[Exist-open] XML Entities

[Tobias W. <li...@o2...>]

Hi all,

I posted previously on this matter. I'm updating eXist using XUpdate
queries. Whenever I send content containing xml entities (&aumml;, +
etc.) I will sooner or later get exceptions when loading this content from
the database again (without restarting it). The error is 

org.xmldb.api.base.XMLDBException
        at
org.exist.xmldb.LocalXPathQueryService.execute(LocalXPathQueryService.java:3
46)
        at
org.exist.xmldb.LocalXPathQueryService.execute(LocalXPathQueryService.java:1
31)
	  etc.
Caused by: java.lang.NullPointerException
        at
org.exist.xquery.GeneralComparison.quickNodeSetCompare(GeneralComparison.jav
a:305)
        at
org.exist.xquery.GeneralComparison.eval(GeneralComparison.java:165)
        at
org.exist.xquery.AbstractExpression.eval(AbstractExpression.java:43)
        at org.exist.xquery.PathExpr.eval(PathExpr.java:166)
        at org.exist.xquery.OpAnd.eval(OpAnd.java:57)
        at
org.exist.xquery.AbstractExpression.eval(AbstractExpression.java:43)
        at org.exist.xquery.PathExpr.eval(PathExpr.java:166)
        at org.exist.xquery.Predicate.selectByNodeSet(Predicate.java:150)
        at org.exist.xquery.Predicate.evalPredicate(Predicate.java:111)
        at
org.exist.xquery.LocationStep.applyPredicate(LocationStep.java:103)
        at org.exist.xquery.LocationStep.eval(LocationStep.java:186)
        at
org.exist.xquery.AbstractExpression.eval(AbstractExpression.java:43)
	  etc.

I am trying very hard to provide a junit test for this, but I am unable to
reproduce it on a regular basis although I am tracking this issue for weeks
now. The things I observed so far are:

[1] I send the content using <test><![CDATA[x&z]]></test> sections and end
up with <test>x&amp;y</test> in the database (observed with the graphical
eXist client).

[2] Whenever such pages are inserted into and then loaded from the database,
the above exception occurs sooner or later. Sometimes I do some more updates
before the exception occurs, sometimes the first reload operation already
fails.

[3] The error is *not* observed if I restart eXist and then load the page.
So in my opinion, there must be an error somewhere in the virtual node
representation only, potentially created by the xupdate query.

I am completely clueless on how to proceed. I tried various ways to work
around the xupdate wihtout success. However, I somehow must succeed in
storing such entities.

If anybody has *any* idea, please do not hesitate to advise me.

Thank you very much,

Tobias