无法创建PoolableConnectionFactory（未知系统变量“语言”）

Question

Anyone who had troubled with this error?

Cannot create PoolableConnectionFactory (unknown system variable 'language')

Programming with java, mysql, ibatis. Added some codes and existing codes make this error as well.

Below are the error messages.

org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (Unknown system variable 'language')

at org.apache.commons.dbcp.BasicDataSource.createPoolableConnectionFactory(BasicDataSource.java:1549)
at org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1388)
at org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:1044)
at com.ibatis.sqlmap.engine.transaction.jdbc.JdbcTransaction.init(JdbcTransaction.java:48)
at com.ibatis.sqlmap.engine.transaction.jdbc.JdbcTransaction.getConnection(JdbcTransaction.java:89)
at com.ibatis.sqlmap.engine.mapping.statement.GeneralStatement.executeQueryForObject(GeneralStatement.java:104)
at com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.queryForObject(SqlMapExecutorDelegate.java:566)
at com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.queryForObject(SqlMapExecutorDelegate.java:541)
at com.ibatis.sqlmap.engine.impl.SqlMapSessionImpl.queryForObject(SqlMapSessionImpl.java:106)
at com.ibatis.sqlmap.engine.impl.SqlMapClientImpl.queryForObject(SqlMapClientImpl.java:83)
at kes.db.dao.BaseDao.getObject(BaseDao.java:116)
at ocserver.android.service.dao.TB_OC_USER_BADGE_INFO_DAO.confirmNotification(TB_OC_USER_BADGE_INFO_DAO.java:21)
at ocserver.android.service.action.PushNotificationBadgeModAction.requestTEXT(PushNotificationBadgeModAction.java:66)
at kes.controller.TEXTServletAction.requestTEXT(TEXTServletAction.java:82)
at kes.controller.TEXTServletAction.doPost(TEXTServletAction.java:58)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Unknown Source)

And below are my sql statement.

    <select id="select_TB_OC_USER_BADGE_INFO_001" parameterClass="TB_OC_USER_BADGE_INFO_VO" resultClass="TB_OC_USER_BADGE_INFO_VO">
        <![CDATA[
            SELECT
                    BADGE_MC,
                    BADGE_WB
                FROM
                    TB_OC_USER_BADGE_INFO
                WHERE
                    USER_ID = #USER_ID#
                AND
                    COMPANY_CODE = #COMPANY_CODE#
        ]]>
    </select>

Belows are TB_OC_USER_BADGE_INFO_VO. Didn't bring getter and setter.

public class TB_OC_USER_BADGE_INFO_VO {

    private String USER_ID;
    private String COMPANY_CODE;
    private String TYPE;
    private int BADGE_MC;
    private int BADGE_WB; }

Answer 1

The problem was firewall. The firewall had blocked java to access to database on other computer. When permitted the access, my program started working.

Answer 2

I change my java connector library to mysql-connector-java-5.1.23-bin.jar and it works good. This problem was in mysql-connector-java-5.1.36.jar

Answer 3

Are you maybe using the buggy MySQL Connector/J? See:

• https://confluence.atlassian.com/jirakb/unknown-system-variable-language-on-database-setup-page-when-using-mysql-765400069.html
• https://bugs.mysql.com/bug.php?id=77665