新部署tomcat，An error occurred at line: [1] index_jsp.java
环境：
centos6.5 32位
oracle jdk 1.8
tomcat 7
问题：
yum install tomcat后，返回如下错误：
[root@centos]~# curl -v http://localhost:8080
* About to connect() to localhost port (#)
* Trying 127.0.0.1... connected
* Connected to localhost (127.0.0.1) port (#)
> GET / HTTP/1.1
> User-Agent: curl/7.19. (i386-redhat-linux-gnu) libcurl/7.19. NSS/3.21 Basic ECC zlib/1.2. libidn/1.18 libssh2/1.4.
> Host: localhost:
> Accept: */*
>
< HTTP/1.1 500 Internal Server Error
< Server: Apache-Coyote/1.1
< Content-Type: text/html;charset=utf-8
< Content-Language: en
< Content-Length: 2655
< Date: Thu, 15 Sep 2016 03:03:16 GMT
< Connection: close
<
<html><head><title>Apache Tomcat/7.0.65 - Error report</title><style><!--H1 {font-family:Tahoma,Arial,sans-serif;color:white;font-size:22px;} H2 {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;font-size:16px;} H3 {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;font-size:14px;} BODY {font-family:Tahoma,Arial,sans-serif;color:black;background-color:white;} B {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;} P {font-family:Tahoma,Arial,sans-serif;background:white;color:black;font-size:12px;}A {color : black;}A.name {color : black;}HR {color : #525D76;}--></style> </head><body><h1>HTTP Status 500 - Unable to compile class for JSP: </h1><HR size="1" noshade="noshade"><p><b>type</b> Exception report</p><p><b>message</b> <u>Unable to compile class for JSP: </u></p><p><b>description</b> <u>The server encountered an internal error that prevented it from fulfilling this request.</u></p><p><b>exception</b> <pre>org.apache.jasper.JasperException: Unable to compile class for JSP:
An error occurred at line: [1] in the generated java file: [/usr/share/tomcat/work/Catalina/localhost/_/org/apache/jsp/index_jsp.java]
The type java.util.Map$Entry cannot be resolved. It is indirectly referenced from required .class files
An error occurred at line: [1] in the generated java file: [/usr/share/tomcat/work/Catalina/localhost/_/org/apache/jsp/index_jsp.java]
The type java.io.ObjectInputStream cannot be resolved. It is indirectly referenced from required .class files
Stacktrace:
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:103)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:366)
org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:466)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:379)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:354)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:341)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:662)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:364)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)
javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
* Closing connection #0
#
网友介绍这是ecj.jar太老了。网友的版本事3.4.2，换4.2后ok。看下自己的ecj
[root@centos]/usr/share/java# ll|grep ecj -rw-r--r-- root root 11月 ecj-3.4..jar lrwxrwxrwx root root 9月 : ecj.jar -> ecj-3.4..jar lrwxrwxrwx root root 9月 : eclipse-ecj-3.4..jar -> ecj-3.4..jar lrwxrwxrwx root root 9月 : eclipse-ecj.jar -> eclipse-ecj-3.4..jar lrwxrwxrwx root root 9月 : jdtcore.jar -> ecj-3.4..jar
果然很老。
那么打开ecj看下， 果然很多编译相关的类啊！
http://wiki.jikexueyuan.com/project/tomcat/classloading.html
用ecj-4.4.2.jar 替换老版本ecj后，重启tomcat，关闭防火墙，访问网页
done
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