關於hadoop與jstl衝突的jar包

剛開始使用spring去寫一個關於hdfs的web項目，使用EL表達式時報以下錯誤：

 

org.apache.jasper.JasperException: Unable to compile class for JSP: 

An error occurred at line: 20 in the jsp file: /WEB-INF/jsp/ls.jsp
The method proprietaryEvaluate(String, Class, PageContext, ProtectedFunctionMapper, boolean) in the type PageContextImpl is not applicable for the arguments (String, Class<String>, PageContext, null)
      <c:forEach var="file" items="${file}">
      <tr>
 			 <td>${file.fileName}</td>
 			 <td>${file.fileSize}</td>		
     </tr>

</c:forEach>

 一個很簡單的EL表達式，可是不能編譯。由於是初學，還覺得代碼錯誤，可是在另外一個頁面測試一個絕對路徑時也出錯，才發現是jar包衝突的緣由。

 

maven  pop.xml 修改以下：

<dependency>
<groupId>org.apache.Hadoop</groupId>
<artifactId>hadoop-client</artifactId>
<version>2.6.0</version>
<exclusions>
<exclusion>
<artifactId>servlet-api</artifactId>
<groupId>javax.servlet</groupId>
</exclusion>
<exclusion>
<artifactId>jetty</artifactId>
<groupId>org.mortbay.jetty</groupId>
</exclusion>
<exclusion>
<artifactId>jetty-util</artifactId>
<groupId>org.mortbay.jetty</groupId>
</exclusion>
<exclusion>
<artifactId>jersey-core</artifactId>
<groupId>com.sun.jersey</groupId>
</exclusion>
<exclusion>
<artifactId>jersey-json</artifactId>
<groupId>com.sun.jersey</groupId>
</exclusion>
<exclusion>
<artifactId>jersey-server</artifactId>
<groupId>com.sun.jersey</groupId>
</exclusion>
</exclusions>
</dependency>


<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-common</artifactId>
<version>2.6.0</version>
<exclusions>
<exclusion>
<artifactId>jsp-2.1</artifactId>
<groupId>org.mortbay.jetty</groupId>
</exclusion>
<exclusion>
<artifactId>jsp-api</artifactId>
<groupId>org.mortbay.jetty</groupId>
</exclusion>
<exclusion>
<artifactId>jetty</artifactId>
<groupId>org.mortbay.jetty</groupId>
</exclusion>
<exclusion>
<artifactId>jetty-util</artifactId>
<groupId>org.mortbay.jetty</groupId>
</exclusion>
<exclusion>
<artifactId>jasper-runtime</artifactId>
<groupId>tomcat</groupId>
</exclusion>
<exclusion>
<artifactId>jasper-compiler</artifactId>
<groupId>tomcat</groupId>
</exclusion>
<exclusion>
<artifactId>commons-cli</artifactId>
<groupId>commons-cli</groupId>
</exclusion>
<exclusion>
<artifactId>jersey-core</artifactId>
<groupId>com.sun.jersey</groupId>
</exclusion>
<exclusion>
<artifactId>jersey-json</artifactId>
<groupId>com.sun.jersey</groupId>
</exclusion>
<exclusion>
<artifactId>jersey-server</artifactId>
<groupId>com.sun.jersey</groupId>
</exclusion>
</exclusions>
</dependency>


<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-hdfs</artifactId>
<version>2.6.0</version>
<exclusions>
<exclusion>
<artifactId>servlet-api</artifactId>
<groupId>javax.servlet</groupId>
</exclusion>
<exclusion>
<artifactId>jetty</artifactId>
<groupId>org.mortbay.jetty</groupId>
</exclusion>
<exclusion>
<artifactId>jetty-util</artifactId>
<groupId>org.mortbay.jetty</groupId>
</exclusion>
<exclusion>
<artifactId>jersey-core</artifactId>
<groupId>com.sun.jersey</groupId>
</exclusion>
<exclusion>
<artifactId>jersey-json</artifactId>
<groupId>com.sun.jersey</groupId>
</exclusion>
<exclusion>
<artifactId>jersey-server</artifactId>
<groupId>com.sun.jersey</groupId>
</exclusion>
   <exclusion>
<artifactId>jasper-runtime</artifactId>
<groupId>tomcat</groupId>
</exclusion>
<exclusion>
<artifactId>jsp-api-2.1</artifactId>
<groupId>org.mortbay.jetty</groupId>
</exclusion>
</exclusions>
</dependency>

 

    網上的一些文章只是去除了 hadoop-common 和hadoop-hdfs中的，最開始我只是按照網上的去去除jar包，可是發現仍是報錯，項目中仍是有衝突的jar包，因而在 dependency hierarchy 中查找依賴，發現hadoop-client中也有。去除後成功。