多个classloader加载log4j时需要设置当前Thread的classloader为你自己的classloader
Thread.currentThread().setContextClassLoader(classLoader); //for log4j
摘自：org.apache.log4j.helpers.Loader
/**
* If running under JDK 1.2 load the specified class using the
* <code>Thread</code> <code>contextClassLoader</code> if that
* fails try Class.forname. Under JDK 1.1 only Class.forName is
* used.
*
*/
static public Class loadClass (String clazz) throws ClassNotFoundException {
// Just call Class.forName(clazz) if we are running under JDK 1.1
// or if we are instructed to ignore the TCL.
if(java1 || ignoreTCL) {
return Class.forName(clazz);
} else {
try {
return getTCL().loadClass(clazz);
} catch(Throwable e) {
// we reached here because tcl was null or because of a
// security exception, or because clazz could not be loaded...
// In any case we now try one more time
return Class.forName(clazz);
}
}
log4j:ERROR A "org.apache.log4j.DailyRollingFileAppender" object is not assignable to a "org.apache.log4j.Appender" variable. log4j:ERROR The class "org.apache.log4j.Appender" was loaded by log4j:ERROR [[email protected]40] whereas object of type log4j:ERROR "org.apache.log4j.DailyRollingFileAppender" was loaded by [[email protected]]. log4j:ERROR Could not instantiate appender named "main". log4j:ERROR A "org.apache.log4j.ConsoleAppender" object is not assignable to a "org.apache.log4j.Appender" variable. log4j:ERROR The class "org.apache.log4j.Appender" was loaded by log4j:ERROR [[email protected]40] whereas object of type log4j:ERROR "org.apache.log4j.ConsoleAppender" was loaded by [[email protected]]. log4j:ERROR Could not instantiate appender named "console". log4j:WARN No appenders could be found for logger (com.generallycloud.baseio.component.ssl.SSLUtil). log4j:WARN Please initialize the log4j system properly.
原文：http://www.cnblogs.com/gifisan/p/6879465.html
时间： 2024-09-30 20:10:13