我有两个 Spring Boot 应用程序连接到两个数据库。第一个是使用“com.ibm.db2.jcc.DB2Driver”驱动程序的云上 DB2。第二个使用其他驱动程序。一年多来，我一直在本地运行这个应用程序，没有出现任何问题。我已经停止使用这些应用程序几个星期了，并在另一个使用“com.ibm.db2.db2jcc4.DB2Driver”且不是 Maven 应用程序的应用程序中工作。我一直在尝试运行我的旧应用程序而不更改配置，现在它们都卡在第一个数据库连接上，直到超时并移动到另一个，连接没有问题。
这里是日志：
2024-07-28 01:26:07.862 DEBUG 53348 --- [ main] com.zaxxer.hikari.HikariConfig : Driver class com.ibm.db2.jcc.DB2Driver found in Thread context class loader jdk.internal.loader.ClassLoaders$AppClassLoader@e42661c8
2024-07-28 01:26:07.908 INFO 53348 --- [ main] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [name: default]
2024-07-28 01:26:07.948 INFO 53348 --- [ main] org.hibernate.Version : HHH000412: Hibernate ORM core version 5.6.15.Final
2024-07-28 01:26:08.083 INFO 53348 --- [ main] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.1.2.Final}
2024-07-28 01:26:08.225 DEBUG 53348 --- [ main] com.zaxxer.hikari.HikariConfig : HikariPool-1 - configuration:
2024-07-28 01:26:08.228 DEBUG 53348 --- [ main] com.zaxxer.hikari.HikariConfig : allowPoolSuspension................................false
2024-07-28 01:26:08.228 DEBUG 53348 --- [ main] com.zaxxer.hikari.HikariConfig : autoCommit................................true
2024-07-28 01:26:08.228 DEBUG 53348 --- [ main] com.zaxxer.hikari.HikariConfig : catalog................................none
2024-07-28 01:26:08.228 DEBUG 53348 --- [ main] com.zaxxer.hikari.HikariConfig : connectionInitSql................................none
2024-07-28 01:26:08.228 DEBUG 53348 --- [ main] com.zaxxer.hikari.HikariConfig : connectionTestQuery................................none
2024-07-28 01:26:08.229 DEBUG 53348 --- [ main] com.zaxxer.hikari.HikariConfig : connectionTimeout................................30000
2024-07-28 01:26:08.229 DEBUG 53348 --- [ main] com.zaxxer.hikari.HikariConfig : dataSource................................none
2024-07-28 01:26:08.229 DEBUG 53348 --- [ main] com.zaxxer.hikari.HikariConfig : dataSourceClassName................................none
2024-07-28 01:26:08.229 DEBUG 53348 --- [ main] com.zaxxer.hikari.HikariConfig : dataSourceJNDI................................none
2024-07-28 01:26:08.229 DEBUG 53348 --- [ main] com.zaxxer.hikari.HikariConfig : dataSourceProperties................................{password=<masked>}
2024-07-28 01:26:08.229 DEBUG 53348 --- [ main] com.zaxxer.hikari.HikariConfig : driverClassName................................"com.ibm.db2.jcc.DB2Driver"
2024-07-28 01:26:08.229 DEBUG 53348 --- [ main] com.zaxxer.hikari.HikariConfig : exceptionOverrideClassName................................none
2024-07-28 01:26:08.230 DEBUG 53348 --- [ main] com.zaxxer.hikari.HikariConfig : healthCheckProperties................................{}
2024-07-28 01:26:08.230 DEBUG 53348 --- [ main] com.zaxxer.hikari.HikariConfig : healthCheckRegistry................................none
2024-07-28 01:26:08.230 DEBUG 53348 --- [ main] com.zaxxer.hikari.HikariConfig : idleTimeout................................600000
2024-07-28 01:26:08.230 DEBUG 53348 --- [ main] com.zaxxer.hikari.HikariConfig : initializationFailTimeout................................1
2024-07-28 01:26:08.230 DEBUG 53348 --- [ main] com.zaxxer.hikari.HikariConfig : isolateInternalQueries................................false
2024-07-28 01:26:08.230 DEBUG 53348 --- [ main] com.zaxxer.hikari.HikariConfig : jdbcUrl................................jdbc:db2://2fc27203-0678-410a-8a5d-ae2eb14c932d.c3n41cmd0nqnrk39u98g.private.databases.appdomain.cloud:32614/bludb:sslConnection=true;sslCertLocation=/Users/kalioofarril/Documents/APCC/DigiCertGlobalRootCA_db2apccdev2_public.crt;
2024-07-28 01:26:08.230 DEBUG 53348 --- [ main] com.zaxxer.hikari.HikariConfig : keepaliveTime................................0
2024-07-28 01:26:08.231 DEBUG 53348 --- [ main] com.zaxxer.hikari.HikariConfig : leakDetectionThreshold................................0
2024-07-28 01:26:08.231 DEBUG 53348 --- [ main] com.zaxxer.hikari.HikariConfig : maxLifetime................................1800000
2024-07-28 01:26:08.231 DEBUG 53348 --- [ main] com.zaxxer.hikari.HikariConfig : maximumPoolSize................................10
2024-07-28 01:26:08.231 DEBUG 53348 --- [ main] com.zaxxer.hikari.HikariConfig : metricRegistry................................none
2024-07-28 01:26:08.231 DEBUG 53348 --- [ main] com.zaxxer.hikari.HikariConfig : metricsTrackerFactory................................none
2024-07-28 01:26:08.231 DEBUG 53348 --- [ main] com.zaxxer.hikari.HikariConfig : minimumIdle................................10
2024-07-28 01:26:08.231 DEBUG 53348 --- [ main] com.zaxxer.hikari.HikariConfig : password................................<masked>
2024-07-28 01:26:08.232 DEBUG 53348 --- [ main] com.zaxxer.hikari.HikariConfig : poolName................................"HikariPool-1"
2024-07-28 01:26:08.232 DEBUG 53348 --- [ main] com.zaxxer.hikari.HikariConfig : readOnly................................false
2024-07-28 01:26:08.232 DEBUG 53348 --- [ main] com.zaxxer.hikari.HikariConfig : registerMbeans................................false
2024-07-28 01:26:08.232 DEBUG 53348 --- [ main] com.zaxxer.hikari.HikariConfig : scheduledExecutor................................none
2024-07-28 01:26:08.232 DEBUG 53348 --- [ main] com.zaxxer.hikari.HikariConfig : schema................................none
2024-07-28 01:26:08.232 DEBUG 53348 --- [ main] com.zaxxer.hikari.HikariConfig : threadFactory................................internal
2024-07-28 01:26:08.232 DEBUG 53348 --- [ main] com.zaxxer.hikari.HikariConfig : transactionIsolation................................default
2024-07-28 01:26:08.232 DEBUG 53348 --- [ main] com.zaxxer.hikari.HikariConfig : username................................"71ccdba8"
2024-07-28 01:26:08.232 DEBUG 53348 --- [ main] com.zaxxer.hikari.HikariConfig : validationTimeout................................5000
2024-07-28 01:26:08.232 INFO 53348 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2024-07-28 01:28:08.682 DEBUG 53348 --- [ main] com.zaxxer.hikari.pool.PoolBase : HikariPool-1 - Failed to create/setup connection: [jcc][t4][2043][11550][4.33.31] Exception java.net.SocketTimeoutException: Error opening socket to server /166.9.59.42 on port 32,614 with message: connect timed out. ERRORCODE=-4499, SQLSTATE=08001
2024-07-28 01:28:08.688 DEBUG 53348 --- [ main] com.zaxxer.hikari.pool.HikariPool : HikariPool-1 - Cannot acquire connection from data source
java.sql.SQLTimeoutException: [jcc][t4][2043][11550][4.33.31] Exception java.net.SocketTimeoutException: Error opening socket to server /166.9.59.42 on port 32,614 with message: connect timed out. ERRORCODE=-4499, SQLSTATE=08001
相同的代码和环境变量在云服务器和我同事的电脑上运行良好。我唯一的提示是一个问题是，尝试通过 db GUI 连接的人正在使用 jcc4 驱动程序，而他的解决方案是更改使用的驱动程序。我认为另一个应用程序以某种方式使 jcc4 驱动程序在我的计算机上的某个端口上运行，该端口可能与我想要使用的 jcc 驱动程序相同，因此干扰了此数据库连接。
这是我能想到的唯一解释，但我不是司机专家，所以也许我完全不同意。
我的 application.properties 文件包含：
apcc.datasource.driver-class-name=com.ibm.db2.jcc.DB2Driver
apcc.datasource.url=jdbc:db2://${APCC_DB_URL}:${APCC_DB_PORT}/${APCC_DB_NAME}:sslConnection=true;sslCertLocation=${APCC_DB_CERT_PATH};
apcc.datasource.username=${APCC_DB_USER}
apcc.datasource.password=${APCC_DB_PASSWORD}
我尝试将 URL 上的 dbs 从 dev 更改为 qa，从云应用程序获取工作 URL。我曾尝试更改 java 版本并删除和创建新版本。
检查应用程序和数据库之间的防火墙。由于您保持端口号不变，因此该端口可能被防火墙阻止并且未开放以接受连接请求。
或者，如果可能的话，考虑更改端口号，然后它应该可以工作。
上述解决方案假设数据库服务器是健康的。