那些搞不懂的數據庫鏈接異常

Caused by: java.sql.SQLTransientConnectionException: HikariPool-1 - Connection is not available, request timed out after 30010ms. 緣由：請求數據庫鏈接時長時間未獲取到時，會報這個錯誤 修改配置項：datasource.primary.connection-timeout

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