JBWEB000236: servlet jsp抛出异常的Servlet.service()：java.lang.NullPointerException: value is null
JBWEB000236: servlet jsp抛出异常的Servlet.service()：java.lang.NullPointerException: value is null
提问于 2014-01-20 14:43:35
您好，我是JBoss新手，正在尝试在JBoss EAP 6中部署我的web应用程序。部署成功，在尝试访问应用程序时，我得到了以下异常。我使用logback和slf4j来登录我的应用程序。有人能帮我找到解决这个问题的办法吗
12:04:12,846 INFO [org.jboss.as] (Controller Boot Thread) JBAS015874: JBoss EAP 6.2.0.GA (AS 7.3.0.Final-redhat-14) started in 37270ms - Started 185 of 245 services (59 services are passive or on-demand)
12:19:32,799 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[default-host].[/SynergyClient].[jsp]] (http-/127.0.0.1:9090-1) JBWEB000236: Servlet.service() for servlet jsp threw exception: java.lang.NullPointerException: value is null
at org.jboss.logmanager.MDC.put(MDC.java:58) [jboss-logmanager-1.5.1.Final-redhat-1.jar:1.5.1.Final-redhat-1]
at org.slf4j.impl.Slf4jMDCAdapter.put(Slf4jMDCAdapter.java:32)
at org.slf4j.MDC.put(MDC.java:116) [slf4j-api-1.7.2.redhat-2.jar:1.7.2.redhat-2]
at ch.qos.logback.classic.helpers.MDCInsertingServletFilter.insertIntoMDC(MDCInsertingServletFilter.java:70) [logback-classic-1.0.13.jar:]
at ch.qos.logback.classic.helpers.MDCInsertingServletFilter.doFilter(MDCInsertingServletFilter.java:49) [logback-classic-1.0.13.jar:]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:149) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:169) [jboss-as-web-7.3.0.Final-redhat-14.jar:7.3.0.Final-redhat-14]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:145) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:97) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:102) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:336) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:653) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:920) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1]
at java.lang.Thread.run(Thread.java:722) [rt.jar:1.7.0_09]回答 1
Stack Overflow用户
发布于 2014-01-20 14:48:18
java.lang.NullPointerException:值为空
这是一个非常简单的例外。我的建议是逐个调试传递给JSP的值。
您的变量value将作为null传递。检查参数的名称是否匹配，以及正确的参数变量是否存在适当的getter/getter
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/21227749
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