服务器mysqltomcat
Servlet.service() for servlet [mvc-dispatcher] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.transaction.CannotCreateTransactionException: Could not open JDBC Connection for transaction; nested exception is java.sql.SQLNonTransientConnectionException: Could not connect to localhost:3308 : Permission denied: connect] with root cause
java.net.SocketException: Permission denied: connect
重装的服务器系统,重新部署的一个tomcat ,里面有3,4个项目,和特定的请求没关系,因为相同请求大部分时候是好的,隔一段时间就会报这个错误。除非重启mysql服务才恢复正常。

The article discusses using MySQL's ALTER TABLE statement to modify tables, including adding/dropping columns, renaming tables/columns, and changing column data types.

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Article discusses strategies for handling large datasets in MySQL, including partitioning, sharding, indexing, and query optimization.

Article discusses popular MySQL GUI tools like MySQL Workbench and phpMyAdmin, comparing their features and suitability for beginners and advanced users.[159 characters]

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Article discusses securing MySQL against SQL injection and brute-force attacks using prepared statements, input validation, and strong password policies.(159 characters)


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