Monthly Archives: May 2013

Xerces Parse Error with hadoop (or Solr): Feature ‘’ is not recognized.

Hadoop, when used¬†programmatically¬†has the nasty habit of getting messed up when reading it’s own config. The stack traces resemble this one:   Caused by: javax.xml.parsers.ParserConfigurationException: Feature ‘’ is not recognized. at org.apache.xerces.jaxp.DocumentBuilderFactoryImpl.newDocumentBuilder(Unknown Source) at org.apache.hadoop.conf.Configuration.loadResource(   Or this:   Caused … Continue reading

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Issues while migrating from Jetty to tomcat 7

If you use Jetty for development of web apps and have to deploy to a tomcat 7 container, you’ll probably get some unpleasant error messages on start up, especially if you use JSTL. One of these issues might be: SEVERE: … Continue reading

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