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報錯 XAConnectionFactory: failed to create pooled connection - DBMS down or unreachable?

出現以下錯誤:

報錯 XAConnectionFactory: failed to create pooled connection - DBMS down or unreachable?

在檢查資料庫連接配接資訊都不存在任何問題的情況下,

<dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>6.0.6</version>
        </dependency>