我有一个基于SOAP的web服务正在Netbeans中实现。我在服务器端有一些问题，它给了我错误500，内部错误，因为我不能自动调试它，它告诉我检查日志，但我的卡特琳娜。Out满是这样的代码:
Aug 20, 2011 11:01:32 PM org.apache.catalina.realm.CombinedRealm startInternal
SEVERE: Failed to start "org.apache.catalina.realm.UserDatabaseRealm/1.0" realm
org.apache.catalina.LifecycleException: No UserDatabase component found under key UserDatabase
at org.apache.catalina.realm.UserDatabaseRealm.startInternal(UserDatabaseRealm.java:264)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
at org.apache.catalina.realm.CombinedRealm.startInternal(CombinedRealm.java:201)
at org.apache.catalina.realm.LockOutRealm.startInternal(LockOutRealm.java:120)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1026)
at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:291)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
at org.apache.catalina.core.StandardService.startInternal(StandardService.java:443)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:727)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
at org.apache.catalina.startup.Catalina.start(Catalina.java:620)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:303)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:431)
Aug 20, 2011 11:01:32 PM org.apache.catalina.startup.HostConfig deployWAR
INFO: Deploying web application archive soap.war
Aug 20, 2011 11:01:33 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory manager
Aug 20, 2011 11:01:34 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory examples
Aug 20, 2011 11:01:35 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory ROOT
Aug 20, 2011 11:01:35 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory host-manager
Aug 20, 2011 11:01:36 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory docs
Aug 20, 2011 11:01:37 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory axis
- Unable to find config file. Creating new servlet engine config file: /WEB-INF/server-config.wsdd
Aug 20, 2011 11:01:39 PM org.apache.coyote.AbstractProtocolHandler start
INFO: Starting ProtocolHandler ["http-bio-8080"]
Aug 20, 2011 11:01:39 PM org.apache.coyote.AbstractProtocolHandler start
INFO: Starting ProtocolHandler ["ajp-bio-8009"]
Aug 20, 2011 11:01:39 PM org.apache.catalina.startup.Catalina start
INFO: Server startup in 7851 ms
基本上都是相同的代码，只有在我启动或关闭Tomcat时才会出现，没有什么有用的，这可能会导致我为什么给我错误500。谁能告诉我是什么原因导致
org.apache.catalina.realm.CombinedRealm startInterna
谢谢你。
这是server.xml的一部分，我修改了它的值，根据我的DB，它的密码等。
<GlobalNamingResources>
<!-- Editable user database that can also be used by
UserDatabaseRealm to authenticate users
-->
<Resource name="NeuroJDBC" auth="Container"
type="javax.sql.Datasource"
driverClassName="com.mysql.jdbc.Driver"
password="alpbra"
maxIdle="2"
maxWait="5000"
removeAbandoned="true"
removedTimeout="60"
username="root"
url="jdbc:mysql://localhost:3306/NeuroDatabase"
description="User database that can be updated and saved"
factory="org.apache.catalina.users.MemoryUserDatabaseFactory"
pathname="conf/tomcat-users.xml" />
</GlobalNamingResources>
在我的情况下，Tomcat未能重新启动并抛出相同的消息。但问题是在POM.xml中，我提到JAVA版本为1.8，代码是在JDK 1.8上编译的。但是在服务器上安装的JDK是1.7。更改版本和创建在JDK1.7上编译的war文件解决了我的问题。希望这能帮助到一些人
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<java.version>1.7</java.version>
</properties>
见此链接http://tomcat.apache.org/tomcat-5.5-doc/config/realm.html(或域文档为您的tomcat版本，如果你不使用tomcat 5)。从堆栈跟踪似乎你有一个配置问题，围绕领域。
stacktrace错误:key UserDatabase下没有UserDatabase组件
在你的$CATALINA_HOME/conf/server.xml中你可以试着修改
吗?<Resource name="NeuroJDBC" auth="Container"
<Resource name="UserDatabase" auth="Container"