Failure in @ExceptionHandler top.panll.assist.config.GlobalExceptionHandler#exceptionHandler(Exception)

根据提供的引用内容，无法确定具体的问题和上下文。但是可以根据引用内容提供一些可能的解决方案：

1. 检查`RestExceptionHandler`类和`GlobalExceptionHandler`类是否都正确继承了`ResponseEntityExceptionHandler`类，并且是否正确实现了`@ExceptionHandler`注解。

2. 检查`ExceptionMessage`类是否正确实例化，并且是否正确设置了异常信息。

3. 检查`exceptionHandler`方法是否正确处理了`Exception`类型的异常，并且是否正确返回了异常信息。

// 以下是可能的解决方案
// 1. 检查类的继承和注解
public class RestExceptionHandler extends ResponseEntityExceptionHandler {
    @ExceptionHandler(Exception.class)
    public ResponseEntity<Object> handleAllExceptions(Exception ex, WebRequest request) {
        ExceptionMessage exceptionMessageObj = new ExceptionMessage();
        exceptionMessageObj.setErrorMessage(ex.getMessage());        return new ResponseEntity<Object>(exceptionMessageObj, HttpStatus.INTERNAL_SERVER_ERROR);
    }
}

@ControllerAdvice
public class GlobalExceptionHandler extends ResponseEntityExceptionHandler {
    @ExceptionHandler(Exception.class)
    public ResponseEntity<Object> exceptionHandler(Exception ex) {
        ExceptionMessage exceptionMessageObj = new ExceptionMessage();
        exceptionMessageObj.setErrorMessage(ex.getMessage());
        return new ResponseEntity<Object>(exceptionMessageObj, HttpStatus.INTERNAL_SERVER_ERROR);
    }
}

// 2. 检查异常信息的实例化和设置
public class ExceptionMessage {
    private String errorMessage;

    public String getErrorMessage() {
        return errorMessage;
    }

    public void setErrorMessage(String errorMessage) {
        this.errorMessage = errorMessage;
    }
}

// 3. 检查异常处理方法的实现和返回值
public class GlobalExceptionHandler extends ResponseEntityExceptionHandler {
    @ExceptionHandler(Exception.class)
    public ResponseEntity<Object> exceptionHandler(Exception ex) {
        ExceptionMessage exceptionMessageObj = new ExceptionMessage();
        exceptionMessageObj.setErrorMessage(ex.getMessage());
        return new ResponseEntity<Object>(exceptionMessageObj, HttpStatus.INTERNAL_SERVER_ERROR);
    }
}

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