hi guys,
I'm not looking for an answer to a question, I'm just posting this here as a
good place for google to find, as when I encountered this problem the only
decent hit on google was this
forum<http://forums.java.net/jive/message.jspa?messageID=270412>,
and it wasn't very helpful (as neither is this, but maybe it will help
someone somewhere...). However if anyone has any insight as to *why* the
problem causes the observed error, and why the answer fixes the problem,
then I would much appreciate it!!!
The problem is that I recently added a commons library developed internally
to my project. unit tests continued to run fine from the IDE (IDEA 7, I'd
generated the module file from the pom using mvn idea:idea), but running
unit tests from the command line using mvn failed catastrophically with the
below stacktrace, with the totally cryptic
"org.apache.xerces.impl.dv.xs.ListDV$ListData cannot be cast to
[Ljava.lang.Object;" as the error...
here's the dep element for the offending module:
<dependency>
<groupId>au.gov.dha.common</groupId>
<artifactId>common-core</artifactId>
<version>1.2.1-SNAPSHOT</version>
<scope>compile</scop
</dependency>
Obviously the idea that any Java instance can't be cast to a
java.lang.Object is ludicrous, and implies a classloader problem, but thats
bad voodoo and I don't like trying to debug those problems...
playing around with various things I discovered that if I changed the scope
of the dependency to "provided" then the exception magically transformed
into a "java.lang.ClassNotFoundException: org.slf4j.impl.StaticLoggerBinder"
on one of the beans out of the common module. this lead me into an education
of the wonders of the hatred of some apache admins for log4j, their demand
for commons-logging, and the later creation of SLF4J to take some of the
pain out of commons-logging (oh God the pain!).
So now my problem was that although the slf4j-api dependency was
transitively propagated from the common-core module, the slf4j impl
StaticLoggerBinder wasn't, so adding slf4j-jcl as a test-scoped dependency
(deploying to JBoss which already has an impl provided) fixed that, and now
everything happy!!! I still have no idea what caused the original error, any
ideas? eg - why would mvn or perhaps Spring classloaders combine in such a
way that Xerces gets confused?
Java's so easy, I don't know why more people don't do it!
On the plus side, in this whole process I discovered that you can remotely
debug unit tests under mvn, just add the voodoo incantation "
-Dmaven.surefire.debug" to the command line, and attach your favorite IDE
and you can debug through the unit tests as they run under mvn, it's
awesome!!
also, does anyone know how to tell the Sun JVM not to eat the extra lines on
the stacktrace? eg turn "... 48 more" into 48 lines of actual stacktrace?
extra cudos to ClassCastException for not filling in it's stacktrace and
leaving no hint as to what line caused the exception, leaving this humble
developer to have to set breakpoints in it's constructor and sneak a peek at
the stack through the debugger.
hope this isn't Too Long... <http://en.wiktionary.org/wiki/TLDR>
org.springframework.beans.factory.BeanCreationException: Error creating bean
with name 'refListSessionFactory' defined in class path resource
[au/gov/dha/common/reflist/impl/hibernate/reflist-hibernate-beans.xml]:
Invocation of init method failed; nested exception is
org.hibernate.MappingException: Could not parse mapping document in input
stream
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1302)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:463)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:404)
at java.security.AccessController.doPrivileged(Native Method)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:375)
at
org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:263)
at
org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:170)
at
org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:260)
at
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:184)
at
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:163)
at
org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:424)
at
org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:729)
at
org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:381)
at
org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
at
org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:105)
at
au.gov.dha.builder.AbstractSpringBuilder.<init>(AbstractSpringBuilder.java:47)
at au.gov.dha.recon.ReconBuilder.<init>(ReconBuilder.java:48)
at au.gov.dha.recon.excludes.TestUtils.init(TestUtils.java:33)
at
au.gov.dha.recon.ReconBuilderTest.testSpringConfig(ReconBuilderTest.java:40)
Caused by: org.hibernate.MappingException: Could not parse mapping document
in input stream
at
org.hibernate.cfg.AnnotationConfiguration.addInputStream(AnnotationConfiguration.java:735)
at
org.springframework.orm.hibernate3.LocalSessionFactoryBean.buildSessionFactory(LocalSessionFactoryBean.java:633)
at
org.springframework.orm.hibernate3.AbstractSessionFactoryBean.afterPropertiesSet(AbstractSessionFactoryBean.java:211)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1333)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1299)
... 44 more
Caused by: org.dom4j.DocumentException:
org.apache.xerces.impl.dv.xs.ListDV$ListData cannot be cast to
[Ljava.lang.Object; Nested exception:
org.apache.xerces.impl.dv.xs.ListDV$ListData cannot be cast to
[Ljava.lang.Object;
at org.dom4j.io.SAXReader.read(SAXReader.java:484)
at
org.hibernate.cfg.AnnotationConfiguration.addInputStream(AnnotationConfiguration.java:725)
... 48 more
Hidden Classcast Exception munched by SAXReader: (no line numbers... :-( )
at java.lang.ClassCastException.<init>(ClassCastException.java:39)
at
org.apache.xerces.impl.xs.XMLSchemaLoader.processExternalHints(Unknown
Source:-1)
at org.apache.xerces.impl.xs.XMLSchemaValidator.reset(Unknown
Source:-1)
at org.apache.xerces.parsers.BasicParserConfiguration.reset(Unknown
Source:-1)
at org.apache.xerces.parsers.DTDConfiguration.reset(Unknown Source:-1)
at org.apache.xerces.parsers.DTDConfiguration.parse(Unknown Source:-1)
at org.apache.xerces.parsers.DTDConfiguration.parse(Unknown Source:-1)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source:-1)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown
Source:-1)
at org.dom4j.io.SAXReader.read(SAXReader.java:465)
at
org.hibernate.cfg.AnnotationConfiguration.addInputStream(AnnotationConfiguration.java:725)
at
org.springframework.orm.hibernate3.LocalSessionFactoryBean.buildSessionFactory(LocalSessionFactoryBean.java:633)
at
org.springframework.orm.hibernate3.AbstractSessionFactoryBean.afterPropertiesSet(AbstractSessionFactoryBean.java:211)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1,333)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1,299)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:463)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:404)
at
java.security.AccessController.doPrivileged(AccessController.java:-1)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:375)
at
org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:263)
at
org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:170)
at
org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:260)
at
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:184)
at
org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:163)
at
org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:424)
at
org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:729)
at
org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:381)
at
org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
at
org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:105)
at
au.gov.dha.builder.AbstractSpringBuilder.<init>(AbstractSpringBuilder.java:47)
at au.gov.dha.recon.ReconBuilder.<init>(ReconBuilder.java:48)
at au.gov.dha.recon.excludes.TestUtils.init(TestUtils.java:33)
at
au.gov.dha.recon.ReconBuilderTest.testSpringConfig(ReconBuilderTest.java:40)
at
sun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:-1)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at junit.framework.TestCase.runTest(TestCase.java:164)
at junit.framework.TestCase.runBare(TestCase.java:130)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:120)
at junit.framework.TestSuite.runTest(TestSuite.java:230)
at junit.framework.TestSuite.run(TestSuite.java:225)
at
sun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:-1)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
org.apache.maven.surefire.junit.JUnitTestSet.execute(JUnitTestSet.java:213)
at
org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.executeTestSet(AbstractDirectoryTestSuite.java:140)
at
org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.execute(AbstractDirectoryTestSuite.java:127)
at org.apache.maven.surefire.Surefire.run(Surefire.java:177)
at
sun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:-1)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
org.apache.maven.surefire.booter.SurefireBooter.runSuitesInProcess(SurefireBooter.java:345)
at
org.apache.maven.surefire.booter.SurefireBooter.main(SurefireBooter.java:1,009)
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