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PONullPointerException in _jspInit
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copied!<p>I got a NullPointerException in the _jspInit function in my jsp page while I access it from the web browser by typing in the address. I search the web and most of them said that this is because in my WEB-INF/lib folder, there is the .jar file jsp-api.jar confilicted with the jar file of the tomcat container like in <a href="https://stackoverflow.com/questions/12199396/java-lang-nullpointerexception-at-org-apache-jsp-page-jsp-jspinit-in-tomcat-6">java.lang.NullPointerException at org.apache.jsp.page_jsp._jspInit in Tomcat 6, but works in Tomcat 7</a>. However, I check the lib folder and find no such jar files. What's the cause and how to fix it? </p> <p>Here's the jsp error page:</p> <pre><code>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:538) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:370) 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) root cause java.lang.NullPointerException org.apache.jsp.index_jsp._jspInit(index_jsp.java:25) org.apache.jasper.runtime.HttpJspBase.init(HttpJspBase.java:52) org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:164) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:340) 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) note The full stack trace of the root cause is available in the Apache Tomcat/6.0.35 logs. </code></pre> <p>Here's my jar file list in the lib directory of my web application in tomcat6:</p> <pre><code>activation-1.1.jar antlr-2.7.6.jar bean-validator.jar c3p0-0.9.1.jar cglib-2.2.jar commons-codec-1.2.jar commons-codec-1.4.jar commons-collections-3.1.jar commons-httpclient-3.1.jar commons-lang-2.4.jar commons-logging.jar commons-logging-1.1.jar cxf-api-2.2.9.jar cxf-common-schemas-2.2.9.jar cxf-common-utilities-2.2.9.jar cxf-rt-bindings-soap-2.2.9.jar cxf-rt-bindings-xml-2.2.9.jar cxf-rt-core-2.2.9.jar cxf-rt-databinding-jaxb-2.2.9.jar cxf-rt-frontend-jaxws-2.2.9.jar cxf-rt-frontend-simple-2.2.9.jar cxf-rt-transports-http-2.2.9.jar cxf-rt-ws-addr-2.2.9.jar cxf-tools-common-2.2.9.jar dom4j-1.6.1.jar ehcache-1.2.3.jar emayclient-v2.jar epcis-captureclient-0.5.0.jar epcis-commons-0.5.0.jar epcis-queryclient-0.5.0.jar geronimo-annotation_1.0_spec-1.1.1.jar geronimo-jaxws_2.1_spec-1.0.jar geronimo-stax-api_1.0_spec-1.0.1.jar geronimo-ws-metadata_2.0_spec-1.1.2.jar hibernate3.jar httpclient-4.1.jar httpcore-4.1.jar httpmime-4.1.jar javassist-3.9.0.GA.jar javax.annotation.jar javax.ejb.jar javax.enterprise.deploy.jar javax.jms.jar javax.management.j2ee.jar javax.persistence.jar javax.resource.jar javax.security.auth.message.jar javax.security.jacc.jar javax.servlet.jar javax.servlet.jsp.jar javax.servlet.jsp.jstl.jar javax.transaction.jar jaxb-api-osgi.jar jaxb-impl-2.2.jar jboss-cache-1.4.1.GA.jar jbosscache-core-3.1.0.GA.jar jdom-2.0.4.jar jsf-api.jar jsf-impl.jar json-20090211.jar jsr311-api.jar jstl-impl.jar jta-1.1.jar junit.jar log4j-1.2.14.jar m4uapi.jar mail.jar mysql-connector-java-5.1.21-bin.jar org.hamcrest.core_1.1.0.v20090501071000.jar oscache-2.1.jar proxool-0.8.3.jar qrgen-1.1.jar saaj-api-1.3.jar saaj-impl-1.3.2.jar slf4j-api-1.5.8.jar slf4j-log4j12-1.5.8.jar stax-api-1.0-2.jar swarmcache-1.0RC2.jar textmagic-sms-api-1.0.jar webservices-api-osgi.jar weld-osgi-bundle.jar wsdl4j-1.6.2.jar wstx-asl-3.2.9.jar xml-resolver-1.2.jar XmlSchema-1.4.5.jar zxing-core-1.7.jar zxing-j2se-1.7.jar </code></pre>

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