i have about 50k excel rows to insert into my database .
我有大约 50k 行要插入到我的数据库中。 for each row i have to select a number form tableA on this database and increment it ( with an update to the same tableA) and i do this for each row the problem is that some rows works normally but in many times i get this message error :对于每一行，我必须在此数据库上选择一个数字表格 tableA 并增加它（更新同一个 tableA），我对每一行都这样做，问题是某些行正常工作，但很多时候我收到此消息错误：
com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure com.mysql.cj.jdbc.exceptions.CommunicationsException：通信链路故障
The last packet sent successfully to the server was 0 milliseconds ago.最后一个成功发送到服务器的数据包是 0 毫秒前。 The driver has not received any packets from the server.驱动程序没有收到来自服务器的任何数据包。 at com.mysql.cj.jdbc.exceptions.SQLError.createCommunicationsException(SQLError.java:174) at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:64) at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:833) at com.mysql.cj.jdbc.ConnectionImpl.(ConnectionImpl.java:453) at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:246) at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:198) at java.sql/java.sql.DriverManager.getConnection(DriverManager.java:677) at java.sql/java.sql.DriverManager.getConnection(DriverManager.java:228)在 com.mysql.cj.jdbc.exceptions.SQLError.createCommunicationsException(SQLError.java:174) 在 com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:64) 在 com.mysql.cj.jdbc .ConnectionImpl.createNewIO(ConnectionImpl.java:833) 在 com.mysql.cj.jdbc.ConnectionImpl.(ConnectionImpl.java:453) 在 com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:246) 在 com .mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:198) 在 java.sql/java.sql.DriverManager.getConnection(DriverManager.java:677) 在 java.sql/java.sql.DriverManager.getConnection(DriverManager .java:228)
how can i solve this .我该如何解决这个问题。
this is the configuration of connection to database :这是连接到数据库的配置：
url = jdbc:mysql://adress:3306/database?useServerPrepStmts=false&rewriteBatchedStatements=TRUE
driver = com.mysql.cj.jdbc.Driver
