好吧，这让我发疯了！！无法解决。
我有一个Spring Boot Rest Web服务，需要运行24/7。我使用连接池（使用hikariCP）连接到mysql。
目前在开发环境中，它每天只运行一次作业。因此，超过23个小时的连接处于空闲状态。
计划的作业运行时，由于某种原因，它在空闲线程上运行，并引发以下异常，即使Hikari在超时阈值之内清楚地显示了其创建的新连接之前，也是如此。
闲置数分钟/小时后，我无法自己重现此情况，只有在延长时间之后才会发生。我已经尝试从其他帖子/网站上的多个建议中遵循设置，但是却无处可寻。希望这是我忽略的简单事情，有人可以帮助我。
谢谢
2018-10-05 23:00:04 DEBUG HikariPool:411 - secondary - Before cleanup stats (total=2, active=1, idle=1, waiting=0)
2018-10-05 23:00:04 DEBUG HikariPool:411 - secondary - After cleanup stats (total=2, active=1, idle=1, waiting=0)
2018-10-05 23:00:04 DEBUG HikariPool:411 - primary - Before cleanup stats (total=2, active=1, idle=1, waiting=0)
2018-10-05 23:00:04 DEBUG HikariPool:411 - primary - After cleanup stats (total=2, active=1, idle=1, waiting=0)
2018-10-05 23:00:13 DEBUG PoolBase:129 - primary - Closing connection com.mysql.jdbc.JDBC4Connection@500889cc: (connection has passed maxLifetime)
2018-10-05 23:00:13 DEBUG HikariPool:709 - primary - Added connection com.mysql.jdbc.JDBC4Connection@2afe5087
2018-10-05 23:00:21 DEBUG OrderedRequestContextFilter:114 - Bound request context to thread: org.apache.catalina.connector.RequestFacade@59f98ac5
2018-10-05 23:00:22 DEBUG HikariPool:709 - secondary - Added connection com.mysql.jdbc.JDBC4Connection@7c42a6a6
2018-10-05 23:00:22 DEBUG PoolBase:129 - secondary - Closing connection com.mysql.jdbc.JDBC4Connection@6add6002: (connection has passed maxLifetime)
2018-10-05 23:00:23 DEBUG DefaultListableBeanFactory:254 - Returning cached instance of singleton bean 'myResource'
2018-10-05 23:00:23 DEBUG DefaultListableBeanFactory:254 - Returning cached instance of singleton bean 'postExecutor'
2018-10-05 23:00:23 DEBUG DefaultListableBeanFactory:254 - Returning cached instance of singleton bean 'myMessageImpl'
2018-10-05 23:00:28 WARN ProxyConnection:153 - secondary - Connection com.mysql.jdbc.JDBC4Connection@f8c1ddd marked as broken because of SQLSTATE(08S01), ErrorCode(0)
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: The last packet successfully received from the server was 44,220,394 milliseconds ago. The last packet sent successfully to the server was 44,220,395 milliseconds ago. is longer than the server configured value of 'wait_timeout'. You should consider either expiring and/or testing connection validity before use in your application, increasing the server configured values for client timeouts, or using the Connector/J connection property 'autoReconnect=true' to avoid this problem.
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:425)
at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:990)
at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:3749)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2512)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2683)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2486)
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1858)
at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1966)
at com.zaxxer.hikari.pool.ProxyPreparedStatement.executeQuery(ProxyPreparedStatement.java:52)
at com.zaxxer.hikari.pool.HikariProxyPreparedStatement.executeQuery(HikariProxyPreparedStatement.java)
at com.jersey.myqueryservice.dao.myMessageImpl.ismyRunning(myMessageImpl.java:61)
at com.jersey.myqueryservice.dao.myMessageImpl$$FastClassBySpringCGLIB$$a8afcfbf.invoke(<generated>)
.....
Caused by: java.net.SocketException: Broken pipe
at java.net.SocketOutputStream.socketWrite0(Native Method)
at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:109)
at java.net.SocketOutputStream.write(SocketOutputStream.java:153)
at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82)
at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140)
at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:3731)
... 80 more
MySQL属性：
mysql> show variables like '%timeout%';
+-----------------------------+----------+
| Variable_name | Value |
+-----------------------------+----------+
| connect_timeout | 10 |
| delayed_insert_timeout | 300 |
| have_statement_timeout | YES |
| innodb_flush_log_at_timeout | 1 |
| innodb_lock_wait_timeout | 50 |
| innodb_rollback_on_timeout | OFF |
| interactive_timeout | 28800 |
| lock_wait_timeout | 31536000 |
| net_read_timeout | 30 |
| net_write_timeout | 60 |
| rpl_stop_slave_timeout | 31536000 |
| slave_net_timeout | 60 |
| wait_timeout | 28800 |
+-----------------------------+----------+
13 rows in set (0.01 sec)
属性：
primary.database.validation-query=SELECT 1
primary.database.max-active=2
primary.database.min-idle=1
primary.database.connection-timeout=14400
primary.database.idle-timeout=14400
primary.database.max-life-time=20000
secondary.database.validation-query=SELECT 1
secondary.database.max-active=5
secondary.database.min-idle=1
secondary.database.connection-timeout=14400
secondary.database.idle-timeout=14400
secondary.database.max-life-time=20000
secondary.database.url=jdbc:mysql://localhost:3306/db?autoReconnect=true
豆类：
@Bean(name = "primaryDatabaseConnection")
public Connection primaryDatabaseConnection() throws SQLException
{
return primaryDataSource().getConnection();
}
@Bean(name = "secondaryDatabaseConnection")
public Connection secondaryDatabaseConnection() throws SQLException
{
return secondaryDataSource().getConnection();
}
@Bean
public DataSource primaryDataSource() {
HikariConfig hikariConfig = new HikariConfig();
hikariConfig.setDriverClassName("com.mysql.jdbc.Driver");
hikariConfig.setJdbcUrl(primaryUrl);
hikariConfig.setUsername(primaryUser);
hikariConfig.setPassword(primaryPassword);
hikariConfig.setMaximumPoolSize(primaryDatabaseMaxActive);
hikariConfig.setMinimumIdle(primaryDatabaseMinIdle);
hikariConfig.setConnectionTimeout(primaryDatabaseConnectionTimeout);
hikariConfig.setMaxLifetime(primaryMaxLifeTime);
hikariConfig.setIdleTimeout(primaryDatabaseIdleTimeout);
hikariConfig.setConnectionTestQuery(primaryDatabaseValidationQuery);
hikariConfig.setPoolName("primary");
HikariDataSource ds = new HikariDataSource(hikariConfig);
return ds;
}
@Bean
public DataSource secondaryDataSource() {
HikariConfig hikariConfig = new HikariConfig();
hikariConfig.setDriverClassName("com.mysql.jdbc.Driver");
hikariConfig.setJdbcUrl(secondaryUrl);
hikariConfig.setUsername(secondaryUser);
hikariConfig.setPassword(secondaryPassword);
hikariConfig.setMaximumPoolSize(secondaryDatabaseMaxActive);
hikariConfig.setMinimumIdle(secondaryDatabaseMinIdle);
hikariConfig.setConnectionTimeout(secondaryDatabaseConnectionTimeout);
hikariConfig.setMaxLifetime(primaryMaxLifeTime);
hikariConfig.setIdleTimeout(secondaryDatabaseIdleTimeout);
hikariConfig.setConnectionTestQuery(secondaryDatabaseValidationQuery);
hikariConfig.setPoolName("secondary");
HikariDataSource ds = new HikariDataSource(hikariConfig);
return ds;
}
存储库：
@Autowired
@Qualifier("secondaryDatabaseConnection")
private Connection conn;
.
.
.
try (
PreparedStatement preparedStatement = conn.prepareStatement(IS_RUNNING_SQL)) {
.
.
.
.
答案 0 :(得分：0)
性能可能会下降。在春季靴子中，我们会给出毫秒数。您可以尝试一下。
spring.datasource.hikari.connection-timeout = 60000
spring.datasource.hikari.maximum-pool-size= 15
spring.datasource.hikari.auto-commit=true
spring.datasource.hikari.max-lifetime=1200000
spring.datasource.hikari.auto-commit=true