大家帮我看这个报错是什么原因？帮我分析一下吧，谢谢了

[yqx123]

我用的是resin来运行个jsp工程时，启动时出现了这个提示：
其中的这个是为什么呢？
[20:14:12.910] In-place class redefinition (HotSwap) is not available. In-place
class reloading during development requires -Xdebug.


Resin-3.0.8 (built Tue, 08 Jun 2004 02:25:40 PDT)
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Starting Resin on Mon, 06 Dec 2004 20:14:07 +0800 (CST)

[20:14:11.028] Loaded Socket JNI library.
[20:14:11.048] http listening to *:8080
[20:14:11.048] ServletServer[] starting
[20:14:11.088] hmux listening to 127.0.0.1:6802
[20:14:11.599] Host[] starting
[20:14:12.910] In-place class redefinition (HotSwap) is not available. In-place
class reloading during development requires -Xdebug.
[20:14:13.281] Application[http://localhost:8080/resin-doc] starting
[20:14:20.752] Application[http://localhost:8080] starting

[yqx123]

[20:14:12.910] In-place class redefinition (HotSwap) is not available. In-place
class reloading during development requires -Xdebug.
这个是不是说找不到类的位置啊？还是什么原因？

[yqx123]

没有人顶，我自己up一个咯，难道这个问题很简单？