Included Libraries
See Java Endorsed Standards Override Mechanism
Upgrade Issues
org.apache.xml.serializer.ToXMLSAXHandler cannot be cast to org.apache.xml.serializer.SerializationHandler
Caused by: java.io.IOException: org.apache.xml.serializer.ToXMLSAXHandler cannot be cast to org.apache.xml.serializer.SerializationHandler
at com.sun.xml.messaging.saaj.soap.impl.EnvelopeImpl.output(EnvelopeImpl.java:298)
at com.sun.xml.messaging.saaj.soap.impl.EnvelopeImpl.output(EnvelopeImpl.java:309)
at com.sun.xml.messaging.saaj.soap.SOAPPartImpl.getContentAsStream(SOAPPartImpl.java:305)
at com.sun.xml.messaging.saaj.soap.MessageImpl.getHeaderBytes(MessageImpl.java:942)
at com.sun.xml.messaging.saaj.soap.MessageImpl.saveChanges(MessageImpl.java:1093)
... 28 more
The full stack trace was not shown. After debugging the remainder can be printed:
org.apache.xml.serializer.utils.WrappedRuntimeException: org.apache.xml.serializer.ToXMLSAXHandler cannot be cast to org.apache.xml.serializer.SerializationHandler
at org.apache.xml.serializer.SerializerFactory.getSerializer(SerializerFactory.java:177)
at org.apache.xalan.transformer.TransformerIdentityImpl.createResultContentHandler(TransformerIdentityImpl.java:259)
at org.apache.xalan.transformer.TransformerIdentityImpl.transform(TransformerIdentityImpl.java:329)
at com.sun.xml.messaging.saaj.util.transform.EfficientStreamingTransformer.transform(EfficientStreamingTransformer.java:390)
at com.sun.xml.messaging.saaj.soap.impl.EnvelopeImpl.output(EnvelopeImpl.java:296)
at com.sun.xml.messaging.saaj.soap.impl.EnvelopeImpl.output(EnvelopeImpl.java:309)
The casting is done at
cls = ObjectFactory.findProviderClass(className, loader, true);
SerializationHandler sh =
(SerializationHandler) cls.newInstance();
cls.getClassLoader() seems correct.
org.apache.xml.serializer.SerializationHandler.class.getClassLoader() is from another webapp’s class loader.
I’m not sure why.
Thread.currentThread().getContextClassLoader().loadClass("org.apache.xml.serializer.SerializationHandler").getClassLoader()
is from the current webapp’s class loader
One fix is to put Xalan into the endorsed lib path of the jre. For tomcat, this in the jakarta-tomcat-5.5.7/common/endorsed
directory.
Or you can get away with putting it into the shared/lib directory in $CATALINA_BASE.
JVM Properties
OmitStackTraceInFastThrow
You can use -XX:-OmitStackTraceInFastThrow or -XX:+OmitStackTraceInFastThrow on Sun’s JVM. I’m not sure
under what conditions a stack trace does not appear but you could see errors like
java.lang.NullPointerException
at org.springframework.remoting.support.RemoteInvocationUtils.fillInClientStackTraceIfPossible(RemoteInvocationUtils.java:47)
at org.springframework.remoting.support.RemoteInvocationResult.recreate(RemoteInvocationResult.java:115)
IPv4 and IPv6
If you have both IPv4 and IPv6 configured on your o/s and want to use only IPv4, add the following system properties:
-Djava.net.preferIPv4Stack=true (default is false)
-Djava.net.preferIPv6Addresses=false (default is already false)
Annotations
javax.annotation.Resource
This allows the dependency injection container to inject an instance at runtime. Apply this to a field or method.