mysqlnontransientconnectionexcetion: Could not create connection to database server. Attempted reconnect 3 times

当出现`mysqlnontransientconnectionexcetion: Could not create connection to database server. Attempted reconnect 3 times`错误时，可以尝试以下解决方法：

1. 在url后面拼接`?serverTimezone=UTC`，例如：

url = 'jdbc:mysql://localhost:3306/test?serverTimezone=UTC'

2. 如果连接成功后数据库不显示表，可以尝试设置`scheme`为当前数据库的名称，例如：

df = spark.read.format("jdbc") \
    .option("url", url) \
    .option("dbtable", "my_table") \
    .option("user", "root") \
    .option("password", "password") \
    .option("scheme", "test") \
    .load()

相关问题

Could not create connection to database server. Attempted reconnect 3 times.

这个错误通常是由于数据库连接失败引起的。可能是由于数据库服务器未启动、网络连接问题、数据库凭据错误或数据库配置错误等原因导致的。解决方法包括检查数据库服务器是否已启动、检查网络连接是否正常、检查数据库凭据是否正确以及检查数据库配置是否正确等。另外，根据引用中提供的解决方法，还可以尝试在url后面拼接?serverTimezone=UTC来解决这个问题。

Could not create connection to database server. Attempted reconnect 3 times

As an AI language model, I don't have access to your database server nor do I have the ability to fix connection issues. However, I can provide some general troubleshooting steps that might help:

1. Check your network connection: Make sure that you are connected to the internet and that your network connection is stable.

2. Check your database server settings: Make sure that the database server is running and that the settings are correct. Check the port number, username, password, and database name.

3. Check your firewall settings: Make sure that the firewall is not blocking the connection to the database server. Configure the firewall to allow access to the database server.

4. Restart the database server: Sometimes restarting the database server can fix connection issues.

5. Check the error logs: Check the error logs to see if there are any error messages that can help you diagnose the problem.

If none of these steps work, you may need to contact your database administrator or your hosting provider for further assistance.