007
>
--
Adam Retter
eXist Developer
{ England }
ad...@ex...
irc://irc.freenode.net/existdb
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