我正在尝试设置liquibase，以便基于aws-rds-aurora-mysql为一个项目同步我的dev和prod数据库。不幸的是，我无法将liquibase连接到我的aws aurora mysql数据库。
我做了什么？
液化气
跟随文章https://docs.aws.amazon.com/amazonrds/latest/aurorauserguide/aurora.connecting.html 说明了如何通过jdbc连接到aws-rds-aurora-mysql数据库集群。
我下载了mariadbjdbc连接器
我用附录1中的数据配置了liquibase.properties文件
我运行了命令'liquibase--driver=org.mariadb.jdbc.driver--classpath=<path\u to\u jar>mariadb-java-client-2.7.1.jar generatechangelog``
liquibase按预期启动并尝试连接到数据库prod集群，但随后挂起一段时间，然后终止，出现异常“communications link failure with primary”。找不到主服务器的活动连接。“-请参阅附录2中的stacktrace
我的问题是：
我必须如何配置liquibase才能在aws rds aurora mysql数据库集群上运行它？
感谢并向智能家居制造商致以最诚挚的问候
附录1：液化酶特性：

# Enter the path for your changelog file.

changeLogFile=<CHANGE_LOG_FILENAME>

#### Enter the Target database 'url' information  ####

url=jdbc:mariadb:aurora//<ENDPOINT_URL_FOR_AWS_AURORA_PROD_CLUSTER>:<PORT_FOR_AWS_AURORA_PROD_CLUSTER>/<PROD_DATABASE_NAME>

# Enter the username for your Target database.

username: <PROD_DATABASE_USER>

# Enter the password for your Target database.

password: <PROD_DATABASE_PASSWORD>

#### Enter the Source Database 'referenceUrl' information ####

## The source database is the baseline or reference against which your target database is compared for diff/diffchangelog commands.

# Enter URL for the source database

referenceUrl: jdbc:mariadb:aurora//<ENDPOINT_URL_FOR_AWS_AURORA_DEV_CLUSTER>:<PORT_FOR_AWS_AURORA_DEV_CLUSTER>/<DEV_DATABASE_NAME>

# Enter the username for your source database

referenceUsername: <DEV_DATABASE_USER>

# Enter the password for your source database

referencePassword: <DEV_DATABASE_PASSWORD>

logLevel: DEBUG

附录2：stacktrace：

[2020-12-29 14:43:05] FEIN [liquibase.servicelocator] Loaded liquibase.license.LicenseService instance liquibase.pro.license.keymgr.DaticalTrueLicenseService
[2020-12-29 14:43:05] INFORMATION [liquibase.integration] No Liquibase Pro license key supplied. Please set liquibaseProLicenseKey on command line or in liquibase.properties to use Liquibase Pro features.
Liquibase Community 4.2.2 by Datical

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## Get documentation at docs.liquibase.com       ##

## Get certified courses at learn.liquibase.com  ##

## Free schema change activity reports at        ##

## https://hub.liquibase.com                 ##

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Starte Liquibase am 14:43:05 (Version 4.2.2 #36, kompiliert am 2020-12-09 20:07+0000)
[2020-12-29 14:43:05] FEIN [liquibase.integration] 'file:<PATH_TO_JAR_FILE>mariadb-java-client-2.7.1.jar' will be added to Java Classpath.
[2020-12-29 14:43:05] FEIN [liquibase.integration] Liquibase Hub URL:      https://hub.liquibase.com
[2020-12-29 14:43:05] FEIN [liquibase.integration] Liquibase Hub Mode:     all
[2020-12-29 14:43:05] FEIN [liquibase.resource] Adding path <PATH_WHERE_LIQUIBASE_IS_RUNNING>. to resourceAccessor liquibase.resource.FileSystemResourceAccessor
[2020-12-29 14:43:05] FEIN [liquibase.servicelocator] Loaded liquibase.database.Database instance liquibase.database.core.CockroachDatabase
[2020-12-29 14:43:05] FEIN [liquibase.servicelocator] Loaded liquibase.database.Database instance liquibase.database.core.DB2Database
[2020-12-29 14:43:05] FEIN [liquibase.servicelocator] Loaded liquibase.database.Database instance liquibase.database.core.Db2zDatabase
[2020-12-29 14:43:08] FEIN [liquibase.servicelocator] Loaded liquibase.database.Database instance liquibase.database.core.DerbyDatabase
[2020-12-29 14:43:08] FEIN [liquibase.servicelocator] Loaded liquibase.database.Database instance liquibase.database.core.Firebird3Database
[2020-12-29 14:43:08] FEIN [liquibase.servicelocator] Loaded liquibase.database.Database instance liquibase.database.core.FirebirdDatabase
[2020-12-29 14:43:08] FEIN [liquibase.servicelocator] Loaded liquibase.database.Database instance liquibase.database.core.H2Database
[2020-12-29 14:43:08] FEIN [liquibase.servicelocator] Loaded liquibase.database.Database instance liquibase.database.core.HsqlDatabase
[2020-12-29 14:43:08] FEIN [liquibase.servicelocator] Loaded liquibase.database.Database instance liquibase.database.core.InformixDatabase
[2020-12-29 14:43:08] FEIN [liquibase.servicelocator] Loaded liquibase.database.Database instance liquibase.database.core.Ingres9Database
[2020-12-29 14:43:08] FEIN [liquibase.servicelocator] Loaded liquibase.database.Database instance liquibase.database.core.MSSQLDatabase
[2020-12-29 14:43:08] FEIN [liquibase.servicelocator] Loaded liquibase.database.Database instance liquibase.database.core.MariaDBDatabase
[2020-12-29 14:43:08] FEIN [liquibase.servicelocator] Loaded liquibase.database.Database instance liquibase.database.core.MockDatabase
[2020-12-29 14:43:08] FEIN [liquibase.servicelocator] Loaded liquibase.database.Database instance liquibase.database.core.MySQLDatabase
[2020-12-29 14:43:08] FEIN [liquibase.servicelocator] Loaded liquibase.database.Database instance liquibase.database.core.OracleDatabase
[2020-12-29 14:43:08] FEIN [liquibase.servicelocator] Loaded liquibase.database.Database instance liquibase.database.core.PostgresDatabase
[2020-12-29 14:43:08] FEIN [liquibase.servicelocator] Loaded liquibase.database.Database instance liquibase.database.core.SQLiteDatabase
[2020-12-29 14:43:08] FEIN [liquibase.servicelocator] Loaded liquibase.database.Database instance liquibase.database.core.SybaseASADatabase
[2020-12-29 14:43:08] FEIN [liquibase.servicelocator] Loaded liquibase.database.Database instance liquibase.database.core.SybaseDatabase
[2020-12-29 14:43:08] FEIN [liquibase.servicelocator] Loaded liquibase.database.Database instance liquibase.database.core.UnsupportedDatabase
[2020-12-29 14:43:08] FEIN [liquibase.database] Properties:
[2020-12-29 14:43:08] FEIN [liquibase.database] Key:'password' Value:'**********'
[2020-12-29 14:43:08] FEIN [liquibase.database] Key:'user' Value:'***********'
[2020-12-29 14:43:08] FEIN [liquibase.database] Connecting to the URL:'jdbc:mariadb:aurora//jdbc:mariadb:aurora//<ENDPOINT_URL_FOR_AWS_AURORA_PROD_CLUSTER>:<PORT_FOR_AWS_AURORA_PROD_CLUSTER>/<PROD_DATABASE_NAME>' using driver:'org.mariadb.jdbc.Driver'
[2020-12-29 14:43:08] FEIN [liquibase.servicelocator] Loaded liquibase.database.DatabaseConnection instance liquibase.database.jvm.JdbcConnection
[2020-12-29 14:43:08] FEIN [liquibase.servicelocator] Loaded liquibase.database.DatabaseConnection instance com.datical.liquibase.ext.database.jvm.ProJdbcConnection
Unexpected exception when executing liquibase: liquibase.exception.DatabaseException: liquibase.exception.DatabaseException: Connection could not be created to jdbc:mariadb:aurora//jdbc:mariadb:aurora//<ENDPOINT_URL_FOR_AWS_AURORA_PROD_CLUSTER>:<PORT_FOR_AWS_AURORA_PROD_CLUSTER>/<PROD_DATABASE_NAME> with driver org.mariadb.jdbc.Driver.  Communications link failure with primary. No active connection found for master. 
Bitte verwenden Sie die '--logLevel'-Option, um mehr Informationen zu erhalten.
[2020-12-29 15:02:59] FATAL [liquibase.integration] Unexpected Exception when running liquibase: liquibase.exception.DatabaseException: liquibase.exception.DatabaseException: Connection could not be created to jdbc:mariadb:aurora//jdbc:mariadb:aurora//<ENDPOINT_URL_FOR_AWS_AURORA_PROD_CLUSTER>:<PORT_FOR_AWS_AURORA_PROD_CLUSTER>/<PROD_DATABASE_NAME> with driver org.mariadb.jdbc.Driver.  Communications link failure with primary. No active connection found for master. 
liquibase.exception.DatabaseException: liquibase.exception.DatabaseException: liquibase.exception.DatabaseException: liquibase.exception.DatabaseException: Connection could not be created to jdbc:mariadb:aurora//jdbc:mariadb:aurora//<ENDPOINT_URL_FOR_AWS_AURORA_PROD_CLUSTER>:<PORT_FOR_AWS_AURORA_PROD_CLUSTER>/<PROD_DATABASE_NAME> with driver org.mariadb.jdbc.Driver.  Communications link failure with primary. No active connection found for master. 
    at liquibase.integration.commandline.CommandLineUtils.createDatabaseObject(CommandLineUtils.java:131)
    at liquibase.integration.commandline.Main.doMigration(Main.java:1409)
    at liquibase.integration.commandline.Main$1.lambda$run$0(Main.java:361)
    at liquibase.Scope.lambda$child$0(Scope.java:160)
    at liquibase.Scope.child(Scope.java:169)
    at liquibase.Scope.child(Scope.java:159)
    at liquibase.Scope.child(Scope.java:138)
    at liquibase.Scope.child(Scope.java:222)
    at liquibase.Scope.child(Scope.java:226)
    at liquibase.integration.commandline.Main$1.run(Main.java:360)
    at liquibase.integration.commandline.Main$1.run(Main.java:193)
    at liquibase.Scope.child(Scope.java:169)
    at liquibase.Scope.child(Scope.java:145)
    at liquibase.integration.commandline.Main.run(Main.java:193)
    at liquibase.integration.commandline.Main.main(Main.java:156)
Caused by: liquibase.exception.DatabaseException: liquibase.exception.DatabaseException: liquibase.exception.DatabaseException: Connection could not be created to jdbc:mariadb:aurora//jdbc:mariadb:aurora//<ENDPOINT_URL_FOR_AWS_AURORA_PROD_CLUSTER>:<PORT_FOR_AWS_AURORA_PROD_CLUSTER>/<PROD_DATABASE_NAME> with driver org.mariadb.jdbc.Driver.  Communications link failure with primary. No active connection found for master. 
    at liquibase.database.DatabaseFactory.openConnection(DatabaseFactory.java:216)
    at liquibase.database.DatabaseFactory.openConnection(DatabaseFactory.java:175)
    at liquibase.database.DatabaseFactory.openDatabase(DatabaseFactory.java:140)
    at liquibase.integration.commandline.CommandLineUtils.createDatabaseObject(CommandLineUtils.java:96)
    ... 14 more
Caused by: liquibase.exception.DatabaseException: liquibase.exception.DatabaseException: Connection could not be created to jdbc:mariadb:aurora//jdbc:mariadb:aurora//<ENDPOINT_URL_FOR_AWS_AURORA_PROD_CLUSTER>:<PORT_FOR_AWS_AURORA_PROD_CLUSTER>/<PROD_DATABASE_NAME> with driver org.mariadb.jdbc.Driver.  Communications link failure with primary. No active connection found for master. 
    at liquibase.database.ConnectionServiceFactory.create(ConnectionServiceFactory.java:36)
    at liquibase.database.DatabaseFactory.openConnection(DatabaseFactory.java:213)
    ... 17 more
Caused by: liquibase.exception.DatabaseException: Connection could not be created to jdbc:mariadb:aurora//jdbc:mariadb:aurora//<ENDPOINT_URL_FOR_AWS_AURORA_PROD_CLUSTER>:<PORT_FOR_AWS_AURORA_PROD_CLUSTER>/<PROD_DATABASE_NAME> with driver org.mariadb.jdbc.Driver.  Communications link failure with primary. No active connection found for master. 
    at liquibase.database.jvm.JdbcConnection.open(JdbcConnection.java:43)
    at com.datical.liquibase.ext.database.jvm.ProJdbcConnection.open(Unknown Source)
    at liquibase.database.ConnectionServiceFactory.create(ConnectionServiceFactory.java:33)
    ... 18 more