Hi everybody, I've been workin on deploying our project which developed in ibm websphere into jboss application server. I did the deployment, but when i make a request via jakarta's httpclient-3.0.1 to our servlet i get the following error in my server console 11:12:24,531 ERROR [[MyServlet]] Allocate exception for servlet MyServlet java.lang.ExceptionInInitializerError at org.apache.log4j.PropertyWatchdog.doOnChange(PropertyConfigurator.java:673) at org.apache.log4j.helpers.FileWatchdog.checkAndConfigure(FileWatchdog.java:80) at org.apache.log4j.helpers.FileWatchdog.(FileWatchdog.java:49) at org.apache.log4j.PropertyWatchdog.(PropertyConfigurator.java:665) at org.apache.log4j.PropertyConfigurator.configureAndWatch(PropertyConfigurator.java:373) at system.appcore.MyServlet.init(MyServlet.java:96) at javax.servlet.GenericServlet.init(GenericServlet.java:211) at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1105) at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:757) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:130) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.ja va:175) at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869) at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Htt p11BaseProtocol.java:664) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112) at java.lang.Thread.run(Thread.java:534) Caused by: java.lang.ClassCastException at javax.xml.parsers.DocumentBuilderFactory.newInstance(DocumentBuilderFactory.java:139) at org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:644) at org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:616) at org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:602) at org.apache.log4j.helpers.OptionConverter.selectAndConfigure(OptionConverter.java:460) at org.apache.log4j.LogManager.(LogManager.java:113) and invalid stream header exception on the client side. I thought that this was because of the httpclient that I used, because when I use the ibm V6 app server the response comes in chunkedinputstream but in the jboss case it comes in contentlengthinputstream. And I realized that these are arranged by the httpclient. Then I stop using httpclient and used the general method httpurlconnection. In this case I get the http 500 error which indicates that my server does not work properly. Is this because of the above Allocate exception error?? if anyone encountered this error before, please help me. Thanks a lot.. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3956897#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...