connect_retries and connect_timeout parameters don't have an effect

[henlue]

Describe the bug

The connect_retries and connect_timeout parameters in the profiles.yml don't have the effect that is described in the docs.

The retry functionality seems to be implemented, but the list of exceptions for which a retry happens is empty by default (here and here). It is possible to configure the connector to retry on all exceptions by setting retry_all: true and this will make the connect_retries and connect_timeout have the documented effects, but the retry_all parameter is not documented. I only found it while checking the code.

Depending on the desired behavior I see various ways to fix this:

1. Keep the existing behavior and update the documentation. For example by adding the retry_all parameter.
2. Change the existing behavior to match the documentation. For example:
   a) Add transient exceptions to the retryable_exceptions list
   b) Set retry_all to true by default (not sure about the side effects though)
   c) Forward the connect_retries and connect_timeout parameters to the databricks sql connector, if this is possible.

I would be willing to implement a fix or to take a deeper look into the implications of the various fixes I've described.

Steps To Reproduce

I've created a profiles.yml with invalid connection parameters and a high number of connect_retries:

databricks:
  outputs:
    test:
      type: databricks
      host: invalid
      http_path: invalid
      token: invalid
      schema: schema
      connect_retries: 1000

then executed dbt run

Expected behavior

I expect 1000 retries. Instead dbt tries to establish the connection for 15 minutes, like it does when connect_retries is set to 1 and then fails.

System information

The output of dbt --version:

Core:
  - installed: 1.8.4
  - latest:    1.8.5 - Update available!

  Your version of dbt-core is out of date!
  You can find instructions for upgrading here:
  https://docs.getdbt.com/docs/installation

Plugins:
  - spark:      1.8.0 - Up to date!
  - databricks: 1.8.3 - Update available!

The operating system you're using:
Ubuntu 22.04
The output of python --version:
Python 3.10.12

Additional context

We use a classic warehouse on Azure for our daily jobs. By default dbt databricks tries for 15 minutes to establish a connection to the warehouse, but sometimes this is not enough for the warehouse to start.

[caineblood]

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[benc-db]

Thanks for the report. Quite a few users have been asking about retries lately, so I think I'll need to look into it.