TOMCAT报错,求救!!!!

Question

 
SEVERE: Exception looking up UserDatabase under key UserDatabase
javax.naming.NameNotFoundException: Name [UserDatabase] is not bound in this Context. Unable to find [UserDatabase].
at org.apache.naming.NamingContext.lookup(NamingContext.java:820)
at org.apache.naming.NamingContext.lookup(NamingContext.java:168)
at org.apache.catalina.realm.UserDatabaseRealm.startInternal(UserDatabaseRealm.java:255)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
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:150)
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1109)
at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:302)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.StandardService.startInternal(StandardService.java:443)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:732)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.startup.Catalina.start(Catalina.java:684)
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:322)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:456)
Aug 6, 2013 5:50:42 PM org.apache.catalina.realm.CombinedRealm startInternal
SEVERE: Failed to start "org.apache.catalina.realm.UserDatabaseRealm/1.0" realm
org.apache.catalina.LifecycleException: Failed to start component [Realm[UserDatabaseRealm]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
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:150)
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1109)
at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:302)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.StandardService.startInternal(StandardService.java:443)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:732)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.startup.Catalina.start(Catalina.java:684)
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:322)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:456)
Caused by: 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:150)
... 17 more

Answer 1

在Web项目中的META-INF目录下新建一个文件context.xml, 
 
<?xml version='1.0' encoding='utf-8'?>
<Context path="/musicStore">
 
    <Resource 
        name="jdbc/music" 
        auth="Container" 
        maxActive="100" maxIdle="30" maxWait="10000" 
        username="root" password="root" 
        driverClassName="com.mysql.jdbc.Driver" 
        url="jdbc:mysql://localhost:3306/music?autoReconnect=true" 
        logAbandoned="true" 
        removeAbandoned="true" 
        removeAbandonedTimeout="60" 
        type="javax.sql.DataSource" />    <Realm className="org.apache.catalina.realm.DataSourceRealm" debug="99"
        dataSourceName="jdbc/music" localDataSource="true"
        userTable="UserPass" userNameCol="Username" userCredCol="Password"
        userRoleTable="UserRole" roleNameCol="Rolename" /></Context>
不知道 <Realm 这部分是干啥用的

Answer 2

tomcat/conf 下的:
context.xml:<Context>
 
<WatchedResource>WEB-INF/web.xml</WatchedResource>
 
<ResourceLink type="javax.sql.DataSource" name="jdbc/music" global="jdbc/music"/></Context>server.xml:<GlobalNamingResources>
<!-- Editable user database that can also be used by UserDatabaseRealm to authenticate users -->
<Resource validationQuery="SELECT 1" validationInterval="30000" username="root" url="jdbc:mysql://localhost:3306/music" type="javax.sql.DataSource" timeBetweenEvictionRunsMillis="30000" testWhileIdle="true" testOnReturn="false" testOnBorrow="true" removeAbandonedTimeout="60" removeAbandoned="true" password="poiu0000" name="jdbc/music" minIdle="10" minEvictableIdleTimeMillis="30000" maxWait="10000" maxActive="100" logAbandoned="true" jmxEnabled="true" jdbcInterceptors="org.apache.tomcat.jdbc.pool.interceptor.ConnectionState; org.apache.tomcat.jdbc.pool.interceptor.StatementFinalizer" initialSize="10" factory="org.apache.tomcat.jdbc.pool.DataSourceFactory" driverClassName="com.mysql.jdbc.Driver" auth="Container"/></GlobalNamingResources>
<Realm className="org.apache.catalina.realm.LockOutRealm">
<!-- This Realm uses the UserDatabase configured in the global JNDI resources under the key "UserDatabase". Any edits that are performed against this UserDatabase are immediately available for use by the Realm. -->
<Realm className="org.apache.catalina.realm.UserDatabaseRealm" resourceName="UserDatabase"/></Realm>

Answer 3

 几个关于context.xml, server.xml, web.xml的问题：１.文件太乱，用什么编辑比较好读？２.tomcat/conf和自己PROJECT下都有，运行时都被调用吗？３.好象运行时系统会去修改这些文件？
另外，如上错误不影响程序（包括数据库）运行，但WebServices好象走不下去