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https://issues.apache.org/jira/browse/AMQ-2536?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Claus Ibsen resolved AMQ-2536.
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Resolution: Fixed
We are now using pre compiled expressions which is faster. That avoids using
the cached xpath api.
> XPath selectors return false if xalan is not on the classpath
> -------------------------------------------------------------
>
> Key: AMQ-2536
> URL: https://issues.apache.org/jira/browse/AMQ-2536
> Project: ActiveMQ
> Issue Type: Bug
> Components: Selector
> Affects Versions: 5.3.0
> Reporter: Roman Kalukiewicz
> Assignee: Claus Ibsen
> Priority: Minor
> Fix For: 5.10.0
>
>
> When xalan.jar is not on the classpath, then
> {{org.apache.activemq.filter.XalanXPathEvaluator}} in {{evaluate()}} method
> tries to load {{org.apache.xpath.CachedXPathAPI}}, throws
> {{NoClassDefFoundError}}, that is catched as {{Throwable}} and {{false}} is
> returned instead of an error.
> No clue is given to the client, that it lacks a jar on the classpath and the
> impression is, that XPath selectors doesn't work and return false whatever
> the message is.
> I believe if we catch {{Exception}} instead of {{Throwable}}, then the
> problem would be fixed.
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