java.lang.NoSuchFieldError：INSTANCE

225

苛刻的Moorjani：

尝试通过StormSubmitter提交拓扑时，我得到-

Caused by: java.lang.NoSuchFieldError: INSTANCE  
at org.apache.http.impl.io.DefaultHttpRequestWriterFactory.<init>(DefaultHttpRequestWriterFactory.java:52)

我正在使用Spring。

我没有在Spout / Bolt构造函数中初始化HttpClient。相反，它是在prepare()bolt方法中从Spring Context获取的类的构造函数中初始化的

代码的结构如下-

SomeBolt.java

@Component
public class SomeBolt extends BaseRichBolt {
    private OutputCollector _collector;
    private SomeClient someClient;

    @Override
    public void prepare(Map conf, TopologyContext context, OutputCollector collector) {
        _collector = collector;
        someClient = AppContext.getBean(SomeClient.class);
    }
}

SomeClient.java

@Component
public class SomeClient {
    private final CloseableHttpClient httpClient;

    public SomeClient() {
        this.httpClient = (httpClient == null ? HttpClients.createDefault() : httpClient);
    }
}

AppContext.java

@Component
public class AppContext implements ApplicationContextAware {

    private static ApplicationContext applicationContext;

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        AppContext.applicationContext = applicationContext;
    }

    public static <T> T getBean(Class<T> c) {
        return applicationContext.getBean(c);
    }
}

KC：

这可能是依赖性问题。

这是一条非常不清楚的错误消息，但是我在这里找到了类似的内容：Hibernate NoSuchFieldError INSTANCE但仅适用于Struts 1？

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