Jerry-D

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Error updating database. Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is java.sql.SQLTransientConnectionException: iot - Connection is not available, request timed out after 30000ms

升级到3.0.4.2还是存在同样的问题 ![image](https://github.com/taosdata/TDengine/assets/51200648/59144ecb-7e81-45d3-a734-76a42cd6db8c) ![image](https://github.com/taosdata/TDengine/assets/51200648/dd87d28a-9686-45f3-bf7b-a6d2b81ce588)