servlet-api 2.5 & jsp-api 2.1 coming under maven dependancies

Question

I'm building a sprint mvc app and getting the following error when I deploy to tomcat:

"at org.apache.jsp.jsp.welcome_jsp._jspInit"

I looked at the possible solutions and it seems that the files "servlet-api" & "jsp-api" are getting polluted.

Reference : java.lang.NullPointerException at org.apache.jsp.index_jsp._jspInit

&&

java.lang.NullPointerException at org.apache.jsp.foo_jsp._jspInit(foo_jsp.java:22).

I went about finding where I'm adding these files. I have not added these files in the lib folder in my webapp and these files do not exist anywhere in the jdk folder that I'm using.

But these files do appear in the build path under maven dependencies. I don't know where maven is getting them from.

My Pom File :

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>KT</groupId>
    <artifactId>KT</artifactId>
    <version>1.0</version>
    <packaging>war</packaging>
    <name>KT Maven Webapp</name>

<properties>
    <org.springframework.version>3.2.3.RELEASE</org.springframework.version>
    <jdk.version>1.6</jdk.version>
</properties>

<dependencies>
    <dependency>
        <groupId>jdk.tools</groupId>
        <artifactId>jdk.tools</artifactId>
        <version>${java.version}</version>
        <scope>system</scope>
        <systemPath>${JAVA_HOME}/lib/tools.jar</systemPath>
    </dependency>
    <dependency>
        <groupId>commons-fileupload</groupId>
        <artifactId>commons-fileupload</artifactId>
        <version>1.2.1</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>${org.springframework.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>${org.springframework.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jdbc</artifactId>
        <version>${org.springframework.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-beans</artifactId>
        <version>${org.springframework.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-tx</artifactId>
        <version>${org.springframework.version}</version>
    </dependency>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>servlet-api</artifactId>
        <version>2.5</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>org.apache.solr</groupId>
        <artifactId>solr-solrj</artifactId>
        <version>4.4.0</version>
    </dependency>
    <dependency>
        <groupId>org.apache.solr</groupId>
        <artifactId>solr-core</artifactId>
        <version>4.4.0</version>
    </dependency>

    <dependency>
        <groupId>org.apache.tika</groupId>
        <artifactId>tika-parsers</artifactId>
        <version>1.4</version>
    </dependency>
</dependencies>
<build>
    <finalName>KT</finalName>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>2.5.1</version>
            <configuration>
                <source>${jdk.version}</source>
                <target>${jdk.version}</target>
            </configuration>
        </plugin>
    </plugins>
</build>

Stack Trace :

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: java.lang.NullPointerException
    org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:527)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:359)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:238)
    org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:263)
    org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1208)
    org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:992)
    org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:939)
    org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
    org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:936)
    org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:827)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
    org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

root cause

java.lang.NullPointerException
    org.apache.jsp.jsp.welcome_jsp._jspInit(welcome_jsp.java:22)
    org.apache.jasper.runtime.HttpJspBase.init(HttpJspBase.java:52)
    org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:159)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:329)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:238)
    org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:263)
    org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1208)
    org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:992)
    org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:939)
    org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
    org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:936)
    org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:827)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
    org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

Welcome_jsp.java :lines 21 to 24

 public void _jspInit() {
    _el_expressionfactory = _jspxFactory.getJspApplicationContext(getServletConfig().getServletContext()).getExpressionFactory();
    _jsp_annotationprocessor = (org.apache.AnnotationProcessor) getServletConfig().getServletContext().getAttribute(org.apache.AnnotationProcessor.class.getName());
  }

I've tried adding/deleting servelet-api and jsp-api and changing their scopes to provided but under all these cases the the files remain under maven dependancis.

I've tried deleting the repository altogether and forcing maven to update the repos.

I'm using sts. I've tried tweaking the project facets and that didn't help either (mainly the servlet settings)

Any help would be greatly appreciated. If you need more info please comment.

paste the full stacktrace.. the root cause would be visible in it — Crickcoder, Oct 18 '13 at 20:50
have you taken a look at your effective pom or dependency tree? (mvn help:effective-pom, mvn dependency:tree) — eis, Oct 18 '13 at 20:50
Pasted the stack trace. Taking a look the dependency tree now — Rahul Shardha, Oct 18 '13 at 20:52
This is most likely issue with jar confliction.Mostly with Tomcat. Try adding this dependency ` javax.servlet.jsp jsp-api 2.1 ` — SRy, Oct 18 '13 at 20:54
I've tried that and also tried that with adding provided >. It didn't work — Rahul Shardha, Oct 18 '13 at 20:55
@eis . I looked at the hierarchy as you said and I see that jsp 2.1 comes under one of my other dependancies (solr-core) but servlet 2.5 doesn't come anywhere. Any thoughts on how to resolve this? — Rahul Shardha, Oct 18 '13 at 20:56
@SRy I tried adding that, deleted the repo and made sts update the project from scratch. The problem persists — Rahul Shardha, Oct 18 '13 at 21:02
@ThePlatypus are they inside the generated .war file? Check that. They shouldn't be. — eis, Oct 18 '13 at 21:04
@SRy that advice is wrong. APIs provided by the container should be in provided scope, not compile. — eis, Oct 18 '13 at 21:06
@ThePlatypus... as I see closely,the issue is coming from particular line in jsp file `welcome_jsp.java:22`. what is there? — SRy, Oct 18 '13 at 21:06
@eis When I do a mvn install I see the files in my lib folder under web app — Rahul Shardha, Oct 18 '13 at 21:14

score 0 · Accepted Answer · answered Jun 10 '14 at 12:46

0

So did two things to resolve the issue:

1) Check the view hierarchy to see if there are conflicting version of the same jar file.

2) If there are conflicting versions, resolve the issue by upgrading/downgrading the jar files to a single version

answered Jun 10 '14 at 12:46

Rahul Shardha

399
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servlet-api 2.5 & jsp-api 2.1 coming under maven dependancies

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