tomcat切换用户重新启动后报错如下removeGeneratedClassFiles failed

1. Aug 29, 2014 2:14:47 PM org.apache.jasper.compiler.Compiler removeGeneratedClassFiles  
2. WARNING: Failed to delete generated class file [/home/myuser/test/work/Catalina/localhost/_/org/apache/jsp/WEB_INFO/c/common/bossindex_jsp.class]  
3. Aug 29, 2014 2:14:47 PM org.apache.jasper.compiler.Compiler removeGeneratedFiles  
4. WARNING: Failed to delete generated Java file [/home/myuser/test/work/Catalina/localhost/_/org/apache/jsp/WEB_INFO/c/common/bossindex_jsp.java]  
5. Aug 29, 2014 2:14:47 PM org.apache.jasper.compiler.Compiler generateJava  

开始用ROOT启动，后来改为myuser,导致编译后无法正常编译新的class, 页面有时会404 ，有时还是好的！, 用ROOT删除class,再用myuser启动！