java - ThreadContext.pop() 抛出 NoSuchElementException : The ThreadContext stack is empty in log4j-2. 3

Question

我正在尝试从 log4j-1.x 升级到 log4j-2.3 并在运行时出现以下错误。我缺少什么吗？

public void debug(String msg) {
    appendContext();
    logger.debug(msg);
    ThreadContext.pop();
}

[5/25/16 20:08:16:748 SGT] 0000006a ServletWrappe E com.ibm.ws.webcontainer.servlet.ServletWrapper service SRVE0068E: An exception was thrown by one of the service methods of the servlet [MWServlet] in application [DBIN Middleware]. Exception created : [java.util.NoSuchElementException: The ThreadContext stack is empty at org.apache.logging.log4j.spi.DefaultThreadContextStack.pop(DefaultThreadContextStack.java:185) at org.apache.logging.log4j.ThreadContext.pop(ThreadContext.java:391)

Answer 1

我找到了解决方案，我们需要在调用 pop() 之前检查 ThreadContext 是否为空:

public void debug(String msg) {
    appendContext();
    logger.debug(msg);
    if(!ThreadContext.isEmpty()){
        ThreadContext.pop();
    }
}