Stopping - no more URLs to fetch
Exception in thread "Thread-8523"
Exception: java.lang.OutOfMemoryError thrown from the UncaughtExceptionHandler in thread "Thread-8523"
Exception in thread "main"
Exception: java.lang.OutOfMemoryError thrown from the UncaughtExceptionHandler in thread "main"

查看hadoop日志 并没显示异常

异常啊