exception - Grails应用程序中的java.lang.ClassCastException

Question

我正在关注免费的在线书籍“Grails入门”(http://www.infoq.com/minibooks/grails-getting-started)，并且在尝试列出任何域类时都遇到了java.lang.ClassCastException。有人可以破译吗？

URI: /RaceTrack/runner/list
Class: java.lang.ClassCastException
Message: sun.proxy.$Proxy26 cannot be cast to org.springframework.orm.hibernate3.HibernateCallback

堆栈跟踪:

    Line | Method
->>   15 | list      in RunnerController.groovy
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
|    186 | doFilter  in PageFragmentCachingFilter.java
|     63 | doFilter  in AbstractFilter.java
|   1145 | runWorker in java.util.concurrent.ThreadPoolExecutor
|    615 | run . . . in java.util.concurrent.ThreadPoolExecutor$Worker
^    722 | run       in java.lang.Thread

附加信息(PageFragmentCachingFilter.java的第186行附近)

183:            if(method == null) {
184:                log.debug("No cacheable method found for {}:{} {}",
185:                        new Object[] { request.getMethod(), request.getRequestURI(), getContext() });
186:                chain.doFilter(request, response);
187:                return;
188:            }
189:            Collection<CacheOperation> cacheOperations = cacheOperationSource.getCacheOperations(

附加信息(AbstractFilter.java的第63行周围):

60:     try {
61:         // NO_FILTER set for RequestDispatcher forwards to avoid double gzipping
62:         if (filterNotDisabled(request)) {
63:             doFilter(request, response, chain);
64:         }
65:         else {
66:             chain.doFilter(req, res);

Answer 1

几天前，我遇到了同样的问题。删除〜/ .grails / 2.0.4 / .slcache /目录可以为我解决。