這幾天在研究Spring-LDAP，準備應用在項目中。試著調試官網上的一個例子：spring-ldap-person，結果總是在啟動服務器時報錯。

PS：官方的例子我是通過Subversion得到了，地址是https://svn.sourceforge.net/svnroot/springframework/spring-ldap/trunk/spring-ldap-person/

開發環境：Window XP?+?eclipse3.2 + tomcat 5.0.30 + ApacheDS 1.0.0
系統架構：Spring + Spring Webflow + Spring-LDAP
錯誤跟蹤：
2007-06-21 10:10:47,218 ERROR [org.springframework.web.context.ContextLoader] - <Context initialization failed>
org.springframework.beans.factory.BeanCreationExce ption: Error creating bean with name 'serverContext' defined in ServletContext resource [/WEB-INF/apacheDsContext.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationExcepti on: Could not instantiate bean class [javax.naming.InitialContext]: Constructor threw exception; nested exception is org.apache.directory.server.core.interceptor.Inter ceptorException: Failed to initialize interceptor chain. [Root exception is java.lang.NullPointerException]
Caused by:
org.springframework.beans.BeanInstantiationExcepti on: Could not instantiate bean class [javax.naming.InitialContext]: Constructor threw exception; nested exception is org.apache.directory.server.core.interceptor.Inter ceptorException: Failed to initialize interceptor chain. [Root exception is java.lang.NullPointerException]
Caused by:
org.apache.directory.server.core.interceptor.Inter ceptorException: Failed to initialize interceptor chain. [Root exception is java.lang.NullPointerException]
at org.apache.directory.server.core.interceptor.Inter ceptorChain.init(InterceptorChain.java:274)
at org.apache.directory.server.core.DefaultDirectoryS ervice.initialize(DefaultDirectoryService.java:822 )
at org.apache.directory.server.core.DefaultDirectoryS ervice.startup(DefaultDirectoryService.java:229)
at org.apache.directory.server.core.jndi.AbstractCont extFactory.getInitialContext(AbstractContextFactor y.java:117)
at javax.naming.spi.NamingManager.getInitialContext(N amingManager.java:667)
at javax.naming.InitialContext.getDefaultInitCtx(Init ialContext.java:247)
at javax.naming.InitialContext.init(InitialContext.ja va:223)
at javax.naming.InitialContext.<init>(InitialContext. java:197)
at sun.reflect.NativeConstructorAccessorImpl.newInsta nce0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInsta nce(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newI nstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Construc tor.java:494)
at org.springframework.beans.BeanUtils.instantiateCla ss(BeanUtils.java:85)
at org.springframework.beans.factory.support.SimpleIn stantiationStrategy.instantiate(SimpleInstantiatio nStrategy.java:87)
at org.springframework.beans.factory.support.Construc torResolver.autowireConstructor(ConstructorResolve r.java:186)
at org.springframework.beans.factory.support.Abstract AutowireCapableBeanFactory.autowireConstructor(Abs tractAutowireCapableBeanFactory.java:799)
at org.springframework.beans.factory.support.Abstract AutowireCapableBeanFactory.createBeanInstance(Abst ractAutowireCapableBeanFactory.java:717)
at org.springframework.beans.factory.support.Abstract AutowireCapableBeanFactory.createBean(AbstractAuto wireCapableBeanFactory.java:384)
at org.springframework.beans.factory.support.Abstract BeanFactory$1.getObject(AbstractBeanFactory.java:2 51)
at org.springframework.beans.factory.support.DefaultS ingletonBeanRegistry.getSingleton(DefaultSingleton BeanRegistry.java:156)
at org.springframework.beans.factory.support.Abstract BeanFactory.getBean(AbstractBeanFactory.java:248)
at org.springframework.beans.factory.support.Abstract BeanFactory.getBean(AbstractBeanFactory.java:160)
at org.springframework.beans.factory.support.DefaultL istableBeanFactory.preInstantiateSingletons(Defaul tListableBeanFactory.java:287)
at org.springframework.context.support.AbstractApplic ationContext.refresh(AbstractApplicationContext.ja va:352)
at org.springframework.web.context.ContextLoader.crea teWebApplicationContext(ContextLoader.java:244)
at org.springframework.web.context.ContextLoader.init WebApplicationContext(ContextLoader.java:187)
at org.springframework.web.context.ContextLoaderListe ner.contextInitialized(ContextLoaderListener.java: 49)
at org.apache.catalina.core.StandardContext.listenerS tart(StandardContext.java:3831)
at org.apache.catalina.core.StandardContext.start(Sta ndardContext.java:4323)
at org.apache.catalina.core.ContainerBase.addChildInt ernal(ContainerBase.java:823)
at org.apache.catalina.core.ContainerBase.addChild(Co ntainerBase.java:807)
at org.apache.catalina.core.StandardHost.addChild(Sta ndardHost.java:595)
at org.apache.catalina.core.StandardHostDeployer.inst all(StandardHostDeployer.java:277)
at org.apache.catalina.core.StandardHost.install(Stan dardHost.java:832)
at org.apache.catalina.startup.HostConfig.deployDirec tories(HostConfig.java:701)
at org.apache.catalina.startup.HostConfig.deployApps( HostConfig.java:432)
at org.apache.catalina.startup.HostConfig.start(HostC onfig.java:983)
at org.apache.catalina.startup.HostConfig.lifecycleEv ent(HostConfig.java:349)
at org.apache.catalina.util.LifecycleSupport.fireLife cycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.core.ContainerBase.start(Conta inerBase.java:1091)
at org.apache.catalina.core.StandardHost.start(Standa rdHost.java:789)
at org.apache.catalina.core.ContainerBase.start(Conta inerBase.java:1083)
at org.apache.catalina.core.StandardEngine.start(Stan dardEngine.java:478)
at org.apache.catalina.core.StandardService.start(Sta ndardService.java:480)
at org.apache.catalina.core.StandardServer.start(Stan dardServer.java:2313)
at org.apache.catalina.startup.Catalina.start(Catalin a.java:556)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Nativ e Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Native MethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(De legatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.apache.catalina.startup.Bootstrap.start(Bootst rap.java:287)
at org.apache.catalina.startup.Bootstrap.main(Bootstr ap.java:425)
Caused by: java.lang.NullPointerException
at org.apache.directory.server.core.ServerUtils.getAt tribute(ServerUtils.java:54)
at org.apache.directory.server.core.partition.impl.bt ree.LeafEvaluator.evalEquality(LeafEvaluator.java: 301)
at org.apache.directory.server.core.partition.impl.bt ree.LeafEvaluator.evaluate(LeafEvaluator.java:121)
at org.apache.directory.server.core.partition.impl.bt ree.ExpressionEvaluator.evaluate(ExpressionEvaluat or.java:103)
at org.apache.directory.server.core.partition.impl.bt ree.ExpressionEnumerator$2.assertCandidate(Express ionEnumerator.java:257)
at org.apache.directory.server.core.partition.impl.bt ree.IndexAssertionEnumeration.prefetch(IndexAssert ionEnumeration.java:161)
at org.apache.directory.server.core.partition.impl.bt ree.IndexAssertionEnumeration.<init>(IndexAssertio nEnumeration.java:66)
at org.apache.directory.server.core.partition.impl.bt ree.ExpressionEnumerator.enumConj(ExpressionEnumer ator.java:270)
at org.apache.directory.server.core.partition.impl.bt ree.ExpressionEnumerator.enumerate(ExpressionEnume rator.java:134)
at org.apache.directory.server.core.partition.impl.bt ree.DefaultSearchEngine.search(DefaultSearchEngine .java:136)
at org.apache.directory.server.core.partition.impl.bt ree.BTreePartition.search(BTreePartition.java:404)
at org.apache.directory.server.core.partition.Default PartitionNexus.search(DefaultPartitionNexus.java:8 63)
at org.apache.directory.server.core.referral.Referral Service.init(ReferralService.java:175)
at org.apache.directory.server.core.interceptor.Inter ceptorChain.register0(InterceptorChain.java:436)
at org.apache.directory.server.core.interceptor.Inter ceptorChain.register(InterceptorChain.java:395)
at org.apache.directory.server.core.interceptor.Inter ceptorChain.init(InterceptorChain.java:260)
... 51 more

解決方法：
??????? 我求助于Spring官網的論壇，得到了解決的方法。

This is probably caused by the temporary apacheDS data file being corrupt. Try removing the directory Documents and settings\[user]\Local Settings\Temp\ldaptemplate_apacheds

這個錯誤很可能是由于ApacheDS的臨時數據文件遭到了破壞造成的，試著刪除Documents and settings\[user]\Local Settings\Temp\下的ldaptemplate_apacheds文件夾，還有Tomcat的Temp文件夾下的ldaptemplate_apacheds文件和Tomcat的work/Catalina/localhost下的應用文件夾。這樣再啟動tomcat后，ldaptemplate_apacheds文件就會重新生成，問題就解決了。


下面貼出了原稿：http://forum.springframework.org/showthread.php?p=127663&posted=1#post127663

Yesterday, 10:57 AM allen-zhe Junior Member ? Join Date: Jun 2007 Location: Beijing, China Posts: 3 Failed to initialize interceptor chain i got this trouble when i run the spring-ldap-person sample. mine env is window+tomcat. here is the stack: 2007-06-21 10:10:47,218 ERROR [org.springframework.web.context.ContextLoader] - <Context initialization failed> org.springframework.beans.factory.BeanCreationExce ption: Error creating bean with name 'serverContext' defined in ServletContext resource [/WEB-INF/apacheDsContext.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationExcepti on: Could not instantiate bean class [javax.naming.InitialContext]: Constructor threw exception; nested exception is org.apache.directory.server.core.interceptor.Inter ceptorException: Failed to initialize interceptor chain. [Root exception is java.lang.NullPointerException] Caused by: org.springframework.beans.BeanInstantiationExcepti on: Could not instantiate bean class [javax.naming.InitialContext]: Constructor threw exception; nested exception is org.apache.directory.server.core.interceptor.Inter ceptorException: Failed to initialize interceptor chain. [Root exception is java.lang.NullPointerException] Caused by: org.apache.directory.server.core.interceptor.Inter ceptorException: Failed to initialize interceptor chain. [Root exception is java.lang.NullPointerException] at org.apache.directory.server.core.interceptor.Inter ceptorChain.init(InterceptorChain.java:274) at org.apache.directory.server.core.DefaultDirectoryS ervice.initialize(DefaultDirectoryService.java:822 ) at org.apache.directory.server.core.DefaultDirectoryS ervice.startup(DefaultDirectoryService.java:229) at org.apache.directory.server.core.jndi.AbstractCont extFactory.getInitialContext(AbstractContextFactor y.java:117) at javax.naming.spi.NamingManager.getInitialContext(N amingManager.java:667) at javax.naming.InitialContext.getDefaultInitCtx(Init ialContext.java:247) at javax.naming.InitialContext.init(InitialContext.ja va:223) at javax.naming.InitialContext.<init>(InitialContext. java:197) at sun.reflect.NativeConstructorAccessorImpl.newInsta nce0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInsta nce(NativeConstructorAccessorImpl.java:39) at sun.reflect.DelegatingConstructorAccessorImpl.newI nstance(DelegatingConstructorAccessorImpl.java:27) at java.lang.reflect.Constructor.newInstance(Construc tor.java:494) at org.springframework.beans.BeanUtils.instantiateCla ss(BeanUtils.java:85) at org.springframework.beans.factory.support.SimpleIn stantiationStrategy.instantiate(SimpleInstantiatio nStrategy.java:87) at org.springframework.beans.factory.support.Construc torResolver.autowireConstructor(ConstructorResolve r.java:186) at org.springframework.beans.factory.support.Abstract AutowireCapableBeanFactory.autowireConstructor(Abs tractAutowireCapableBeanFactory.java:799) at org.springframework.beans.factory.support.Abstract AutowireCapableBeanFactory.createBeanInstance(Abst ractAutowireCapableBeanFactory.java:717) at org.springframework.beans.factory.support.Abstract AutowireCapableBeanFactory.createBean(AbstractAuto wireCapableBeanFactory.java:384) at org.springframework.beans.factory.support.Abstract BeanFactory$1.getObject(AbstractBeanFactory.java:2 51) at org.springframework.beans.factory.support.DefaultS ingletonBeanRegistry.getSingleton(DefaultSingleton BeanRegistry.java:156) at org.springframework.beans.factory.support.Abstract BeanFactory.getBean(AbstractBeanFactory.java:248) at org.springframework.beans.factory.support.Abstract BeanFactory.getBean(AbstractBeanFactory.java:160) at org.springframework.beans.factory.support.DefaultL istableBeanFactory.preInstantiateSingletons(Defaul tListableBeanFactory.java:287) at org.springframework.context.support.AbstractApplic ationContext.refresh(AbstractApplicationContext.ja va:352) at org.springframework.web.context.ContextLoader.crea teWebApplicationContext(ContextLoader.java:244) at org.springframework.web.context.ContextLoader.init WebApplicationContext(ContextLoader.java:187) at org.springframework.web.context.ContextLoaderListe ner.contextInitialized(ContextLoaderListener.java: 49) at org.apache.catalina.core.StandardContext.listenerS tart(StandardContext.java:3831) at org.apache.catalina.core.StandardContext.start(Sta ndardContext.java:4323) at org.apache.catalina.core.ContainerBase.addChildInt ernal(ContainerBase.java:823) at org.apache.catalina.core.ContainerBase.addChild(Co ntainerBase.java:807) at org.apache.catalina.core.StandardHost.addChild(Sta ndardHost.java:595) at org.apache.catalina.core.StandardHostDeployer.inst all(StandardHostDeployer.java:277) at org.apache.catalina.core.StandardHost.install(Stan dardHost.java:832) at org.apache.catalina.startup.HostConfig.deployDirec tories(HostConfig.java:701) at org.apache.catalina.startup.HostConfig.deployApps( HostConfig.java:432) at org.apache.catalina.startup.HostConfig.start(HostC onfig.java:983) at org.apache.catalina.startup.HostConfig.lifecycleEv ent(HostConfig.java:349) at org.apache.catalina.util.LifecycleSupport.fireLife cycleEvent(LifecycleSupport.java:119) at org.apache.catalina.core.ContainerBase.start(Conta inerBase.java:1091) at org.apache.catalina.core.StandardHost.start(Standa rdHost.java:789) at org.apache.catalina.core.ContainerBase.start(Conta inerBase.java:1083) at org.apache.catalina.core.StandardEngine.start(Stan dardEngine.java:478) at org.apache.catalina.core.StandardService.start(Sta ndardService.java:480) at org.apache.catalina.core.StandardServer.start(Stan dardServer.java:2313) at org.apache.catalina.startup.Catalina.start(Catalin a.java:556) at sun.reflect.NativeMethodAccessorImpl.invoke0(Nativ e Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Native MethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(De legatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at org.apache.catalina.startup.Bootstrap.start(Bootst rap.java:287) at org.apache.catalina.startup.Bootstrap.main(Bootstr ap.java:425) Caused by: java.lang.NullPointerException at org.apache.directory.server.core.ServerUtils.getAt tribute(ServerUtils.java:54) at org.apache.directory.server.core.partition.impl.bt ree.LeafEvaluator.evalEquality(LeafEvaluator.java: 301) at org.apache.directory.server.core.partition.impl.bt ree.LeafEvaluator.evaluate(LeafEvaluator.java:121) at org.apache.directory.server.core.partition.impl.bt ree.ExpressionEvaluator.evaluate(ExpressionEvaluat or.java:103) at org.apache.directory.server.core.partition.impl.bt ree.ExpressionEnumerator$2.assertCandidate(Express ionEnumerator.java:257) at org.apache.directory.server.core.partition.impl.bt ree.IndexAssertionEnumeration.prefetch(IndexAssert ionEnumeration.java:161) at org.apache.directory.server.core.partition.impl.bt ree.IndexAssertionEnumeration.<init>(IndexAssertio nEnumeration.java:66) at org.apache.directory.server.core.partition.impl.bt ree.ExpressionEnumerator.enumConj(ExpressionEnumer ator.java:270) at org.apache.directory.server.core.partition.impl.bt ree.ExpressionEnumerator.enumerate(ExpressionEnume rator.java:134) at org.apache.directory.server.core.partition.impl.bt ree.DefaultSearchEngine.search(DefaultSearchEngine .java:136) at org.apache.directory.server.core.partition.impl.bt ree.BTreePartition.search(BTreePartition.java:404) at org.apache.directory.server.core.partition.Default PartitionNexus.search(DefaultPartitionNexus.java:8 63) at org.apache.directory.server.core.referral.Referral Service.init(ReferralService.java:175) at org.apache.directory.server.core.interceptor.Inter ceptorChain.register0(InterceptorChain.java:436) at org.apache.directory.server.core.interceptor.Inter ceptorChain.register(InterceptorChain.java:395) at org.apache.directory.server.core.interceptor.Inter ceptorChain.init(InterceptorChain.java:260) ... 51 more i need some help! thanks in adv.

? #2 ? ? Yesterday, 04:25 PM rasky Senior Member ? Join Date: Mar 2005 Location: Landskrona, Sweden Posts: 200 This is probably caused by the temporary apacheDS data file being corrupt. Try removing the directory Documents and settings\[user]\Local Settings\Temp\ldaptemplate_apacheds __________________ Mattias Arthursson Jayway AB (www.jayway.se) Spring-LDAP project member ? #3 ? ? Yesterday, 05:49 PM allen-zhe Junior Member ? Join Date: Jun 2007 Location: Beijing, China Posts: 3 thanks for ur advice, Mr. Arthursson. i tryed ur method, but it didn't work! i cleaned my temp files, and restored my ApahceDS, still got this error! got any other advice, Mr. Arthursson? by the way, mine ApacheDS's version is 1.0.0. ulsa Senior Member ? Join Date: Jul 2005 Location: Helsingborg, Sweden Posts: 102 You could also try deleting the ldaptemplate_apacheds directory in Tomcat's temp dir, as well as the ldap-person in Tomcat's work/Catalina/localhost directory. __________________ Ulrik Sandberg Jayway AB (www.jayway.se) Spring-LDAP project member Today, 09:37 AM allen-zhe Junior Member ? Join Date: Jun 2007 Location: Beijing, China Posts: 3 thanks a lot, ulsa! it works now!