[转] log4j-over-slf4j与slf4j-log4j12共存stack overflow异常分析

[From] http://www.tuicool.com/articles/INveIf

 

注：下文中的“桥接”、“转调”、“绑定”等词基本都是同一个概念。

log4j-over-slf4j和slf4j-log4j12是跟java日志系统相关的两个jar包，当它们同时出现在classpath下时，就可能会引起堆栈溢出异常。异常信息大致如下（摘自slf4j官网文档 Detected both log4j-over-slf4j.jar AND slf4j-log4j12.jar on the class path, preempting StackOverflowError ）：

Exception in thread "main" java.lang.StackOverflowError
  at java.util.Hashtable.containsKey(Hashtable.java:306)
  at org.apache.log4j.Log4jLoggerFactory.getLogger(Log4jLoggerFactory.java:36)
  at org.apache.log4j.LogManager.getLogger(LogManager.java:39)
  at org.slf4j.impl.Log4jLoggerFactory.getLogger(Log4jLoggerFactory.java:73)
  at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:249)
  at org.apache.log4j.Category.<init>(Category.java:53)
  at org.apache.log4j.Logger..<init>(Logger.java:35)
  at org.apache.log4j