Tomcat 服务器异常 - java:comp 未绑定在此上下文中答案

【问题标题】：Tomcat server exception - java:comp is not bound in this ContextTomcat 服务器异常 - java:comp 未绑定在此上下文中
【发布时间】：2010-10-27 21:30:32
【问题描述】：

在做其他事情时，我在我的 lib 文件夹中添加了一个名为 catalina.jar 的 jar。这使我可以提供静态内容（有效），但我以前工作的 struts 操作（通过休眠访问数据库）不再有效。第一个失败迹象出现在tomcat启动时：

SEVERE: Null component Catalina:type=DataSource,path=/,host=localhost,class=javax.sql.DataSource,name="jdbc/UpdatableDB"

在运行访问数据库的操作时会发生后续故障：

ERROR [http-8080-1 14:21:29,789] (DatasourceConnectionProvider) - Could not find datasource: java:comp/env/jdbc/UpdatableDB
javax.naming.NameNotFoundException: Name java:comp is not bound in this Context
        at org.apache.naming.NamingContext.lookup(NamingContext.java:770)
        at org.apache.naming.NamingContext.lookup(NamingContext.java:153)
        at javax.naming.InitialContext.lookup(InitialContext.java:392)
        at org.hibernate.connection.DatasourceConnectionProvider.configure(DatasourceConnectionProvider.java:75)
        at org.hibernate.connection.ConnectionProviderFactory.newConnectionProvider(ConnectionProviderFactory.java:137)
        at org.hibernate.connection.ConnectionProviderFactory.newConnectionProvider(ConnectionProviderFactory.java:79)
        at org.hibernate.cfg.SettingsFactory.createConnectionProvider(SettingsFactory.java:438)
        at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:91)
        at org.hibernate.cfg.Configuration.buildSettingsInternal(Configuration.java:2163)
        at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2159)
        at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1383)
        at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:954)
        at com.util.HibernateUtil.<clinit>(HibernateUtil.java:58)
        at com.offers.CompleteRuleAndTemplateCache.refreshIfNecessary(CompleteRuleAndTemplateCache.java:91)
        at com.offers.CompleteRuleAndTemplateCache.refreshIfNecessary(CompleteRuleAndTemplateCache.java:73)
        at com.offers.CompleteRuleAndTemplateCache.<clinit>(CompleteRuleAndTemplateCache.java:65)
        at com.offers.actions.ShowIframeAction.getApplicableRule(ShowIframeAction.java:541)
        at com.offers.actions.ShowIframeAction.execute(ShowIframeAction.java:121)
        at org.apache.struts.chain.commands.servlet.ExecuteAction.execute(ExecuteAction.java:58)
        at org.apache.struts.chain.commands.AbstractExecuteAction.execute(AbstractExecuteAction.java:67)
        at org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51)
        at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:191)
        at org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:305)
        at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:191)
        at org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283)
        at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
        at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at com.util.SessionFilter.doFilter(SessionFilter.java:78)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:263)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:584)
        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
        at java.lang.Thread.run(Thread.java:619)
Initial SessionFactory creation failed. hibernate-offers.cfg.xml
org.hibernate.HibernateException: Could not find datasource
        at org.hibernate.connection.DatasourceConnectionProvider.configure(DatasourceConnectionProvider.java:79)
        at org.hibernate.connection.ConnectionProviderFactory.newConnectionProvider(ConnectionProviderFactory.java:137)
        at org.hibernate.connection.ConnectionProviderFactory.newConnectionProvider(ConnectionProviderFactory.java:79)
        at org.hibernate.cfg.SettingsFactory.createConnectionProvider(SettingsFactory.java:438)
        at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:91)
        at org.hibernate.cfg.Configuration.buildSettingsInternal(Configuration.java:2163)
        at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2159)
        at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1383)
        at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:954)
        at com.util.HibernateUtil.<clinit>(HibernateUtil.java:58)
        at com.offers.CompleteRuleAndTemplateCache.refreshIfNecessary(CompleteRuleAndTemplateCache.java:91)
        at com.offers.CompleteRuleAndTemplateCache.refreshIfNecessary(CompleteRuleAndTemplateCache.java:73)
        at com.offers.CompleteRuleAndTemplateCache.<clinit>(CompleteRuleAndTemplateCache.java:65)
        at com.offers.actions.ShowIframeAction.getApplicableRule(ShowIframeAction.java:541)
        at com.offers.actions.ShowIframeAction.execute(ShowIframeAction.java:121)
        at org.apache.struts.chain.commands.servlet.ExecuteAction.execute(ExecuteAction.java:58)
        at org.apache.struts.chain.commands.AbstractExecuteAction.execute(AbstractExecuteAction.java:67)
        at org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51)
        at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:191)
        at org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:305)
        at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:191)
        at org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283)
        at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
        at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at com.util.SessionFilter.doFilter(SessionFilter.java:78)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:263)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:584)
        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
        at java.lang.Thread.run(Thread.java:619)
Caused by: javax.naming.NameNotFoundException: Name java:comp is not bound in this Context
        at org.apache.naming.NamingContext.lookup(NamingContext.java:770)
        at org.apache.naming.NamingContext.lookup(NamingContext.java:153)
        at javax.naming.InitialContext.lookup(InitialContext.java:392)
        at org.hibernate.connection.DatasourceConnectionProvider.configure(DatasourceConnectionProvider.java:75)
        ... 41 more

为什么添加 jar 会导致这种情况？我能做些什么（不只是摆脱 catalina.jar）？

我在网上找到的一些建议包括从您的源中删除naming-common.jar、naming-factory.jar 和naming-resources.jar - 但我已经没有这些文件。

应 Jim Garrison 的要求，这里 jdbc/UpdatableDB 绑定到一个 DataSource - 它不在 server.xml 中，它在 context.xml 中，这已经为我们工作了很长时间：

<Resource name="jdbc/UpdatableDB" auth="Container" type="javax.sql.DataSource"
          maxActive="75" maxIdle="40" maxWait="1000"
          removeAbandoned="true" removeAbandonedTimeout="300"
          timeBetweenEvictionRunsMillis="30000"
          defaultAutoCommit="false"
          username="XXXX" password="XXXX" driverClassName="com.mysql.jdbc.Driver"
          url="jdbc:mysql://<HOSTNAME AND PATH>?autoReconnect=true"
          connectionProperties="autoReconnect=true;cachePrepStmts=true;cacheCallableStmts=true;cacheServerConfiguration=true;useLocalSessionState=true;elideSetAutoCommits=true;alwaysSendSetIsolation=false;enableQueryTimeouts=false;"
        />

【问题讨论】：

显示 jdbc/UpdatableDB 绑定到数据源的 server.xml 的相关部分
我不再需要这个问题的答案 - 我摆脱了 catalina.jar（很可能在其他地方重复加载）并使用默认操作来加载静态内容。 IntelliJ 抱怨它找不到默认操作，但我应该忽略它而不是在 Javaland 中进行令人沮丧的漫长跋涉。尽管有警告，它仍然有效。

标签： java hibernate exception tomcat

【解决方案1】：

在 Tomcat 5.5 中，我们使用以下语法来查找 jdbc 资源：

java:/comp/env/jdbc/UpdatableDB

我不确定这是否与您正在使用的相同，但我想我会提及它以防它对其他人有所帮助。

【讨论】：

+1，原始代码在 /comp 之前缺少前导斜杠

【解决方案2】：

即使认为原作者不再需要答案，我也偶然发现了一个类似的问题，并在这里找到了答案JNDI lookup works fine using lookUp but not when used in persistence.xml of JPA 原因是java后面少了一个斜杠，类似下面的位置：

Could not find datasource: java:comp/env/jdbc/UpdatableDB

【讨论】：

【解决方案3】：

您不应该将catalina.jar 添加到您的WEB-INF/lib，因为这是一个特定于容器的jar。这就是您收到该错误的原因。移除jar文件并在eclipse中添加为Target Runtime Tomcat

【讨论】：