Web 应用程序 [] 注册了 JDBC 驱动程序 [com.mysql.jdbc.Driver] 但在 Web 应用程序停止时未能取消注册 [英] The web application [] registered the JDBC driver [com.mysql.jdbc.Driver] but failed to unregister it when the web application was stopped

问题描述

我在 stackoverflow 上看到的类似问题很少，但我不知道如何解决我的问题.将 Spring Security 添加到我的 Spring MVC 项目后，我得到以下异常:

I've seen few similar issues on stackoverflow but i could not figure out how i can solve my problem. After adding Spring Security to my Spring MVC project i got following exception:

Jul 20, 2014 3:18:04 PM org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc
SEVERE: The web application [] registered the JDBC driver [com.mysql.jdbc.Driver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.

这是我在 pom.xml

    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.31</version>
    </dependency>

这是我添加的类:

@Component
@Transactional
public class UserDetailsServiceImpl implements UserDetailsService{

@Autowired
private UserDAO userDAO;

@Autowired
private UserAssembler userAssembler;

private static final Logger logger = LoggerFactory.getLogger(UserDetailsServiceImpl.class);

@Transactional(readOnly = true)
public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException, DataAccessException {
    User user = userDAO.findByEmail(username);

    if(null == user) throw new UsernameNotFoundException("User not found");

    return userAssembler.buildUserFromUser(user);
}
}

和汇编程序

 @Service("assembler")

public class UserAssembler {

@Autowired
private UserDAO userDAO;

@Transactional(readOnly = true)
public User buildUserFromUser(net.viralpatel.contact.model.User user) {
    String role = "ROLE_USER";//userEntityDAO.getRoleFromUserEntity(userEntity);

    Collection<GrantedAuthority> authorities = new ArrayList<GrantedAuthority>();
    authorities.add(new GrantedAuthorityImpl(role));

    return new User(user.getLogin(), user.getPassword(), true, true, true, true,  authorities);
}
}

这是我的 spring-security.xml

Here is my spring-security.xml

<beans:bean id="webexpressionHandler" class="org.springframework.security.web.access.expression.DefaultWebSecurityExpressionHandler" />

<http auto-config="true">
    <intercept-url pattern="/account/*" access="ROLE_ADMIN" />
    <form-login login-page="/login" default-target-url="/account/overview" authentication-failure-url="/login?error=true"/>
    <remember-me/>
</http>

<beans:bean id="myUserDetailsService" class="net.viralpatel.contact.service.UserDetailsServiceImpl" />


<authentication-manager alias="authenticationManager">
    <authentication-provider user-service-ref="myUserDetailsService" />
</authentication-manager>

已

INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: /opt/idea-IU-135.909/bin::/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
Jul 20, 2014 3:58:36 PM org.apache.catalina.core.JreMemoryLeakPreventionListener lifecycleEvent
SEVERE: Failed to load class com.mysql.jdbc.NonRegisteringDriver during Tomcat start to prevent possible memory leaks.
java.lang.ClassNotFoundException: com.mysql.jdbc.NonRegisteringDriver

推荐答案

我所做的只是将 mysql-connector-java-5.1.31-bin.jar 放在 $CATALINA_HOME/lib.无需修改 server.xml.

What I did was just to put the mysql-connector-java-5.1.31-bin.jar in $CATALINA_HOME/lib. No modifications to server.xml.

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