springboot+hikaricp遇到通讯链路故障

Question

使用 Spring Boot 配合 HikariCP 管理 MySQL 连接池时出现以下错误：

2023-08-04 10:43:16.569 [xhx3-pool connection adder] ERROR c.z.h.p.HikariPool  498 createPoolEntry - xhx3-pool - Error thrown while acquiring connection from data source
com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure
 
The last packet successfully received from the server was 5,008 milliseconds ago. The last packet sent successfully to the server was 5,008 milliseconds ago.
    at com.mysql.cj.jdbc.exceptions.SQLError.createCommunicationsException(SQLError.java:174) ~[mysql-connector-java-8.0.25.jar!/:8.0.25]
    at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:64) ~[mysql-connector-java-8.0.25.jar!/:8.0.25]
    at com.mysql.cj.jdbc.ConnectionImpl.isReadOnly(ConnectionImpl.java:1419) ~[mysql-connector-java-8.0.25.jar!/:8.0.25]
    at com.mysql.cj.jdbc.ConnectionImpl.isReadOnly(ConnectionImpl.java:1404) ~[mysql-connector-java-8.0.25.jar!/:8.0.25]
    at com.zaxxer.hikari.pool.PoolBase.setupConnection(PoolBase.java:408) ~[HikariCP-4.0.3.jar!/:?]
    at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:369) ~[HikariCP-4.0.3.jar!/:?]
    at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:206) ~[HikariCP-4.0.3.jar!/:?]
    at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:476) ~[HikariCP-4.0.3.jar!/:?]
    at com.zaxxer.hikari.pool.HikariPool.access$100(HikariPool.java:71) ~[HikariCP-4.0.3.jar!/:?]
    at com.zaxxer.hikari.pool.HikariPool$PoolEntryCreator.call(HikariPool.java:726) ~[HikariCP-4.0.3.jar!/:?]
    at com.zaxxer.hikari.pool.HikariPool$PoolEntryCreator.call(HikariPool.java:712) ~[HikariCP-4.0.3.jar!/:?]
    at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_201]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) ~[?:1.8.0_201]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) ~[?:1.8.0_201]
    at java.lang.Thread.run(Thread.java:748) ~[?:1.8.0_201]
Caused by: com.mysql.cj.exceptions.CJCommunicationsException: Communications link failure
 
The last packet successfully received from the server was 5,008 milliseconds ago. The last packet sent successfully to the server was 5,008 milliseconds ago.
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:1.8.0_201]
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[?:1.8.0_201]
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[?:1.8.0_201]
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[?:1.8.0_201]
    at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61) ~[mysql-connector-java-8.0.25.jar!/:8.0.25]
    at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:105) ~[mysql-connector-java-8.0.25.jar!/:8.0.25]
    at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:151) ~[mysql-connector-java-8.0.25.jar!/:8.0.25]
    at com.mysql.cj.exceptions.ExceptionFactory.createCommunicationsException(ExceptionFactory.java:167) ~[mysql-connector-java-8.0.25.jar!/:8.0.25]
    at com.mysql.cj.protocol.a.NativeProtocol.readMessage(NativeProtocol.java:546) ~[mysql-connector-java-8.0.25.jar!/:8.0.25]
    at com.mysql.cj.protocol.a.NativeProtocol.checkErrorMessage(NativeProtocol.java:710) ~[mysql-connector-java-8.0.25.jar!/:8.0.25]
    at com.mysql.cj.protocol.a.NativeProtocol.sendCommand(NativeProtocol.java:649) ~[mysql-connector-java-8.0.25.jar!/:8.0.25]
    at com.mysql.cj.protocol.a.NativeProtocol.sendCommand(NativeProtocol.java:136) ~[mysql-connector-java-8.0.25.jar!/:8.0.25]
    at com.mysql.cj.NativeSession.sendCommand(NativeSession.java:311) ~[mysql-connector-java-8.0.25.jar!/:8.0.25]
    at com.mysql.cj.NativeSession.queryServerVariable(NativeSession.java:1008) ~[mysql-connector-java-8.0.25.jar!/:8.0.25]
    at com.mysql.cj.jdbc.ConnectionImpl.isReadOnly(ConnectionImpl.java:1411) ~[mysql-connector-java-8.0.25.jar!/:8.0.25]
    ... 12 more
Caused by: java.net.SocketTimeoutException: Read timed out
    at java.net.SocketInputStream.socketRead0(Native Method) ~[?:1.8.0_201]
    at java.net.SocketInputStream.socketRead(SocketInputStream.java:116) ~[?:1.8.0_201]
    at java.net.SocketInputStream.read(SocketInputStream.java:171) ~[?:1.8.0_201]
    at java.net.SocketInputStream.read(SocketInputStream.java:141) ~[?:1.8.0_201]
    at com.mysql.cj.protocol.ReadAheadInputStream.fill(ReadAheadInputStream.java:107) ~[mysql-connector-java-8.0.25.jar!/:8.0.25]
    at com.mysql.cj.protocol.ReadAheadInputStream.readFromUnderlyingStreamIfNecessary(ReadAheadInputStream.java:150) ~[mysql-connector-java-8.0.25.jar!/:8.0.25]
    at com.mysql.cj.protocol.ReadAheadInputStream.read(ReadAheadInputStream.java:180) ~[mysql-connector-java-8.0.25.jar!/:8.0.25]
    at java.io.FilterInputStream.read(FilterInputStream.java:133) ~[?:1.8.0_201]
    at com.mysql.cj.protocol.FullReadInputStream.readFully(FullReadInputStream.java:64) ~[mysql-connector-java-8.0.25.jar!/:8.0.25]
    at com.mysql.cj.protocol.a.SimplePacketReader.readHeader(SimplePacketReader.java:63) ~[mysql-connector-java-8.0.25.jar!/:8.0.25]
    at com.mysql.cj.protocol.a.SimplePacketReader.readHeader(SimplePacketReader.java:45) ~[mysql-connector-java-8.0.25.jar!/:8.0.25]
    at com.mysql.cj.protocol.a.TimeTrackingPacketReader.readHeader(TimeTrackingPacketReader.java:52) ~[mysql-connector-java-8.0.25.jar!/:8.0.25]
    at com.mysql.cj.protocol.a.TimeTrackingPacketReader.readHeader(TimeTrackingPacketReader.java:41) ~[mysql-connector-java-8.0.25.jar!/:8.0.25]
    at com.mysql.cj.protocol.a.MultiPacketReader.readHeader(MultiPacketReader.java:54) ~[mysql-connector-java-8.0.25.jar!/:8.0.25]
    at com.mysql.cj.protocol.a.MultiPacketReader.readHeader(MultiPacketReader.java:44) ~[mysql-connector-java-8.0.25.jar!/:8.0.25]
    at com.mysql.cj.protocol.a.NativeProtocol.readMessage(NativeProtocol.java:540) ~[mysql-connector-java-8.0.25.jar!/:8.0.25]
    at com.mysql.cj.protocol.a.NativeProtocol.checkErrorMessage(NativeProtocol.java:710) ~[mysql-connector-java-8.0.25.jar!/:8.0.25]
    at com.mysql.cj.protocol.a.NativeProtocol.sendCommand(NativeProtocol.java:649) ~[mysql-connector-java-8.0.25.jar!/:8.0.25]
    at com.mysql.cj.protocol.a.NativeProtocol.sendCommand(NativeProtocol.java:136) ~[mysql-connector-java-8.0.25.jar!/:8.0.25]
    at com.mysql.cj.NativeSession.sendCommand(NativeSession.java:311) ~[mysql-connector-java-8.0.25.jar!/:8.0.25]
    at com.mysql.cj.NativeSession.queryServerVariable(NativeSession.java:1008) ~[mysql-connector-java-8.0.25.jar!/:8.0.25]
    at com.mysql.cj.jdbc.ConnectionImpl.isReadOnly(ConnectionImpl.java:1411) ~[mysql-connector-java-8.0.25.jar!/:8.0.25]
    ... 12 more

我的JAR包版本是：

JDK：1.8 springboot：2.5.13 hikaricp:4.0.3 mysql-connector-java：8.0.25 mysql：8.0.25-15

Spring Boot服务的配置如下：

spring:
  application:
    name: XXXX
  datasource:
    xhx3:
      url: jdbc:mysql://XXX:XXXX/ledger3_lns?zeroDateTimeBehavior=convertToNull&useSSL=false&autoReconnect=true&characterEncoding=utf8
      username: XXXX
      password: XXXX
      driver-class-name: com.mysql.cj.jdbc.Driver
      type: com.zaxxer.hikari.HikariDataSource
      hikari:
        pool-name: xhx3-pool
        minimum-idle: 30
        maximum-pool-size: 30
        idle-timeout: 360000
        keepalive-time: 60000
        max-lifetime: 540000
        connection-timeout: 30000
        auto-commit: true
        read-only: true

MySQL服务的wait_timeout配置如下：

+-------------------------------------+----------+
| Variable_name                       | Value    |
+-------------------------------------+----------+
| connect_timeout                     | 10       |
| delayed_insert_timeout              | 300      |
| have_statement_timeout              | YES      |
| innodb_flush_log_at_timeout         | 1        |
| innodb_lock_wait_timeout            | 10       |
| innodb_print_lock_wait_timeout_info | OFF      |
| innodb_rollback_on_timeout          | ON       |
| interactive_timeout                 | 600      |
| lock_wait_timeout                   | 3600     |
| mysqlx_connect_timeout              | 30       |
| mysqlx_idle_worker_thread_timeout   | 60       |
| mysqlx_interactive_timeout          | 28800    |
| mysqlx_port_open_timeout            | 0        |
| mysqlx_read_timeout                 | 30       |
| mysqlx_wait_timeout                 | 28800    |
| mysqlx_write_timeout                | 60       |
| net_read_timeout                    | 30       |
| net_write_timeout                   | 60       |
| rpl_stop_slave_timeout              | 31536000 |
| slave_net_timeout                   | 60       |
| thread_pool_idle_timeout            | 60       |
| wait_timeout                        | 600      |
+-------------------------------------+----------+

以上是我的相关问题。目前，该异常仅以不可预测的方式发生一次。该程序每天早上运行一个批处理任务来查询数据库。数据库的QPS在2000左右，批量SQL查询都是简单的，没有任何写操作。另外，查询涉及连接操作，但它们使用索引，并且仅对一张表执行连接。您能帮我确定问题是出在我的配置还是 SQL 查询中吗？谢谢你。

我尝试修改HikariCP的配置，包括keepalive-time、max-lifetime、idle-timeout，但还是出现异常。