Cann't trace weld-servlet?
I want to see trace level logs about weld. Since Weld use slf4j, I have tested in log4j and logback, both show exception below:
2012-7-20 22:53:51 org.apache.catalina.core.StandardContext listenerStart 严重: Exception sending context initialized event to listener instance of class org.jboss.weld.environment.servlet.Listener java.lang.NullPointerException at org.jboss.weld.interceptor.InterceptorBindingType.unwrap(InterceptorBindingType.java:30) at org.jboss.weld.bean.InterceptorImpl.getInterceptorBindings(InterceptorImpl.java:80) at org.jboss.weld.bean.InterceptorImpl.toString(InterceptorImpl.java:120) at java.text.MessageFormat.subformat(MessageFormat.java:1246) at java.text.MessageFormat.format(MessageFormat.java:836) at java.text.Format.format(Format.java:140) at java.text.MessageFormat.format(MessageFormat.java:812) at ch.qos.cal10n.MessageConveyor.getMessage(MessageConveyor.java:89) at org.jboss.weld.logging.WeldMessageConveyor.getMessage(WeldMessageConveyor.java:66) at org.slf4j.cal10n.LocLogger.trace(LocLogger.java:75) at org.jboss.weld.bean.AbstractBean.initDefaultQualifiers(AbstractBean.java:215) at org.jboss.weld.bean.AbstractBean.initQualifiers(AbstractBean.java:209) at org.jboss.weld.bean.ManagedBean.<init>(ManagedBean.java:281) at org.jboss.weld.bean.InterceptorImpl.<init>(InterceptorImpl.java:63) at org.jboss.weld.bean.InterceptorImpl.of(InterceptorImpl.java:59) at org.jboss.weld.bootstrap.AbstractBeanDeployer.createInterceptor(AbstractBeanDeployer.java:228) at org.jboss.weld.bootstrap.BeanDeployer.createBeans(BeanDeployer.java:137) at org.jboss.weld.bootstrap.BeanDeployment.createBeans(BeanDeployment.java:204) at org.jboss.weld.bootstrap.WeldBootstrap.deployBeans(WeldBootstrap.java:350) at org.jboss.weld.environment.servlet.Listener.contextInitialized(Listener.java:182) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4790) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5284) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1595) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1585) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:662) 2012-7-20 22:53:51 org.apache.catalina.core.StandardContext startInternal 严重: Error listenerStart
I found this problem have something to do with cal10n-api. If use cal10n-api 0.7.2, the exception is what you have seen. If use cal10n-api 0.7.4, log shows other exception:
严重: Exception sending context destroyed event to listener instance of class org.jboss.weld.environment.servlet.Listener java.lang.StringIndexOutOfBoundsException: String index out of range: -1 at java.lang.AbstractStringBuilder.substring(AbstractStringBuilder.java:881) at java.lang.StringBuilder.substring(StringBuilder.java:55) at java.lang.AbstractStringBuilder.subSequence(AbstractStringBuilder.java:858) at java.lang.StringBuilder.subSequence(StringBuilder.java:55) at ch.qos.cal10n.util.LexicalUtil.convertSpecialCharacters(LexicalUtil.java:42) at ch.qos.cal10n.util.TokenStream.tokenizeLine(TokenStream.java:146) at ch.qos.cal10n.util.TokenStream.tokenize(TokenStream.java:67) at ch.qos.cal10n.util.Parser.<init>(Parser.java:56) at ch.qos.cal10n.util.CAL10NResourceBundle.read(CAL10NResourceBundle.java:56) at ch.qos.cal10n.util.CAL10NResourceBundle.<init>(CAL10NResourceBundle.java:50) at ch.qos.cal10n.util.CAL10NResourceBundleFinder.makePropertyResourceBundle(CAL10NResourceBundleFinder.java:83) at ch.qos.cal10n.util.CAL10NResourceBundleFinder.getBundle(CAL10NResourceBundleFinder.java:51) at ch.qos.cal10n.MessageConveyor.lookup(MessageConveyor.java:111) at ch.qos.cal10n.MessageConveyor.getMessage(MessageConveyor.java:77) at org.jboss.weld.logging.WeldMessageConveyor.getMessage(WeldMessageConveyor.java:66) at org.slf4j.cal10n.LocLogger.trace(LocLogger.java:75) at org.jboss.weld.context.AbstractContext.destroy(AbstractContext.java:141) at org.jboss.weld.context.AbstractSharedContext.destroy(AbstractSharedContext.java:64) at org.jboss.weld.context.AbstractSharedContext.invalidate(AbstractSharedContext.java:59) at org.jboss.weld.bootstrap.WeldBootstrap.shutdown(WeldBootstrap.java:464) at org.jboss.weld.environment.servlet.Listener.contextDestroyed(Listener.java:83) at org.apache.catalina.core.StandardContext.listenerStop(StandardContext.java:4830) at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5477) at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:160) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1595) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1585) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:662)
What happened? How can I see trace log?