Apache与Tomcat整合，tomcat关闭报错

系统CentOS5.3 64bit.Apache与TOMCAT整合。
apache运行正常。但关闭tomcat时出现错误，
运行 /usr/local/tomcat/bin/shutdown.sh.
提示如下错误：
Using CATALINA_BASE:   /usr/local/tomcat
Using CATALINA_HOME:   /usr/local/tomcat
Using CATALINA_TMPDIR: /usr/local/tomcat/temp
Using JRE_HOME:        /usr/local/jdk1.6.0_20
Using CLASSPATH:       /usr/local/tomcat/bin/bootstrap.jar
Error occurred during initialization of VM
java/lang/ClassFormatError: Invalid pc in LineNumberTable in class file java/lang/Long
但运行 /usr/local/tomcat/bin/startup.sh. 并没有报错，但是tomcat服务并没有启动。
如下：
   Using CATALINA_BASE:   /usr/local/tomcat
Using CATALINA_HOME:   /usr/local/tomcat
Using CATALINA_TMPDIR: /usr/local/tomcat/temp
Using JRE_HOME:        /usr/local/jdk1.6.0_20
Using CLASSPATH:       /usr/local/tomcat/bin/bootstrap.jar
高手帮手解决下.