org.apache.xerces.jaxp.SAXParserFactoryImpl not found when importing Gears API in GWT
Question
I've created a GWT project using Eclipse which was working perfectly (I was able to run it in both Hosted Mode and on Google App Engine) until I tried to import the Gears API for Google Web Toolkit. After adding the following line to my java source file:
import com.google.gwt.gears.client.geolocation.Geolocation;
I get the following error when I try to compile:
19-Jun-2009 3:36:09 AM com.google.apphosting.utils.jetty.JettyLogger warn
WARNING: failed com.google.apphosting.utils.jetty.DevAppEngineWebAppContext@1c7d682{/,C:\Documents and Settings\Geoff Denning\workspace\TaskPath\war}
javax.xml.parsers.FactoryConfigurationError: Provider org.apache.xerces.jaxp.SAXParserFactoryImpl not found
I've already added the gwt-gears.jar file to my \war\WEB-INF\lib directory, and I've referenced it in Eclipse as follows:
I've even opened the gwt-gears.jar file and confirmed that org/apache/xerces/jaxp/SAXParserFactoryImpl.class does exist. Can anyone give me any pointers as to why I'm getting the above error?
OTHER TIPS
Check that Xerces exists in:
$JAVA_HOME/lib/endorsed
Sounds like a Java 5 issue. Also check the Java system property for:
javax.xml.parsers.SAXParserFactory
It should be:
org.apache.xerces.jaxp.SAXParserFactoryImpl
If not then that's your issue, make sure you set the system property.
This happened to me. I had conflicting JARs in my workspace. I removed one and boom it worked. The message didn't lend very well to the root of the error.
My SAXParserFactoryImpl problem was caused by gwt-gadgets.jar I had in my boot class path. Removing this JAR from the boot class path solved the problem for me. Basically you have to remove any JAR containing a SAXParserFactoryImpl class from your build path (user libs).
Remove the $JAVA_HOME/jre/lib/jaxp.properties fixed the issue.
Take a look at Trouble with Selenium (XercesImpl) and Google App Engine. I had a similar problem with GWT / GAE (SAXParserFactoyImpl not found) and solved it by;
- Importing the jar to war/WEB-INF/lib
- Adding the jar to the build path