Java 将mariaDB客户端与MySQL数据库集成的问题
我正在运行一个java应用程序,使用MySQL作为DB服务器。DB是一个AWS RDS。MySQL连接器是在GNU/GPL下发布的,因此必须用更宽松的方式来替代它。Maria DB客户端声称兼容。但自从使用MariaDB客户端以来,我们在DB密集型活动期间看到以下间歇性问题:Java 将mariaDB客户端与MySQL数据库集成的问题,java,mysql,mariadb,Java,Mysql,Mariadb,我正在运行一个java应用程序,使用MySQL作为DB服务器。DB是一个AWS RDS。MySQL连接器是在GNU/GPL下发布的,因此必须用更宽松的方式来替代它。Maria DB客户端声称兼容。但自从使用MariaDB客户端以来,我们在DB密集型活动期间看到以下间歇性问题: Excption:- SEVERE: Servlet.service() for servlet [dispatcher] in context with path [/Projectname] threw excepti
Excption:-
SEVERE: Servlet.service() for servlet [dispatcher] in context with path [/Projectname] threw exception [Request processing failed; nested exception is org.springframework.transaction.CannotCreateTransactionException: Could not open Hibernate Session for transaction; nested exception is org.hibernate.exception.JDBCConnectionException: Unable to acquire JDBC Connection] with root cause
java.sql.SQLNonTransientConnectionException: (conn=1530488) Connection is closed
at org.mariadb.jdbc.internal.util.exceptions.ExceptionFactory.createException(ExceptionFactory.java:73)
at org.mariadb.jdbc.internal.util.exceptions.ExceptionFactory.create(ExceptionFactory.java:187)
at org.mariadb.jdbc.internal.protocol.AbstractQueryProtocol.cmdPrologue(AbstractQueryProtocol.java:1940)
Caused by: org.hibernate.exception.JDBCConnectionException: Unable to acquire JDBC Connection
at org.hibernate.exception.internal.SQLExceptionTypeDelegate.convert(SQLExceptionTypeDelegate.java:48)
at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:42)
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:113)
Caused by: java.sql.SQLNonTransientConnectionException: Could not connect to address=(host=XXXXXXXXXX)(port=3306)(type=master) : (conn=1530487) could not load system variables
at org.mariadb.jdbc.internal.util.exceptions.ExceptionFactory.createException(ExceptionFactory.java:73)
at org.mariadb.jdbc.internal.util.exceptions.ExceptionFactory.create(ExceptionFactory.java:192)
at org.mariadb.jdbc.internal.protocol.AbstractConnectProtocol.connectWithoutProxy(AbstractConnectProtocol.java:1372)
我已尝试将等待时间
和允许的最大数据包
增加到允许的最大值,但问题仍然存在
版本:-
MySQL-5.7.26
MariaDB connector-2.6.2刚刚遇到了这个问题,找到了答案。在我这方面,这是一个Aurora 1 MySQL数据库(相当于5.6) 根据Diego Dupin在: 因此,您的DB连接字符串可能如下所示: jdbc:mysql://127.0.0.1:3307/mydbname?usePipelineAuth=false&useBatchMultiSend=false 更多详情:
Aurora proxy has a known race condition issue that results in skipping other
queries in proxy buffer. connection might be in hang waiting for query response.
During authentication, socket has a timeout, that will result throwing the error
you describe.
So if `usePipelineAuth` or `useBatchMultiSend` is enable, it might work ... or not.
All pipeline options (`usePipelineAuth` and `useBatchMultiSend`) must be disabled when using aurora.
Problem has been reported to aurora a few times without correction.
Aurora proxy has a known race condition issue that results in skipping other
queries in proxy buffer. connection might be in hang waiting for query response.
During authentication, socket has a timeout, that will result throwing the error
you describe.
So if `usePipelineAuth` or `useBatchMultiSend` is enable, it might work ... or not.
All pipeline options (`usePipelineAuth` and `useBatchMultiSend`) must be disabled when using aurora.
Problem has been reported to aurora a few times without correction.