JDBC/c3p0を使用したMariaDBへの接続

Question

MySQLからMariaDbへの切り替え中です。私はそれがJDBC URLとJDBCドライバを更新するのと同じくらい簡単になることを期待していましたが、残念ながらこれでは十分ではありませんでした。

MariaDbバージョン：5.5.47-MariaDB

設定：

db.driver=org.mariadb.jdbc.Driver 
db.url=jdbc:mysql://localhost:3306/test?characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull&autoReconnect=true 
db.user=user 
db.password=secret 

ドライバ：

<dependency> 
     <groupId>org.mariadb.jdbc</groupId> 
     <artifactId>mariadb-java-client</artifactId> 
     <version>1.4.2</version> 
</dependency> 

C3POの定義、何もここで変更していない、それはMySQLのと同じです：

<bean id="c3p0dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close"> 
    <!-- access --> 
    <property name="driverClass" value="${db.driver}" /> 
    <property name="jdbcUrl" value="${db.url}" /> 
    <property name="user" value="${db.user}" /> 
    <property name="password" value="${db.password}" /> 
    .... 

エラー：

Last acquisition attempt exception: 
java.sql.SQLNonTransientConnectionException: Client does not support authentication protocol requested by server. Consider upgrading MariaDB client. plugin was = 
     at org.mariadb.jdbc.internal.util.ExceptionMapper.get(ExceptionMapper.java:123) 
     at org.mariadb.jdbc.internal.util.ExceptionMapper.throwException(ExceptionMapper.java:69) 
     at org.mariadb.jdbc.Driver.connect(Driver.java:110) 
     at com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:134) 
     at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:182) 
     at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:171) 
     at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:137) 
     at com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1014) 
     at com.mchange.v2.resourcepool.BasicResourcePool.access$800(BasicResourcePool.java:32) 
     at com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask.run(BasicResourcePool.java:1810) 
     at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:547) 
Caused by: org.mariadb.jdbc.internal.util.dao.QueryException: Client does not support authentication protocol requested by server. Consider upgrading MariaDB client. plugin was = 
     at org.mariadb.jdbc.internal.protocol.authentication.DefaultAuthenticationProvider.processAuthPlugin(DefaultAuthenticationProvider.java:94) 
     at org.mariadb.jdbc.internal.protocol.authentication.AuthenticationProviderHolder$1.processAuthPlugin(AuthenticationProviderHolder.java:69) 
     at org.mariadb.jdbc.internal.protocol.AbstractConnectProtocol.authentication(AbstractConnectProtocol.java:490) 
     at org.mariadb.jdbc.internal.protocol.AbstractConnectProtocol.handleConnectionPhases(AbstractConnectProtocol.java:448) 
     at org.mariadb.jdbc.internal.protocol.AbstractConnectProtocol.connect(AbstractConnectProtocol.java:359) 
     at org.mariadb.jdbc.internal.protocol.AbstractConnectProtocol.connectWithoutProxy(AbstractConnectProtocol.java:703) 
     at org.mariadb.jdbc.internal.util.Utils.retrieveProxy(Utils.java:471) 
     at org.mariadb.jdbc.Driver.connect(Driver.java:105) 
     ... 8 more 

私はすでにいくつかのことを試してみましたが、これまでのところ、何も助けない：私は新しいパスワードの形式を使用しようとすると

• がdb.url=jdbc:mariadb://localhost...

をしようとしました：update mysql.user set Password = PASSWORD('secret') where user = 'user'を。

私は次の例外を受け取る：

com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not create connection to database server. Attempted reconnect 3 times. Giving up. 
     at sun.reflect.GeneratedConstructorAccessor47.newInstance(Unknown Source) 
     at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) 
     at java.lang.reflect.Constructor.newInstance(Constructor.java:423) 
     at com.mysql.jdbc.Util.handleNewInstance(Util.java:408) 
     at com.mysql.jdbc.Util.getInstance(Util.java:383) 
     at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1023) 
     at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:997) 
     at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:983) 
     at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:928) 
     at com.mysql.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:2407) 
     at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2328) 
     at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:832) 
     at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46) 
     at sun.reflect.GeneratedConstructorAccessor17.newInstance(Unknown Source) 
     at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) 
     at java.lang.reflect.Constructor.newInstance(Constructor.java:423) 
     at com.mysql.jdbc.Util.handleNewInstance(Util.java:408) 
     at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:417) 
     at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:344) 
     at com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:134) 
     at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:182) 
     at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:171) 
     at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:137) 
     at com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1014) 
     at com.mchange.v2.resourcepool.BasicResourcePool.access$800(BasicResourcePool.java:32) 
     at com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask.run(BasicResourcePool.java:1810) 
     at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:547) 
Caused by: java.sql.SQLException: Unable to load authentication plugin ''. 
     at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:935) 
     at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:932) 
     at com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1769) 
     at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1288) 
     at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2508) 
     at com.mysql.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:2346) 
     ... 17 more 

任意の助けをいただければ幸いです。私は新しいパスワードに更新が機能しなかったことが分かったいくつかの追加試験後

Answer 1

：

MariaDB [test]> SELECT PASSWORD('123456'), OLD_PASSWORD('123456'); 
+--------------------+------------------------+ 
| PASSWORD('123456') | OLD_PASSWORD('123456') | 
+--------------------+------------------------+ 
| 565491d704013245 | 565491d704013245  | 
+--------------------+------------------------+ 

は、私たちが/etc/my.cnfに設定old_passwordsオプションを持っていたが判明します。これをオフにしてMariaDbを再起動すると、新しいPASSWORD()が正しく動作するようになり、今すぐ接続できます。デバッグに苦労している人には便利だと思います。

> SHOW VARIABLES LIKE 'old_passwords'; 
+---------------+-------+ 
| Variable_name | Value | 
+---------------+-------+ 
| old_passwords | 0  | 
+---------------+-------+ 

> SELECT PASSWORD('123456'), OLD_PASSWORD('123456'); 
+-------------------------------------------+------------------------+ 
| PASSWORD('123456')      | OLD_PASSWORD('123456') | 
+-------------------------------------------+------------------------+ 
| *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 | 565491d704013245  | 
+-------------------------------------------+------------------------+