java.lang.NoSuchFieldError：调试Maven surefire junit测试时出现NO_FORMAT

Question

When trying to run junit tests from maven (maven surefire plugin) I get the following error:

java.lang.NoSuchFieldError: NO_FORMAT

This error seems to come from any call to my log4j logger. So when I have a class with a log4j class variable log , like:

public class SomeClass {

    private Logger log = Logger.getLogger(SomeClass.class);

    ....
}

then a call to

log.info(String msg);

results in the above error. I tried to make sure that the basic configuration is setup when running the junit tests, such as

@Before
public void setup() {
    BasicConfigurator.configure();
    someclass = new SomeClass();
}

but that does not solve this problem. Removing all the log calls solves the problem, but that is not a very nice solution.

Any idea why this problem occur? Many thanks.

Answer 1

尝试升级/降级您的log4j依赖项。

Answer 2

我不确定这是否有帮助，但是我将尝试检查是否在类路径中有多个Log4j依赖项，即我将运行mvn dependency:tree并可能将其输出到临时文件，例如mvn dependency:tree > deps.txt然后分析我的依赖关系。

Answer 3

To me the problem was that I had activated an arquillian profile as well. Make sure you only activate the right one to run the maven tests :-)