我最近将服务器从Debian 7升级到Debian 10，其中包括从MySQL升级到MariaDB。我正在使用tomcat7作为应用程序服务器。我可以登录数据库，所有用户名/密码信息仍然存在，但是通过tomcat进行的领域身份验证未正确进行身份验证。
与升级之前一样，在命令行上使用mysql -u root -p可让我访问所需的数据。 catalina.out日志文件表示无法加载身份验证插件。使用MySQL登录后，我可以看到从tomcat成功登录到数据库。我已经确保mysql / mariadb的jdbc连接器是最新的。
catalina.out：
Sep 07, 2019 5:22:55 PM org.apache.catalina.realm.JDBCRealm authenticate
SEVERE: Exception performing authentication
java.sql.SQLException: Unable to load authentication plugin ''.
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:880)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:876)
at com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1684)
at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1206)
at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2239)
at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2270)
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2069)
at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:794)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:44)
at jdk.internal.reflect.GeneratedConstructorAccessor17.newInstance(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:389)
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:399)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:325)
at org.apache.catalina.realm.JDBCRealm.open(JDBCRealm.java:714)
at org.apache.catalina.realm.JDBCRealm.authenticate(JDBCRealm.java:350)
at org.apache.catalina.authenticator.FormAuthenticator.authenticate(FormAuthenticator.java:281)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:449)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:1025)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:445)
at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:190)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:317)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.base/java.lang.Thread.run(Thread.java:834)
mysql常规日志：
190907 17:22:55 717 Connect root@localhost as anonymous on webserver
718 Connect root@localhost as anonymous on webserver
我希望tomcat像以前一样通过mysql数据库对用户进行身份验证。
谢谢！