4

嗨，我在运行线程时遇到异常 NoClassDefFoundError。当我在没有线程的情况下执行时，这个过程运行良好，但是当我执行 start 方法时，我在不同的语句中得到了这个错误

线程是否有可能与主线程有不同的类路径？

感谢编辑添加代码

运行方法：

public void run(){
    try{
        boolean startAction = HeapThread.addAction(idCliente, idThread, Constants.ACTION_CREATE_TOPIC);
        if (!startAction) {
            synchronized (this){
                this.wait();
            }
        }
        createTopic();
    }
    catch(Exception ex){
        log.error("Error", ex);
    }
    finally {
        Long nextIdThread = HeapThread.getNextAction(idCliente, idThread, Constants.ACTION_CREATE_TOPIC);
        if (nextIdThread > 0){
            log.debug("Thread");
            ThreadState thread = HeapThread.getState(nextIdThread);
            synchronized (thread) {
                thread.notify();
            }
        }
    }
}

createTopic() 函数调用 searchBlog() 我称之为

try{
        sessionId = SessionWS.createSession(url, false);
        CrawlerSearch crawler = new CrawlerSearchAPIService(new URL(url + Constants.URL_CRAWLER), new QName(Constants.QNAME_CRAWLER, "CrawlerSearchAPIService")).getCrawlerSearchAPIPort();
        // para cada topico obtnemos 10 blogs
        for (Long idTopic : blogsTopics.keySet()) {

...

完全例外是：

java.lang.NoClassDefFoundError: com/befasoft/common/business/webservices/client/Session
at com.befasoft.common.business.webservices.client.SessionAPIService.getSessionAPIPort(SessionAPIService.java:56)
at com.befasoft.common.business.webservices.SessionWS.createSession(SessionWS.java:21)
at com.humanlike.web.tools.Crawler.searchBlogs(Crawler.java:50)
at com.humanlike.web.theads.CreateTopic.createTopic(CreateTopic.java:164)
at com.humanlike.web.theads.CreateTopic.run(CreateTopic.java:63)
4

2 回答 2

1

Solver，我只需要指定线程类加载器

ct.setContextClassLoader(ClassLoader.getSystemClassLoader());

感谢 Anantha Sharma 指导我

于 2012-10-30T10:50:58.603 回答
1

我的猜测是com.befasoft.common.business.webservices.client.Session以前失败了ExceptionInInitializerError. 这NoClassDefFoundError为后续调用提供了支持。从头开始检查日志。

于 2012-10-30T10:20:15.347 回答