RE: ClassCastException in commons logging

[ajack]

I messed around w/ this problem for a few hours, and since it was so painful I can't recall 100% exactly what fixed it. It might be that log4j wasn't loaded for that app [class not found caught & null returned, null giving class cast...], or that a log4j was not configured right [odd, I thought it failed safe, but seems true], or that you needed commons-logging.properties with org.apache.commons.logging.LogFactory=org.apache.commons.logging.impl.Log4jFactory or that a bad commons-logging.jar was shipped in the webapp/WEB-INF/lib directory. My guess would be one of the former, but I pretty much tried all.   Why it happens in one direction I do not know, if it is one server [not two] but I've seen some folk here talk about TC classloader issues that go over my head. If two --- environment.   regards   Adam -----Original Message----- From: Mike Brown [mailto:[EMAIL PROTECTED]] Sent: Thursday, March 21, 2002 3:42 PM To: [EMAIL PROTECTED] Subject: ClassCastException in commons logging I have two applications that are running under tomcat that communicate using methods exposed as axis web services. The service method is identical for each service and looks like:   public void processMessage(String message)   Thus when A wants to communicate with B it invokes B's processMessage service method with a parameter that happens to be an XML formatted string.   This all works good except for one condition ... when A calls B's processMessage method and in that method B calls A's processMessage method, I get the following exception:   java.lang.ClassCastException: org.apache.commons.logging.impl.LogFactoryImpl         at org.apache.commons.logging.LogFactory.newFactory(LogFactory.java:504)         at org.apache.commons.logging.LogFactory.getFactory(LogFactory.java:350)         at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:400)         at org.apache.axis.message.MessageElement.<clinit>(Unknown Source)         at org.apache.axis.client.Call.invoke(Unknown Source)         at org.apache.axis.client.Call.invoke(Unknown Source)         at org.apache.axis.client.Call.invokeOneWay(Unknown Source)   Any ideas???   Mike