我目前正在学习更多关于在springbootwebapp中实现jdbc和使用数据库的知识，我遇到了本文底部编写的以下堆栈跟踪。
我创建了一个简单的employee模型，并尝试在main（）所在的同一个类上执行一些数据库代码。模型和主类是整个项目中仅有的两个java文件。我正在尝试实现以下run（）代码，该代码重写接口commandlinerunner中的代码，但是我没有得到应该在log.info（“a部分：”）之后的日志：

log.info("Part A:")
employees.forEach(employee -> {log.info(employee.toString());
        log.info("part a");});

--我注意到：
我注意到，在堆栈跟踪开始之前，日志的最后一行来自：“thread-1”而不是“main”。我认为这意味着一个线程在正常关闭之前遇到了一个错误并关闭了连接。
另外，我认为由于Hikaripole在“peer's close\u notify”之前关闭，我认为这是指Hikaripole的正常关闭，所以我无法看到我一直试图获取的最后一点日志记录。我想看到的最后一点日志记录是已插入到我的数据库中的员工的日志记录。
我想看到的最后一点日志应该从这行代码中获取：

employees.forEach(employee -> {log.info(employee.toString());
        log.info("part a");});

--注意事项：
由于日志中有这一行，我本以为会看到雇员被插入到我的数据库中，但当我直接在mysql命令行客户端上查询时，它返回了一个空集：

2018-11-03 21:08:35.362  INFO 2408 --- [           main] c.j.jdbctest1.JdbcTest1Application       : rows affected: 1

我不明白为什么一行在数据库中没有插入任何内容时会受到影响。
stacktrace和日志：（下面粘贴的stacktrace实际上会重复几次，但为了简洁起见，我把它切掉了。）

2018-11-03 21:08:32.997  INFO 2408 --- [           main] c.j.jdbctest1.JdbcTest1Application       : Starting JdbcTest1Application on KitKat with PID 2408 (C:\Users\Nano\Downloads\jdbc-test1\jdbc-test1\target\classes started by Nano in C:\Users\Nano\Downloads\jdbc-test1\jdbc-test1)
2018-11-03 21:08:33.003  INFO 2408 --- [           main] c.j.jdbctest1.JdbcTest1Application       : No active profile set, falling back to default profiles: default
2018-11-03 21:08:33.770  INFO 2408 --- [           main] c.j.jdbctest1.JdbcTest1Application       : Started JdbcTest1Application in 1.024 seconds (JVM running for 1.778)
2018-11-03 21:08:33.770  INFO 2408 --- [           main] c.j.jdbctest1.JdbcTest1Application       : Creating tables
2018-11-03 21:08:33.770  INFO 2408 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Starting...
2018-11-03 21:08:34.082  INFO 2408 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Start completed.
2018-11-03 21:08:35.135  INFO 2408 --- [           main] c.j.jdbctest1.JdbcTest1Application       : Inserting Baggins Hopkins
2018-11-03 21:08:35.362  INFO 2408 --- [           main] c.j.jdbctest1.JdbcTest1Application       : rows affected: 1
2018-11-03 21:08:35.362  INFO 2408 --- [           main] c.j.jdbctest1.JdbcTest1Application       : Querying for employee
2018-11-03 21:08:36.065  INFO 2408 --- [           main] c.j.jdbctest1.JdbcTest1Application       : Part A:
2018-11-03 21:08:36.065  INFO 2408 --- [       Thread-1] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Shutdown initiated...
Sat Nov 03 21:08:36 KST 2018 WARN: Caught while disconnecting...

EXCEPTION STACK TRACE:

**BEGIN NESTED EXCEPTION**

javax.net.ssl.SSLException
MESSAGE: closing inbound before receiving peer's close_notify

STACKTRACE:

javax.net.ssl.SSLException: closing inbound before receiving peer's close_notify
    at java.base/sun.security.ssl.Alert.createSSLException(Alert.java:129)
    at java.base/sun.security.ssl.Alert.createSSLException(Alert.java:117)
    at java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:308)
    at java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:264)
    at java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:255)
    at java.base/sun.security.ssl.SSLSocketImpl.shutdownInput(SSLSocketImpl.java:645)
    at java.base/sun.security.ssl.SSLSocketImpl.shutdownInput(SSLSocketImpl.java:624)
    at com.mysql.cj.protocol.a.NativeProtocol.quit(NativeProtocol.java:1312)
    at com.mysql.cj.NativeSession.quit(NativeSession.java:182)
    at com.mysql.cj.jdbc.ConnectionImpl.realClose(ConnectionImpl.java:1750)
    at com.mysql.cj.jdbc.ConnectionImpl.close(ConnectionImpl.java:720)
    at com.zaxxer.hikari.pool.PoolBase.quietlyCloseConnection(PoolBase.java:135)
    at com.zaxxer.hikari.pool.HikariPool.lambda$closeConnection$1(HikariPool.java:441)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
    at java.base/java.lang.Thread.run(Thread.java:834)

**END NESTED EXCEPTION**

java代码：

@SpringBootApplication
public class JdbcTest1Application implements CommandLineRunner {
    private static final Logger log = LoggerFactory.getLogger(JdbcTest1Application.class);

    @Autowired
    JdbcTemplate jdbcTemplate;

    public static void main(String[] args) {
        SpringApplication.run(JdbcTest1Application.class, args);
    }

    @Override
    public void run(String... args) throws Exception {
        log.info("Creating tables");

        jdbcTemplate.execute("DROP TABLE IF EXISTS employees");
        jdbcTemplate.execute("CREATE TABLE employees (emp_id int, name varchar(100), role varchar(100), status varchar(100))");

        log.info("Inserting Baggins Hopkins");
        int rowsAffected = jdbcTemplate.update("INSERT INTO EMPLOYEE(EMP_ID, NAME, ROLE, STATUS)"
                + " VALUES(1,'Baggins Hopkins','thief','WORKING')");
        log.info("rows affected: "+ Integer.toString(rowsAffected));
        log.info("Querying for employee");
        String sql = "SELECT emp_id,name,role,status FROM employees";
        List<Employee> employees = jdbcTemplate.query(sql,(rs, rowNum)-> 
        new Employee(rs.getInt("emp_id"), rs.getString("name"),
                rs.getString("role"),Status.valueOf(rs.getString("status"))));
        log.info("Part A:");
        employees.forEach(employee -> {log.info(employee.toString());
            log.info("part a");});

    }
}

为了以防万一，我从application.properties中粘贴了以下代码：

spring.datasource.url=jdbc:mysql://localhost:3306/employee_database
spring.datasource.username=employee
spring.datasource.password=employee
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver