resin.config问题！！！高分跪求！！！！急！急！急！急！急！急！

[nnsong]

1 resin.config设置自动重起还有版本限制吗，httpd.exe中有一个信息提示:<ping> is only available in Resin Professional


2下面的信息是什么原因？？

[10:20:23.772] http listening to *:8181
[10:20:23.772] ServletServer[] starting
[10:20:23.774] hmux listening to rzx230:6802
[10:20:24.091] Host[] starting
[10:20:24.998] In-place class redefinition (HotSwap) is not available.
[10:20:24.998] java.lang.UnsatisfiedLinkError: no resin in java.library.path
[10:20:25.041] Compiling com/caucho/doc/JavadocRedirectServlet.java
java.lang.ClassNotFoundException: com.sun.tools.javac.Main
at java.net.URLClassLoader$1.run(URLClassLoader.java:199)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:187)
at java.lang.ClassLoader.loadClass(ClassLoader.java:289)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:274)
at java.lang.ClassLoader.loadClass(ClassLoader.java:235)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:302)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:219)
at com.caucho.java.InternalCompiler.compileInt(InternalCompiler.java:82)
at com.caucho.java.AbstractJavaCompiler.run(AbstractJavaCompiler.java:115)
at java.lang.Thread.run(Thread.java:534)
[10:20:25.052] com.caucho.config.LineConfigException: Resin can't load com.sun.tools.javac.Main. Usually this means that the JDK tools.jar is missing from the classpath, possibly because of using a JRE instead of the JDK. You can either add tools.jar to the classpath or change the compiler to an external one with <java compiler='javac'/> or jikes.
[10:20:25.052]
[10:20:25.052] java.lang.ClassNotFoundException: com.sun.tools.javac.Main
[10:20:25.122] Application[http://localhost:8181] starting

执行./httpd.sh后执行到此就没有反映了。。

[nnsong]

我用的resin版本是resin-3.0.13

[nnsong]

Host[] stopping
WebApp[http://localhost:8181] stopping
Server[] stopping
Server[] starting
http:listening to *:8181
hmux listening to chinaomr:6802
Host[] starting
WebApp[http://localhost:8181] starting

这个出现意味着resin自动重起成功了吗？？

同时有这个情况出现:
In-place class redefinition (HotSwap) is not available. In-place
class reloading during development requires a compatible JDK and -Xdebug


为什么？影响我的使用吗？怎么改动？谢谢大侠们了！！！！！！！！